com.fitbur.bytebuddy.description.method.MethodDescription Maven / Gradle / Ivy
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package com.fitbur.bytebuddy.description.method;
import com.fitbur.bytebuddy.description.ByteCodeElement;
import com.fitbur.bytebuddy.description.NamedElement;
import com.fitbur.bytebuddy.description.TypeVariableSource;
import com.fitbur.bytebuddy.description.annotation.AnnotationDescription;
import com.fitbur.bytebuddy.description.annotation.AnnotationList;
import com.fitbur.bytebuddy.description.enumeration.EnumerationDescription;
import com.fitbur.bytebuddy.description.type.TypeDefinition;
import com.fitbur.bytebuddy.description.type.TypeDescription;
import com.fitbur.bytebuddy.description.type.TypeList;
import com.fitbur.bytebuddy.description.type.TypeVariableToken;
import com.fitbur.bytebuddy.matcher.ElementMatcher;
import com.fitbur.bytebuddy.utility.JavaInstance;
import com.fitbur.bytebuddy.utility.JavaType;
import com.fitbur.bytebuddy.jar.asm.Opcodes;
import com.fitbur.bytebuddy.jar.asm.Type;
import com.fitbur.bytebuddy.jar.asm.signature.SignatureWriter;
import java.lang.annotation.Annotation;
import java.lang.reflect.Constructor;
import java.lang.reflect.GenericSignatureFormatError;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import static com.fitbur.bytebuddy.matcher.ElementMatchers.not;
import static com.fitbur.bytebuddy.matcher.ElementMatchers.ofSort;
/**
* Implementations of this interface describe a Java method, i.e. a method or a constructor. Implementations of this
* interface must provide meaningful {@code equal(Object)} and {@code hashCode()} implementations.
*/
public interface MethodDescription extends TypeVariableSource,
NamedElement.WithGenericName,
ByteCodeElement.TypeDependant {
/**
* The internal name of a Java constructor.
*/
String CONSTRUCTOR_INTERNAL_NAME = "";
/**
* The internal name of a Java static initializer.
*/
String TYPE_INITIALIZER_INTERNAL_NAME = "";
/**
* The type initializer of any representation of a type initializer.
*/
int TYPE_INITIALIZER_MODIFIER = Opcodes.ACC_STATIC | Opcodes.ACC_PRIVATE | Opcodes.ACC_SYNTHETIC;
/**
* Represents a non-defined default value of an annotation property.
*/
Object NO_DEFAULT_VALUE = null;
/**
* Represents any undefined property of a type description that is instead represented as {@code null} in order
* to resemble the Java reflection API which returns {@code null} and is intuitive to many Java developers.
*/
MethodDescription UNDEFINED = null;
/**
* Returns the return type of the described method.
*
* @return The return type of the described method.
*/
TypeDescription.Generic getReturnType();
/**
* Returns a list of this method's parameters.
*
* @return A list of this method's parameters.
*/
ParameterList getParameters();
/**
* Returns the exception types of the described method.
*
* @return The exception types of the described method.
*/
TypeList.Generic getExceptionTypes();
/**
* Returns this method's actual modifiers as it is present in a class file, i.e. includes a flag if this method
* is marked {@link Deprecated}.
*
* @return The method's actual modifiers.
*/
int getActualModifiers();
/**
* Returns this method's actual modifiers as it is present in a class file, i.e. includes a flag if this method
* is marked {@link Deprecated} and adjusts the modifiers for being abstract or not.
*
* @param nonAbstract {@code true} if the method should be treated as non-abstract.
* @return The method's actual modifiers.
*/
int getActualModifiers(boolean nonAbstract);
/**
* Checks if this method description represents a constructor.
*
* @return {@code true} if this method description represents a constructor.
*/
boolean isConstructor();
/**
* Checks if this method description represents a method, i.e. not a constructor or a type initializer.
*
* @return {@code true} if this method description represents a method.
*/
boolean isMethod();
/**
* Checks if this method is a type initializer.
*
* @return {@code true} if this method description represents a type initializer.
*/
boolean isTypeInitializer();
/**
* Verifies if a method description represents a given loaded method.
*
* @param method The method to be checked.
* @return {@code true} if this method description represents the given loaded method.
*/
boolean represents(Method method);
/**
* Verifies if a method description represents a given loaded constructor.
*
* @param constructor The constructor to be checked.
* @return {@code true} if this method description represents the given loaded constructor.
*/
boolean represents(Constructor constructor);
/**
* Verifies if this method describes a virtual method, i.e. a method that is inherited by a sub type of this type.
*
* @return {@code true} if this method is virtual.
*/
boolean isVirtual();
/**
* Returns the size of the local variable array that is required for this method, i.e. the size of all parameters
* if they were loaded on the stack including a reference to {@code this} if this method represented a non-static
* method.
*
* @return The size of this method on the operand stack.
*/
int getStackSize();
/**
* Checks if this method represents a default (defender) method.
*
* @return {@code true} if this method is a default method.
*/
boolean isDefaultMethod();
/**
* Checks if this method can be called using the {@code INVOKESPECIAL} for a given type.
*
* @param typeDescription The type o
* @return {@code true} if this method can be called using the {@code INVOKESPECIAL} instruction
* using the given type.
*/
boolean isSpecializableFor(TypeDescription typeDescription);
/**
* Returns the default value of this method or {@code null} if no such value exists. The returned values might be
* of a different type than usual:
*
* - {@link java.lang.Class} values are represented as
* {@link TypeDescription}s.
* - {@link java.lang.annotation.Annotation} values are represented as
* {@link AnnotationDescription}s
* - {@link java.lang.Enum} values are represented as
* {@link com.fitbur.bytebuddy.description.enumeration.EnumerationDescription}s.
* - Arrays of the latter types are represented as arrays of the named wrapper types.
*
*
* @return The default value of this method or {@code null}.
*/
Object getDefaultValue();
/**
* Returns the default value but casts it to the given type. If the type differs from the value, a
* {@link java.lang.ClassCastException} is thrown.
*
* @param type The type to cast the default value to.
