/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. 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.jackrabbit.core.config;
import org.apache.commons.collections.BeanMap;
import java.util.Iterator;
import java.util.Properties;
/**
* Bean configuration class. BeanConfig instances contain the class name
* and property information required to instantiate a class that conforms
* with the JavaBean conventions.
*/
public class BeanConfig {
/**
* The class name of the configured bean.
*/
private final String className;
/**
* The initial properties of the configured bean.
*/
private final Properties properties;
/**
* Creates a bean configuration. Note that a copy of the given
* bean properties is stored as a part of the created configuration
* object. Thus the caller is free to modify the given properties
* once the configuration object has been created.
*
* @param className class name of the bean
* @param properties initial properties of the bean
*/
public BeanConfig(String className, Properties properties) {
this.className = className;
this.properties = (Properties) properties.clone();
}
/**
* Copies a bean configuration.
*
* @param config the configuration to be copied
*/
public BeanConfig(BeanConfig config) {
this(config.getClassName(), config.getParameters());
}
/**
* Returns the class name of the configured bean.
*
* @return class name of the bean
*/
public String getClassName() {
return className;
}
/**
* Returns the initial properties of the configured bean.
*
* @return initial properties of the bean
*/
public Properties getParameters() {
return properties;
}
/**
* Creates a new instance of the configured bean class.
*
* @return new bean instance
* @throws ConfigurationException on bean configuration errors
*/
public Object newInstance() throws ConfigurationException {
try {
Object object = Class.forName(getClassName()).newInstance();
BeanMap map = new BeanMap(object);
Iterator iterator = map.keyIterator();
while (iterator.hasNext()) {
String name = (String) iterator.next();
String value = properties.getProperty(name);
if (value != null) {
map.put(name, properties.getProperty(name));
}
}
return object;
} catch (ClassNotFoundException e) {
throw new ConfigurationException(
"Configured bean implementation class " + getClassName()
+ " was not found.", e);
} catch (InstantiationException e) {
throw new ConfigurationException(
"Configured bean implementation class " + getClassName()
+ " can not be instantiated.", e);
} catch (IllegalAccessException e) {
throw new ConfigurationException(
"Configured bean implementation class " + getClassName()
+ " is protected.", e);
}
}
}