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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2012 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:
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 */

package org.glassfish.ejb.deployment.node;

import java.util.Map;
import java.util.logging.Level;

import com.sun.enterprise.deployment.node.DeploymentDescriptorNode;
import com.sun.enterprise.deployment.node.MethodNode;
import com.sun.enterprise.deployment.node.XMLElement;
import com.sun.enterprise.deployment.util.DOLUtils;
import org.glassfish.deployment.common.Descriptor;
import org.glassfish.ejb.deployment.EjbTagNames;
import org.glassfish.ejb.deployment.descriptor.QueryDescriptor;
import org.w3c.dom.Node;

/**
 * This class is responsible for handling the query element
 *
 * @author  Jerome Dochez
 * @version 
 */
public class QueryNode extends DeploymentDescriptorNode {

    private QueryDescriptor descriptor;

    public QueryNode() {
        super();
        registerElementHandler(new XMLElement(EjbTagNames.QUERY_METHOD), 
                                                                MethodNode.class, "setQueryMethodDescriptor");                 
    }

    @Override
    public QueryDescriptor getDescriptor() {
        if (descriptor == null) descriptor = new QueryDescriptor();
        return descriptor;        
    }
 
    @Override
    protected Map getDispatchTable() {
        // no need to be synchronized for now
        Map table = super.getDispatchTable();
        table.put(EjbTagNames.EJB_QL, "setQuery");    
        return table;
    }

    @Override
    public void setElementValue(XMLElement element, String value) {    
        if (EjbTagNames.QUERY_RESULT_TYPE_MAPPING.equals(element.getQName())) {
            if (EjbTagNames.QUERY_REMOTE_TYPE_MAPPING.equals(value)) {
                descriptor.setHasRemoteReturnTypeMapping();
            } else if (EjbTagNames.QUERY_LOCAL_TYPE_MAPPING.equals(value)) {            
                descriptor.setHasLocalReturnTypeMapping();
            } else {
                DOLUtils.getDefaultLogger().log(Level.SEVERE, "enterprise.deployment.backend.addDescriptorFailure",
                                new Object[] {((Descriptor) getParentNode().getDescriptor()).getName() , value});
            }
        } else {
            super.setElementValue(element, value);
        }
    }

    @Override
    public Node writeDescriptor(Node parent, String nodeName, QueryDescriptor descriptor) {        
        Node queryNode = super.writeDescriptor(parent, nodeName, descriptor);

        writeLocalizedDescriptions(queryNode, descriptor);
                
        // query-method
        MethodNode methodNode = new MethodNode();
        methodNode.writeQueryMethodDescriptor(queryNode, EjbTagNames.QUERY_METHOD, 
                                                                         descriptor.getQueryMethodDescriptor());
        
        if (descriptor.getHasRemoteReturnTypeMapping()) {            
            appendTextChild(queryNode, EjbTagNames.QUERY_RESULT_TYPE_MAPPING, 
                                                    EjbTagNames.QUERY_REMOTE_TYPE_MAPPING);     
        } else {
	    if (descriptor.getHasLocalReturnTypeMapping()) {
                appendTextChild(queryNode, EjbTagNames.QUERY_RESULT_TYPE_MAPPING,
                                                    EjbTagNames.QUERY_LOCAL_TYPE_MAPPING);
            }
	}
        // ejbql element is mandatory.  If no EJB QL query has been
        // specified for the method, the xml element will be empty
        String ejbqlText = descriptor.getIsEjbQl() ? descriptor.getQuery() : "";        
        Node child = appendChild(queryNode, EjbTagNames.EJB_QL);
        child.appendChild(getOwnerDocument(child).createTextNode(ejbqlText));          
        
        return queryNode;
    }
}