* @param The type to cast the default value to.
* @return The casted default value.
*/
T getDefaultValue(Class type);
/**
* Asserts if this method is invokable on an instance of the given type, i.e. the method is an instance method or
* a constructor and the method is visible to the type and can be invoked on the given instance.
*
* @param typeDescription The type to check.
* @return {@code true} if this method is invokable on an instance of the given type.
*/
boolean isInvokableOn(TypeDescription typeDescription);
/**
* Checks if the method is a bootstrap method.
*
* @return {@code true} if the method is a bootstrap method.
*/
boolean isBootstrap();
/**
* Checks if the method is a bootstrap method that accepts the given arguments.
*
* @param arguments The arguments that the bootstrap method is expected to accept where primitive values
* are to be represented as their wrapper types, loaded types by {@link TypeDescription},
* method handles by {@link com.fitbur.bytebuddy.utility.JavaInstance.MethodHandle} instances and
* method types by {@link com.fitbur.bytebuddy.utility.JavaInstance.MethodType} instances.
* @return {@code true} if the method is a bootstrap method that accepts the given arguments.
*/
boolean isBootstrap(List arguments);
/**
* Checks if this method is capable of defining a default annotation value.
*
* @return {@code true} if it is possible to define a default annotation value for this method.
*/
boolean isDefaultValue();
/**
* Checks if the given value can describe a default annotation value for this method.
*
* @param value The value that describes the default annotation value for this method.
* @return {@code true} if the given value can describe a default annotation value for this method.
*/
boolean isDefaultValue(Object value);
/**
* Returns this methods receiver type. A receiver type is undefined for {@code static} methods
* where {@code null} is returned.
*
* @return This method's (annotated) receiver type.
*/
TypeDescription.Generic getReceiverType();
/**
* Returns a signature token representing this method.
*
* @return A signature token representing this method.
*/
SignatureToken asSignatureToken();
/**
* Returns a type token that represents this method's raw return and parameter types.
*
* @return A type token that represents this method's raw return and parameter types.
*/
TypeToken asTypeToken();
/**
* Represents a method description in its generic shape, i.e. in the shape it is defined by a generic or raw type.
*/
interface InGenericShape extends MethodDescription {
@Override
TypeDescription.Generic getDeclaringType();
@Override
ParameterList getParameters();
}
/**
* Represents a method in its defined shape, i.e. in the form it is defined by a class without its type variables being resolved.
*/
interface InDefinedShape extends MethodDescription {
@Override
TypeDescription getDeclaringType();
@Override
ParameterList getParameters();
/**
* An abstract base implementation of a method description in its defined shape.
*/
abstract class AbstractBase extends MethodDescription.AbstractBase implements InDefinedShape {
@Override
public InDefinedShape asDefined() {
return this;
}
@Override
public TypeDescription.Generic getReceiverType() {
if (isStatic()) {
return TypeDescription.Generic.UNDEFINED;
} else if (isConstructor()) {
TypeDescription declaringType = getDeclaringType(), enclosingDeclaringType = getDeclaringType().getEnclosingType();
return TypeDescription.Generic.OfParameterizedType.ForGenerifiedErasure.of(enclosingDeclaringType == null
? declaringType
: enclosingDeclaringType);
} else {
return TypeDescription.Generic.OfParameterizedType.ForGenerifiedErasure.of(getDeclaringType());
}
}
}
}
/**
* An abstract base implementation of a method description.
*/
abstract class AbstractBase extends TypeVariableSource.AbstractBase implements MethodDescription {
/**
* A merger of all method modifiers that are visible in the Java source code.
*/
private static final int SOURCE_MODIFIERS = Modifier.PUBLIC
| Modifier.PROTECTED
| Modifier.PRIVATE
| Modifier.ABSTRACT
| Modifier.STATIC
| Modifier.FINAL
| Modifier.SYNCHRONIZED
| Modifier.NATIVE;
@Override
public int getStackSize() {
return getParameters().asTypeList().getStackSize() + (isStatic() ? 0 : 1);
}
@Override
public boolean isMethod() {
return !isConstructor() && !isTypeInitializer();
}
@Override
public boolean isConstructor() {
return CONSTRUCTOR_INTERNAL_NAME.equals(getInternalName());
}
@Override
public boolean isTypeInitializer() {
return TYPE_INITIALIZER_INTERNAL_NAME.equals(getInternalName());
}
@Override
public boolean represents(Method method) {
return equals(new ForLoadedMethod(method));
}
@Override
public boolean represents(Constructor constructor) {
return equals(new ForLoadedConstructor(constructor));
}
@Override
public String getName() {
return isMethod()
? getInternalName()
: getDeclaringType().asErasure().getName();
}
@Override
public String getSourceCodeName() {
return isMethod()
? getName()
: EMPTY_NAME;
}
@Override
public String getDescriptor() {
StringBuilder descriptor = new StringBuilder("(");
for (TypeDescription parameterType : getParameters().asTypeList().asErasures()) {
descriptor.append(parameterType.getDescriptor());
}
return descriptor.append(")").append(getReturnType().asErasure().getDescriptor()).toString();
}
@Override
public String getGenericSignature() {
try {
SignatureWriter signatureWriter = new SignatureWriter();
boolean generic = false;
for (TypeDescription.Generic typeVariable : getTypeVariables()) {
signatureWriter.visitFormalTypeParameter(typeVariable.getSymbol());
boolean classBound = true;
