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Byte Buddy is a Java library for creating Java classes at run time.
This artifact is a build of Byte Buddy with a remaining dependency onto ASM.
You should never depend on this module without repackaging Byte Buddy and ASM into your own namespace.
/*
* Copyright 2014 - Present Rafael Winterhalter
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package net.bytebuddy.implementation;
import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
import net.bytebuddy.build.HashCodeAndEqualsPlugin;
import net.bytebuddy.description.annotation.AnnotationDescription;
import net.bytebuddy.description.annotation.AnnotationValue;
import net.bytebuddy.description.enumeration.EnumerationDescription;
import net.bytebuddy.description.field.FieldDescription;
import net.bytebuddy.description.method.MethodDescription;
import net.bytebuddy.description.method.MethodList;
import net.bytebuddy.description.method.ParameterDescription;
import net.bytebuddy.description.method.ParameterList;
import net.bytebuddy.description.type.TypeDefinition;
import net.bytebuddy.description.type.TypeDescription;
import net.bytebuddy.description.type.TypeList;
import net.bytebuddy.description.type.TypeVariableToken;
import net.bytebuddy.dynamic.scaffold.FieldLocator;
import net.bytebuddy.dynamic.scaffold.InstrumentedType;
import net.bytebuddy.dynamic.scaffold.MethodGraph;
import net.bytebuddy.implementation.bytecode.ByteCodeAppender;
import net.bytebuddy.implementation.bytecode.Removal;
import net.bytebuddy.implementation.bytecode.StackManipulation;
import net.bytebuddy.implementation.bytecode.assign.Assigner;
import net.bytebuddy.implementation.bytecode.constant.*;
import net.bytebuddy.implementation.bytecode.member.FieldAccess;
import net.bytebuddy.implementation.bytecode.member.MethodInvocation;
import net.bytebuddy.implementation.bytecode.member.MethodReturn;
import net.bytebuddy.implementation.bytecode.member.MethodVariableAccess;
import net.bytebuddy.utility.*;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import static net.bytebuddy.matcher.ElementMatchers.isAbstract;
import static net.bytebuddy.matcher.ElementMatchers.named;
/**
* An implementation that applies a
* dynamic method invocation.
*/
@HashCodeAndEqualsPlugin.Enhance
public class InvokeDynamic implements Implementation.Composable {
/**
* The bootstrap method.
*/
protected final MethodDescription.InDefinedShape bootstrap;
/**
* The arguments that are provided to the bootstrap method.
*/
protected final List arguments;
/**
* The target provided that identifies the method to be bootstrapped.
*/
protected final InvocationProvider invocationProvider;
/**
* A handler that handles the method return.
*/
protected final TerminationHandler terminationHandler;
/**
* The assigner to be used.
*/
protected final Assigner assigner;
/**
* Indicates if dynamic type castings should be attempted for incompatible assignments.
*/
protected final Assigner.Typing typing;
/**
* Creates a new invoke dynamic implementation.
*
* @param bootstrap The bootstrap method.
* @param arguments The arguments that are provided to the bootstrap method.
* @param invocationProvider The target provided that identifies the method to be bootstrapped.
* @param terminationHandler A handler that handles the method return.
* @param assigner The assigner to be used.
* @param typing Indicates if dynamic type castings should be attempted for incompatible assignments.
*/
protected InvokeDynamic(MethodDescription.InDefinedShape bootstrap,
List arguments,
InvocationProvider invocationProvider,
TerminationHandler terminationHandler,
Assigner assigner,
Assigner.Typing typing) {
this.bootstrap = bootstrap;
this.arguments = arguments;
this.invocationProvider = invocationProvider;
this.terminationHandler = terminationHandler;
this.assigner = assigner;
this.typing = typing;
}
/**
* Implements the instrumented method with a dynamic method invocation which is linked at runtime using the
* specified bootstrap method.
*
* @param method The bootstrap method that is used to link the instrumented method.
* @param constant The constant values passed to the bootstrap method. Values can be represented either
* as {@link TypeDescription}, as {@link JavaConstant}, as {@link String} or a primitive
* {@code int}, {@code long}, {@code float} or {@code double} represented as wrapper type.
* @return An implementation where a {@code this} reference, if available, and all arguments of the
* instrumented method are passed to the bootstrapped method unless explicit parameters are specified.
*/
public static WithImplicitTarget bootstrap(Method method, Object... constant) {
return bootstrap(new MethodDescription.ForLoadedMethod(method), constant);
}
/**
* Implements the instrumented method with a dynamic method invocation which is linked at runtime using the
* specified bootstrap method.
*
* @param method The bootstrap method that is used to link the instrumented method.
* @param constants The constant values passed to the bootstrap method. Values can be represented either
* as {@link TypeDescription}, as {@link JavaConstant}, as {@link String} or a primitive
* {@code int}, {@code long}, {@code float} or {@code double} represented as wrapper type.
* @return An implementation where a {@code this} reference, if available, and all arguments of the
* instrumented method are passed to the bootstrapped method unless explicit parameters are specified.
*/
public static WithImplicitTarget bootstrap(Method method, List constants) {
return bootstrap(new MethodDescription.ForLoadedMethod(method), constants);
}
/**
* Implements the instrumented method with a dynamic method invocation which is linked at runtime using the
* specified bootstrap constructor.
*
* @param constructor The bootstrap constructor that is used to link the instrumented method.
* @param constant The constant values passed to the bootstrap method. Values can be represented either
* as {@link TypeDescription}, as {@link JavaConstant}, as {@link String} or a primitive
* {@code int}, {@code long}, {@code float} or {@code double} represented as wrapper type.
* @return An implementation where a {@code this} reference, if available, and all arguments of the
* instrumented method are passed to the bootstrapped method unless explicit parameters are specified.
*/
public static WithImplicitTarget bootstrap(Constructor constructor, Object... constant) {
return bootstrap(new MethodDescription.ForLoadedConstructor(constructor), constant);
}
/**
* Implements the instrumented method with a dynamic method invocation which is linked at runtime using the
* specified bootstrap constructor.
*
* @param constructor The bootstrap constructor that is used to link the instrumented method.
* @param constants The constant values passed to the bootstrap method. Values can be represented either
* as {@link TypeDescription}, as {@link JavaConstant}, as {@link String} or a primitive
* {@code int}, {@code long}, {@code float} or {@code double} represented as wrapper type.
* @return An implementation where a {@code this} reference, if available, and all arguments of the
* instrumented method are passed to the bootstrapped method unless explicit parameters are specified.
*/
public static WithImplicitTarget bootstrap(Constructor constructor, List constants) {
return bootstrap(new MethodDescription.ForLoadedConstructor(constructor), constants);
}
/**
* Implements the instrumented method with a dynamic method invocation which is linked at runtime using the
* specified bootstrap method or constructor.
*
* @param bootstrap The bootstrap method or constructor that is used to link the instrumented method.
* @param constant The constant values passed to the bootstrap method. Values can be represented either
* as {@link TypeDescription}, as {@link JavaConstant}, as {@link String} or a primitive
* {@code int}, {@code long}, {@code float} or {@code double} represented as wrapper type.
* @return An implementation where a {@code this} reference, if available, and all arguments of the
* instrumented method are passed to the bootstrapped method unless explicit parameters are specified.
*/
public static WithImplicitTarget bootstrap(MethodDescription.InDefinedShape bootstrap, Object... constant) {
return bootstrap(bootstrap, Arrays.asList(constant));
}
/**
* Implements the instrumented method with a dynamic method invocation which is linked at runtime using the
* specified bootstrap method or constructor.
*
* @param bootstrap The bootstrap method or constructor that is used to link the instrumented method.
* @param constants The constant values passed to the bootstrap method. Values can be represented either
* as {@link TypeDescription}, as {@link JavaConstant}, as {@link String} or a primitive
* {@code int}, {@code long}, {@code float} or {@code double} represented as wrapper type.
* @return An implementation where a {@code this} reference, if available, and all arguments of the
* instrumented method are passed to the bootstrapped method unless explicit parameters are specified.
*/
public static WithImplicitTarget bootstrap(MethodDescription.InDefinedShape bootstrap, List constants) {
List arguments = JavaConstant.Simple.wrap(constants);
if (!bootstrap.isInvokeBootstrap(TypeList.Explicit.of(arguments))) {
throw new IllegalArgumentException("Not a valid bootstrap method " + bootstrap + " for " + arguments);
}
return new WithImplicitTarget(bootstrap,
arguments,
new InvocationProvider.Default(),
TerminationHandler.RETURNING,
Assigner.DEFAULT,
Assigner.Typing.STATIC);
}
/**
*
* Creates a lambda expression using the JVM's lambda meta factory. The method that is implementing the lambda expression is provided
* the explicit arguments first and the functional interface's method second.
*
*
* Important: Byte Buddy does not validate that the provided arguments are correct considering the required arguments of the bound
* functional interface. Binding an incorrect number of arguments or arguments of incompatible types does not create illegal byte code
* but yields a runtime error when the call site is first used. This is done to support future extensions or alternative implementations
* of the Java virtual machine.
*
*
* @param method The method that implements the lambda expression.
* @param functionalInterface The functional interface that is an instance of the lambda expression.
* @return A builder for creating a lambda expression.
*/
public static WithImplicitArguments lambda(Method method, Type functionalInterface) {
return lambda(new MethodDescription.ForLoadedMethod(method), TypeDefinition.Sort.describe(functionalInterface));
}
/**
*
* Creates a lambda expression using the JVM's lambda meta factory. The method that is implementing the lambda expression is provided
* the explicit arguments first and the functional interface's method second.
*
*
* Important: Byte Buddy does not validate that the provided arguments are correct considering the required arguments of the bound
* functional interface. Binding an incorrect number of arguments or arguments of incompatible types does not create illegal byte code
* but yields a runtime error when the call site is first used. This is done to support future extensions or alternative implementations
* of the Java virtual machine.
*
*
* @param method The method that implements the lambda expression.
* @param functionalInterface The functional interface that is an instance of the lambda expression.
* @param methodGraphCompiler The method graph compiler to use.
* @return A builder for creating a lambda expression.
*/
public static WithImplicitArguments lambda(Method method, Type functionalInterface, MethodGraph.Compiler methodGraphCompiler) {
return lambda(new MethodDescription.ForLoadedMethod(method), TypeDefinition.Sort.describe(functionalInterface), methodGraphCompiler);
}
/**
*
* Creates a lambda expression using the JVM's lambda meta factory. The method that is implementing the lambda expression is provided
* the explicit arguments first and the functional interface's method second.
*
*
* Important: Byte Buddy does not validate that the provided arguments are correct considering the required arguments of the bound
* functional interface. Binding an incorrect number of arguments or arguments of incompatible types does not create illegal byte code
* but yields a runtime error when the call site is first used. This is done to support future extensions or alternative implementations
* of the Java virtual machine.
*
*
* @param methodDescription The method that implements the lambda expression.
* @param functionalInterface The functional interface that is an instance of the lambda expression.
* @return A builder for creating a lambda expression.
*/
public static WithImplicitArguments lambda(MethodDescription.InDefinedShape methodDescription, TypeDefinition functionalInterface) {
return lambda(methodDescription, functionalInterface, MethodGraph.Compiler.Default.forJavaHierarchy());
}
/**
*
* Creates a lambda expression using the JVM's lambda meta factory. The method that is implementing the lambda expression is provided
* the explicit arguments first and the functional interface's method second.
*
*
* Important: Byte Buddy does not validate that the provided arguments are correct considering the required arguments of the bound
* functional interface. Binding an incorrect number of arguments or arguments of incompatible types does not create illegal byte code
* but yields a runtime error when the call site is first used. This is done to support future extensions or alternative implementations
* of the Java virtual machine.
*
*
* @param methodDescription The method that implements the lambda expression.
* @param functionalInterface The functional interface that is an instance of the lambda expression.
* @param methodGraphCompiler The method graph compiler to use.
* @return A builder for creating a lambda expression.
