com.fitbur.bytebuddy.description.method.MethodList Maven / Gradle / Ivy
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package com.fitbur.bytebuddy.description.method;
import com.fitbur.bytebuddy.description.ByteCodeElement;
import com.fitbur.bytebuddy.description.type.TypeDescription;
import com.fitbur.bytebuddy.matcher.ElementMatcher;
import com.fitbur.bytebuddy.matcher.FilterableList;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
/**
* Implementations represent a list of method descriptions.
*
* @param The type of method descriptions represented by this list.
*/
public interface MethodList extends FilterableList> {
/**
* Transforms the list of method descriptions into a list of detached tokens. All types that are matched by the provided
* target type matcher are substituted by {@link com.fitbur.bytebuddy.dynamic.TargetType}.
*
* @param matcher A matcher that indicates type substitution.
* @return The transformed token list.
*/
ByteCodeElement.Token.TokenList asTokenList(ElementMatcher matcher);
/**
* Returns this list of these method descriptions resolved to their defined shape.
*
* @return A list of methods in their defined shape.
*/
MethodList asDefined();
/**
* A base implementation of a {@link MethodList}.
*
* @param The type of method descriptions represented by this list.
*/
abstract class AbstractBase extends FilterableList.AbstractBase> implements MethodList {
@Override
protected MethodList wrap(List values) {
return new Explicit(values);
}
@Override
public ByteCodeElement.Token.TokenList asTokenList(ElementMatcher matcher) {
List tokens = new ArrayList(size());
for (MethodDescription fieldDescription : this) {
tokens.add(fieldDescription.asToken(matcher));
}
return new ByteCodeElement.Token.TokenList(tokens);
}
@Override
public MethodList asDefined() {
List declaredForms = new ArrayList(size());
for (MethodDescription methodDescription : this) {
declaredForms.add(methodDescription.asDefined());
}
return new Explicit(declaredForms);
}
}
/**
* A method list implementation that returns all loaded byte code methods (methods and constructors) that
* are declared for a given type.
*/
class ForLoadedType extends AbstractBase {
/**
* The loaded methods that are represented by this method list.
*/
private final List methods;
/**
* The loaded constructors that are represented by this method list.
*/
private final List> constructors;
/**
* Creates a new list for a loaded type. Method descriptions are created on demand.
*
* @param type The type to be represented by this method list.
*/
public ForLoadedType(Class type) {
this(type.getDeclaredConstructors(), type.getDeclaredMethods());
}
/**
* Creates a method list that represents the given constructors and methods in their given order. The
* constructors are assigned the indices before the methods.
*
* @param constructor The constructors to be represented by the method list.
* @param method The methods to be represented by the method list.
*/
public ForLoadedType(Constructor[] constructor, Method[] method) {
this(Arrays.asList(constructor), Arrays.asList(method));
}
/**
* Creates a method list that represents the given constructors and methods in their given order. The
* constructors are assigned the indices before the methods.
*
* @param constructors The constructors to be represented by the method list.
* @param methods The methods to be represented by the method list.
*/
public ForLoadedType(List> constructors, List methods) {
this.constructors = constructors;
this.methods = methods;
}
@Override
public MethodDescription.InDefinedShape get(int index) {
return index < constructors.size()
? new MethodDescription.ForLoadedConstructor(constructors.get(index))
: new MethodDescription.ForLoadedMethod(methods.get(index - constructors.size()));
}
@Override
public int size() {
return constructors.size() + methods.size();
}
}
/**
* A method list that is a wrapper for a given list of method descriptions.
*
* @param The type of method descriptions represented by this list.
*/
class Explicit extends AbstractBase {
/**
* The list of methods that is represented by this method list.
*/
private final List methodDescriptions;
/**
* Creates a new wrapper for a given list of methods.
*
* @param methodDescription The underlying list of methods used for this method list.
*/
@SuppressWarnings("unchecked")
public Explicit(S... methodDescription) {
this(Arrays.asList(methodDescription));
}
/**
* Creates a new wrapper for a given list of methods.
*
* @param methodDescriptions The underlying list of methods used for this method list.
*/
public Explicit(List methodDescriptions) {
this.methodDescriptions = methodDescriptions;
}
@Override
public S get(int index) {
return methodDescriptions.get(index);
}
@Override
public int size() {
return methodDescriptions.size();
}
}
/**
* A list of method descriptions for a list of detached tokens. For the returned method, each token is attached to its method representation.
*/
class ForTokens extends AbstractBase {
/**
* The method's declaring type.
*/
private final TypeDescription declaringType;
/**
* The list of method tokens to represent.
*/
private final List tokens;
/**
* Creates a new list of method descriptions for a list of detached tokens.
*
* @param declaringType The method's declaring type.
* @param token The list of method tokens to represent.
*/
public ForTokens(TypeDescription declaringType, MethodDescription.Token... token) {
this(declaringType, Arrays.asList(token));
}
/**
* Creates a new list of method descriptions for a list of detached tokens.
*
* @param declaringType The method's declaring type.
* @param tokens The list of method tokens to represent.
*/
public ForTokens(TypeDescription declaringType, List tokens) {
this.declaringType = declaringType;
this.tokens = tokens;
}
@Override
public MethodDescription.InDefinedShape get(int index) {
return new MethodDescription.Latent(declaringType, tokens.get(index));
}
@Override
public int size() {
return tokens.size();
}
}
/**
* A list of method descriptions that yields {@link com.fitbur.bytebuddy.description.method.MethodDescription.TypeSubstituting}.
*/
class TypeSubstituting extends AbstractBase {
/**
* The methods' declaring type.
*/
private final TypeDescription.Generic declaringType;
/**
* The list of method descriptions to represent.
*/
private final List methodDescriptions;
/**
* The visitor to apply to each method description before returning it.
*/
private final TypeDescription.Generic.Visitor visitor;
/**
* Creates a new type substituting method list.
*
* @param declaringType The methods' declaring type.
* @param methodDescriptions The list of method descriptions to represent.
* @param visitor The visitor to apply to each method description before returning it.
*/
public TypeSubstituting(TypeDescription.Generic declaringType,
List methodDescriptions,
TypeDescription.Generic.Visitor visitor) {
this.declaringType = declaringType;
this.methodDescriptions = methodDescriptions;
this.visitor = visitor;
}
@Override
public MethodDescription.InGenericShape get(int index) {
return new MethodDescription.TypeSubstituting(declaringType, methodDescriptions.get(index), visitor);
}
@Override
public int size() {
return methodDescriptions.size();
}
}
/**
* An implementation of an empty method list.
*
* @param The type of parameter descriptions represented by this list.
*/
class Empty extends FilterableList.Empty> implements MethodList {
@Override
public ByteCodeElement.Token.TokenList asTokenList(ElementMatcher matcher) {
return new ByteCodeElement.Token.TokenList();
}
@Override
@SuppressWarnings("unchecked")
public MethodList asDefined() {
return (MethodList) this;
}
}
}
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