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Glassfish example source code file (AbstractAttributeHandler.java)

This example Glassfish source code file (AbstractAttributeHandler.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Glassfish tags/keywords

abstractattributehandler, annotatedelementhandler, annotation, annotation, annotationinfo, annotationprocessorexception, componentcontext, ejbbundlecontext, ejbbundlecontext, ejbcontext, ejbcontext, ejbinterceptorcontext, ejbinterceptorcontext, handlerprocessingresult, handlerprocessingresult, log, logging, reflection, util

The Glassfish AbstractAttributeHandler.java source code

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2010 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
 *
 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */

package org.glassfish.ejb.deployment.annotation.handlers;

import com.sun.enterprise.deployment.annotation.handlers.*;
import com.sun.enterprise.deployment.EjbDescriptor;
import com.sun.enterprise.deployment.MethodDescriptor;
import com.sun.enterprise.deployment.annotation.context.*;
import org.glassfish.apf.AnnotatedElementHandler;
import org.glassfish.apf.AnnotationInfo;
import org.glassfish.apf.AnnotationProcessorException;
import org.glassfish.apf.HandlerProcessingResult;

import java.lang.annotation.Annotation;
import java.lang.annotation.ElementType;
import java.lang.reflect.AnnotatedElement;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.logging.Level;

/**
 * This is an abstract class encapsulate generic behaviour of annotation
 * handler applying on Ejb Class.  It will get the corresponding
 * EjbDescriptors associated to the annotation on the given Ejb Class
 * and then pass it to underlying processAnnotation method.
 * Concrete subclass handlers need to implement the following:
 *     public Class<? extends Annotation> getAnnotationType();
 *     protected HandlerProcessingResult processAnnotation(AnnotationInfo ainfo,
 *             EjbContext[] ejbContexts) throws AnnotationProcessorException;
 * It may also need to override the following:
 * a) if other annotations need to be processed prior to given annotation:
 *     public Class<? extends Annotation>[] getTypeDependencies();
 * b) if the given annotation can be processed while processing another
 *    annotation
 *     protected boolean isDelegatee();
 * c) if we need to process for interceptor
 *     protected HandlerProcessingResult processAnnotation(AnnotationInfo ainfo,
 *             EjbInterceptorContext ejbInterceptorContext)
 *             throws AnnotationProcessorException;
 * d) indicate the annotation support type inheritance
 *     protected boolean supportTypeIneritance();
 *
 * @author Shing Wai Chan
 */
public abstract class AbstractAttributeHandler extends AbstractHandler {
    /**
     * Process Annotation with given EjbContexts.
     * @param ainfo
     * @param ejbContexts
     * @return HandlerProcessingResult
     * @exception AnnotationProcessorException
     */
    protected abstract HandlerProcessingResult processAnnotation(
            AnnotationInfo ainfo, EjbContext[] ejbContexts)
            throws AnnotationProcessorException;

    /**
     * Process Annotation with given InteceptorContext.
     * @param ainfo
     * @param ejbInterceptorContext
     * @return HandlerProcessingResult
     * @exception AnnotationProcessorException
     */
    protected HandlerProcessingResult processAnnotation(
            AnnotationInfo ainfo, EjbInterceptorContext ejbInterceptorContext)
            throws AnnotationProcessorException {
        if (!isDelegatee()) {
            throw new UnsupportedOperationException();
        }
        return getDefaultProcessedResult();
    }

    /**
     * Process a particular annotation which type is the same as the
     * one returned by @see getAnnotationType(). All information
     * pertinent to the annotation and its context is encapsulated
     * in the passed AnnotationInfo instance.
     * This is a method in interface AnnotationHandler.
     *
     * @param ainfo the annotation information
     */
    public HandlerProcessingResult processAnnotation(AnnotationInfo ainfo) 
            throws AnnotationProcessorException {
        
        AnnotatedElement ae = ainfo.getAnnotatedElement();
        Annotation annotation = ainfo.getAnnotation();

        if (logger.isLoggable(Level.FINER)) {
            logger.finer("@process annotation " + annotation + " in " + ae);
        }

        AnnotatedElementHandler aeHandler = ainfo.getProcessingContext().getHandler();

        if (aeHandler instanceof EjbBundleContext) {
            EjbBundleContext ejbBundleContext = (EjbBundleContext)aeHandler;
            AnnotatedElementHandler aeh = ejbBundleContext.createContextForEjb();
            if (aeh != null) {
                aeHandler = aeh;
            } else {
                if (isDelegatee()) {
                    aeHandler = ejbBundleContext.createContextForEjbInterceptor();
                }
                if (aeHandler == null) {
                    return getInvalidAnnotatedElementHandlerResult(aeHandler, ainfo);
                }
            }
        }

        if (!supportTypeInheritance() &&
                ElementType.TYPE.equals(ainfo.getElementType()) &&
                aeHandler instanceof ComponentContext) {
            ComponentContext context = (ComponentContext)aeHandler;
            Class clazz = (Class)ainfo.getAnnotatedElement();
            if (!clazz.getName().equals(context.getComponentClassName())) {
                if (logger.isLoggable(Level.WARNING)) {
                    log(Level.WARNING, ainfo, 
                        localStrings.getLocalString(
                        "enterprise.deployment.annotation.handlers.typeinhernotsupp",
                        "The annotation symbol inheritance is not supported."));
                }
                return getDefaultProcessedResult();
            }
        }
                
        EjbContext[] ejbContexts = null;
        EjbInterceptorContext ejbInterceptorContext = null;
        if (aeHandler instanceof EjbContext) {
            EjbContext ejbContext = (EjbContext)aeHandler;
            ejbContexts = new EjbContext[] { ejbContext };
        } else if (aeHandler instanceof EjbsContext) {
            ejbContexts = ((EjbsContext)aeHandler).getEjbContexts();
        } else if (isDelegatee() && aeHandler instanceof EjbInterceptorContext) {
            ejbInterceptorContext = (EjbInterceptorContext)aeHandler;
        } else {
            return getInvalidAnnotatedElementHandlerResult(aeHandler, ainfo);
        }

        HandlerProcessingResult procResult = null;

        if (ejbInterceptorContext != null) {
            procResult = processAnnotation(ainfo, ejbInterceptorContext);
        } else {
            procResult = processAnnotation(ainfo, ejbContexts);
        }

        if (logger.isLoggable(Level.FINER)) {
            logger.finer("New annotation for " + annotation);
        }
        return procResult;
    }

    /**
     * This indicates whether the annotation can be processed by delegation
     * from the another annotation.
     */
    protected boolean isDelegatee() {
        return false;
    }

    /**
     * This indicates whether the annotation type should be processed for
     * type level in super-class.
     */
    protected boolean supportTypeInheritance() {
        return false;
    }
}

Other Glassfish examples (source code examples)

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