/*******************************************************************************
 * Copyright (c) 2009 Shane Clarke.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *    Shane Clarke - initial API and implementation
 *******************************************************************************/
package org.eclipse.jst.ws.internal.jaxws.core.annotations.validation;

import java.util.Collection;

import javax.jws.WebMethod;
import javax.jws.WebService;

import org.eclipse.jst.ws.annotations.core.processor.AbstractAnnotationProcessor;
import org.eclipse.jst.ws.annotations.core.utils.AnnotationUtils;
import org.eclipse.jst.ws.internal.jaxws.core.JAXWSCoreMessages;

import com.sun.mirror.declaration.AnnotationMirror;
import com.sun.mirror.declaration.AnnotationTypeDeclaration;
import com.sun.mirror.declaration.Declaration;
import com.sun.mirror.declaration.MethodDeclaration;
import com.sun.mirror.declaration.TypeDeclaration;

public class WebMethodCheckForWebServiceRule extends AbstractAnnotationProcessor {

    @Override
    public void process() {
         AnnotationTypeDeclaration annotationDeclaration = (AnnotationTypeDeclaration) environment
                .getTypeDeclaration(WebMethod.class.getName());

        Collection<Declaration> annotatedTypes = environment
                .getDeclarationsAnnotatedWith(annotationDeclaration);

        for (Declaration declaration : annotatedTypes) {
            if (declaration instanceof MethodDeclaration) {
                Collection<AnnotationMirror> annotationMirrors = declaration.getAnnotationMirrors();
                for (AnnotationMirror mirror : annotationMirrors) {
                    if (mirror.getAnnotationType().getDeclaration().equals(annotationDeclaration)
                            && !checkForWebServiceAnnotation(((MethodDeclaration) declaration).getDeclaringType())) {
                        printFixableError(mirror.getPosition(),
                                JAXWSCoreMessages.WEBMETHOD_ONLY_SUPPORTED_ON_CLASSES_WITH_WEBSERVICE);
                    }
                }
            }
        }
    }

    private boolean checkForWebServiceAnnotation(TypeDeclaration typeDeclaration) {
        return AnnotationUtils.getAnnotation(typeDeclaration, WebService.class) != null;
    }
}