/*
* Copyright 2004, 2005, 2006 Odysseus Software GmbH
*
* Licensed 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 de.odysseus.calyxo.base.conf.impl;
import java.lang.reflect.Constructor;
import de.odysseus.calyxo.base.conf.ConfigException;
import de.odysseus.calyxo.base.conf.ConstructorConfig;
/**
* Constructor configuration implementation.
*
* @author Christoph Beck
*/
public class ConstructorConfigImpl extends CallableConfigImpl implements ConstructorConfig {
/*
* (non-Javadoc)
* @see de.odysseus.calyxo.base.conf.impl.ConfigImpl#_getElementName()
*/
protected String _getElementName() {
return "constructor";
}
/*
* (non-Javadoc)
* @see de.odysseus.calyxo.base.conf.ConstructorConfig#invoke(java.lang.Class)
*/
public Object invoke(Class clazz, ClassLoader loader) throws ConfigException {
Object[] rawArgs = evalArgs(loader);
Constructor[] constructors = clazz.getConstructors();
for (int i = 0; i < constructors.length; i++) {
Object[] coercedArgs = coerce(rawArgs, constructors[i].getParameterTypes());
if (coercedArgs != null) {
try {
return constructors[i].newInstance(coercedArgs);
} catch (Exception e) {
throw new ConfigException(
"Could not invoke constructor in " + toInlineString(), e);
}
}
}
throw new ConfigException(
"Could not find constructor in " + toInlineString());
}
}