for (TypeDescription.Generic upperBound : typeVariable.getUpperBounds()) {
upperBound.accept(new TypeDescription.Generic.Visitor.ForSignatureVisitor(classBound
? signatureWriter.visitClassBound()
: signatureWriter.visitInterfaceBound()));
classBound = false;
}
generic = true;
}
for (TypeDescription.Generic parameterType : getParameters().asTypeList()) {
parameterType.accept(new TypeDescription.Generic.Visitor.ForSignatureVisitor(signatureWriter.visitParameterType()));
generic = generic || !parameterType.getSort().isNonGeneric();
}
TypeDescription.Generic returnType = getReturnType();
returnType.accept(new TypeDescription.Generic.Visitor.ForSignatureVisitor(signatureWriter.visitReturnType()));
generic = generic || !returnType.getSort().isNonGeneric();
TypeList.Generic exceptionTypes = getExceptionTypes();
if (!exceptionTypes.filter(not(ofSort(TypeDefinition.Sort.NON_GENERIC))).isEmpty()) {
for (TypeDescription.Generic exceptionType : exceptionTypes) {
exceptionType.accept(new TypeDescription.Generic.Visitor.ForSignatureVisitor(signatureWriter.visitExceptionType()));
generic = generic || !exceptionType.getSort().isNonGeneric();
}
}
return generic
? signatureWriter.toString()
: NON_GENERIC_SIGNATURE;
} catch (GenericSignatureFormatError ignored) {
return NON_GENERIC_SIGNATURE;
}
}
@Override
public int getActualModifiers() {
return getActualModifiers(!isAbstract());
}
@Override
public int getActualModifiers(boolean nonAbstract) {
int actualModifiers = getModifiers() | (getDeclaredAnnotations().isAnnotationPresent(Deprecated.class)
? Opcodes.ACC_DEPRECATED
: EMPTY_MASK);
return nonAbstract
? actualModifiers & ~(Opcodes.ACC_ABSTRACT | Opcodes.ACC_NATIVE)
: actualModifiers & ~Opcodes.ACC_NATIVE | Opcodes.ACC_ABSTRACT;
}
@Override
public boolean isVisibleTo(TypeDescription typeDescription) {
return (isVirtual() || getDeclaringType().asErasure().isVisibleTo(typeDescription))
&& (isPublic()
|| typeDescription.equals(getDeclaringType())
|| (isProtected() && getDeclaringType().asErasure().isAssignableFrom(typeDescription))
|| (!isPrivate() && typeDescription.isSamePackage(getDeclaringType().asErasure())));
}
@Override
public boolean isVirtual() {
return !(isConstructor() || isPrivate() || isStatic() || isTypeInitializer());
}
@Override
public boolean isDefaultMethod() {
return !isAbstract() && !isBridge() && getDeclaringType().asErasure().isInterface();
}
@Override
public boolean isSpecializableFor(TypeDescription targetType) {
if (isStatic()) { // Static private methods are never specializable, check static property first
return false;
} else if (isPrivate() || isConstructor()) {
return getDeclaringType().equals(targetType);
} else {
return !isAbstract() && getDeclaringType().asErasure().isAssignableFrom(targetType);
}
}
@Override
public T getDefaultValue(Class type) {
return type.cast(getDefaultValue());
}
@Override
public boolean isInvokableOn(TypeDescription typeDescription) {
return !isStatic()
&& !isTypeInitializer()
&& isVisibleTo(typeDescription)
&& (isVirtual()
? getDeclaringType().asErasure().isAssignableFrom(typeDescription)
: getDeclaringType().asErasure().equals(typeDescription));
}
@Override
public boolean isBootstrap() {
TypeDescription returnType = getReturnType().asErasure();
if ((isMethod() && (!isStatic()
|| !(JavaType.CALL_SITE.getTypeStub().isAssignableFrom(returnType) || JavaType.CALL_SITE.getTypeStub().isAssignableTo(returnType))))
|| (isConstructor() && !JavaType.CALL_SITE.getTypeStub().isAssignableFrom(getDeclaringType().asErasure()))) {
return false;
}
TypeList parameterTypes = getParameters().asTypeList().asErasures();
switch (parameterTypes.size()) {
case 0:
return false;
case 1:
return parameterTypes.getOnly().represents(Object[].class);
case 2:
return JavaType.METHOD_HANDLES_LOOKUP.getTypeStub().isAssignableTo(parameterTypes.get(0))
&& parameterTypes.get(1).represents(Object[].class);
case 3:
return JavaType.METHOD_HANDLES_LOOKUP.getTypeStub().isAssignableTo(parameterTypes.get(0))
&& (parameterTypes.get(1).represents(Object.class) || parameterTypes.get(1).represents(String.class))
&& (parameterTypes.get(2).represents(Object[].class) || JavaType.METHOD_TYPE.getTypeStub().isAssignableTo(parameterTypes.get(2)));
default:
if (!(JavaType.METHOD_HANDLES_LOOKUP.getTypeStub().isAssignableTo(parameterTypes.get(0))
&& (parameterTypes.get(1).represents(Object.class) || parameterTypes.get(1).represents(String.class))
&& (JavaType.METHOD_TYPE.getTypeStub().isAssignableTo(parameterTypes.get(2))))) {
return false;
}
int parameterIndex = 4;
for (TypeDescription parameterType : parameterTypes.subList(3, parameterTypes.size())) {
if (!parameterType.represents(Object.class) && !parameterType.isConstantPool()) {
return parameterType.represents(Object[].class) && parameterIndex == parameterTypes.size();
}
parameterIndex++;
}
return true;
}
}
@Override
public boolean isBootstrap(List arguments) {
if (!isBootstrap()) {
return false;
}
for (Object argument : arguments) {
Class argumentType = argument.getClass();
if (!(argumentType == String.class
|| argumentType == Integer.class
|| argumentType == Long.class
|| argumentType == Float.class
|| argumentType == Double.class
|| TypeDescription.class.isAssignableFrom(argumentType)
|| JavaInstance.MethodHandle.class.isAssignableFrom(argumentType)
|| JavaInstance.MethodType.class.isAssignableFrom(argumentType))) {
throw new IllegalArgumentException("Not a bootstrap argument: " + argument);
}
}
TypeList parameterTypes = getParameters().asTypeList().asErasures();
// The following assumes that the bootstrap method is a valid one, as checked above.
