/*
* 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.harmony.beans;
import java.beans.DefaultPersistenceDelegate;
import java.beans.PersistenceDelegate;
import java.util.HashMap;
import java.util.Map;
import java.util.StringTokenizer;
public final class DefaultPersistenceDelegatesFactory {
private static Map<String, PersistenceDelegate> persistenceDelegates = new HashMap<String, PersistenceDelegate>();
private static PersistenceDelegate createPersistenceDelegate(Class<?> type) {
if (type == null) {
return new NullPersistenceDelegate();
}
PersistenceDelegate pd = null;
try {
String className = createDefaultNameForPersistenceDelegateClass(type);
pd = (PersistenceDelegate) Class.forName(className, true,
type.getClassLoader()).newInstance();
} catch (Exception e) {
Class<?> ancestor = type.getSuperclass();
while (pd == null && ancestor != null) {
try {
String className = createDefaultNameForPersistenceDelegateClass(ancestor);
pd = (PersistenceDelegate) Class.forName(className, true,
type.getClassLoader()).newInstance();
} catch (Exception e2) {
ancestor = ancestor.getSuperclass();
}
}
if (pd == null) {
pd = new DefaultPersistenceDelegate();
}
}
return pd;
}
public static PersistenceDelegate getPersistenceDelegate(Class<?> type) {
String className = (type == null) ? null : type.getName();
PersistenceDelegate result = persistenceDelegates.get(className);
if (result == null) {
if (type != null && type.isArray()) {
result = org.apache.harmony.beans.ArrayPersistenceDelegate
.getInstance();
} else {
result = createPersistenceDelegate(type);
persistenceDelegates.put(className, result);
}
}
return result;
}
private static String createDefaultNameForPersistenceDelegateClass(
Class<?> type) {
String typeName = type.getName();
StringTokenizer st = new StringTokenizer(typeName, "."); //$NON-NLS-1$
String className = ""; //$NON-NLS-1$
while (st.hasMoreElements()) {
String s = (String) st.nextElement();
className += "".equals(className) ? s : "_" + s; //$NON-NLS-1$ //$NON-NLS-2$
}
return "org.apache.harmony.beans." + className + "PersistenceDelegate"; //$NON-NLS-1$ //$NON-NLS-2$
}
}