/*
* Milyn - Copyright (C) 2006 - 2010
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License (version 2.1) as published by the Free Software
* Foundation.
*
* This library 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:
* http://www.gnu.org/licenses/lgpl.txt
*/
package org.milyn.persistence.config.ext;
import org.milyn.SmooksException;
import org.milyn.cdr.ConfigSearch;
import org.milyn.cdr.Parameter;
import org.milyn.cdr.SmooksConfigurationException;
import org.milyn.cdr.SmooksResourceConfiguration;
import org.milyn.cdr.annotation.ConfigParam;
import org.milyn.cdr.extension.ExtensionContext;
import org.milyn.container.ExecutionContext;
import org.milyn.delivery.dom.DOMVisitBefore;
import org.milyn.javabean.BeanInstanceCreator;
import org.w3c.dom.Element;
import java.util.List;
/**
* This resource tries to find a sensible default selector if no selector
* is set on the resource.
*
* It does this by searching for the resource that creates the bean which the current resource
* affects.
*
* For instance for the EntityInserter this means that it will set the selector to the same value
* as the bean creator that creates the bean that needs to be inserted.
*
* @author <a href="mailto:maurice.zeijen@smies.com">maurice.zeijen@smies.com</a>
*/
public class SetSelectorFromBeanCreator implements DOMVisitBefore {
@ConfigParam
private String selectorAttrName;
public void visitBefore(Element element, ExecutionContext executionContext) throws SmooksException {
ExtensionContext extensionContext = ExtensionContext.getExtensionContext(executionContext);
SmooksResourceConfiguration config = extensionContext.getResourceStack().peek();
if(config.getSelector() == null || config.getSelector().equals("none")) {
Parameter beanIdParam = config.getParameter("beanId");
String beanId = beanIdParam.getValue();
SmooksResourceConfiguration beanCreatorConfig = findBeanCreatorConfig(beanId, extensionContext);
if(beanCreatorConfig == null) {
throw new SmooksConfigurationException("No <jb:bean> configurations is found yet for beanId '" + beanId + "'. " +
"This can mean that no <jb:bean> is present that creates the bean with the bean id or that it is configured after the <" + element.getNodeName() + ">. " +
"In this case you must set the selector in the '" + selectorAttrName + "' attribute.");
} else {
config.setSelector(beanCreatorConfig.getSelector());
}
}
}
public SmooksResourceConfiguration findBeanCreatorConfig(String beanId, ExtensionContext extensionContext) {
List<SmooksResourceConfiguration> creatorConfigs = extensionContext.lookupResource(new ConfigSearch().resource(BeanInstanceCreator.class.getName()).param("beanId", beanId));
if(creatorConfigs.size() > 1) {
throw new SmooksConfigurationException("Multiple <jb:bean> configurations exist for beanId '" + beanId + "'. " +
"In this case you must set the selector in the '" + selectorAttrName + "' attribute because Smooks can't select a sensible default.");
}
if(creatorConfigs.size() == 1) {
return creatorConfigs.get(0);
}
return null;
}
}