if (parameterTypes.size() < 4) {
return arguments.isEmpty() || parameterTypes.get(parameterTypes.size() - 1).represents(Object[].class);
} else {
int index = 4;
Iterator argumentIterator = arguments.iterator();
for (TypeDescription parameterType : parameterTypes.subList(3, parameterTypes.size())) {
boolean finalParameterCheck = !argumentIterator.hasNext();
if (!finalParameterCheck) {
Class argumentType = argumentIterator.next().getClass();
finalParameterCheck = !(parameterType.represents(String.class) && argumentType == String.class)
&& !(parameterType.represents(int.class) && argumentType == Integer.class)
&& !(parameterType.represents(long.class) && argumentType == Long.class)
&& !(parameterType.represents(float.class) && argumentType == Float.class)
&& !(parameterType.represents(double.class) && argumentType == Double.class)
&& !(parameterType.represents(Class.class) && TypeDescription.class.isAssignableFrom(argumentType))
&& !(parameterType.isAssignableFrom(JavaType.METHOD_HANDLE.getTypeStub()) && JavaInstance.MethodHandle.class.isAssignableFrom(argumentType))
&& !(parameterType.equals(JavaType.METHOD_TYPE.getTypeStub()) && JavaInstance.MethodType.class.isAssignableFrom(argumentType));
}
if (finalParameterCheck) {
return index == parameterTypes.size() && parameterType.represents(Object[].class);
}
index++;
}
return true;
}
}
@Override
public boolean isDefaultValue() {
return !isConstructor()
&& !isStatic()
&& getReturnType().asErasure().isAnnotationReturnType()
&& getParameters().isEmpty();
}
@Override
public boolean isDefaultValue(Object value) {
if (!isDefaultValue()) {
return false;
}
TypeDescription returnType = getReturnType().asErasure();
return (returnType.represents(boolean.class) && value instanceof Boolean)
|| (returnType.represents(byte.class) && value instanceof Byte)
|| (returnType.represents(char.class) && value instanceof Character)
|| (returnType.represents(short.class) && value instanceof Short)
|| (returnType.represents(int.class) && value instanceof Integer)
|| (returnType.represents(long.class) && value instanceof Long)
|| (returnType.represents(float.class) && value instanceof Float)
|| (returnType.represents(long.class) && value instanceof Long)
|| (returnType.represents(String.class) && value instanceof String)
|| (returnType.isAssignableTo(Enum.class) && value instanceof EnumerationDescription)
|| (returnType.isAssignableTo(Annotation.class) && value instanceof AnnotationDescription)
|| (returnType.represents(Class.class) && value instanceof TypeDescription);
}
@Override
public TypeVariableSource getEnclosingSource() {
return isStatic()
? TypeVariableSource.UNDEFINED
: getDeclaringType().asErasure();
}
@Override
public T accept(TypeVariableSource.Visitor visitor) {
return visitor.onMethod(this.asDefined());
}
@Override
public boolean isGenericDeclaration() {
return !getTypeVariables().isEmpty();
}
@Override
public MethodDescription.Token asToken(ElementMatcher matcher) {
TypeDescription.Generic receiverType = getReceiverType();
return new MethodDescription.Token(getInternalName(),
getModifiers(),
getTypeVariables().asTokenList(matcher),
getReturnType().accept(new TypeDescription.Generic.Visitor.Substitutor.ForDetachment(matcher)),
getParameters().asTokenList(matcher),
getExceptionTypes().accept(new TypeDescription.Generic.Visitor.Substitutor.ForDetachment(matcher)),
getDeclaredAnnotations(),
getDefaultValue(),
receiverType == null
? TypeDescription.Generic.UNDEFINED
: receiverType.accept(new TypeDescription.Generic.Visitor.Substitutor.ForDetachment(matcher)));
}
@Override
public SignatureToken asSignatureToken() {
return new SignatureToken(getInternalName(), getReturnType().asErasure(), getParameters().asTypeList().asErasures());
}
@Override
public TypeToken asTypeToken() {
return new TypeToken(getReturnType().asErasure(), getParameters().asTypeList().asErasures());
}
@Override
public boolean equals(Object other) {
return other == this || other instanceof MethodDescription
&& getInternalName().equals(((MethodDescription) other).getInternalName())
&& getDeclaringType().equals(((MethodDescription) other).getDeclaringType())
&& getReturnType().asErasure().equals(((MethodDescription) other).getReturnType().asErasure())
&& getParameters().asTypeList().asErasures().equals(((MethodDescription) other).getParameters().asTypeList().asErasures());
}
@Override
public int hashCode() {
int hashCode = getDeclaringType().hashCode();
hashCode = 31 * hashCode + getInternalName().hashCode();
hashCode = 31 * hashCode + getReturnType().asErasure().hashCode();
return 31 * hashCode + getParameters().asTypeList().asErasures().hashCode();
}
@Override
public String toGenericString() {
StringBuilder stringBuilder = new StringBuilder();
int modifiers = getModifiers() & SOURCE_MODIFIERS;
if (modifiers != EMPTY_MASK) {
stringBuilder.append(Modifier.toString(modifiers)).append(" ");
}
if (isMethod()) {
stringBuilder.append(getReturnType().getSourceCodeName()).append(" ");
stringBuilder.append(getDeclaringType().asErasure().getSourceCodeName()).append(".");
}
stringBuilder.append(getName()).append("(");
boolean first = true;
for (TypeDescription.Generic typeDescription : getParameters().asTypeList()) {
if (!first) {
stringBuilder.append(",");
} else {
first = false;
}
stringBuilder.append(typeDescription.getSourceCodeName());
}
stringBuilder.append(")");
TypeList.Generic exceptionTypes = getExceptionTypes();
if (!exceptionTypes.isEmpty()) {
stringBuilder.append(" throws ");
first = true;
for (TypeDescription.Generic typeDescription : exceptionTypes) {
if (!first) {
stringBuilder.append(",");
} else {
first = false;
}
stringBuilder.append(typeDescription.getSourceCodeName());
}
}
return stringBuilder.toString();
}
@Override
public String toString() {
StringBuilder stringBuilder = new StringBuilder();
int modifiers = getModifiers() & SOURCE_MODIFIERS;
if (modifiers != EMPTY_MASK) {
stringBuilder.append(Modifier.toString(modifiers)).append(" ");
}
if (isMethod()) {
stringBuilder.append(getReturnType().asErasure().getSourceCodeName()).append(" ");
stringBuilder.append(getDeclaringType().asErasure().getSourceCodeName()).append(".");
}
stringBuilder.append(getName()).append("(");
boolean first = true;
for (TypeDescription typeDescription : getParameters().asTypeList().asErasures()) {
if (!first) {
stringBuilder.append(",");
} else {
first = false;
}
stringBuilder.append(typeDescription.getSourceCodeName());
}
stringBuilder.append(")");
TypeList exceptionTypes = getExceptionTypes().asErasures();
if (!exceptionTypes.isEmpty()) {
stringBuilder.append(" throws ");
first = true;
for (TypeDescription typeDescription : exceptionTypes) {
if (!first) {
stringBuilder.append(",");
} else {
first = false;
}
stringBuilder.append(typeDescription.getSourceCodeName());
}
}
return stringBuilder.toString();
}
}
/**
* An implementation of a method description for a loaded constructor.
