Author: oheger
Date: Sun Oct 27 09:59:29 2013
New Revision: 1536077
URL: http://svn.apache.org/r1536077
Log:
Added new DynaBeanPropertyMapDecorator.
This is a new decorator class providing Map-like access to a DynaBean which
uses the correct generic type parameters <String, Object>. It will be used
internally by DynaBean implementations to provide a Map-view on their data.
Added:
commons/proper/beanutils/branches/java5/src/main/java/org/apache/commons/beanutils/DynaBeanPropertyMapDecorator.java
Added:
commons/proper/beanutils/branches/java5/src/main/java/org/apache/commons/beanutils/DynaBeanPropertyMapDecorator.java
URL:
http://svn.apache.org/viewvc/commons/proper/beanutils/branches/java5/src/main/java/org/apache/commons/beanutils/DynaBeanPropertyMapDecorator.java?rev=1536077&view=auto
==============================================================================
---
commons/proper/beanutils/branches/java5/src/main/java/org/apache/commons/beanutils/DynaBeanPropertyMapDecorator.java
(added)
+++
commons/proper/beanutils/branches/java5/src/main/java/org/apache/commons/beanutils/DynaBeanPropertyMapDecorator.java
Sun Oct 27 09:59:29 2013
@@ -0,0 +1,92 @@
+/*
+ * 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.commons.beanutils;
+
+/**
+ * <p>Decorates a {@link DynaBean} to provide <code>Map</code> behavior.</p>
+ *
+ * <p>The motivation for this implementation is to provide access to {@link
DynaBean}
+ * properties in technologies that are unaware of BeanUtils and {@link
DynaBean}s -
+ * such as the expression languages of JSTL and JSF.</p>
+ *
+ * <p>This can be achieved either by wrapping the {@link DynaBean} prior to
+ * providing it to the technology to process or by providing a
<code>Map</code>
+ * accessor method on the DynaBean implementation:
+ * <pre><code>
+ * public Map<String, Object> getMap() {
+ * return new DynaBeanPropertyMapDecorator(this);
+ * }</code></pre>
+ * </ul>
+ * </p>
+ *
+ * <p>This, for example, could be used in JSTL in the following way to access
+ * a DynaBean's <code>fooProperty</code>:
+ * <ul><li><code>${myDynaBean.<b>map</b>.fooProperty}</code></li></ul>
+ * </p>
+ *
+ * <h3>Usage</h3>
+ *
+ * <p>To decorate a {@link DynaBean} simply instantiate this class with the
+ * target {@link DynaBean}:</p>
+ *
+ * <ul><li><code>Map<String, Object> fooMap = new
DynaBeanPropertyMapDecorator(fooDynaBean);</code></li></ul>
+ *
+ * <p>The above example creates a <b><i>read only</i></b> <code>Map</code>.
+ * To create a <code>Map</code> which can be modified, construct a
+ * <code>DynaBeanPropertyMapDecorator</code> with the <b><i>read
only</i></b>
+ * attribute set to <code>false</code>:</p>
+ *
+ * <ul><li><code>Map<String, Object> fooMap = new
DynaBeanPropertyMapDecorator(fooDynaBean, false);</code></li></ul>
+ *
+ * <h3>Limitations</h3>
+ * <p>In this implementation the <code>entrySet()</code>, <code>keySet()</code>
+ * and <code>values()</code> methods create an <b><i>unmodifiable</i></b>
+ * <code>Set</code> and it does not support the Map's <code>clear()</code>
+ * and <code>remove()</code> operations.</p>
+ *
+ * @since BeanUtils 1.9.0
+ * @version $Id$
+ */
+public class DynaBeanPropertyMapDecorator extends
BaseDynaBeanMapDecorator<String> {
+ /**
+ * Construct a Map for the specified {@link DynaBean}.
+ *
+ * @param dynaBean The dyna bean being decorated
+ * @param readOnly <code>true</code> if the Map is read only
+ * otherwise <code>false</code>
+ * @throws IllegalArgumentException if the {@link DynaBean} is null.
+ */
+ public DynaBeanPropertyMapDecorator(DynaBean dynaBean, boolean readOnly) {
+ super(dynaBean, readOnly);
+ }
+
+ /**
+ * Constructs a read only Map for the specified
+ * {@link DynaBean}.
+ *
+ * @param dynaBean The dyna bean being decorated
+ * @throws IllegalArgumentException if the {@link DynaBean} is null.
+ */
+ public DynaBeanPropertyMapDecorator(DynaBean dynaBean) {
+ super(dynaBean);
+ }
+
+ @Override
+ protected String convertKey(String propertyName) {
+ return propertyName;
+ }
+}