*/
public static WithImplicitArguments lambda(MethodDescription.InDefinedShape methodDescription,
TypeDefinition functionalInterface,
MethodGraph.Compiler methodGraphCompiler) {
if (!functionalInterface.isInterface()) {
throw new IllegalArgumentException(functionalInterface + " is not an interface type");
}
MethodList methods = methodGraphCompiler.compile(functionalInterface)
.listNodes()
.asMethodList()
.filter(isAbstract());
if (methods.size() != 1) {
throw new IllegalArgumentException(functionalInterface + " does not define exactly one abstract method: " + methods);
}
return bootstrap(new MethodDescription.Latent(new TypeDescription.Latent("java.lang.invoke.LambdaMetafactory",
Opcodes.ACC_PUBLIC,
TypeDescription.Generic.OfNonGenericType.ForLoadedType.of(Object.class)),
"metafactory",
Opcodes.ACC_STATIC | Opcodes.ACC_PUBLIC,
Collections.emptyList(),
JavaType.CALL_SITE.getTypeStub().asGenericType(),
Arrays.asList(new ParameterDescription.Token(JavaType.METHOD_HANDLES_LOOKUP.getTypeStub().asGenericType()),
new ParameterDescription.Token(TypeDescription.ForLoadedType.of(String.class).asGenericType()),
new ParameterDescription.Token(JavaType.METHOD_TYPE.getTypeStub().asGenericType()),
new ParameterDescription.Token(JavaType.METHOD_TYPE.getTypeStub().asGenericType()),
new ParameterDescription.Token(JavaType.METHOD_HANDLE.getTypeStub().asGenericType()),
new ParameterDescription.Token(JavaType.METHOD_TYPE.getTypeStub().asGenericType())),
Collections.emptyList(),
Collections.emptyList(),
AnnotationValue.UNDEFINED,
TypeDescription.Generic.UNDEFINED),
JavaConstant.MethodType.ofSignature(methods.asDefined().getOnly()),
JavaConstant.MethodHandle.of(methodDescription),
JavaConstant.MethodType.ofSignature(methods.getOnly())).invoke(methods.asDefined().getOnly().getInternalName());
}
/**
* Requires the bootstrap method to bootstrap a method that takes the specified {@code boolean} arguments
* as its next parameters.
*
* @param value The arguments to pass to the bootstrapped method.
* @return This invoke dynamic implementation where the bootstrapped method is passed the specified arguments.
*/
public InvokeDynamic withBooleanValue(boolean... value) {
List argumentProviders = new ArrayList(value.length);
for (boolean aValue : value) {
argumentProviders.add(new InvocationProvider.ArgumentProvider.ForBooleanConstant(aValue));
}
return new InvokeDynamic(bootstrap,
arguments,
invocationProvider.appendArguments(argumentProviders),
terminationHandler,
assigner,
typing);
}
/**
* Requires the bootstrap method to bootstrap a method that takes the specified {@code byte} arguments
* as its next parameters.
*
* @param value The arguments to pass to the bootstrapped method.
* @return This invoke dynamic implementation where the bootstrapped method is passed the specified arguments.
*/
public InvokeDynamic withByteValue(byte... value) {
List argumentProviders = new ArrayList(value.length);
for (byte aValue : value) {
argumentProviders.add(new InvocationProvider.ArgumentProvider.ForByteConstant(aValue));
}
return new InvokeDynamic(bootstrap,
arguments,
invocationProvider.appendArguments(argumentProviders),
terminationHandler,
assigner,
typing);
}
/**
* Requires the bootstrap method to bootstrap a method that takes the specified {@code short} arguments
* as its next parameters.
*
* @param value The arguments to pass to the bootstrapped method.
* @return This invoke dynamic implementation where the bootstrapped method is passed the specified arguments.
*/
public InvokeDynamic withShortValue(short... value) {
List argumentProviders = new ArrayList(value.length);
for (short aValue : value) {
argumentProviders.add(new InvocationProvider.ArgumentProvider.ForShortConstant(aValue));
}
return new InvokeDynamic(bootstrap,
arguments,
invocationProvider.appendArguments(argumentProviders),
terminationHandler,
assigner,
typing);
}
/**
* Requires the bootstrap method to bootstrap a method that takes the specified {@code char} arguments
* as its next parameters.
*
* @param value The arguments to pass to the bootstrapped method.
* @return This invoke dynamic implementation where the bootstrapped method is passed the specified arguments.
*/
public InvokeDynamic withCharacterValue(char... value) {
List argumentProviders = new ArrayList(value.length);
for (char aValue : value) {
argumentProviders.add(new InvocationProvider.ArgumentProvider.ForCharacterConstant(aValue));
}
return new InvokeDynamic(bootstrap,
arguments,
invocationProvider.appendArguments(argumentProviders),
terminationHandler,
assigner,
typing);
}
/**
* Requires the bootstrap method to bootstrap a method that takes the specified {@code int} arguments
* as its next parameters.
*
* @param value The arguments to pass to the bootstrapped method.
* @return This invoke dynamic implementation where the bootstrapped method is passed the specified arguments.
*/
public InvokeDynamic withIntegerValue(int... value) {
List argumentProviders = new ArrayList(value.length);
for (int aValue : value) {
argumentProviders.add(new InvocationProvider.ArgumentProvider.ForIntegerConstant(aValue));
}
return new InvokeDynamic(bootstrap,
arguments,
invocationProvider.appendArguments(argumentProviders),
terminationHandler,
assigner,
typing);
}
/**
* Requires the bootstrap method to bootstrap a method that takes the specified {@code long} arguments
* as its next parameters.
*
* @param value The arguments to pass to the bootstrapped method.
* @return This invoke dynamic implementation where the bootstrapped method is passed the specified arguments.
*/
public InvokeDynamic withLongValue(long... value) {
List argumentProviders = new ArrayList(value.length);
for (long aValue : value) {
argumentProviders.add(new InvocationProvider.ArgumentProvider.ForLongConstant(aValue));
}
return new InvokeDynamic(bootstrap,
arguments,
invocationProvider.appendArguments(argumentProviders),
terminationHandler,
assigner,
typing);
}
/**
* Requires the bootstrap method to bootstrap a method that takes the specified {@code float} arguments
* as its next parameters.
*
* @param value The arguments to pass to the bootstrapped method.
* @return This invoke dynamic implementation where the bootstrapped method is passed the specified arguments.
*/
public InvokeDynamic withFloatValue(float... value) {
List argumentProviders = new ArrayList(value.length);
for (float aValue : value) {
argumentProviders.add(new InvocationProvider.ArgumentProvider.ForFloatConstant(aValue));
}
return new InvokeDynamic(bootstrap,
arguments,
invocationProvider.appendArguments(argumentProviders),
terminationHandler,
assigner,
typing);
}
/**
* Requires the bootstrap method to bootstrap a method that takes the specified {@code double} arguments
* as its next parameters.
*
* @param value The arguments to pass to the bootstrapped method.
* @return This invoke dynamic implementation where the bootstrapped method is passed the specified arguments.
*/
public InvokeDynamic withDoubleValue(double... value) {
List argumentProviders = new ArrayList(value.length);
for (double aValue : value) {
argumentProviders.add(new InvocationProvider.ArgumentProvider.ForDoubleConstant(aValue));
}
return new InvokeDynamic(bootstrap,
arguments,
invocationProvider.appendArguments(argumentProviders),
terminationHandler,
assigner,
typing);
}
/**
*
* Requires the bootstrap method to bootstrap a method that takes the specified arguments as its next parameters.
* Note that any primitive parameters are passed as their wrapper types. Furthermore, values that can be stored
* in the instrumented class's constant pool might be of different object identity when passed to the
* bootstrapped method or might not be visible to the the created class what later results in a runtime error.
*
*
* @param value The arguments to pass to the bootstrapped method.
* @return This invoke dynamic implementation where the bootstrapped method is passed the specified arguments.
*/
public InvokeDynamic withValue(Object... value) {
List argumentProviders = new ArrayList(value.length);
for (Object aValue : value) {
argumentProviders.add(InvocationProvider.ArgumentProvider.ConstantPoolWrapper.of(aValue));
}
return new InvokeDynamic(bootstrap,
arguments,
invocationProvider.appendArguments(argumentProviders),
terminationHandler,
assigner,
typing);
}
/**
*
* Requires the bootstrap method to bootstrap a method that takes the specified argument as its next parameter while
* allowing to specify the value to be of a different type than the actual instance type.
*
*
* @param value The arguments to pass to the bootstrapped method.
* @return This invoke dynamic implementation where the bootstrapped method is passed the specified arguments.
*/
public WithImplicitType withReference(Object value) {
return new WithImplicitType.OfInstance(bootstrap,
arguments,
invocationProvider,
terminationHandler,
assigner,
typing,
value);
}
/**
* Requires the bootstrap method to bootstrap a method that takes the specified arguments as its next parameters.
* Note that any primitive parameters are passed as their wrapper types. Any value that is passed to the
* bootstrapped method is guaranteed to be of the same object identity.
*
* @param value The arguments to pass to the bootstrapped method.
* @return This invoke dynamic implementation where the bootstrapped method is passed the specified arguments.
*/
public InvokeDynamic withReference(Object... value) {
List argumentProviders = new ArrayList(value.length);
for (Object aValue : value) {
argumentProviders.add(InvocationProvider.ArgumentProvider.ForInstance.of(aValue));
}
return new InvokeDynamic(bootstrap,
arguments,
invocationProvider.appendArguments(argumentProviders),
terminationHandler,
assigner,
typing);
}
/**
* Hands the provided types to the dynamically bound method. The type is stored in the generated class's
* constant pool and is loaded at invocation time. For this to be possible, the created class's
* class loader must be able to see the provided type.
*
* @param typeDescription The classes to provide to the bound method as an argument.
* @return This invoke dynamic implementation where the bootstrapped method is passed the specified type.
*/
public InvokeDynamic withType(TypeDescription... typeDescription) {
List argumentProviders = new ArrayList(typeDescription.length);
for (TypeDescription aTypeDescription : typeDescription) {
argumentProviders.add(new InvocationProvider.ArgumentProvider.ForClassConstant(aTypeDescription));
}
return new InvokeDynamic(bootstrap,
arguments,
invocationProvider.appendArguments(argumentProviders),
terminationHandler,
assigner,
typing);
}
/**
* Hands the provided enumerations to the dynamically bound method. The enumeration values are read from
* the enumeration class on demand. For this to be possible, the created class's class loader must be
* able to see the enumeration type.
*
* @param enumerationDescription The enumeration values to provide to the bound method as an argument.
* @return This invoke dynamic implementation where the bootstrapped method is passed the specified enumerations.
*/
public InvokeDynamic withEnumeration(EnumerationDescription... enumerationDescription) {
List argumentProviders = new ArrayList(enumerationDescription.length);
for (EnumerationDescription anEnumerationDescription : enumerationDescription) {
argumentProviders.add(new InvocationProvider.ArgumentProvider.ForEnumerationValue(anEnumerationDescription));
}
return new InvokeDynamic(bootstrap,
arguments,
invocationProvider.appendArguments(argumentProviders),
terminationHandler,
assigner,
typing);
}
/**
* Hands the provided Java instance to the dynamically bound method. The instance is stored in the generated class's
* constant pool and is loaded at invocation time. For this to be possible, the created class's class loader must
* be able to create the provided Java instance.
*
* @param constant The constants to provide to the bound method as an argument.
* @return This invoke dynamic implementation where the bootstrapped method is passed the specified Java instance.
*/
public InvokeDynamic withInstance(ConstantValue... constant) {
List argumentProviders = new ArrayList(constant.length);
for (ConstantValue aConstant : constant) {
argumentProviders.add(new InvocationProvider.ArgumentProvider.ForJavaConstant(aConstant));
}
return new InvokeDynamic(bootstrap,
arguments,
invocationProvider.appendArguments(argumentProviders),
terminationHandler,
assigner,
typing);
}
/**
* Hands the provided Java instance to the dynamically bound method. The instance is stored in the generated class's
* constant pool and is loaded at invocation time. For this to be possible, the created class's class loader must
* be able to create the provided Java instance.
