001 /*
002 * Copyright 2001-2013 Stephen Colebourne
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016 package org.joda.beans.impl.map;
017
018 import java.util.HashMap;
019 import java.util.NoSuchElementException;
020 import java.util.Set;
021
022 import org.joda.beans.DynamicBean;
023 import org.joda.beans.MetaBean;
024 import org.joda.beans.MetaProperty;
025 import org.joda.beans.Property;
026 import org.joda.beans.impl.BasicProperty;
027
028 /**
029 * Implementation of a fully dynamic {@code Bean} based on an exposed {@code Map}.
030 * <p>
031 * Properties are dynamic, and can be added and removed at will from the map.
032 *
033 * @author Stephen Colebourne
034 */
035 public class MapBean extends HashMap<String, Object> implements DynamicBean {
036
037 /** Serialization version. */
038 private static final long serialVersionUID = 1L;
039
040 @Override
041 public MetaBean metaBean() {
042 return new MapMetaBean(this);
043 }
044
045 @Override
046 public Property<Object> property(String name) {
047 return BasicProperty.of(this, metaProperty(name));
048 }
049
050 MetaProperty<Object> metaProperty(String name) {
051 Object obj = get(name);
052 if (obj == null) {
053 throw new NoSuchElementException("Property not found: " + name);
054 }
055 return MapBeanMetaProperty.of(MapBean.this, name);
056 }
057
058 @Override
059 public Set<String> propertyNames() {
060 return keySet();
061 }
062
063 @Override
064 public void propertyDefine(String propertyName, Class<?> propertyType) {
065 // no need to define
066 }
067
068 @Override
069 public void propertyRemove(String propertyName) {
070 remove(propertyName);
071 }
072
073 //-----------------------------------------------------------------------
074 /**
075 * Returns a string that summarises the bean.
076 * <p>
077 * The string contains the class name and properties.
078 *
079 * @return a summary string, not null
080 */
081 @Override
082 public String toString() {
083 return getClass().getSimpleName() + super.toString();
084 }
085
086 }