Copyright (c) 2000, 2017 IBM Corporation and others.
This program and the accompanying materials
are made available under the terms of the Eclipse Public License 2.0
which accompanies this distribution, and is available at
https://www.eclipse.org/legal/epl-2.0/
SPDX-License-Identifier: EPL-2.0
Contributors:
    IBM Corporation - initial API and implementation
/*******************************************************************************
 * Copyright (c) 2000, 2017 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.jdt.internal.compiler.ast;

import org.eclipse.jdt.internal.compiler.ASTVisitor;
import org.eclipse.jdt.internal.compiler.ClassFile;
import org.eclipse.jdt.internal.compiler.CompilationResult;
import org.eclipse.jdt.internal.compiler.lookup.ClassScope;
import org.eclipse.jdt.internal.compiler.lookup.TypeBinding;
import org.eclipse.jdt.internal.compiler.parser.Parser;

public class AnnotationMethodDeclaration extends MethodDeclaration {

	public Expression defaultValue;
	public int extendedDimensions;

	
MethodDeclaration constructor comment.
/**
	 * MethodDeclaration constructor comment.
	 */
	public AnnotationMethodDeclaration(CompilationResult compilationResult) {
		super(compilationResult);
	}

	@Override
	public void generateCode(ClassFile classFile) {
		classFile.generateMethodInfoHeader(this.binding);
		int methodAttributeOffset = classFile.contentsOffset;
		int attributeNumber = classFile.generateMethodInfoAttributes(this.binding, this);
		classFile.completeMethodInfo(this.binding, methodAttributeOffset, attributeNumber);
	}

	@Override
	public boolean isAnnotationMethod() {

		return true;
	}

	@Override
	public boolean isMethod() {

		return false;
	}

	@Override
	public void parseStatements(Parser parser, CompilationUnitDeclaration unit) {
		// nothing to do
		// annotation type member declaration don't have any body
	}

	@Override
	public StringBuffer print(int tab, StringBuffer output) {

		printIndent(tab, output);
		printModifiers(this.modifiers, output);
		if (this.annotations != null) {
			printAnnotations(this.annotations, output);
			output.append(' ');
		}

		TypeParameter[] typeParams = typeParameters();
		if (typeParams != null) {
			output.append('<');
			int max = typeParams.length - 1;
			for (int j = 0; j < max; j++) {
				typeParams[j].print(0, output);
				output.append(", ");//$NON-NLS-1$
			}
			typeParams[max].print(0, output);
			output.append('>');
		}

		printReturnType(0, output).append(this.selector).append('(');
		if (this.arguments != null) {
			for (int i = 0; i < this.arguments.length; i++) {
				if (i > 0) output.append(", "); //$NON-NLS-1$
				this.arguments[i].print(0, output);
			}
		}
		output.append(')');
		if (this.thrownExceptions != null) {
			output.append(" throws "); //$NON-NLS-1$
			for (int i = 0; i < this.thrownExceptions.length; i++) {
				if (i > 0) output.append(", "); //$NON-NLS-1$
				this.thrownExceptions[i].print(0, output);
			}
		}

		if (this.defaultValue != null) {
			output.append(" default "); //$NON-NLS-1$
			this.defaultValue.print(0, output);
		}

		printBody(tab + 1, output);
		return output;
	}

	@Override
	public void resolveStatements() {

		super.resolveStatements();
		if (this.arguments != null || this.receiver != null) {
			this.scope.problemReporter().annotationMembersCannotHaveParameters(this);
		}
		if (this.typeParameters != null) {
			this.scope.problemReporter().annotationMembersCannotHaveTypeParameters(this);
		}
		if (this.extendedDimensions != 0) {
			this.scope.problemReporter().illegalExtendedDimensions(this);
		}
		if (this.binding == null) return;
		TypeBinding returnTypeBinding = this.binding.returnType;
		if (returnTypeBinding != null) {

			// annotation methods can only return base types, String, Class, enum type, annotation types and arrays of these
			checkAnnotationMethodType: {
				TypeBinding leafReturnType = returnTypeBinding.leafComponentType();
				if (returnTypeBinding.dimensions() <= 1) { // only 1-dimensional array permitted
					switch (leafReturnType.erasure().id) {
						case T_byte :
						case T_short :
						case T_char :
						case T_int :
						case T_long :
						case T_float :
						case T_double :
						case T_boolean :
						case T_JavaLangString :
						case T_JavaLangClass :
							break checkAnnotationMethodType;
					}
					if (leafReturnType.isEnum() || leafReturnType.isAnnotationType())
						break checkAnnotationMethodType;
				}
				this.scope.problemReporter().invalidAnnotationMemberType(this);
			}
			if (this.defaultValue != null) {
				MemberValuePair pair = new MemberValuePair(this.selector, this.sourceStart, this.sourceEnd, this.defaultValue);
				pair.binding = this.binding;
				if (pair.value.resolvedType == null)
					pair.resolveTypeExpecting(this.scope, returnTypeBinding);
				this.binding.setDefaultValue(org.eclipse.jdt.internal.compiler.lookup.ElementValuePair.getValue(this.defaultValue));
			} else { // let it know it does not have a default value so it won't try to find it
				this.binding.setDefaultValue(null);
			}
		}
	}

	@Override
	public void traverse(
		ASTVisitor visitor,
		ClassScope classScope) {

		if (visitor.visit(this, classScope)) {
			if (this.annotations != null) {
				int annotationsLength = this.annotations.length;
				for (int i = 0; i < annotationsLength; i++)
					this.annotations[i].traverse(visitor, this.scope);
			}
			if (this.returnType != null) {
				this.returnType.traverse(visitor, this.scope);
			}
			if (this.defaultValue != null) {
				this.defaultValue.traverse(visitor, this.scope);
			}
		}
		visitor.endVisit(this, classScope);
	}
}