*
* @param constant The constants to provide to the bound method as an argument.
* @return This invoke dynamic implementation where the bootstrapped method is passed the specified Java instance.
*/
public InvokeDynamic withInstance(JavaConstant... constant) {
return withInstance((ConstantValue[]) constant);
}
/**
* Passes {@code null} values of the given types to the bootstrapped method.
*
* @param type The type that the {@code null} values should represent.
* @return This invoke dynamic implementation where the bootstrapped method is passed the specified arguments.
*/
public InvokeDynamic withNullValue(Class... type) {
return withNullValue(new TypeList.ForLoadedTypes(type).toArray(new TypeDescription[0]));
}
/**
* Passes {@code null} values of the given types to the bootstrapped method.
*
* @param typeDescription The type that the {@code null} values should represent.
* @return This invoke dynamic implementation where the bootstrapped method is passed the specified arguments.
*/
public InvokeDynamic withNullValue(TypeDescription... typeDescription) {
List argumentProviders = new ArrayList(typeDescription.length);
for (TypeDescription aTypeDescription : typeDescription) {
if (aTypeDescription.isPrimitive()) {
throw new IllegalArgumentException("Cannot assign null to primitive type: " + aTypeDescription);
}
argumentProviders.add(new InvocationProvider.ArgumentProvider.ForNullValue(aTypeDescription));
}
return new InvokeDynamic(bootstrap,
arguments,
invocationProvider.appendArguments(argumentProviders),
terminationHandler,
assigner,
typing);
}
/**
* Passes parameters of the instrumented method to the bootstrapped method.
*
* @param index The indices of the parameters that should be passed to the bootstrapped method.
* @return This invoke dynamic implementation where the bootstrapped method is passed the specified arguments.
*/
public InvokeDynamic withArgument(int... index) {
List argumentProviders = new ArrayList(index.length);
for (int anIndex : index) {
if (anIndex < 0) {
throw new IllegalArgumentException("Method parameter indices cannot be negative: " + anIndex);
}
argumentProviders.add(new InvocationProvider.ArgumentProvider.ForMethodParameter(anIndex));
}
return new InvokeDynamic(bootstrap,
arguments,
invocationProvider.appendArguments(argumentProviders),
terminationHandler,
assigner,
typing);
}
/**
* Passes a parameter of the instrumented method to the bootstrapped method.
*
* @param index The index of the parameter that should be passed to the bootstrapped method.
* @return This invoke dynamic implementation where the bootstrapped method is passed the specified argument
* with its implicit type.
*/
public WithImplicitType withArgument(int index) {
if (index < 0) {
throw new IllegalArgumentException("Method parameter indices cannot be negative: " + index);
}
return new WithImplicitType.OfArgument(bootstrap,
arguments,
invocationProvider,
terminationHandler,
assigner,
typing,
index);
}
/**
* Passes references to {@code this} onto the operand stack where the instance is represented as
* the given types.
*
* @param type The types as which the {@code this} reference of the intercepted method should be masked.
* @return This implementation where {@code this} references are passed as the next arguments.
*/
public InvokeDynamic withThis(Class... type) {
return withThis(new TypeList.ForLoadedTypes(type).toArray(new TypeDescription[0]));
}
/**
* Passes references to {@code this} onto the operand stack where the instance is represented as
* the given types.
*
* @param typeDescription The types as which the {@code this} reference of the intercepted method should be masked.
* @return This implementation where {@code this} references are passed as the next arguments.
*/
public InvokeDynamic withThis(TypeDescription... typeDescription) {
List argumentProviders = new ArrayList(typeDescription.length);
for (TypeDescription aTypeDescription : typeDescription) {
argumentProviders.add(new InvocationProvider.ArgumentProvider.ForThisInstance(aTypeDescription));
}
return new InvokeDynamic(bootstrap,
arguments,
invocationProvider.appendArguments(argumentProviders),
terminationHandler,
assigner,
typing);
}
/**
* Adds all method arguments to the the bootstrapped method.
*
* @return This invoke dynamic implementation with all parameters of the instrumented method added.
*/
public InvokeDynamic withMethodArguments() {
return new InvokeDynamic(bootstrap,
arguments,
invocationProvider.appendArgument(InvocationProvider.ArgumentProvider.ForInterceptedMethodParameters.INSTANCE),
terminationHandler,
assigner,
typing);
}
/**
* Adds a potential {@code this} reference and all method arguments to the the bootstrapped method.
*
* @return This invoke dynamic implementation with a potential {@code this} reference and all
* parameters of the instrumented method added.
*/
public InvokeDynamic withImplicitAndMethodArguments() {
return new InvokeDynamic(bootstrap,
arguments,
invocationProvider.appendArgument(InvocationProvider.ArgumentProvider.ForInterceptedMethodInstanceAndParameters.INSTANCE),
terminationHandler,
assigner,
typing);
}
/**
* Passes the values of the specified fields to the bootstrap method. Any of the specified fields must already
* exist for the instrumented type.
*
* @param name The names of the fields to be passed to the bootstrapped method.
* @return This invoke dynamic implementation where the bootstrapped method is passed the specified arguments.
*/
public InvokeDynamic withField(String... name) {
return withField(FieldLocator.ForClassHierarchy.Factory.INSTANCE, name);
}
/**
* Passes the values of the specified fields to the bootstrap method. Any of the specified fields must already
* exist for the instrumented type.
*
* @param fieldLocatorFactory The field locator factory to use.
* @param name The names of the fields to be passed to the bootstrapped method.
* @return This invoke dynamic implementation where the bootstrapped method is passed the specified arguments.
*/
public InvokeDynamic withField(FieldLocator.Factory fieldLocatorFactory, String... name) {
List argumentProviders = new ArrayList(name.length);
for (String aName : name) {
argumentProviders.add(new InvocationProvider.ArgumentProvider.ForField(aName, fieldLocatorFactory));
}
return new InvokeDynamic(bootstrap,
arguments,
invocationProvider.appendArguments(argumentProviders),
terminationHandler,
assigner,
typing);
}
/**
* Passes the values of the specified fields to the bootstrap method. Any of the specified fields must already
* exist for the instrumented type.
*
* @param name The names of the fields to be passed to the bootstrapped method.
* @return This invoke dynamic implementation where the bootstrapped method is passed the specified arguments.
*/
public WithImplicitType withField(String name) {
return withField(name, FieldLocator.ForClassHierarchy.Factory.INSTANCE);
}
/**
* Passes the values of the specified fields to the bootstrap method. Any of the specified fields must already
* exist for the instrumented type.
*
* @param fieldLocatorFactory The field locator factory to use.
* @param name The names of the fields to be passed to the bootstrapped method.
* @return This invoke dynamic implementation where the bootstrapped method is passed the specified arguments.
*/
public WithImplicitType withField(String name, FieldLocator.Factory fieldLocatorFactory) {
return new WithImplicitType.OfField(bootstrap,
arguments,
invocationProvider,
terminationHandler,
assigner,
typing,
name,
fieldLocatorFactory);
}
/**
* Instructs this implementation to use the provided assigner and decides if the assigner should apply
* dynamic typing.
*
* @param assigner The assigner to use.
* @param typing {@code true} if the assigner should attempt dynamic typing.
* @return The invoke dynamic instruction where the given assigner and dynamic-typing directive are applied.
*/
public Implementation.Composable withAssigner(Assigner assigner, Assigner.Typing typing) {
return new InvokeDynamic(bootstrap,
arguments,
invocationProvider,
terminationHandler,
assigner,
typing);
}
/**
* {@inheritDoc}
*/
public Implementation andThen(Implementation implementation) {
return new Implementation.Compound(new InvokeDynamic(bootstrap,
arguments,
invocationProvider,
TerminationHandler.DROPPING,
assigner,
typing),
implementation);
}
/**
* {@inheritDoc}
*/
public Composable andThen(Composable implementation) {
return new Implementation.Compound.Composable(new InvokeDynamic(bootstrap,
arguments,
invocationProvider,
TerminationHandler.DROPPING,
assigner,
typing),
implementation);
}
/**
* {@inheritDoc}
*/
public InstrumentedType prepare(InstrumentedType instrumentedType) {
return invocationProvider.prepare(instrumentedType);
}
/**
* {@inheritDoc}
*/
public ByteCodeAppender appender(Target implementationTarget) {
return new Appender(implementationTarget.getInstrumentedType());
}
/**
* An invocation provider is responsible for loading the arguments of the invoked method onto the operand
* stack and for creating the actual invoke dynamic instruction.
*/
protected interface InvocationProvider {
/**
* Creates a target for the invocation.
*
* @param methodDescription The method that is being intercepted.
* @return The target for the invocation.
*/
Target make(MethodDescription methodDescription);
/**
* Appends the given arguments to the invocation to be loaded onto the operand stack.
*
* @param argumentProviders The next arguments to be loaded onto the operand stack.
* @return An invocation provider for this target that loads the given arguments onto the operand stack.
*/
InvocationProvider appendArguments(List argumentProviders);
/**
* Appends the given argument to the invocation to be loaded onto the operand stack.
*
* @param argumentProvider The next argument to be loaded onto the operand stack.
* @return An invocation provider for this target that loads the given arguments onto the operand stack.
*/
InvocationProvider appendArgument(ArgumentProvider argumentProvider);
/**
* Returns a copy of this invocation provider that does not add any arguments.
*
* @return A copy of this invocation provider that does not add any arguments.
*/
InvocationProvider withoutArguments();
/**
* Returns a copy of this invocation provider that applies the given name provider.
*
* @param nameProvider The name provider to be used.
* @return A copy of this invocation provider that applies the given name provider.
*/
InvocationProvider withNameProvider(NameProvider nameProvider);
/**
* Returns a copy of this invocation provider that applies the given return type provider.
*
* @param returnTypeProvider The return type provider to be used.
* @return A copy of this invocation provider that applies the given return type provider.
*/
InvocationProvider withReturnTypeProvider(ReturnTypeProvider returnTypeProvider);
/**
* Prepares the instrumented type.
*
* @param instrumentedType The instrumented type to prepare.
* @return The prepared instrumented type.
*/
InstrumentedType prepare(InstrumentedType instrumentedType);
/**
* A target for a dynamic method invocation.
*/
interface Target {
/**
* Resolves the target.
*
* @param instrumentedType The instrumented type.
* @param assigner The assigner to be used.
* @param typing Indicates if dynamic type castings should be attempted for incompatible assignments.
* @return The resolved target.
*/
Resolved resolve(TypeDescription instrumentedType, Assigner assigner, Assigner.Typing typing);
/**
* Represents a resolved {@link net.bytebuddy.implementation.InvokeDynamic.InvocationProvider.Target}.
*/
interface Resolved {
/**
* Returns the stack manipulation that loads the arguments onto the operand stack.
*
* @return The stack manipulation that loads the arguments onto the operand stack.
*/
StackManipulation getStackManipulation();
/**
* Returns the requested return type.
*
* @return The requested return type.
*/
TypeDescription getReturnType();
/**
* Returns the internal name of the requested method.
*
* @return The internal name of the requested method.
*/
String getInternalName();
/**
* Returns the types of the values on the operand stack.
*
* @return The types of the values on the operand stack.
*/
List getParameterTypes();
/**
* A simple implementation of
* {@link net.bytebuddy.implementation.InvokeDynamic.InvocationProvider.Target.Resolved}.
*/
@HashCodeAndEqualsPlugin.Enhance
class Simple implements Resolved {
/**
* The stack manipulation that loads the arguments onto the operand stack.
*/
private final StackManipulation stackManipulation;
/**
* The internal name of the requested method.
*/
private final String internalName;
/**
* The requested return type.
*/
private final TypeDescription returnType;
/**
* The types of the values on the operand stack.
*/
private final List parameterTypes;
/**
* Creates a new simple instance.
*
* @param stackManipulation The stack manipulation that loads the arguments onto the operand stack.
