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Struts example source code file (MapAdapter.java)

This example Struts source code file (MapAdapter.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 - Struts tags/keywords

abstractadapterelement, adapterfactory, adapternode, arraylist, dom, entryelement, entryelement, list, list, map, map, mapadapter, object, object, string, util

The Struts MapAdapter.java source code

/*
 * $Id: MapAdapter.java 651946 2008-04-27 13:41:38Z apetrelli $
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.struts2.views.xslt;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.w3c.dom.Node;

/**
 * MapAdapter adapters a java.util.Map type to an XML DOM with the following
 * structure:
 * <pre>
 *  <myMap>
 *      <entry>
 *          <key>...
 *          <value>...
 *      </entry>
 *      ...
 *  </myMap>
 * </pre>
 */
public class MapAdapter extends AbstractAdapterElement {

    public MapAdapter() { }

    public MapAdapter(AdapterFactory adapterFactory, AdapterNode parent, String propertyName, Map value) {
        setContext( adapterFactory, parent, propertyName, value );
    }

    public Map map() {
        return (Map)getPropertyValue();
    }

    protected List<Node> buildChildAdapters() {
        List<Node> children = new ArrayList(map().entrySet().size());

        for (Object o : map().entrySet()) {
            Map.Entry entry = (Map.Entry) o;
            Object key = entry.getKey();
            Object value = entry.getValue();
            EntryElement child = new EntryElement(
                    getAdapterFactory(), this, "entry", key, value);
            children.add(child);
        }

        return children;
    }

    static class EntryElement extends AbstractAdapterElement {
        Object key, value;

        public EntryElement(  AdapterFactory adapterFactory,
                              AdapterNode parent, String propertyName, Object key, Object value ) {
            setContext( adapterFactory, parent, propertyName, null/*we have two values*/ );
            this.key = key;
            this.value = value;
        }

        protected List<Node> buildChildAdapters() {
            List<Node> children = new ArrayList();
            children.add( getAdapterFactory().adaptNode( this, "key", key ) );
            children.add( getAdapterFactory().adaptNode( this, "value", value ) );
            return children;
        }
    }
}

Other Struts examples (source code examples)

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