*/
class ForLoadedConstructor extends InDefinedShape.AbstractBase {
/**
* The loaded constructor that is represented by this instance.
*/
private final Constructor constructor;
/**
* Creates a new immutable method description for a loaded constructor.
*
* @param constructor The loaded constructor to be represented by this method description.
*/
public ForLoadedConstructor(Constructor constructor) {
this.constructor = constructor;
}
@Override
public TypeDescription getDeclaringType() {
return new TypeDescription.ForLoadedType(constructor.getDeclaringClass());
}
@Override
public TypeDescription.Generic getReturnType() {
return TypeDescription.Generic.VOID;
}
@Override
public ParameterList getParameters() {
return ParameterList.ForLoadedExecutable.of(constructor);
}
@Override
public TypeList.Generic getExceptionTypes() {
return new TypeList.Generic.OfConstructorExceptionTypes(constructor);
}
@Override
public boolean isConstructor() {
return true;
}
@Override
public boolean isTypeInitializer() {
return false;
}
@Override
public boolean represents(Method method) {
return false;
}
@Override
public boolean represents(Constructor constructor) {
return this.constructor.equals(constructor) || equals(new ForLoadedConstructor(constructor));
}
@Override
public String getName() {
return constructor.getName();
}
@Override
public int getModifiers() {
return constructor.getModifiers();
}
@Override
public boolean isSynthetic() {
return constructor.isSynthetic();
}
@Override
public String getInternalName() {
return CONSTRUCTOR_INTERNAL_NAME;
}
@Override
public String getDescriptor() {
return Type.getConstructorDescriptor(constructor);
}
@Override
public Object getDefaultValue() {
return NO_DEFAULT_VALUE;
}
@Override
public AnnotationList getDeclaredAnnotations() {
return new AnnotationList.ForLoadedAnnotations(constructor.getDeclaredAnnotations());
}
@Override
public TypeList.Generic getTypeVariables() {
return TypeList.Generic.ForLoadedTypes.OfTypeVariables.of(constructor);
}
@Override
public TypeDescription.Generic getReceiverType() {
TypeDescription.Generic receiverType = TypeDescription.Generic.AnnotationReader.DISPATCHER.resolveReceiverType(constructor);
return receiverType == null
? super.getReceiverType()
: receiverType;
}
}
/**
* An implementation of a method description for a loaded method.
*/
class ForLoadedMethod extends InDefinedShape.AbstractBase {
/**
* The loaded method that is represented by this instance.
*/
private final Method method;
/**
* Creates a new immutable method description for a loaded method.
*
* @param method The loaded method to be represented by this method description.
*/
public ForLoadedMethod(Method method) {
this.method = method;
}
@Override
public TypeDescription getDeclaringType() {
return new TypeDescription.ForLoadedType(method.getDeclaringClass());
}
@Override
public TypeDescription.Generic getReturnType() {
return new TypeDescription.Generic.LazyProjection.ForLoadedReturnType(method);
}
@Override
public ParameterList getParameters() {
return ParameterList.ForLoadedExecutable.of(method);
}
@Override
public TypeList.Generic getExceptionTypes() {
return new TypeList.Generic.OfMethodExceptionTypes(method);
}
@Override
public boolean isConstructor() {
return false;
}
@Override
public boolean isTypeInitializer() {
return false;
}
@Override
public boolean isBridge() {
return method.isBridge();
}
@Override
public boolean represents(Method method) {
return this.method.equals(method) || equals(new ForLoadedMethod(method));
}
@Override
public boolean represents(Constructor constructor) {
return false;
}
@Override
public String getName() {
return method.getName();
}
@Override
public int getModifiers() {
return method.getModifiers();
}
@Override
public boolean isSynthetic() {
return method.isSynthetic();
}
@Override
public String getInternalName() {
return method.getName();
}
@Override
public String getDescriptor() {
return Type.getMethodDescriptor(method);
}
/**
* Returns the loaded method that is represented by this method description.
*
* @return The loaded method that is represented by this method description.
*/
public Method getLoadedMethod() {
return method;
}
@Override
public AnnotationList getDeclaredAnnotations() {
return new AnnotationList.ForLoadedAnnotations(method.getDeclaredAnnotations());
}
@Override
public Object getDefaultValue() {
Object value = method.getDefaultValue();
return value == null
? NO_DEFAULT_VALUE
: AnnotationDescription.ForLoadedAnnotation.describe(value, new TypeDescription.ForLoadedType(method.getReturnType()));
}
@Override
public TypeList.Generic getTypeVariables() {
return TypeList.Generic.ForLoadedTypes.OfTypeVariables.of(method);
}
@Override
public TypeDescription.Generic getReceiverType() {
TypeDescription.Generic receiverType = TypeDescription.Generic.AnnotationReader.DISPATCHER.resolveReceiverType(method);
return receiverType == null
? super.getReceiverType()
: receiverType;
}
}
/**
* A latent method description describes a method that is not attached to a declaring
* {@link TypeDescription}.
*/
class Latent extends InDefinedShape.AbstractBase {
/**
* The type that is declaring this method.
*/
private final TypeDescription declaringType;
/**
* The internal name of this method.