* @param internalName The internal name of the requested method.
* @param returnType The requested return type.
* @param parameterTypes The types of the values on the operand stack.
*/
public Simple(StackManipulation stackManipulation,
String internalName,
TypeDescription returnType,
List parameterTypes) {
this.stackManipulation = stackManipulation;
this.internalName = internalName;
this.returnType = returnType;
this.parameterTypes = parameterTypes;
}
/**
* {@inheritDoc}
*/
public StackManipulation getStackManipulation() {
return stackManipulation;
}
/**
* {@inheritDoc}
*/
public TypeDescription getReturnType() {
return returnType;
}
/**
* {@inheritDoc}
*/
public String getInternalName() {
return internalName;
}
/**
* {@inheritDoc}
*/
public List getParameterTypes() {
return parameterTypes;
}
}
}
}
/**
* An argument provider is responsible for loading arguments to a bootstrapped method onto the operand
* stack and providing the types of these arguments.
*/
interface ArgumentProvider {
/**
* Resolves an argument provider.
*
* @param instrumentedType The instrumented type.
* @param instrumentedMethod The instrumented method.
* @param assigner The assigner to be used.
* @param typing Indicates if dynamic type castings should be attempted for incompatible assignments.
* @return A resolved version of this argument provider.
*/
Resolved resolve(TypeDescription instrumentedType,
MethodDescription instrumentedMethod,
Assigner assigner,
Assigner.Typing typing);
/**
* Prepares the instrumented type.
*
* @param instrumentedType The instrumented type.
* @return The prepared instrumented type.
*/
InstrumentedType prepare(InstrumentedType instrumentedType);
/**
* An argument provider that loads a reference to the intercepted instance and all arguments of
* the intercepted method.
*/
enum ForInterceptedMethodInstanceAndParameters implements ArgumentProvider {
/**
* The singleton instance.
*/
INSTANCE;
/**
* {@inheritDoc}
*/
public Resolved resolve(TypeDescription instrumentedType, MethodDescription instrumentedMethod, Assigner assigner, Assigner.Typing typing) {
return new Resolved.Simple(MethodVariableAccess.allArgumentsOf(instrumentedMethod).prependThisReference(),
instrumentedMethod.isStatic()
? instrumentedMethod.getParameters().asTypeList().asErasures()
: CompoundList.of(instrumentedMethod.getDeclaringType().asErasure(), instrumentedMethod.getParameters().asTypeList().asErasures()));
}
/**
* {@inheritDoc}
*/
public InstrumentedType prepare(InstrumentedType instrumentedType) {
return instrumentedType;
}
}
/**
* An argument provider that loads all arguments of the intercepted method.
*/
enum ForInterceptedMethodParameters implements ArgumentProvider {
/**
* The singleton instance.
*/
INSTANCE;
/**
* {@inheritDoc}
*/
public Resolved resolve(TypeDescription instrumentedType, MethodDescription instrumentedMethod, Assigner assigner, Assigner.Typing typing) {
return new Resolved.Simple(MethodVariableAccess.allArgumentsOf(instrumentedMethod),
instrumentedMethod.getParameters().asTypeList().asErasures());
}
/**
* {@inheritDoc}
*/
public InstrumentedType prepare(InstrumentedType instrumentedType) {
return instrumentedType;
}
}
/**
* Represents wrapper types and types that could be stored in a class's constant pool as such
* constant pool values.
*/
enum ConstantPoolWrapper {
/**
* Stores a {@link java.lang.Boolean} as a {@code boolean} and wraps it on load.
*/
BOOLEAN(boolean.class, Boolean.class) {
@Override
protected ArgumentProvider make(Object value) {
return new WrappingArgumentProvider(IntegerConstant.forValue((Boolean) value));
}
},
/**
* Stores a {@link java.lang.Byte} as a {@code byte} and wraps it on load.
*/
BYTE(byte.class, Byte.class) {
@Override
protected ArgumentProvider make(Object value) {
return new WrappingArgumentProvider(IntegerConstant.forValue((Byte) value));
}
},
/**
* Stores a {@link java.lang.Short} as a {@code short} and wraps it on load.
*/
SHORT(short.class, Short.class) {
@Override
protected ArgumentProvider make(Object value) {
return new WrappingArgumentProvider(IntegerConstant.forValue((Short) value));
}
},
/**
* Stores a {@link java.lang.Character} as a {@code char} and wraps it on load.
*/
CHARACTER(char.class, Character.class) {
@Override
protected ArgumentProvider make(Object value) {
return new WrappingArgumentProvider(IntegerConstant.forValue((Character) value));
}
},
/**
* Stores a {@link java.lang.Integer} as a {@code int} and wraps it on load.
*/
INTEGER(int.class, Integer.class) {
@Override
protected ArgumentProvider make(Object value) {
return new WrappingArgumentProvider(IntegerConstant.forValue((Integer) value));
}
},
/**
* Stores a {@link java.lang.Long} as a {@code long} and wraps it on load.
*/
LONG(long.class, Long.class) {
@Override
protected ArgumentProvider make(Object value) {
return new WrappingArgumentProvider(LongConstant.forValue((Long) value));
}
},
/**
* Stores a {@link java.lang.Float} as a {@code float} and wraps it on load.
*/
FLOAT(float.class, Float.class) {
@Override
protected ArgumentProvider make(Object value) {
return new WrappingArgumentProvider(FloatConstant.forValue((Float) value));
}
},
/**
* Stores a {@link java.lang.Double} as a {@code double} and wraps it on load.
*/
DOUBLE(double.class, Double.class) {
@Override
protected ArgumentProvider make(Object value) {
return new WrappingArgumentProvider(DoubleConstant.forValue((Double) value));
}
};
/**
* The primitive type that can be stored on the constant pool.
*/
private final TypeDescription primitiveType;
/**
* The wrapper type that is to be represented.
*/
private final TypeDescription wrapperType;
/**
* Creates a new wrapper delegate for a primitive type.
*
* @param primitiveType The primitive type that can be stored on the constant pool.
* @param wrapperType The wrapper type that is to be represented.
*/
ConstantPoolWrapper(Class primitiveType, Class wrapperType) {
this.primitiveType = TypeDescription.ForLoadedType.of(primitiveType);
this.wrapperType = TypeDescription.ForLoadedType.of(wrapperType);
}
/**
* Represents the given value by a constant pool value or as a field if this is not possible.
*
* @param value The value to provide to the bootstrapped method.
* @return An argument provider for this value.
*/
public static ArgumentProvider of(Object value) {
if (value instanceof Boolean) {
return BOOLEAN.make(value);
} else if (value instanceof Byte) {
return BYTE.make(value);
} else if (value instanceof Short) {
return SHORT.make(value);
} else if (value instanceof Character) {
return CHARACTER.make(value);
} else if (value instanceof Integer) {
return INTEGER.make(value);
} else if (value instanceof Long) {
return LONG.make(value);
} else if (value instanceof Float) {
return FLOAT.make(value);
} else if (value instanceof Double) {
return DOUBLE.make(value);
} else if (value instanceof String) {
return new ForStringConstant((String) value);
} else if (value instanceof Class) {
return new ForClassConstant(TypeDescription.ForLoadedType.of((Class) value));
} else if (value instanceof TypeDescription) {
return new ForClassConstant((TypeDescription) value);
} else if (value instanceof Enum) {
return new ForEnumerationValue(new EnumerationDescription.ForLoadedEnumeration((Enum) value));
} else if (value instanceof EnumerationDescription) {
return new ForEnumerationValue((EnumerationDescription) value);
} else if (JavaType.METHOD_HANDLE.isInstance(value)) {
return new ForJavaConstant(JavaConstant.MethodHandle.ofLoaded(value));
} else if (JavaType.METHOD_TYPE.isInstance(value)) {
return new ForJavaConstant(JavaConstant.MethodType.ofLoaded(value));
} else if (value instanceof JavaConstant) {
return new ForJavaConstant((JavaConstant) value);
} else {
return ForInstance.of(value);
}
}
/**
* Creates an argument provider for a given primitive value.
*
* @param value The wrapper-type value to provide to the bootstrapped method.
* @return An argument provider for this value.
*/
protected abstract ArgumentProvider make(Object value);
/**
* An argument provider that loads a primitive value from the constant pool and wraps it.
*/
@HashCodeAndEqualsPlugin.Enhance(includeSyntheticFields = true)
protected class WrappingArgumentProvider implements ArgumentProvider {
/**
* The stack manipulation that represents the loading of the primitive value.
*/
private final StackManipulation stackManipulation;
/**
* Creates a new wrapping argument provider.
*
* @param stackManipulation The stack manipulation that represents the loading of the
* primitive value.
*/
protected WrappingArgumentProvider(StackManipulation stackManipulation) {
this.stackManipulation = stackManipulation;
}
/**
* {@inheritDoc}
*/
public Resolved resolve(TypeDescription instrumentedType, MethodDescription instrumentedMethod, Assigner assigner, Assigner.Typing typing) {
return new Resolved.Simple(new StackManipulation.Compound(stackManipulation,
assigner.assign(primitiveType.asGenericType(), wrapperType.asGenericType(), typing)), wrapperType);
}
/**
* {@inheritDoc}
*/
public InstrumentedType prepare(InstrumentedType instrumentedType) {
return instrumentedType;
}
}
}
/**
* A resolved {@link net.bytebuddy.implementation.InvokeDynamic.InvocationProvider.ArgumentProvider}.
*/
interface Resolved {
/**
* Returns a stack manipulation that loads the arguments onto the operand stack.
*
* @return A stack manipulation that loads the arguments onto the operand stack.
*/
StackManipulation getLoadInstruction();
/**
* Returns a list of all types of the arguments that were loaded onto the operand stack.
*
* @return A list of all types of the arguments that were loaded onto the operand stack.
*/
List getLoadedTypes();
/**
* A simple implementation of a resolved argument provider.
*/
@HashCodeAndEqualsPlugin.Enhance
class Simple implements Resolved {
/**
* A stack manipulation that loads the arguments onto the operand stack.
*/
private final StackManipulation stackManipulation;
/**
* A list of all types of the arguments that were loaded onto the operand stack.
*/
private final List loadedTypes;
/**
* Creates a simple resolved argument provider.
*
* @param stackManipulation A stack manipulation that loads the argument onto the operand stack.
* @param loadedType The type of the arguments that is loaded onto the operand stack.
*/
public Simple(StackManipulation stackManipulation, TypeDescription loadedType) {
this(stackManipulation, Collections.singletonList(loadedType));
}
/**
* Creates a simple resolved argument provider.
*
* @param stackManipulation A stack manipulation that loads the arguments onto the operand stack.
* @param loadedTypes A list of all types of the arguments that were loaded onto the
* operand stack.
*/
public Simple(StackManipulation stackManipulation, List loadedTypes) {
this.stackManipulation = stackManipulation;
this.loadedTypes = loadedTypes;
}
/**
* {@inheritDoc}
*/
public StackManipulation getLoadInstruction() {
return stackManipulation;
}
/**
* {@inheritDoc}
*/
public List getLoadedTypes() {
return loadedTypes;
}
}
}
/**
* An argument provider that loads the intercepted instance.
*/
@HashCodeAndEqualsPlugin.Enhance
class ForThisInstance implements ArgumentProvider {
/**
* The type as which the intercepted instance should be loaded onto the operand stack.
*/
private final TypeDescription typeDescription;
/**
* Creates a new argument provider for the instance of the instrumented type.
*
* @param typeDescription The type as which the instrumented type should be loaded onto the operand stack.
*/
protected ForThisInstance(TypeDescription typeDescription) {
this.typeDescription = typeDescription;
}
/**
* {@inheritDoc}
*/
public Resolved resolve(TypeDescription instrumentedType, MethodDescription instrumentedMethod, Assigner assigner, Assigner.Typing typing) {
if (instrumentedMethod.isStatic()) {
throw new IllegalStateException("Cannot get this instance from static method: " + instrumentedMethod);
} else if (!instrumentedType.isAssignableTo(typeDescription)) {
throw new IllegalStateException(instrumentedType + " is not assignable to " + instrumentedType);
}
return new Resolved.Simple(MethodVariableAccess.loadThis(), typeDescription);
}
/**
* {@inheritDoc}
*/
public InstrumentedType prepare(InstrumentedType instrumentedType) {
return instrumentedType;
}
}
/**
* An argument provider for a value that is stored in a randomly named static field.
