/*
* Copyright 2013 JBoss Inc
*
* 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 org.kie.aries.blueprint.namespace;
import org.apache.aries.blueprint.ParserContext;
import org.apache.aries.blueprint.mutable.MutableBeanMetadata;
import org.apache.aries.blueprint.mutable.MutableCollectionMetadata;
import org.apache.aries.blueprint.mutable.MutablePassThroughMetadata;
import org.drools.core.util.StringUtils;
import org.kie.aries.blueprint.factorybeans.KSessionOptions;
import org.osgi.service.blueprint.container.ComponentDefinitionException;
import org.osgi.service.blueprint.reflect.ComponentMetadata;
import org.osgi.service.blueprint.reflect.Metadata;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
public class KieSessionElementParser extends AbstractElementParser {
public static final String ATTRIBUTE_TYPE = "type";
public static final String ATTRIBUTE_KBASE_REF = "kbase-ref";
public static final String ATTRIBUTE_LISTENERS_REF = "listeners-ref";
public static final String ATTRIBUTE_RELEASEID = "releaseId";
public static final String ELEMENT_NAME_KSESSION_REF = "ksession-ref";
public static final String ELEMENT_NAME_KSESSION = "ksession";
private static final String ATTRIBUTE_DEFAULT = "default";
private static final String ATTRIBUTE_CLOCK_TYPE = "clock-type";
private static final String ATTRIBUTE_SCOPE = "scope";
@Override
public ComponentMetadata parseElement(ParserContext context, Element element) {
String id = getId(context, element);
String type = element.getAttribute(ATTRIBUTE_TYPE);
String listenersRef = element.getAttribute(ATTRIBUTE_LISTENERS_REF);
String kbaseRef = element.getAttribute(ATTRIBUTE_KBASE_REF);
String releaseId = element.getAttribute(ATTRIBUTE_RELEASEID);
String localName = element.getLocalName();
if (StringUtils.isEmpty(id)) {
throw new ComponentDefinitionException("Mandatory attribute 'id' missing for "+localName+". Cannot continue.");
}
if ( ELEMENT_NAME_KSESSION.equalsIgnoreCase(localName)) {
if (StringUtils.isEmpty(type)) {
type = "stateful";
}
}
MutableBeanMetadata beanMetadata = context.createMetadata(MutableBeanMetadata.class);
beanMetadata.setActivation(ComponentMetadata.ACTIVATION_LAZY);
beanMetadata.setId(id);
beanMetadata.setClassName("org.kie.aries.blueprint.factorybeans.KieObjectsFactoryBean");
beanMetadata.addArgument(createValue(context, id), null, 0);
if (StringUtils.isEmpty(releaseId)) {
beanMetadata.addArgument(createNullMetadata(), null, 1);
} else {
beanMetadata.addArgument(createRef(context, releaseId), null, 1);
}
if (!StringUtils.isEmpty(listenersRef)) {
beanMetadata.addArgument(createRef(context, listenersRef), null, 2);
} else {
Metadata metadata = checkForChildListeners(context, element);
beanMetadata.addArgument(metadata, null, 2);
}
MutableCollectionMetadata collectionMetadata = KieSessionLoggerElementParser.parseConsoleLoggers(this, context, element);
beanMetadata.addArgument(collectionMetadata, null, 3);
collectionMetadata = KieSessionBatchElementParser.parseBatchElement(this, context, element);
beanMetadata.addArgument(collectionMetadata, null, 4);
beanMetadata.setActivation(ComponentMetadata.ACTIVATION_LAZY);
KSessionOptions kSessionOptions = new KSessionOptions();
if ( ELEMENT_NAME_KSESSION.equalsIgnoreCase(localName)) {
kSessionOptions.setkBaseRef(kbaseRef);
kSessionOptions.setType(type);
beanMetadata.setFactoryMethod("createKieSession");
} else {
beanMetadata.setFactoryMethod("createKieSessionRef");
}
kSessionOptions.setDef(element.getAttribute(ATTRIBUTE_DEFAULT));
kSessionOptions.setClockType(element.getAttribute(ATTRIBUTE_SCOPE));
kSessionOptions.setScope(element.getAttribute(ATTRIBUTE_CLOCK_TYPE));
beanMetadata.setActivation(ComponentMetadata.ACTIVATION_LAZY);
MutablePassThroughMetadata passThroughMetadata = context.createMetadata(MutablePassThroughMetadata.class);
passThroughMetadata.setObject(kSessionOptions);
beanMetadata.addArgument(passThroughMetadata, null, 5);
return beanMetadata;
}
protected Metadata checkForChildListeners(ParserContext context, Element element){
NodeList nodeList = element.getChildNodes();
for (int i=0; i < nodeList.getLength(); i++){
Node node = nodeList.item(i);
String localName = node.getLocalName();
if ( localName == null) {
continue;
}
if ("ruleRuntimeEventListener".equalsIgnoreCase(localName) || "processEventListener".equalsIgnoreCase(localName) || "agendaEventListener".equalsIgnoreCase(localName)){
// run the loop only if we have atleast one child
// the KieEventListenersElementParser.getBeanMetadata method will loop and pick up all the listeners
MutableBeanMetadata beanMetadata = KieEventListenersElementParser.getBeanMetadata(context, element);
return beanMetadata;
}
}
return createNullMetadata();
}
}