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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 IBM Corporation.
 * 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
 *      Andy Clement wired up to back end
 * ******************************************************************/

package org.aspectj.ajdt.internal.compiler.ast;

import org.aspectj.org.eclipse.jdt.internal.compiler.CompilationResult;
import org.aspectj.org.eclipse.jdt.internal.compiler.ast.Annotation;
import org.aspectj.org.eclipse.jdt.internal.compiler.ast.MarkerAnnotation;
import org.aspectj.org.eclipse.jdt.internal.compiler.ast.TypeDeclaration;
import org.aspectj.org.eclipse.jdt.internal.compiler.flow.FlowContext;
import org.aspectj.org.eclipse.jdt.internal.compiler.flow.FlowInfo;
import org.aspectj.org.eclipse.jdt.internal.compiler.lookup.ClassScope;
import org.aspectj.org.eclipse.jdt.internal.compiler.lookup.TagBits;
import org.aspectj.weaver.patterns.DeclareAnnotation;

public class DeclareAnnotationDeclaration extends DeclareDeclaration {

	private Annotation annotation;
	private boolean isRemover = false;

	public DeclareAnnotationDeclaration(CompilationResult result, DeclareAnnotation symbolicDeclare, Annotation annotation) {
		super(result, symbolicDeclare);
		this.annotation = annotation;

		addAnnotation(annotation);
		if (symbolicDeclare == null) {
			return; // there is an error that will already be getting reported (e.g. incorrect pattern on decaf/decac)
		}
		this.isRemover = symbolicDeclare.isRemover();
		symbolicDeclare.setAnnotationString(annotation.toString());
		symbolicDeclare.setAnnotationLocation(annotation.sourceStart, annotation.sourceEnd);
	}

	@Override
	public void analyseCode(ClassScope classScope, FlowContext flowContext, FlowInfo flowInfo) {
		super.analyseCode(classScope, flowContext, flowInfo);

		if (isRemover) {
			if (((DeclareAnnotation) declareDecl).getKind() != DeclareAnnotation.AT_FIELD) {
				classScope.problemReporter().signalError(this.sourceStart(), this.sourceEnd,
						"Annotation removal only supported for declare @field (compiler limitation)");
			}
			else if (isRemover && !(annotation instanceof MarkerAnnotation)) {
				classScope.problemReporter().signalError(this.sourceStart(), this.sourceEnd,
						"Annotation removal does not allow values to be specified for the annotation (compiler limitation)");
			}
		}
		long bits = annotation.resolvedType.getAnnotationTagBits();

		if ((bits & TagBits.AnnotationTarget) != 0) {
			// The annotation is stored against a method. For declare @type we need to
			// confirm the annotation targets the right types. Earlier checking will
			// have not found this problem because an annotation for target METHOD will
			// not be reported on as we *do* store it against a method in this case
			DeclareAnnotation.Kind k = ((DeclareAnnotation) declareDecl).getKind();
			if (k.equals(DeclareAnnotation.AT_TYPE)) {
				if ((bits & TagBits.AnnotationForMethod) != 0) {
					classScope.problemReporter().disallowedTargetForAnnotation(annotation);
				}
			}
			if (k.equals(DeclareAnnotation.AT_FIELD)) {
				if ((bits & TagBits.AnnotationForMethod) != 0) {
					classScope.problemReporter().disallowedTargetForAnnotation(annotation);
				}
			}
		}

	}

	public Annotation getDeclaredAnnotation() {
		return annotation;
	}

	protected boolean shouldDelegateCodeGeneration() {
		return true; // declare annotation needs a method to be written out.
	}

	protected boolean shouldBeSynthetic() {
		return false;
	}

	private void addAnnotation(Annotation ann) {
		if (this.annotations == null) {
			this.annotations = new Annotation[1];
		}
		else {
			Annotation[] old = this.annotations;
			this.annotations = new Annotation[old.length + 1];
			System.arraycopy(old, 0, this.annotations, 1, old.length);
		}
		this.annotations[0] = ann;
	}

	public void postParse(TypeDeclaration typeDec) {
		super.postParse(typeDec);
		if (declareDecl != null) {
			((DeclareAnnotation) declareDecl).setAnnotationMethod(new String(selector));
		}
	}

	public boolean isRemover() {
		return isRemover;
	}
}