*/
private final String internalName;
/**
* The modifiers of this method.
*/
private final int modifiers;
/**
* A tokenized list representing the method's type variables.
*/
private final List typeVariables;
/**
* The return type of this method.
*/
private final TypeDescription.Generic returnType;
/**
* The parameter tokens describing this method.
*/
private final List parameterTokens;
/**
* This method's exception types.
*/
private final List exceptionTypes;
/**
* The annotations of this method.
*/
private final List declaredAnnotations;
/**
* The default value of this method or {@code null} if no default annotation value is defined.
*/
private final Object defaultValue;
/**
* The receiver type of this method or {@code null} if the receiver type is defined implicitly.
*/
private final TypeDescription.Generic receiverType;
/**
* Creates a new latent method description. All provided types are attached to this instance before they are returned.
*
* @param declaringType The declaring type of the method.
* @param token A token representing the method's shape.
*/
public Latent(TypeDescription declaringType, MethodDescription.Token token) {
this(declaringType,
token.getName(),
token.getModifiers(),
token.getTypeVariableTokens(),
token.getReturnType(),
token.getParameterTokens(),
token.getExceptionTypes(),
token.getAnnotations(),
token.getDefaultValue(),
token.getReceiverType());
}
/**
* Creates a new latent method description. All provided types are attached to this instance before they are returned.
*
* @param declaringType The type that is declaring this method.
* @param internalName The internal name of this method.
* @param modifiers The modifiers of this method.
* @param typeVariables The type variables of the described method.
* @param returnType The return type of this method.
* @param parameterTokens The parameter tokens describing this method.
* @param exceptionTypes This method's exception types.
* @param declaredAnnotations The annotations of this method.
* @param defaultValue The default value of this method or {@code null} if no default annotation value is defined.
* @param receiverType The receiver type of this method or {@code null} if the receiver type is defined implicitly.
*/
public Latent(TypeDescription declaringType,
String internalName,
int modifiers,
List typeVariables,
TypeDescription.Generic returnType,
List parameterTokens,
List exceptionTypes,
List declaredAnnotations,
Object defaultValue,
TypeDescription.Generic receiverType) {
this.declaringType = declaringType;
this.internalName = internalName;
this.modifiers = modifiers;
this.typeVariables = typeVariables;
this.returnType = returnType;
this.parameterTokens = parameterTokens;
this.exceptionTypes = exceptionTypes;
this.declaredAnnotations = declaredAnnotations;
this.defaultValue = defaultValue;
this.receiverType = receiverType;
}
@Override
public TypeList.Generic getTypeVariables() {
return TypeList.Generic.ForDetachedTypes.attachVariables(this, typeVariables);
}
@Override
public TypeDescription.Generic getReturnType() {
return returnType.accept(TypeDescription.Generic.Visitor.Substitutor.ForAttachment.of(this));
}
@Override
public ParameterList getParameters() {
return new ParameterList.ForTokens(this, parameterTokens);
}
@Override
public TypeList.Generic getExceptionTypes() {
return TypeList.Generic.ForDetachedTypes.attach(this, exceptionTypes);
}
@Override
public AnnotationList getDeclaredAnnotations() {
return new AnnotationList.Explicit(declaredAnnotations);
}
@Override
public String getInternalName() {
return internalName;
}
@Override
public TypeDescription getDeclaringType() {
return declaringType;
}
@Override
public int getModifiers() {
return modifiers;
}
@Override
public Object getDefaultValue() {
return defaultValue;
}
@Override
public TypeDescription.Generic getReceiverType() {
return receiverType == null
? super.getReceiverType()
: receiverType.accept(TypeDescription.Generic.Visitor.Substitutor.ForAttachment.of(this));
}
/**
* A method description that represents the type initializer.
*/
public static class TypeInitializer extends InDefinedShape.AbstractBase {
/**
* The type for which the type initializer should be represented.
*/
private final TypeDescription typeDescription;
/**
* Creates a new method description representing the type initializer.
*
* @param typeDescription The type for which the type initializer should be represented.
*/
public TypeInitializer(TypeDescription typeDescription) {
this.typeDescription = typeDescription;
}
@Override
public TypeDescription.Generic getReturnType() {
return TypeDescription.Generic.VOID;
}
@Override
public ParameterList getParameters() {
return new ParameterList.Empty();
}
@Override
public TypeList.Generic getExceptionTypes() {
return new TypeList.Generic.Empty();
}
@Override
public Object getDefaultValue() {
return NO_DEFAULT_VALUE;
}
@Override
public TypeList.Generic getTypeVariables() {
return new TypeList.Generic.Empty();
}
@Override
public AnnotationList getDeclaredAnnotations() {
return new AnnotationList.Empty();
}
@Override
public TypeDescription getDeclaringType() {
return typeDescription;
}
@Override
public int getModifiers() {
return TYPE_INITIALIZER_MODIFIER;
}
@Override
public String getInternalName() {
return MethodDescription.TYPE_INITIALIZER_INTERNAL_NAME;
}
}
}
/**
* A method description that represents a given method but with substituted method types.
*/
class TypeSubstituting extends AbstractBase implements InGenericShape {
/**
* The type that declares this type-substituted method.
*/
private final TypeDescription.Generic declaringType;
/**
* The represented method description.
*/
private final MethodDescription methodDescription;
/**
* A visitor that is applied to the method type.
*/
private final TypeDescription.Generic.Visitor visitor;
/**
* Creates a method description with substituted method types.
*
* @param declaringType The type that is declaring the substituted method.
* @param methodDescription The represented method description.
* @param visitor A visitor that is applied to the method type.