*/
@HashCodeAndEqualsPlugin.Enhance
class ForInstance implements ArgumentProvider {
/**
* The prefix of any field generated by this argument provider.
*/
private static final String FIELD_PREFIX = "invokeDynamic";
/**
* The value that is stored in the static field.
*/
private final Object value;
/**
* The type of the static field.
*/
private final TypeDescription fieldType;
/**
* The name of the field.
*/
@HashCodeAndEqualsPlugin.ValueHandling(HashCodeAndEqualsPlugin.ValueHandling.Sort.IGNORE)
private final String name;
/**
* Creates a new argument provider that stores the given value in a static field.
*
* @param value The value that is to be provided to the bootstrapped method.
* @param fieldType The type of the field which is also provided to the bootstrap method.
*/
protected ForInstance(Object value, TypeDescription fieldType) {
this.value = value;
this.fieldType = fieldType;
name = FIELD_PREFIX + "$" + RandomString.hashOf(value);
}
/**
* Creates a new argument provider that stores the given value in a static field of the instance type.
*
* @param value The value that is to be provided to the bootstrapped method.
* @return A corresponding argument provider.
*/
protected static ArgumentProvider of(Object value) {
return new ForInstance(value, TypeDescription.ForLoadedType.of(value.getClass()));
}
/**
* {@inheritDoc}
*/
public Resolved resolve(TypeDescription instrumentedType, MethodDescription instrumentedMethod, Assigner assigner, Assigner.Typing typing) {
FieldDescription fieldDescription = instrumentedType.getDeclaredFields().filter(named(name)).getOnly();
StackManipulation stackManipulation = assigner.assign(fieldDescription.getType(), fieldType.asGenericType(), typing);
if (!stackManipulation.isValid()) {
throw new IllegalStateException("Cannot assign " + fieldDescription + " to " + fieldType);
}
return new Resolved.Simple(new StackManipulation.Compound(FieldAccess.forField(fieldDescription).read(),
stackManipulation), fieldDescription.getType().asErasure());
}
/**
* {@inheritDoc}
*/
public InstrumentedType prepare(InstrumentedType instrumentedType) {
return instrumentedType.withAuxiliaryField(new FieldDescription.Token(name,
Opcodes.ACC_PUBLIC | Opcodes.ACC_STATIC | Opcodes.ACC_VOLATILE | Opcodes.ACC_SYNTHETIC,
fieldType.asGenericType()), value);
}
}
/**
* Provides an argument from an existing field.
*/
@HashCodeAndEqualsPlugin.Enhance
class ForField implements ArgumentProvider {
/**
* The name of the field.
*/
protected final String fieldName;
/**
* The field locator factory to use.
*/
protected final FieldLocator.Factory fieldLocatorFactory;
/**
* Creates a new argument provider that loads the value of an existing field.
*
* @param fieldName The name of the field.
* @param fieldLocatorFactory The field locator factory to use.
*/
protected ForField(String fieldName, FieldLocator.Factory fieldLocatorFactory) {
this.fieldName = fieldName;
this.fieldLocatorFactory = fieldLocatorFactory;
}
/**
* {@inheritDoc}
*/
public Resolved resolve(TypeDescription instrumentedType, MethodDescription instrumentedMethod, Assigner assigner, Assigner.Typing typing) {
FieldLocator.Resolution resolution = fieldLocatorFactory.make(instrumentedType).locate(fieldName);
if (!resolution.isResolved()) {
throw new IllegalStateException("Cannot find a field " + fieldName + " for " + instrumentedType);
} else if (!resolution.getField().isStatic() && instrumentedMethod.isStatic()) {
throw new IllegalStateException("Cannot access non-static " + resolution.getField() + " from " + instrumentedMethod);
}
return doResolve(new StackManipulation.Compound(resolution.getField().isStatic()
? StackManipulation.Trivial.INSTANCE
: MethodVariableAccess.loadThis(), FieldAccess.forField(resolution.getField()).read()),
resolution.getField().getType(),
assigner,
typing);
}
/**
* Resolves this argument provider.
*
* @param access The stack manipulation for accessing the argument value.
* @param type The type of the loaded value.
* @param assigner The assigner to use.
* @param typing The typing required.
* @return A resolved version of this arguments provider.
*/
protected Resolved doResolve(StackManipulation access, TypeDescription.Generic type, Assigner assigner, Assigner.Typing typing) {
return new Resolved.Simple(access, type.asErasure());
}
/**
* {@inheritDoc}
*/
public InstrumentedType prepare(InstrumentedType instrumentedType) {
return instrumentedType;
}
/**
* An argument provider for a field value with an explicit type.
*/
@HashCodeAndEqualsPlugin.Enhance
protected static class WithExplicitType extends ForField {
/**
* The explicit type.
*/
private final TypeDescription typeDescription;
/**
* Creates an argument provider for a field value with an explicit type.
*
* @param fieldName The name of the field.
* @param fieldLocatorFactory The field locator factory to use.
* @param typeDescription The explicit type.
*/
protected WithExplicitType(String fieldName, FieldLocator.Factory fieldLocatorFactory, TypeDescription typeDescription) {
super(fieldName, fieldLocatorFactory);
this.typeDescription = typeDescription;
}
/**
* {@inheritDoc}
*/
protected Resolved doResolve(StackManipulation access, TypeDescription.Generic typeDescription, Assigner assigner, Assigner.Typing typing) {
StackManipulation stackManipulation = assigner.assign(typeDescription, this.typeDescription.asGenericType(), typing);
if (!stackManipulation.isValid()) {
throw new IllegalStateException("Cannot assign " + typeDescription + " to " + this.typeDescription);
}
return new Resolved.Simple(new StackManipulation.Compound(access, stackManipulation), this.typeDescription);
}
}
}
/**
* An argument provider that loads an argument of the intercepted method.
*/
@HashCodeAndEqualsPlugin.Enhance
class ForMethodParameter implements ArgumentProvider {
/**
* The index of the parameter.
*/
protected final int index;
/**
* Creates an argument provider for an argument of the intercepted method.
*
* @param index The index of the parameter.
*/
protected ForMethodParameter(int index) {
this.index = index;
}
/**
* {@inheritDoc}
*/
public Resolved resolve(TypeDescription instrumentedType, MethodDescription instrumentedMethod, Assigner assigner, Assigner.Typing typing) {
ParameterList parameters = instrumentedMethod.getParameters();
if (index >= parameters.size()) {
throw new IllegalStateException("No parameter " + index + " for " + instrumentedMethod);
}
return doResolve(MethodVariableAccess.load(parameters.get(index)), parameters.get(index).getType(), assigner, typing);
}
/**
* Resolves this argument provider.
*
* @param access The stack manipulation for accessing the argument value.
* @param type The type of the loaded value.
* @param assigner The assigner to use.
* @param typing The typing required.
* @return A resolved version of this arguments provider.
*/
protected Resolved doResolve(StackManipulation access, TypeDescription.Generic type, Assigner assigner, Assigner.Typing typing) {
return new Resolved.Simple(access, type.asErasure());
}
/**
* {@inheritDoc}
*/
public InstrumentedType prepare(InstrumentedType instrumentedType) {
return instrumentedType;
}
/**
* An argument provider for a method parameter with an explicit type.
*/
@HashCodeAndEqualsPlugin.Enhance
protected static class WithExplicitType extends ForMethodParameter {
/**
* The explicit type.
*/
private final TypeDescription typeDescription;
/**
* Creates a new argument provider for a method parameter with an explicit type.
*
* @param index The index of the parameter.
* @param typeDescription The explicit type.
*/
protected WithExplicitType(int index, TypeDescription typeDescription) {
super(index);
this.typeDescription = typeDescription;
}
/**
* {@inheritDoc}
*/
protected Resolved doResolve(StackManipulation access, TypeDescription.Generic type, Assigner assigner, Assigner.Typing typing) {
StackManipulation stackManipulation = assigner.assign(type, typeDescription.asGenericType(), typing);
if (!stackManipulation.isValid()) {
throw new IllegalStateException("Cannot assign " + type + " to " + typeDescription);
}
return new Resolved.Simple(new StackManipulation.Compound(access, stackManipulation), typeDescription);
}
}
}
/**
* An argument provider for a {@code boolean} value.
*/
@HashCodeAndEqualsPlugin.Enhance
class ForBooleanConstant implements ArgumentProvider {
/**
* The represented {@code boolean} value.
*/
private final boolean value;
/**
* Creates a new argument provider for a {@code boolean} value.
*
* @param value The represented {@code boolean} value.
*/
protected ForBooleanConstant(boolean value) {
this.value = value;
}
/**
* {@inheritDoc}
*/
public Resolved resolve(TypeDescription instrumentedType, MethodDescription instrumentedMethod, Assigner assigner, Assigner.Typing typing) {
return new Resolved.Simple(IntegerConstant.forValue(value), TypeDescription.ForLoadedType.of(boolean.class));
}
/**
* {@inheritDoc}
*/
public InstrumentedType prepare(InstrumentedType instrumentedType) {
return instrumentedType;
}
}
/**
* An argument provider for a {@code byte} value.
*/
@HashCodeAndEqualsPlugin.Enhance
class ForByteConstant implements ArgumentProvider {
/**
* The represented {@code byte} value.
*/
private final byte value;
/**
* Creates a new argument provider for a {@code byte} value.
*
* @param value The represented {@code byte} value.
*/
protected ForByteConstant(byte value) {
this.value = value;
}
/**
* {@inheritDoc}
*/
public Resolved resolve(TypeDescription instrumentedType, MethodDescription instrumentedMethod, Assigner assigner, Assigner.Typing typing) {
return new Resolved.Simple(IntegerConstant.forValue(value), TypeDescription.ForLoadedType.of(byte.class));
}
/**
* {@inheritDoc}
*/
public InstrumentedType prepare(InstrumentedType instrumentedType) {
return instrumentedType;
}
}
/**
* An argument provider for a {@code short} value.
*/
@HashCodeAndEqualsPlugin.Enhance
class ForShortConstant implements ArgumentProvider {
/**
* The represented {@code short} value.
*/
private final short value;
/**
* Creates a new argument provider for a {@code short} value.
*
* @param value The represented {@code short} value.
*/
protected ForShortConstant(short value) {
this.value = value;
}
/**
* {@inheritDoc}
*/
public Resolved resolve(TypeDescription instrumentedType, MethodDescription instrumentedMethod, Assigner assigner, Assigner.Typing typing) {
return new Resolved.Simple(IntegerConstant.forValue(value), TypeDescription.ForLoadedType.of(short.class));
}
/**
* {@inheritDoc}
*/
public InstrumentedType prepare(InstrumentedType instrumentedType) {
return instrumentedType;
}
}
/**
* An argument provider for a {@code char} value.
*/
@HashCodeAndEqualsPlugin.Enhance
class ForCharacterConstant implements ArgumentProvider {
/**
* The represented {@code char} value.
*/
private final char value;
/**
* Creates a new argument provider for a {@code char} value.
*
* @param value The represented {@code char} value.
*/
protected ForCharacterConstant(char value) {
this.value = value;
}
/**
* {@inheritDoc}
*/
public Resolved resolve(TypeDescription instrumentedType, MethodDescription instrumentedMethod, Assigner assigner, Assigner.Typing typing) {
return new Resolved.Simple(IntegerConstant.forValue(value), TypeDescription.ForLoadedType.of(char.class));
}
/**
* {@inheritDoc}
*/
public InstrumentedType prepare(InstrumentedType instrumentedType) {
return instrumentedType;
}
}
/**
* An argument provider for a {@code int} value.
