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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 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
 *
 * Contributors:
 *   Adrian Colyer			Initial implementation
 * ******************************************************************/
package org.aspectj.weaver.reflect;

import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.Member;
import java.lang.reflect.Method;
import java.lang.reflect.Type;

import org.aspectj.weaver.UnresolvedType;
import org.aspectj.weaver.World;

/**
 * Uses Java 1.5 reflection APIs to determine generic signatures
 */
public class Java15GenericSignatureInformationProvider implements
		GenericSignatureInformationProvider {

	private final World world;

	public Java15GenericSignatureInformationProvider(World forWorld) {
		this.world = forWorld;
	}

	/* (non-Javadoc)
	 * @see org.aspectj.weaver.reflect.GenericSignatureInformationProvider#getGenericParameterTypes(org.aspectj.weaver.reflect.ReflectionBasedResolvedMemberImpl)
	 */
	public UnresolvedType[] getGenericParameterTypes(
			ReflectionBasedResolvedMemberImpl resolvedMember) {
		JavaLangTypeToResolvedTypeConverter typeConverter = new JavaLangTypeToResolvedTypeConverter(world);
		Type[] pTypes = new Type[0];
		Member member = resolvedMember.getMember();
		if (member instanceof Method) {
			pTypes = ((Method)member).getGenericParameterTypes();
		} else if (member instanceof Constructor) {
			pTypes = ((Constructor)member).getGenericParameterTypes();
		}
		return typeConverter.fromTypes(pTypes);
	}

	/* (non-Javadoc)
	 * @see org.aspectj.weaver.reflect.GenericSignatureInformationProvider#getGenericReturnType(org.aspectj.weaver.reflect.ReflectionBasedResolvedMemberImpl)
	 */
	public UnresolvedType getGenericReturnType(
			ReflectionBasedResolvedMemberImpl resolvedMember) {
		JavaLangTypeToResolvedTypeConverter typeConverter = new JavaLangTypeToResolvedTypeConverter(world);
		Member member = resolvedMember.getMember();
		if (member instanceof Field) {
			return typeConverter.fromType(((Field)member).getGenericType());
		} else if (member instanceof Method) {
			return typeConverter.fromType(((Method)member).getGenericReturnType());
		} else if (member instanceof Constructor) {
			return typeConverter.fromType(((Constructor)member).getDeclaringClass());
		} else {
			throw new IllegalStateException("unexpected member type: " + member);
		}
	}

	/* (non-Javadoc)
	 * @see org.aspectj.weaver.reflect.GenericSignatureInformationProvider#isBridge()
	 */
	public boolean isBridge(ReflectionBasedResolvedMemberImpl resolvedMember) {
		Member member =  resolvedMember.getMember();
		if (member instanceof Method) {
			return ((Method)member).isBridge();
		} else {
			return false;
		}
	}

	/* (non-Javadoc)
	 * @see org.aspectj.weaver.reflect.GenericSignatureInformationProvider#isVarArgs()
	 */
	public boolean isVarArgs(ReflectionBasedResolvedMemberImpl resolvedMember) {
		Member member =  resolvedMember.getMember();
		if (member instanceof Method) {
			return ((Method)member).isVarArgs();
		} else if (member instanceof Constructor) {
			return ((Constructor)member).isVarArgs();
		} else {
			return false;
		}
	}

	/* (non-Javadoc)
	 * @see org.aspectj.weaver.reflect.GenericSignatureInformationProvider#isSynthetic()
	 */
	public boolean isSynthetic(ReflectionBasedResolvedMemberImpl resolvedMember) {
		Member member =  resolvedMember.getMember();
		return member.isSynthetic();
	}

}