001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *     http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017
018package org.apache.commons.jxpath;
019
020import java.util.Iterator;
021import java.util.Map;
022import java.util.Set;
023
024/**
025 * Implements the DynamicPropertyHandler interface for {@link java.util.Map}.
026 */
027public class MapDynamicPropertyHandler implements DynamicPropertyHandler {
028
029    /**
030     * Constructs a new instance.
031     */
032    public MapDynamicPropertyHandler() {
033        // empty
034    }
035
036    @Override
037    public Object getProperty(final Object object, final String propertyName) {
038        return ((Map) object).get(propertyName);
039    }
040
041    @Override
042    public String[] getPropertyNames(final Object object) {
043        final Map map = (Map) object;
044        final Set set = map.keySet();
045        final String[] names = new String[set.size()];
046        final Iterator it = set.iterator();
047        for (int i = 0; i < names.length; i++) {
048            names[i] = String.valueOf(it.next());
049        }
050        return names;
051    }
052
053    @Override
054    public void setProperty(final Object object, final String propertyName, final Object value) {
055        ((Map) object).put(propertyName, value);
056    }
057}