*/
public TypeSubstituting(TypeDescription.Generic declaringType,
MethodDescription methodDescription,
TypeDescription.Generic.Visitor visitor) {
this.declaringType = declaringType;
this.methodDescription = methodDescription;
this.visitor = visitor;
}
@Override
public TypeList.Generic getTypeVariables() {
return new TypeList.Generic.ForDetachedTypes(methodDescription.getTypeVariables(), visitor);
}
@Override
public TypeDescription.Generic getReturnType() {
return methodDescription.getReturnType().accept(visitor);
}
@Override
public ParameterList getParameters() {
return new ParameterList.TypeSubstituting(this, methodDescription.getParameters(), visitor);
}
@Override
public TypeList.Generic getExceptionTypes() {
return new TypeList.Generic.ForDetachedTypes(methodDescription.getExceptionTypes(), visitor);
}
@Override
public Object getDefaultValue() {
return methodDescription.getDefaultValue();
}
@Override
public TypeDescription.Generic getReceiverType() {
TypeDescription.Generic receiverType = methodDescription.getReceiverType();
return receiverType == null
? TypeDescription.Generic.UNDEFINED
: receiverType.accept(visitor);
}
@Override
public AnnotationList getDeclaredAnnotations() {
return methodDescription.getDeclaredAnnotations();
}
@Override
public TypeDescription.Generic getDeclaringType() {
return declaringType;
}
@Override
public int getModifiers() {
return methodDescription.getModifiers();
}
@Override
public String getInternalName() {
return methodDescription.getInternalName();
}
@Override
public InDefinedShape asDefined() {
return methodDescription.asDefined();
}
}
/**
* A token representing a method's properties detached from a type.
*/
class Token implements ByteCodeElement.Token {
/**
* The internal name of the represented method.
*/
private final String name;
/**
* The modifiers of the represented method.
*/
private final int modifiers;
/**
* A list of tokens representing the method's type variables.
*/
private final List typeVariableTokens;
/**
* The return type of the represented method.
*/
private final TypeDescription.Generic returnType;
/**
* The parameter tokens of the represented method.
*/
private final List parameterTokens;
/**
* The exception types of the represented method.
*/
private final List exceptionTypes;
/**
* The annotations of the represented method.
*/
private final List annotations;
/**
* The default value of the represented method or {@code null} if no such value exists.
*/
private final Object defaultValue;
/**
* The receiver type of the represented method or {@code null} if the receiver type is implicit.
*/
private final TypeDescription.Generic receiverType;
/**
* Creates a new method token representing a constructor without any parameters, exception types, type variables or annotations.
* All types must be represented in an detached format.
*
* @param modifiers The constructor's modifiers.
*/
public Token(int modifiers) {
this(MethodDescription.CONSTRUCTOR_INTERNAL_NAME, modifiers, TypeDescription.Generic.VOID);
}
/**
* Creates a new method token representing a method without any parameters, exception types, type variables or annotations.
* All types must be represented in an detached format.
*
* @param name The name of the method.
* @param modifiers The modifiers of the method.
* @param returnType The return type of the method.
*/
public Token(String name, int modifiers, TypeDescription.Generic returnType) {
this(name, modifiers, returnType, Collections.emptyList());
}
/**
* Creates a new method token with simple values. All types must be represented in an detached format.
*
* @param name The internal name of the represented method.
* @param modifiers The modifiers of the represented method.
* @param returnType The return type of the represented method.
* @param parameterTypes The parameter types of this method.
*/
public Token(String name, int modifiers, TypeDescription.Generic returnType, List parameterTypes) {
this(name,
modifiers,
Collections.emptyList(),
returnType,
new ParameterDescription.Token.TypeList(parameterTypes),
Collections.emptyList(),
Collections.emptyList(),
NO_DEFAULT_VALUE,
TypeDescription.Generic.UNDEFINED);
}
/**
* Creates a new token for a method description. All types must be represented in an detached format.
*
* @param name The internal name of the represented method.
* @param modifiers The modifiers of the represented method.
* @param typeVariableTokens The type variables of the the represented method.
* @param returnType The return type of the represented method.
* @param parameterTokens The parameter tokens of the represented method.
* @param exceptionTypes The exception types of the represented method.
* @param annotations The annotations of the represented method.
* @param defaultValue The default value of the represented method or {@code null} if no such value exists.
* @param receiverType The receiver type of the represented method or {@code null} if the receiver type is implicit.
*/
public Token(String name,
int modifiers,
List typeVariableTokens,
TypeDescription.Generic returnType,
List parameterTokens,
List exceptionTypes,
List annotations,
Object defaultValue,
TypeDescription.Generic receiverType) {
this.name = name;
this.modifiers = modifiers;
this.typeVariableTokens = typeVariableTokens;
this.returnType = returnType;
this.parameterTokens = parameterTokens;
this.exceptionTypes = exceptionTypes;
this.annotations = annotations;
this.defaultValue = defaultValue;
this.receiverType = receiverType;
}
/**
* Returns the internal name of the represented method.
*
* @return The internal name of the represented method.
*/
public String getName() {
return name;
}
/**
* Returns the modifiers of the represented method.
*
* @return The modifiers of the represented method.
*/
public int getModifiers() {
return modifiers;
}
/**
* Returns the type variables of this method token.
*
* @return A a list of tokens representing the method's type variables.
*/
public TokenList getTypeVariableTokens() {
return new TokenList(typeVariableTokens);
}
/**
* Returns the return type of the represented method.
*
* @return The return type of the represented method.
*/
public TypeDescription.Generic getReturnType() {
return returnType;
}
/**
* Returns the parameter tokens of the represented method.
*
* @return The parameter tokens of the represented method.
*/
public TokenList getParameterTokens() {
return new TokenList(parameterTokens);
}
/**
* Returns the exception types of the represented method.
*
* @return The exception types of the represented method.
*/
public TypeList.Generic getExceptionTypes() {
return new TypeList.Generic.Explicit(exceptionTypes);
}
/**
* Returns the annotations of the represented method.
*
* @return The annotations of the represented method.
*/
public AnnotationList getAnnotations() {
return new AnnotationList.Explicit(annotations);
}
/**
* Returns the default value of the represented method.
*
* @return The default value of the represented method or {@code null} if no such value exists.
*/
public Object getDefaultValue() {
return defaultValue;
}
/**
* Returns the receiver type of this token or {@code null} if the receiver type is implicit.
*
* @return The receiver type of this token or {@code null} if the receiver type is implicit.