*/
@HashCodeAndEqualsPlugin.Enhance
class ForIntegerConstant implements ArgumentProvider {
/**
* The represented {@code int} value.
*/
private final int value;
/**
* Creates a new argument provider for a {@code int} value.
*
* @param value The represented {@code int} value.
*/
protected ForIntegerConstant(int value) {
this.value = value;
}
/**
* {@inheritDoc}
*/
public Resolved resolve(TypeDescription instrumentedType, MethodDescription instrumentedMethod, Assigner assigner, Assigner.Typing typing) {
return new Resolved.Simple(IntegerConstant.forValue(value), TypeDescription.ForLoadedType.of(int.class));
}
/**
* {@inheritDoc}
*/
public InstrumentedType prepare(InstrumentedType instrumentedType) {
return instrumentedType;
}
}
/**
* An argument provider for a {@code long} value.
*/
@HashCodeAndEqualsPlugin.Enhance
class ForLongConstant implements ArgumentProvider {
/**
* The represented {@code long} value.
*/
private final long value;
/**
* Creates a new argument provider for a {@code long} value.
*
* @param value The represented {@code long} value.
*/
protected ForLongConstant(long value) {
this.value = value;
}
/**
* {@inheritDoc}
*/
public Resolved resolve(TypeDescription instrumentedType, MethodDescription instrumentedMethod, Assigner assigner, Assigner.Typing typing) {
return new Resolved.Simple(LongConstant.forValue(value), TypeDescription.ForLoadedType.of(long.class));
}
/**
* {@inheritDoc}
*/
public InstrumentedType prepare(InstrumentedType instrumentedType) {
return instrumentedType;
}
}
/**
* An argument provider for a {@code float} value.
*/
@HashCodeAndEqualsPlugin.Enhance
class ForFloatConstant implements ArgumentProvider {
/**
* The represented {@code float} value.
*/
private final float value;
/**
* Creates a new argument provider for a {@code float} value.
*
* @param value The represented {@code float} value.
*/
protected ForFloatConstant(float value) {
this.value = value;
}
/**
* {@inheritDoc}
*/
public Resolved resolve(TypeDescription instrumentedType, MethodDescription instrumentedMethod, Assigner assigner, Assigner.Typing typing) {
return new Resolved.Simple(FloatConstant.forValue(value), TypeDescription.ForLoadedType.of(float.class));
}
/**
* {@inheritDoc}
*/
public InstrumentedType prepare(InstrumentedType instrumentedType) {
return instrumentedType;
}
}
/**
* An argument provider for a {@code double} value.
*/
@HashCodeAndEqualsPlugin.Enhance
class ForDoubleConstant implements ArgumentProvider {
/**
* The represented {@code double} value.
*/
private final double value;
/**
* Creates a new argument provider for a {@code double} value.
*
* @param value The represented {@code double} value.
*/
protected ForDoubleConstant(double value) {
this.value = value;
}
/**
* {@inheritDoc}
*/
public Resolved resolve(TypeDescription instrumentedType, MethodDescription instrumentedMethod, Assigner assigner, Assigner.Typing typing) {
return new Resolved.Simple(DoubleConstant.forValue(value), TypeDescription.ForLoadedType.of(double.class));
}
/**
* {@inheritDoc}
*/
public InstrumentedType prepare(InstrumentedType instrumentedType) {
return instrumentedType;
}
}
/**
* An argument provider for a {@link java.lang.String} value.
*/
@HashCodeAndEqualsPlugin.Enhance
class ForStringConstant implements ArgumentProvider {
/**
* The represented {@link java.lang.String} value.
*/
private final String value;
/**
* Creates a new argument provider for a {@link java.lang.String} value.
*
* @param value The represented {@link java.lang.String} value.
*/
protected ForStringConstant(String value) {
this.value = value;
}
/**
* {@inheritDoc}
*/
public Resolved resolve(TypeDescription instrumentedType, MethodDescription instrumentedMethod, Assigner assigner, Assigner.Typing typing) {
return new Resolved.Simple(new TextConstant(value), TypeDescription.ForLoadedType.of(String.class));
}
/**
* {@inheritDoc}
*/
public InstrumentedType prepare(InstrumentedType instrumentedType) {
return instrumentedType;
}
}
/**
* An argument provider for a {@link java.lang.Class} constant.
*/
@HashCodeAndEqualsPlugin.Enhance
class ForClassConstant implements ArgumentProvider {
/**
* The type that is represented by this constant.
*/
private final TypeDescription typeDescription;
/**
* Creates a new argument provider for the given type description.
*
* @param typeDescription The type to represent.
*/
protected ForClassConstant(TypeDescription typeDescription) {
this.typeDescription = typeDescription;
}
/**
* {@inheritDoc}
*/
public Resolved resolve(TypeDescription instrumentedType, MethodDescription instrumentedMethod, Assigner assigner, Assigner.Typing typing) {
return new Resolved.Simple(ClassConstant.of(typeDescription), TypeDescription.ForLoadedType.of(Class.class));
}
/**
* {@inheritDoc}
*/
public InstrumentedType prepare(InstrumentedType instrumentedType) {
return instrumentedType;
}
}
/**
* An argument provider for an {@link java.lang.Enum} constant.
*/
@HashCodeAndEqualsPlugin.Enhance
class ForEnumerationValue implements ArgumentProvider {
/**
* A description of the enumeration to represent.
*/
private final EnumerationDescription enumerationDescription;
/**
* Creates a new argument provider for an enumeration value.
*
* @param enumerationDescription A description of the enumeration to represent.
*/
protected ForEnumerationValue(EnumerationDescription enumerationDescription) {
this.enumerationDescription = enumerationDescription;
}
/**
* {@inheritDoc}
*/
public Resolved resolve(TypeDescription instrumentedType, MethodDescription instrumentedMethod, Assigner assigner, Assigner.Typing typing) {
return new Resolved.Simple(FieldAccess.forEnumeration(enumerationDescription), enumerationDescription.getEnumerationType());
}
/**
* {@inheritDoc}
*/
public InstrumentedType prepare(InstrumentedType instrumentedType) {
return instrumentedType;
}
}
/**
* An argument provider for the {@code null} value.
*/
@HashCodeAndEqualsPlugin.Enhance
class ForNullValue implements ArgumentProvider {
/**
* The type to be represented by the {@code null} value.
*/
private final TypeDescription typeDescription;
/**
* Creates a new argument provider for the {@code null} value.
*
* @param typeDescription The type to be represented by the {@code null} value.
*/
protected ForNullValue(TypeDescription typeDescription) {
this.typeDescription = typeDescription;
}
/**
* {@inheritDoc}
*/
public Resolved resolve(TypeDescription instrumentedType, MethodDescription instrumentedMethod, Assigner assigner, Assigner.Typing typing) {
return new Resolved.Simple(NullConstant.INSTANCE, typeDescription);
}
/**
* {@inheritDoc}
*/
public InstrumentedType prepare(InstrumentedType instrumentedType) {
return instrumentedType;
}
}
/**
* An argument provider for a Java instance.
*/
@HashCodeAndEqualsPlugin.Enhance
class ForJavaConstant implements ArgumentProvider {
/**
* The Java instance to provide to the bootstrapped method.
*/
private final ConstantValue constant;
/**
* Creates a new argument provider for the given Java instance.
*
* @param constant The Java instance to provide to the bootstrapped method.
*/
protected ForJavaConstant(ConstantValue constant) {
this.constant = constant;
}
/**
* {@inheritDoc}
*/
public Resolved resolve(TypeDescription instrumentedType, MethodDescription instrumentedMethod, Assigner assigner, Assigner.Typing typing) {
return new Resolved.Simple(constant.toStackManipulation(), constant.getTypeDescription());
}
/**
* {@inheritDoc}
*/
public InstrumentedType prepare(InstrumentedType instrumentedType) {
return instrumentedType;
}
}
}
/**
* Provides the name of the method that is to be bound by a dynamic method call.
*/
interface NameProvider {
/**
* Resolves the name given the intercepted method.
*
* @param methodDescription The intercepted method.
* @return The name of the method to be bound by the bootstrap method.
*/
String resolve(MethodDescription methodDescription);
/**
* A name provider that provides the name of the intercepted method.
*/
enum ForInterceptedMethod implements NameProvider {
/**
* The singleton instance.
*/
INSTANCE;
/**
* {@inheritDoc}
*/
public String resolve(MethodDescription methodDescription) {
return methodDescription.getInternalName();
}
}
/**
* A name provider that provides an explicit name.
*/
@HashCodeAndEqualsPlugin.Enhance
class ForExplicitName implements NameProvider {
/**
* The name to be provided.
*/
private final String internalName;
/**
* Creates a new name provider for an explicit name.
*
* @param internalName The name to be provided.
*/
protected ForExplicitName(String internalName) {
this.internalName = internalName;
}
/**
* {@inheritDoc}
*/
public String resolve(MethodDescription methodDescription) {
return internalName;
}
}
}
/**
* Provides the return type that is requested from the bootstrap method.
*/
interface ReturnTypeProvider {
/**
* Resolves the return type that is requested from the bootstrap method.
*
* @param methodDescription The intercepted method.
* @return The return type that is requested from the bootstrap method.
*/
TypeDescription resolve(MethodDescription methodDescription);
/**
* Requests the return type of the intercepted method.
*/
enum ForInterceptedMethod implements ReturnTypeProvider {
/**
* The singleton instance.
*/
INSTANCE;
/**
* {@inheritDoc}
*/
public TypeDescription resolve(MethodDescription methodDescription) {
return methodDescription.getReturnType().asErasure();
}
}
/**
* Requests an explicit return type.
*/
@HashCodeAndEqualsPlugin.Enhance
class ForExplicitType implements ReturnTypeProvider {
/**
* The requested return type.
*/
private final TypeDescription typeDescription;
/**
* Creates a new return type provider for an explicit return type.
*
* @param typeDescription The requested return type.
*/
protected ForExplicitType(TypeDescription typeDescription) {
this.typeDescription = typeDescription;
}
/**
* {@inheritDoc}
*/
public TypeDescription resolve(MethodDescription methodDescription) {
return typeDescription;
}
}
}
/**
* An invocation provider that requests a synthetic dynamic invocation where all arguments are explicitly
* provided by the user.
*/
@HashCodeAndEqualsPlugin.Enhance
class Default implements InvocationProvider {
/**
* The provider for the name of the intercepted method.
*/
private final NameProvider nameProvider;
/**
* The provider for the required return type.
*/
private final ReturnTypeProvider returnTypeProvider;
/**
* The providers for the method arguments in their order.
*/
private final List argumentProviders;
/**
* Creates a new default invocation provider that provides information and arguments of the
* intercepted method.
*/
protected Default() {
this(NameProvider.ForInterceptedMethod.INSTANCE,
ReturnTypeProvider.ForInterceptedMethod.INSTANCE,
Collections.singletonList(ArgumentProvider.ForInterceptedMethodInstanceAndParameters.INSTANCE));
}
/**
* Creates a new default invocation provider.
*
* @param nameProvider The provider for the name of the intercepted method.
* @param returnTypeProvider The provider for the required return type.
* @param argumentProviders The providers for the method arguments in their order.
