/*
* 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.configuration;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.jbpm.context.exe.Converter;
import org.jbpm.context.exe.JbpmType;
import org.jbpm.context.exe.JbpmTypeMatcher;
import org.jbpm.context.exe.VariableInstance;
import org.jbpm.db.hibernate.Converters;
import org.jbpm.util.ClassLoaderUtil;
import org.jbpm.util.XmlUtil;
import org.w3c.dom.Element;
public class JbpmTypeObjectInfo extends AbstractObjectInfo {
private static final long serialVersionUID = 1L;
ObjectInfo typeMatcherObjectInfo = null;
Converter<?, ?> converter = null;
Class<? extends VariableInstance> variableInstanceClass = null;
public JbpmTypeObjectInfo(Element jbpmTypeElement, ObjectFactoryParser objectFactoryParser) {
super(jbpmTypeElement, objectFactoryParser);
try {
Element typeMatcherElement = XmlUtil.element(jbpmTypeElement, "matcher");
if (typeMatcherElement == null) {
throw new ConfigurationException("matcher element is required in <jbpm-type>: "
+ XmlUtil.toString(jbpmTypeElement));
}
Element typeMatcherBeanElement = XmlUtil.element(typeMatcherElement);
typeMatcherObjectInfo = objectFactoryParser.parse(typeMatcherBeanElement);
Element converterElement = XmlUtil.element(jbpmTypeElement, "converter");
if (converterElement != null) {
if (!converterElement.hasAttribute("class")) {
throw new ConfigurationException("class attribute is required in <converter>: "
+ XmlUtil.toString(jbpmTypeElement));
}
String converterClassName = converterElement.getAttribute("class");
converter = Converters.getConverterByClassName(converterClassName);
}
Element variableInstanceElement = XmlUtil.element(jbpmTypeElement, "variable-instance");
if (!variableInstanceElement.hasAttribute("class")) {
throw new ConfigurationException("class attribute is required in <variable-instance>: "
+ XmlUtil.toString(jbpmTypeElement));
}
String variableInstanceClassName = variableInstanceElement.getAttribute("class");
variableInstanceClass = ClassLoaderUtil.classForName(variableInstanceClassName).asSubclass(
VariableInstance.class);
}
catch (ConfigurationException e) {
throw e;
}
catch (RuntimeException e) {
// Client probably does not need support for this type and omitted the dependency
// So let us log and ignore
log.debug("could not instantiate jbpm type '" + XmlUtil.toString(jbpmTypeElement) + "': " + e);
// make sure this JbpmType is ignored by always returning false in the JbpmTypeMatcher
typeMatcherObjectInfo = NoObjectInfo.getInstance();
converter = null;
variableInstanceClass = null;
}
}
static class NoObjectInfo implements ObjectInfo {
private static final long serialVersionUID = 1L;
private static ObjectInfo instance;
private NoObjectInfo() {
// hide default constructor to prevent instantiation
}
public boolean hasName() {
return false;
}
public String getName() {
return null;
}
public boolean isSingleton() {
return true;
}
public Object createObject(ObjectFactoryImpl objectFactory) {
return NoTypeMatcher.getInstance();
}
static ObjectInfo getInstance() {
if (instance == null) {
instance = new NoObjectInfo();
}
return instance;
}
}
static class NoTypeMatcher implements JbpmTypeMatcher {
private static final long serialVersionUID = 1L;
static final JbpmTypeMatcher instance = new NoTypeMatcher();
private NoTypeMatcher() {
// hide default constructor to prevent instantiation
}
public boolean matches(Object value) {
return false;
}
static JbpmTypeMatcher getInstance() {
return instance;
}
}
public Object createObject(ObjectFactoryImpl objectFactory) {
JbpmTypeMatcher jbpmTypeMatcher = (JbpmTypeMatcher) objectFactory.createObject(typeMatcherObjectInfo);
return new JbpmType(jbpmTypeMatcher, converter, variableInstanceClass);
}
private static Log log = LogFactory.getLog(JbpmTypeObjectInfo.class);
}