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AspectJ tools most notably contains the AspectJ compiler (AJC). AJC applies aspects to Java classes during compilation, fully replacing Javac for plain Java classes and also compiling native AspectJ or annotation-based @AspectJ syntax. Furthermore, AJC can weave aspects into existing class files in a post-compile binary weaving step. This library is a superset of AspectJ weaver and hence also of AspectJ runtime.

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/* *******************************************************************
 * Copyright (c) 2005, 2017 Contributors.
 * All rights reserved.
 * This program and the accompanying materials are made available
 * under the terms of the Eclipse Public License v 2.0
 * which accompanies this distribution and is available at
 * https://www.eclipse.org/org/documents/epl-2.0/EPL-2.0.txt
 *
 * ******************************************************************/
package org.aspectj.weaver.reflect;

import java.lang.reflect.Member;

import org.aspectj.weaver.AnnotationAJ;
import org.aspectj.weaver.MemberKind;
import org.aspectj.weaver.ResolvedMember;
import org.aspectj.weaver.ResolvedMemberImpl;
import org.aspectj.weaver.ResolvedType;
import org.aspectj.weaver.UnresolvedType;

/**
 * Subtype of ResolvedMemberImpl used in reflection world. Knows how to get annotations from a java.lang.reflect.Member
 *
 * @author Adrian Colyer
 * @author Andy Clement
 */
public class ReflectionBasedResolvedMemberImpl extends ResolvedMemberImpl {

	private AnnotationFinder annotationFinder = null;
	private GenericSignatureInformationProvider gsigInfoProvider = new Java14GenericSignatureInformationProvider();

	/**
	 * If true then only runtime visible annotations have been resolved via reflection. If class retention
	 * annotations are also required (later) then the cache will have to be rebuilt using a more detailed
	 * dig into the class file.
	 */
	private boolean onlyRuntimeAnnotationsCached;

	private Member reflectMember;

	public ReflectionBasedResolvedMemberImpl(MemberKind kind, UnresolvedType declaringType, int modifiers,
			UnresolvedType returnType, String name, UnresolvedType[] parameterTypes, Member reflectMember) {
		super(kind, declaringType, modifiers, returnType, name, parameterTypes);
		this.reflectMember = reflectMember;
	}

	public ReflectionBasedResolvedMemberImpl(MemberKind kind, UnresolvedType declaringType, int modifiers,
			UnresolvedType returnType, String name, UnresolvedType[] parameterTypes, UnresolvedType[] checkedExceptions,
			Member reflectMember) {
		super(kind, declaringType, modifiers, returnType, name, parameterTypes, checkedExceptions);
		this.reflectMember = reflectMember;
	}

	public ReflectionBasedResolvedMemberImpl(MemberKind kind, UnresolvedType declaringType, int modifiers,
			UnresolvedType returnType, String name, UnresolvedType[] parameterTypes, UnresolvedType[] checkedExceptions,
			ResolvedMember backingGenericMember, Member reflectMember) {
		super(kind, declaringType, modifiers, returnType, name, parameterTypes, checkedExceptions, backingGenericMember);
		this.reflectMember = reflectMember;
	}

	public ReflectionBasedResolvedMemberImpl(MemberKind kind, UnresolvedType declaringType, int modifiers, String name,
			String signature, Member reflectMember) {
		super(kind, declaringType, modifiers, name, signature);
		this.reflectMember = reflectMember;
	}

	public Member getMember() {
		return this.reflectMember;
	}

	public void setGenericSignatureInformationProvider(GenericSignatureInformationProvider gsigProvider) {
		this.gsigInfoProvider = gsigProvider;
	}

	@Override
	public UnresolvedType[] getGenericParameterTypes() {
		return this.gsigInfoProvider.getGenericParameterTypes(this);
	}

	@Override
	public UnresolvedType getGenericReturnType() {
		return this.gsigInfoProvider.getGenericReturnType(this);
	}

	@Override
	public boolean isSynthetic() {
		return this.gsigInfoProvider.isSynthetic(this);
	}

	@Override
	public boolean isVarargsMethod() {
		return this.gsigInfoProvider.isVarArgs(this);
	}

	@Override
	public boolean isBridgeMethod() {
		return this.gsigInfoProvider.isBridge(this);
	}

	public void setAnnotationFinder(AnnotationFinder finder) {
		this.annotationFinder = finder;
	}

	@Override
	public boolean hasAnnotation(UnresolvedType ofType) {
		boolean areRuntimeRetentionAnnotationsSufficient = false;
		if (ofType instanceof ResolvedType) {
			areRuntimeRetentionAnnotationsSufficient = ((ResolvedType)ofType).isAnnotationWithRuntimeRetention();
		}
		unpackAnnotations(areRuntimeRetentionAnnotationsSufficient);
		return super.hasAnnotation(ofType);
	}

	@Override
	public boolean hasAnnotations() {
		unpackAnnotations(false);
		return super.hasAnnotations();
	}

	@Override
	public ResolvedType[] getAnnotationTypes() {
		unpackAnnotations(false);
		return super.getAnnotationTypes();
	}

	@Override
	public AnnotationAJ getAnnotationOfType(UnresolvedType ofType) {
		unpackAnnotations(false);
		if (annotationFinder == null || annotationTypes == null) {
			return null;
		}
		for (ResolvedType type : annotationTypes) {
			if (type.getSignature().equals(ofType.getSignature())) {
				return annotationFinder.getAnnotationOfType(ofType, reflectMember);
			}
		}
		return null;
	}

	@Override
	public String getAnnotationDefaultValue() {
		if (annotationFinder == null) {
			return null;
		}
		return annotationFinder.getAnnotationDefaultValue(reflectMember);
	}

	@Override
	public ResolvedType[][] getParameterAnnotationTypes() {
		if (parameterAnnotationTypes == null && annotationFinder != null) {
			parameterAnnotationTypes = annotationFinder.getParameterAnnotationTypes(reflectMember);
		}
		return parameterAnnotationTypes;
	}

	private void unpackAnnotations(boolean areRuntimeRetentionAnnotationsSufficient) {
		if (annotationFinder != null && (annotationTypes == null || (!areRuntimeRetentionAnnotationsSufficient && onlyRuntimeAnnotationsCached))) {
			annotationTypes = annotationFinder.getAnnotations(reflectMember, areRuntimeRetentionAnnotationsSufficient);
			onlyRuntimeAnnotationsCached = areRuntimeRetentionAnnotationsSufficient;
		}
	}
}