*/
protected Default(NameProvider nameProvider,
ReturnTypeProvider returnTypeProvider,
List argumentProviders) {
this.nameProvider = nameProvider;
this.returnTypeProvider = returnTypeProvider;
this.argumentProviders = argumentProviders;
}
/**
* {@inheritDoc}
*/
public Target make(MethodDescription methodDescription) {
return new Target(nameProvider.resolve(methodDescription),
returnTypeProvider.resolve(methodDescription),
argumentProviders,
methodDescription);
}
/**
* {@inheritDoc}
*/
public InvocationProvider appendArguments(List argumentProviders) {
return new Default(nameProvider,
returnTypeProvider,
CompoundList.of(this.argumentProviders, argumentProviders));
}
/**
* {@inheritDoc}
*/
public InvocationProvider appendArgument(ArgumentProvider argumentProvider) {
return new Default(nameProvider,
returnTypeProvider,
CompoundList.of(this.argumentProviders, argumentProvider));
}
/**
* {@inheritDoc}
*/
public InvocationProvider withoutArguments() {
return new Default(nameProvider,
returnTypeProvider,
Collections.emptyList());
}
/**
* {@inheritDoc}
*/
public InvocationProvider withNameProvider(NameProvider nameProvider) {
return new Default(nameProvider,
returnTypeProvider,
argumentProviders);
}
/**
* {@inheritDoc}
*/
public InvocationProvider withReturnTypeProvider(ReturnTypeProvider returnTypeProvider) {
return new Default(nameProvider,
returnTypeProvider,
argumentProviders);
}
/**
* {@inheritDoc}
*/
public InstrumentedType prepare(InstrumentedType instrumentedType) {
for (ArgumentProvider argumentProvider : argumentProviders) {
instrumentedType = argumentProvider.prepare(instrumentedType);
}
return instrumentedType;
}
/**
* A target for a synthetically bound method call.
*/
@HashCodeAndEqualsPlugin.Enhance
protected static class Target implements InvocationProvider.Target {
/**
* The name to be passed to the bootstrap method.
*/
private final String internalName;
/**
* The return type to be requested from the bootstrapping method.
*/
private final TypeDescription returnType;
/**
* The arguments to be passed to the bootstrap method.
*/
private final List argumentProviders;
/**
* The intercepted method.
*/
private final MethodDescription instrumentedMethod;
/**
* Creates a new target.
*
* @param internalName The name to be passed to the bootstrap method.
* @param returnType The return type to be requested from the bootstrapping method.
* @param argumentProviders The arguments to be passed to the bootstrap method.
* @param instrumentedMethod The intercepted method.
*/
protected Target(String internalName,
TypeDescription returnType,
List argumentProviders,
MethodDescription instrumentedMethod) {
this.internalName = internalName;
this.returnType = returnType;
this.argumentProviders = argumentProviders;
this.instrumentedMethod = instrumentedMethod;
}
/**
* {@inheritDoc}
*/
public InvocationProvider.Target.Resolved resolve(TypeDescription instrumentedType, Assigner assigner, Assigner.Typing typing) {
StackManipulation[] stackManipulation = new StackManipulation[argumentProviders.size()];
List parameterTypes = new ArrayList();
int index = 0;
for (ArgumentProvider argumentProvider : argumentProviders) {
ArgumentProvider.Resolved resolved = argumentProvider.resolve(instrumentedType, instrumentedMethod, assigner, typing);
parameterTypes.addAll(resolved.getLoadedTypes());
stackManipulation[index++] = resolved.getLoadInstruction();
}
return new Resolved.Simple(new StackManipulation.Compound(stackManipulation),
internalName,
returnType,
parameterTypes);
}
}
}
}
/**
* A termination handler is responsible to handle the return value of a method that is invoked via a
* {@link net.bytebuddy.implementation.InvokeDynamic}.
*/
protected enum TerminationHandler {
/**
* A termination handler that returns the bound method's return value.
*/
RETURNING {
@Override
protected StackManipulation resolve(MethodDescription interceptedMethod, TypeDescription returnType, Assigner assigner, Assigner.Typing typing) {
StackManipulation stackManipulation = assigner.assign(returnType.asGenericType(), interceptedMethod.getReturnType(), typing);
if (!stackManipulation.isValid()) {
throw new IllegalStateException("Cannot return " + returnType + " from " + interceptedMethod);
}
return new StackManipulation.Compound(stackManipulation, MethodReturn.of(interceptedMethod.getReturnType()));
}
},
/**
* A termination handler that drops the bound method's return value.
*/
DROPPING {
@Override
protected StackManipulation resolve(MethodDescription interceptedMethod, TypeDescription returnType, Assigner assigner, Assigner.Typing typing) {
return Removal.of(returnType);
}
};
/**
* Returns a stack manipulation that handles the method return.
*
* @param interceptedMethod The method being intercepted.
* @param returnType The return type of the instrumented method.
* @param assigner The assigner to use.
* @param typing Indicates if dynamic type castings should be attempted for incompatible assignments.
* @return A stack manipulation that handles the method return.
*/
protected abstract StackManipulation resolve(MethodDescription interceptedMethod,
TypeDescription returnType,
Assigner assigner,
Assigner.Typing typing);
}
/**
* An abstract delegator that allows to specify a configuration for any specification of an argument.
*/
protected abstract static class AbstractDelegator extends InvokeDynamic {
/**
* Creates a new abstract delegator for a dynamic method invocation.
*
* @param bootstrap The bootstrap method or constructor.
* @param arguments The arguments that are provided to the bootstrap method or constructor.
* @param invocationProvider The target provided that identifies the method to be bootstrapped.
* @param terminationHandler A handler that handles the method return.
* @param assigner The assigner to be used.
* @param typing Indicates if dynamic type castings should be attempted for incompatible assignments.
*/
protected AbstractDelegator(MethodDescription.InDefinedShape bootstrap,
List arguments,
InvocationProvider invocationProvider,
TerminationHandler terminationHandler,
Assigner assigner,
Assigner.Typing typing) {
super(bootstrap, arguments, invocationProvider, terminationHandler, assigner, typing);
}
/**
* Resolves the current configuration into a fully initialized invoke dynamic instance.
*
* @return The fully resolved invoke dynamic instance.
*/
protected abstract InvokeDynamic materialize();
/**
* {@inheritDoc}
*/
public InvokeDynamic withBooleanValue(boolean... value) {
return materialize().withBooleanValue(value);
}
/**
* {@inheritDoc}
*/
public InvokeDynamic withByteValue(byte... value) {
return materialize().withByteValue(value);
}
/**
* {@inheritDoc}
*/
public InvokeDynamic withShortValue(short... value) {
return materialize().withShortValue(value);
}
/**
* {@inheritDoc}
*/
public InvokeDynamic withCharacterValue(char... value) {
return materialize().withCharacterValue(value);
}
/**
* {@inheritDoc}
*/
public InvokeDynamic withIntegerValue(int... value) {
return materialize().withIntegerValue(value);
}
/**
* {@inheritDoc}
*/
public InvokeDynamic withLongValue(long... value) {
return materialize().withLongValue(value);
}
/**
* {@inheritDoc}
*/
public InvokeDynamic withFloatValue(float... value) {
return materialize().withFloatValue(value);
}
/**
* {@inheritDoc}
*/
public InvokeDynamic withDoubleValue(double... value) {
return materialize().withDoubleValue(value);
}
/**
* {@inheritDoc}
*/
public InvokeDynamic withValue(Object... value) {
return materialize().withValue(value);
}
/**
* {@inheritDoc}
*/
public WithImplicitType withReference(Object value) {
return materialize().withReference(value);
}
/**
* {@inheritDoc}
*/
public InvokeDynamic withReference(Object... value) {
return materialize().withReference(value);
}
/**
* {@inheritDoc}
*/
public InvokeDynamic withType(TypeDescription... typeDescription) {
return materialize().withType(typeDescription);
}
/**
* {@inheritDoc}
*/
public InvokeDynamic withInstance(JavaConstant... javaConstant) {
return materialize().withInstance(javaConstant);
}
/**
* {@inheritDoc}
*/
public InvokeDynamic withNullValue(Class... type) {
return materialize().withNullValue(type);
}
/**
* {@inheritDoc}
*/
public InvokeDynamic withNullValue(TypeDescription... typeDescription) {
return materialize().withNullValue(typeDescription);
}
/**
* {@inheritDoc}
*/
public InvokeDynamic withArgument(int... index) {
return materialize().withArgument(index);
}
/**
* {@inheritDoc}
*/
public WithImplicitType withArgument(int index) {
return materialize().withArgument(index);
}
/**
* {@inheritDoc}
*/
public InvokeDynamic withThis(Class... type) {
return materialize().withThis(type);
}
/**
* {@inheritDoc}
*/
public InvokeDynamic withThis(TypeDescription... typeDescription) {
return materialize().withThis(typeDescription);
}
/**
* {@inheritDoc}
*/
public InvokeDynamic withMethodArguments() {
return materialize().withMethodArguments();
}
/**
* {@inheritDoc}
*/
public InvokeDynamic withImplicitAndMethodArguments() {
return materialize().withImplicitAndMethodArguments();
}
/**
* {@inheritDoc}
*/
public InvokeDynamic withField(String... fieldName) {
return materialize().withField(fieldName);
}
/**
* {@inheritDoc}
*/
public InvokeDynamic withEnumeration(EnumerationDescription... enumerationDescription) {
return materialize().withEnumeration(enumerationDescription);
}
/**
* {@inheritDoc}
*/
public InvokeDynamic withField(FieldLocator.Factory fieldLocatorFactory, String... name) {
return materialize().withField(fieldLocatorFactory, name);
}
/**
* {@inheritDoc}
*/
public WithImplicitType withField(String name) {
return materialize().withField(name);
}
/**
* {@inheritDoc}
*/
public WithImplicitType withField(String name, FieldLocator.Factory fieldLocatorFactory) {
return materialize().withField(name, fieldLocatorFactory);
}
/**
* {@inheritDoc}
*/
public Composable withAssigner(Assigner assigner, Assigner.Typing typing) {
return materialize().withAssigner(assigner, typing);
}
/**
* {@inheritDoc}
*/
public Implementation andThen(Implementation implementation) {
return materialize().andThen(implementation);
}
/**
* {@inheritDoc}
*/
public InstrumentedType prepare(InstrumentedType instrumentedType) {
return materialize().prepare(instrumentedType);
}
/**
* {@inheritDoc}
*/
public ByteCodeAppender appender(Target implementationTarget) {
return materialize().appender(implementationTarget);
}
}
/**
* Representation of an {@link net.bytebuddy.implementation.InvokeDynamic} implementation where the bootstrapped
* method is passed a {@code this} reference, if available, and any arguments of the instrumented method.
*/
public static class WithImplicitArguments extends AbstractDelegator {
/**
* Creates a new dynamic method invocation with implicit arguments.
*
* @param bootstrap The bootstrap method or constructor.
* @param arguments The arguments that are provided to the bootstrap method or constructor.
* @param invocationProvider The target provided that identifies the method to be bootstrapped.
* @param terminationHandler A handler that handles the method return.
* @param assigner The assigner to be used.
* @param typing Indicates if dynamic type castings should be attempted for incompatible assignments.
*/
protected WithImplicitArguments(MethodDescription.InDefinedShape bootstrap,
List arguments,
InvocationProvider invocationProvider,
TerminationHandler terminationHandler,
Assigner assigner,
Assigner.Typing typing) {
super(bootstrap,
arguments,
invocationProvider,
terminationHandler,
assigner,
typing);
}
/**
* Returns an instance of this instrumentation where the bootstrapped method is not passed any arguments.
*
* @return This implementation where the bootstrapped method is not passed any arguments.
*/
public InvokeDynamic withoutArguments() {
return new InvokeDynamic(bootstrap,
arguments,
invocationProvider.withoutArguments(),
terminationHandler,
assigner,
typing);
}
@Override
protected InvokeDynamic materialize() {
return withoutArguments();
}
/**
* {@inheritDoc}
*/
public WithImplicitArguments withAssigner(Assigner assigner, Assigner.Typing typing) {
return new WithImplicitArguments(bootstrap,
arguments,
invocationProvider,
terminationHandler,
assigner,
typing);
}
}
/**
* Representation of an {@link net.bytebuddy.implementation.InvokeDynamic} implementation where the bootstrapped
* method is passed a {@code this} reference, if available, and any arguments of the instrumented method and
* where the invocation target is implicit.
*/
public static class WithImplicitTarget extends WithImplicitArguments {
/**
* Creates a new dynamic method invocation with implicit arguments and an implicit invocation target.
*
* @param bootstrap The bootstrap method or constructor.
* @param arguments The arguments that are provided to the bootstrap method.
* @param invocationProvider The target provided that identifies the method to be bootstrapped.
