package net.bytebuddy.description.method;
import net.bytebuddy.description.ByteCodeElement;
import net.bytebuddy.description.type.TypeDescription;
import net.bytebuddy.matcher.ElementMatcher;
import net.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 <T> The type of method descriptions represented by this list.
*/
public interface MethodList<T extends MethodDescription> extends FilterableList<T, MethodList<T>> {
/**
* 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 net.bytebuddy.dynamic.TargetType}.
*
* @param matcher A matcher that indicates type substitution.
* @return The transformed token list.
*/
ByteCodeElement.Token.TokenList<MethodDescription.Token> asTokenList(ElementMatcher<? super TypeDescription> matcher);
/**
* Returns this list of these method descriptions resolved to their defined shape.
*
* @return A list of methods in their defined shape.
*/
MethodList<MethodDescription.InDefinedShape> asDefined();
/**
* A base implementation of a {@link MethodList}.
*
* @param <S> The type of method descriptions represented by this list.
*/
abstract class AbstractBase<S extends MethodDescription> extends FilterableList.AbstractBase<S, MethodList<S>> implements MethodList<S> {
@Override
protected MethodList<S> wrap(List<S> values) {
return new Explicit<S>(values);
}
@Override
public ByteCodeElement.Token.TokenList<MethodDescription.Token> asTokenList(ElementMatcher<? super TypeDescription> matcher) {
List<MethodDescription.Token> tokens = new ArrayList<MethodDescription.Token>(size());
for (MethodDescription methodDescription : this) {
tokens.add(methodDescription.asToken(matcher));
}
return new ByteCodeElement.Token.TokenList<MethodDescription.Token>(tokens);
}
@Override
public MethodList<MethodDescription.InDefinedShape> asDefined() {
List<MethodDescription.InDefinedShape> declaredForms = new ArrayList<MethodDescription.InDefinedShape>(size());
for (MethodDescription methodDescription : this) {
declaredForms.add(methodDescription.asDefined());
}
return new Explicit<MethodDescription.InDefinedShape>(declaredForms);
}
}
/**
* A method list implementation that returns all loaded byte code methods (methods and constructors) that
* are declared for a given type.
*/
class ForLoadedMethods extends AbstractBase<MethodDescription.InDefinedShape> {
/**
* The loaded methods that are represented by this method list.
*/
private final List<? extends Method> methods;
/**
* The loaded constructors that are represented by this method list.
*/
private final List<? extends Constructor<?>> 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 ForLoadedMethods(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 ForLoadedMethods(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 ForLoadedMethods(List<? extends Constructor<?>> constructors, List<? extends Method> 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 <S> The type of method descriptions represented by this list.
*/
class Explicit<S extends MethodDescription> extends AbstractBase<S> {
/**
* The list of methods that is represented by this method list.
*/
private final List<? extends S> 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<? extends S> 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<MethodDescription.InDefinedShape> {
/**
* The method's declaring type.
*/
private final TypeDescription declaringType;
/**
* The list of method tokens to represent.
*/
private final List<? extends MethodDescription.Token> 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<? extends MethodDescription.Token> 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 net.bytebuddy.description.method.MethodDescription.TypeSubstituting}.
*/
class TypeSubstituting extends AbstractBase<MethodDescription.InGenericShape> {
/**
* The methods' declaring type.
*/
protected final TypeDescription.Generic declaringType;
/**
* The list of method descriptions to represent.
*/
protected final List<? extends MethodDescription> methodDescriptions;
/**
* The visitor to apply to each method description before returning it.
*/
protected final TypeDescription.Generic.Visitor<? extends TypeDescription.Generic> 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<? extends MethodDescription> methodDescriptions,
TypeDescription.Generic.Visitor<? extends TypeDescription.Generic> 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 <S> The type of parameter descriptions represented by this list.
*/
class Empty<S extends MethodDescription> extends FilterableList.Empty<S, MethodList<S>> implements MethodList<S> {
@Override
public ByteCodeElement.Token.TokenList<MethodDescription.Token> asTokenList(ElementMatcher<? super TypeDescription> matcher) {
return new ByteCodeElement.Token.TokenList<MethodDescription.Token>();
}
@Override
@SuppressWarnings("unchecked")
public MethodList<MethodDescription.InDefinedShape> asDefined() {
return (MethodList<MethodDescription.InDefinedShape>) this;
}
}
}