/*
* JBoss, Home of Professional Open Source
* Copyright 2005, JBoss Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jbpm.instantiation;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import org.dom4j.DocumentException;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.jbpm.JbpmException;
/**
* @author Alejandro Guizar
*/
class InstantiatorUtil {
private InstantiatorUtil() {
// hide default constructor to prevent instantiation
}
public static <T> T instantiate(Class<T> type) {
try {
return type.newInstance();
}
catch (InstantiationException e) {
throw new JbpmException("could not instantiate " + type, e);
}
catch (IllegalAccessException e) {
throw new JbpmException(type + " is inaccessible", e);
}
}
public static <T, C> T instantiate(Class<T> type, Class<C> configType, C config) {
try {
Constructor<T> constructor = type.getDeclaredConstructor(configType);
constructor.setAccessible(true);
return constructor.newInstance(config);
}
catch (NoSuchMethodException e) {
throw new JbpmException(type
+ " does not have a "
+ config.getClass().getSimpleName()
+ " constructor", e);
}
catch (InstantiationException e) {
throw new JbpmException("could not instantiate " + type, e);
}
catch (IllegalAccessException e) {
throw new JbpmException(type + " is inaccessible", e);
}
catch (IllegalArgumentException e) {
throw new JbpmException(type + " cannot be constructed with value " + config, e);
}
catch (InvocationTargetException e) {
throw new JbpmException("constructor for " + type + " threw exception", e.getCause());
}
}
public static Element parseConfiguration(String config) {
Element element = null;
try {
element = DocumentHelper.parseText("<action>" + config + "</action>").getRootElement();
}
catch (DocumentException e) {
throw new JbpmException("failed to parse configuration: " + config, e);
}
return element;
}
}