* @param terminationHandler A handler that handles the method return.
* @param assigner The assigner to be used.
* @param typing Indicates if dynamic type castings should be attempted for incompatible assignments.
*/
protected WithImplicitTarget(MethodDescription.InDefinedShape bootstrap,
List arguments,
InvocationProvider invocationProvider,
TerminationHandler terminationHandler,
Assigner assigner,
Assigner.Typing typing) {
super(bootstrap,
arguments,
invocationProvider,
terminationHandler,
assigner,
typing);
}
/**
* Requests the bootstrap method to bind a method with the given return type. The return type
* is assigned to the intercepted method's return type.
*
* @param returnType The return type to request from the bootstrapping method.
* @return This implementation where the bootstrap method is requested to bind a method with the given
* return type.
*/
public InvokeDynamic.WithImplicitArguments invoke(Class returnType) {
return invoke(TypeDescription.ForLoadedType.of(returnType));
}
/**
* Requests the bootstrap method to bind a method with the given return type. The return type
* is assigned to the intercepted method's return type.
*
* @param returnType The return type to request from the bootstrapping method.
* @return This implementation where the bootstrap method is requested to bind a method with the given
* return type.
*/
public InvokeDynamic.WithImplicitArguments invoke(TypeDescription returnType) {
return new WithImplicitArguments(bootstrap,
arguments,
invocationProvider.withReturnTypeProvider(new InvocationProvider.ReturnTypeProvider.ForExplicitType(returnType)),
terminationHandler,
assigner,
typing);
}
/**
* Requests the bootstrap method is passed the given method name.
*
* @param methodName The method name to pass to the bootstrapping method.
* @return This implementation where the bootstrap method is passed the given method name.
*/
public InvokeDynamic.WithImplicitArguments invoke(String methodName) {
return new WithImplicitArguments(bootstrap,
arguments,
invocationProvider.withNameProvider(new InvocationProvider.NameProvider.ForExplicitName(methodName)),
terminationHandler,
assigner,
typing);
}
/**
* Requests the bootstrap method to bind a method with the given return type. The return type
* is assigned to the intercepted method's return type. Also, the bootstrap method is passed the
* given method name.
*
* @param methodName The method name to pass to the bootstrapping method.
* @param returnType The return type to request from the bootstrapping method.
* @return This implementation where the bootstrap method is requested to bind a method with the given
* return type while being passed the given method name.
*/
public InvokeDynamic.WithImplicitArguments invoke(String methodName, Class returnType) {
return invoke(methodName, TypeDescription.ForLoadedType.of(returnType));
}
/**
* Requests the bootstrap method to bind a method with the given return type. The return type
* is assigned to the intercepted method's return type. Also, the bootstrap method is passed the
* given method name.
*
* @param methodName The method name to pass to the bootstrapping method.
* @param returnType The return type to request from the bootstrapping method.
* @return This implementation where the bootstrap method is requested to bind a method with the given
* return type while being passed the given method name.
*/
public InvokeDynamic.WithImplicitArguments invoke(String methodName, TypeDescription returnType) {
return new WithImplicitArguments(bootstrap,
arguments,
invocationProvider
.withNameProvider(new InvocationProvider.NameProvider.ForExplicitName(methodName))
.withReturnTypeProvider(new InvocationProvider.ReturnTypeProvider.ForExplicitType(returnType)),
terminationHandler,
assigner,
typing);
}
}
/**
* An {@link InvokeDynamic} invocation where the last argument is assigned its implicit type.
*/
public abstract static class WithImplicitType extends AbstractDelegator {
/**
* Creates a new abstract delegator for a dynamic method invocation where the last argument is assigned an implicit type.
*
* @param bootstrap The bootstrap method or constructor.
* @param arguments The arguments that are provided to the bootstrap method or constructor.
* @param invocationProvider The target provided that identifies the method to be bootstrapped.
* @param terminationHandler A handler that handles the method return.
* @param assigner The assigner to be used.
* @param typing Indicates if dynamic type castings should be attempted for incompatible assignments.
*/
protected WithImplicitType(MethodDescription.InDefinedShape bootstrap,
List arguments,
InvocationProvider invocationProvider,
TerminationHandler terminationHandler,
Assigner assigner,
Assigner.Typing typing) {
super(bootstrap, arguments, invocationProvider, terminationHandler, assigner, typing);
}
/**
* Represents the last value as an instance of the given type.
*
* @param type The type to represent to the dynamic method invocation.
* @return A new dynamic method invocation where the last argument is represented by the given type.
*/
public InvokeDynamic as(Class type) {
return as(TypeDescription.ForLoadedType.of(type));
}
/**
* Represents the last value as an instance of the given type.
*
* @param typeDescription The type to represent to the dynamic method invocation.
* @return A new dynamic method invocation where the last argument is represented by the given type.
*/
public abstract InvokeDynamic as(TypeDescription typeDescription);
/**
* A step in the invoke dynamic domain specific language that allows to explicitly specify a field type for a reference value.
*/
@SuppressFBWarnings(value = "EQ_DOESNT_OVERRIDE_EQUALS", justification = "Super type implementation covers use case")
protected static class OfInstance extends WithImplicitType {
/**
* The value that is supplied as the next argument to the bootstrapped method.
*/
private final Object value;
/**
* An argument provider that represents the argument with an implicit type.
*/
private final InvocationProvider.ArgumentProvider argumentProvider;
/**
* Creates a new invoke dynamic instance with an implicit field type for the provided value.
*
* @param bootstrap The bootstrap method or constructor.
* @param arguments The arguments that are provided to the bootstrap method or constructor.
* @param invocationProvider The target provided that identifies the method to be bootstrapped.
* @param terminationHandler A handler that handles the method return.
* @param assigner The assigner to be used.
* @param typing Indicates if dynamic type castings should be attempted for incompatible assignments.
* @param value The value that is supplied as the next argument to the bootstrapped method.
*/
protected OfInstance(MethodDescription.InDefinedShape bootstrap,
List arguments,
InvocationProvider invocationProvider,
TerminationHandler terminationHandler,
Assigner assigner,
Assigner.Typing typing,
Object value) {
super(bootstrap, arguments, invocationProvider, terminationHandler, assigner, typing);
this.value = value;
this.argumentProvider = InvocationProvider.ArgumentProvider.ForInstance.of(value);
}
@Override
public InvokeDynamic as(TypeDescription typeDescription) {
if (!typeDescription.asBoxed().isInstance(value)) {
throw new IllegalArgumentException(value + " is not of type " + typeDescription);
}
return new InvokeDynamic(bootstrap,
arguments,
invocationProvider.appendArgument(new InvocationProvider.ArgumentProvider.ForInstance(value, typeDescription)),
terminationHandler,
assigner,
typing);
}
@Override
protected InvokeDynamic materialize() {
return new InvokeDynamic(bootstrap,
arguments,
invocationProvider.appendArgument(argumentProvider),
terminationHandler,
assigner,
typing);
}
}
/**
* An invoke dynamic implementation where the last argument is an implicitly typed method argument.
*/
@SuppressFBWarnings(value = "EQ_DOESNT_OVERRIDE_EQUALS", justification = "Super type implementation covers use case")
protected static class OfArgument extends WithImplicitType {
/**
* The index of the method argument.
*/
private final int index;
/**
* Creates a new invoke dynamic instance with an implicit field type for the provided value.
*
* @param bootstrap The bootstrap method or constructor.
* @param arguments The arguments that are provided to the bootstrap method or constructor.
* @param invocationProvider The target provided that identifies the method to be bootstrapped.
* @param terminationHandler A handler that handles the method return.
* @param assigner The assigner to be used.
* @param typing Indicates if dynamic type castings should be attempted for incompatible assignments.
* @param index The index of of the argument to supply to the bootstrapped method.
*/
protected OfArgument(MethodDescription.InDefinedShape bootstrap,
List arguments,
InvocationProvider invocationProvider,
TerminationHandler terminationHandler,
Assigner assigner,
Assigner.Typing typing,
int index) {
super(bootstrap, arguments, invocationProvider, terminationHandler, assigner, typing);
this.index = index;
}
@Override
public InvokeDynamic as(TypeDescription typeDescription) {
return new InvokeDynamic(bootstrap,
arguments,
invocationProvider.appendArgument(new InvocationProvider.ArgumentProvider.ForMethodParameter.WithExplicitType(index, typeDescription)),
terminationHandler,
assigner,
typing);
}
@Override
protected InvokeDynamic materialize() {
return new InvokeDynamic(bootstrap,
arguments,
invocationProvider.appendArgument(new InvocationProvider.ArgumentProvider.ForMethodParameter(index)),
terminationHandler,
assigner,
typing);
}
}
/**
* An invoke dynamic implementation where the last argument is an implicitly typed field value.
*/
@SuppressFBWarnings(value = "EQ_DOESNT_OVERRIDE_EQUALS", justification = "Super type implementation covers use case")
protected static class OfField extends WithImplicitType {
/**
* The field name.
*/
private final String fieldName;
/**
* The field locator factory to use.
*/
private final FieldLocator.Factory fieldLocatorFactory;
/**
* Creates a new abstract delegator for a dynamic method invocation where the last argument is assigned an implicit type.
*
* @param bootstrap The bootstrap method or constructor.
* @param arguments The arguments that are provided to the bootstrap method.
* @param invocationProvider The target provided that identifies the method to be bootstrapped.
* @param terminationHandler A handler that handles the method return.
* @param assigner The assigner to be used.
* @param typing Indicates if dynamic type castings should be attempted for incompatible assignments.
* @param fieldName The field name.
* @param fieldLocatorFactory The field locator factory to use.
*/
protected OfField(MethodDescription.InDefinedShape bootstrap,
List arguments,
InvocationProvider invocationProvider,
TerminationHandler terminationHandler,
Assigner assigner,
Assigner.Typing typing,
String fieldName,
FieldLocator.Factory fieldLocatorFactory) {
super(bootstrap, arguments, invocationProvider, terminationHandler, assigner, typing);
this.fieldName = fieldName;
this.fieldLocatorFactory = fieldLocatorFactory;
}
@Override
public InvokeDynamic as(TypeDescription typeDescription) {
return new InvokeDynamic(bootstrap,
arguments,
invocationProvider.appendArgument(new InvocationProvider.ArgumentProvider.ForField.WithExplicitType(fieldName, fieldLocatorFactory, typeDescription)),
terminationHandler,
assigner,
typing);
}
@Override
protected InvokeDynamic materialize() {
return new InvokeDynamic(bootstrap,
arguments,
invocationProvider.appendArgument(new InvocationProvider.ArgumentProvider.ForField(fieldName, fieldLocatorFactory)),
terminationHandler,
assigner,
typing);
}
}
}
/**
* The byte code appender to be used by the {@link net.bytebuddy.implementation.InvokeDynamic} implementation.
*/
@HashCodeAndEqualsPlugin.Enhance(includeSyntheticFields = true)
protected class Appender implements ByteCodeAppender {
/**
* The instrumented type of the current implementation.
*/
private final TypeDescription instrumentedType;
/**
* Creates a new byte code appender for an invoke dynamic implementation.
*
* @param instrumentedType The instrumented type of the current implementation.
*/
public Appender(TypeDescription instrumentedType) {
this.instrumentedType = instrumentedType;
}
/**
* {@inheritDoc}
*/
public Size apply(MethodVisitor methodVisitor, Context implementationContext, MethodDescription instrumentedMethod) {
InvocationProvider.Target.Resolved target = invocationProvider.make(instrumentedMethod).resolve(instrumentedType, assigner, typing);
StackManipulation.Size size = new StackManipulation.Compound(
target.getStackManipulation(),
MethodInvocation.invoke(bootstrap).dynamic(target.getInternalName(),
target.getReturnType(),
target.getParameterTypes(),
arguments),
terminationHandler.resolve(instrumentedMethod, target.getReturnType(), assigner, typing)
).apply(methodVisitor, implementationContext);
return new Size(size.getMaximalSize(), instrumentedMethod.getStackSize());
}
}
}