*/
public TypeDescription.Generic getReceiverType() {
return receiverType;
}
@Override
public Token accept(TypeDescription.Generic.Visitor visitor) {
return new Token(name,
modifiers,
getTypeVariableTokens().accept(visitor),
returnType.accept(visitor),
getParameterTokens().accept(visitor),
getExceptionTypes().accept(visitor),
annotations,
defaultValue,
receiverType == null
? TypeDescription.Generic.UNDEFINED
: receiverType.accept(visitor));
}
/**
* Creates a signature token that represents the method that is represented by this token.
*
* @param declaringType The declaring type of the method that this token represents.
* @return A signature token representing this token.
*/
public SignatureToken asSignatureToken(TypeDescription declaringType) {
TypeDescription.Generic.Visitor visitor = new TypeDescription.Generic.Visitor.Reducing(declaringType, typeVariableTokens);
List parameters = new ArrayList(parameterTokens.size());
for (ParameterDescription.Token parameter : parameterTokens) {
parameters.add(parameter.getType().accept(visitor));
}
return new SignatureToken(name, returnType.accept(visitor), parameters);
}
@Override
public boolean equals(Object other) {
if (this == other) return true;
if (other == null || getClass() != other.getClass()) return false;
Token token = (Token) other;
return modifiers == token.modifiers
&& name.equals(token.name)
&& typeVariableTokens.equals(token.typeVariableTokens)
&& returnType.equals(token.returnType)
&& parameterTokens.equals(token.parameterTokens)
&& exceptionTypes.equals(token.exceptionTypes)
&& annotations.equals(token.annotations)
&& (defaultValue != null ? defaultValue.equals(token.defaultValue) : token.defaultValue == null)
&& (receiverType != null ? receiverType.equals(token.receiverType) : token.receiverType == null);
}
@Override
public int hashCode() {
int result = name.hashCode();
result = 31 * result + modifiers;
result = 31 * result + typeVariableTokens.hashCode();
result = 31 * result + returnType.hashCode();
result = 31 * result + parameterTokens.hashCode();
result = 31 * result + exceptionTypes.hashCode();
result = 31 * result + annotations.hashCode();
result = 31 * result + (defaultValue != null ? defaultValue.hashCode() : 0);
result = 31 * result + (receiverType != null ? receiverType.hashCode() : 0);
return result;
}
@Override
public String toString() {
return "MethodDescription.Token{" +
"name='" + name + '\'' +
", modifiers=" + modifiers +
", typeVariableTokens=" + typeVariableTokens +
", returnType=" + returnType +
", parameterTokens=" + parameterTokens +
", exceptionTypes=" + exceptionTypes +
", annotations=" + annotations +
", defaultValue=" + defaultValue +
", receiverType=" + receiverType +
'}';
}
}
/**
* A token representing a method's name and raw return and parameter types.
*/
class SignatureToken {
/**
* The internal name of the represented method.
*/
private final String name;
/**
* The represented method's raw return type.
*/
private final TypeDescription returnType;
/**
* The represented method's raw parameter types.
*/
private final List parameterTypes;
/**
* Creates a new type token.
*
* @param name The internal name of the represented method.
* @param returnType The represented method's raw return type.
* @param parameterTypes The represented method's raw parameter types.
*/
public SignatureToken(String name, TypeDescription returnType, List parameterTypes) {
this.name = name;
this.returnType = returnType;
this.parameterTypes = parameterTypes;
}
/**
* Returns the internal name of the represented method.
*
* @return The internal name of the represented method.
*/
public String getName() {
return name;
}
/**
* Returns this token's return type.
*
* @return This token's return type.
*/
public TypeDescription getReturnType() {
return returnType;
}
/**
* Returns this token's parameter types.
*
* @return This token's parameter types.
*/
public List getParameterTypes() {
return new ArrayList(parameterTypes);
}
/**
* Returns this signature token as a type token.
*
* @return This signature token as a type token.
*/
public TypeToken asTypeToken() {
return new TypeToken(returnType, parameterTypes);
}
@Override
public boolean equals(Object other) {
if (this == other) return true;
if (other == null || getClass() != other.getClass()) return false;
SignatureToken signatureToken = (SignatureToken) other;
return name.equals(signatureToken.name)
&& returnType.equals(signatureToken.returnType)
&& parameterTypes.equals(signatureToken.parameterTypes);
}
@Override
public int hashCode() {
int result = name.hashCode();
result = 31 * result + returnType.hashCode();
result = 31 * result + parameterTypes.hashCode();
return result;
}
@Override
public String toString() {
return "MethodDescription.SignatureToken{" +
"name='" + name + "'" +
", returnType=" + returnType +
", parameterTypes=" + parameterTypes +
'}';
}
}
/**
* A token representing a method's erased return and parameter types.
*/
class TypeToken {
/**
* The represented method's raw return type.
*/
private final TypeDescription returnType;
/**
* The represented method's raw parameter types.
*/
private final List parameterTypes;
/**
* Creates a new type token.
*
* @param returnType The represented method's raw return type.
* @param parameterTypes The represented method's raw parameter types.
*/
public TypeToken(TypeDescription returnType, List parameterTypes) {
this.returnType = returnType;
this.parameterTypes = parameterTypes;
}
/**
* Returns this token's return type.
*
* @return This token's return type.
*/
public TypeDescription getReturnType() {
return returnType;
}
/**
* Returns this token's parameter types.
*
* @return This token's parameter types.
*/
public List getParameterTypes() {
return new ArrayList(parameterTypes);
}
@Override
public boolean equals(Object other) {
if (this == other) return true;
if (other == null || getClass() != other.getClass()) return false;
TypeToken typeToken = (TypeToken) other;
return returnType.equals(typeToken.returnType)
&& parameterTypes.equals(typeToken.parameterTypes);
}
@Override
public int hashCode() {
int result = returnType.hashCode();
result = 31 * result + parameterTypes.hashCode();
return result;
}
@Override
public String toString() {
return "MethodDescription.TypeToken{" +
"returnType=" + returnType +
", parameterTypes=" + parameterTypes +
'}';
}
}
}
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