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/*
* Copyright 2012 International Business Machines Corp.
*
* See the NOTICE file distributed with this work for additional information
* regarding copyright ownership. 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 com.ibm.jbatch.container.jsl.impl;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.StringReader;
import java.net.URL;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.HashMap;
import java.util.Properties;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBElement;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Unmarshaller;
import javax.xml.transform.stream.StreamSource;
import com.ibm.jbatch.container.jsl.ModelResolver;
import com.ibm.jbatch.jsl.model.JSLJob;
import com.ibm.jbatch.jsl.model.Step;
import com.ibm.jbatch.jsl.util.ValidatorHelper;
import com.ibm.jbatch.jsl.util.JSLValidationEventHandler;
public class JobModelResolverImpl implements ModelResolver {
public JobModelResolverImpl() {
super();
}
private JSLJob unmarshalJobXML(String jobXML) {
Object result = null;
JSLJob job = null;
JSLValidationEventHandler handler = new JSLValidationEventHandler();
try {
JAXBContext ctx = JAXBContext.newInstance("com.ibm.jbatch.jsl.model");
Unmarshaller u = ctx.createUnmarshaller();
u.setSchema(ValidatorHelper.getXJCLSchema());
u.setEventHandler(handler);
// Use this for anonymous type
//job = (Job)u.unmarshal(new StreamSource(new StringReader(jobXML)));
// Use this for named complex type
result = u.unmarshal(new StreamSource(new StringReader(jobXML)));
} catch (JAXBException e) {
throw new IllegalArgumentException("Exception unmarshalling jobXML", e);
}
if (handler.eventOccurred()) {
throw new IllegalArgumentException("xJCL invalid per schema, see SysOut for now for details");
}
job = ((JAXBElement)result).getValue();
return job;
}
private JSLJob getJslJobInheritance(String jobId) throws IOException {
JSLJob jslJob = null;
InputStream indexFileUrl = JobModelResolverImpl.class.getResourceAsStream("/META-INF/jobinheritance");
if (indexFileUrl != null) {
Properties index = new Properties();
index.load(indexFileUrl);
if (index.getProperty(jobId) != null) {
URL parentUrl = JobModelResolverImpl.class.getResource(index.getProperty(jobId));
String parentXml = readJobXML(parentUrl.getFile());
jslJob = resolveModel(parentXml);
}
}
return jslJob;
}
private String readJobXML(String fileWithPath) throws FileNotFoundException, IOException {
StringBuffer jobXMLBuffer = ( fileWithPath==null ? null : new StringBuffer() );
if ( !(fileWithPath==null) ) {
BufferedReader zin = new BufferedReader( new FileReader( new File(fileWithPath)));
String input = zin.readLine();
do {
if (input != null) {
//jobXMLBuffer.append( input.trim() );
jobXMLBuffer.append(input);
input = zin.readLine();
}
} while (input!=null);
}
return ( jobXMLBuffer==null ? null : jobXMLBuffer.toString() );
}
@Override
public JSLJob resolveModel(String jobXML) {
final String finalJobXML = jobXML;
JSLJob jslJob = AccessController.doPrivileged(
new PrivilegedAction() {
public JSLJob run() {
return unmarshalJobXML(finalJobXML);
}
});
return jslJob;
}
// FIXME These maps need to move to the xJCL Repository
private static HashMap jobid2InstanceMap = new HashMap();
private static HashMap stepid2InstanceMap = new HashMap();
@Override
public JSLJob resolveModel(JSLJob t) {
// TODO Auto-generated method stub
// was this intended for inheritance?
return null;
}
// FIXME HashMap splitid2InstanceMap = new HashMap();
// FIXME HashMap flowid2InstanceMap = new HashMap();
//
// This is where we will implement job/step inheritance, though we don't at
// the moment.
//
/*
public static ResolvedJob resolveJob(Job job) {
ArrayList steps = new ArrayList();
ArrayList decisions = new ArrayList();
ArrayList splits = new ArrayList();
ArrayList flows = new ArrayList();
ResolvedJob resolvedJob = new ResolvedJob(job.getId(), steps, decisions, splits, flows);
for (Object next : job.getControlElements()) {
if (next instanceof Step) {
steps.add(new ResolvedStep(resolvedJob, (Step) next));
} else if (next instanceof Decision) {
decisions.add(new ResolvedDecision(resolvedJob, (Decision) next));
} else if (next instanceof Split) {
splits.add(new ResolvedSplit(resolvedJob, (Split) next));
} else if (next instanceof Flow) {
flows.add(new ResolvedFlow(resolvedJob, (Flow) next));
}
}
return resolvedJob;
}
//FIXME We started implementing job inheritance here. Set to private so no one uses this yet.
private static ResolvedJob resolveModel(Job leafJob) {
String parentID = leafJob.getParent();
Job resolvedJob = resolveModel(leafJob, parentID);
// FIXME you need to create a new ResolvedJob here.
return null;
}
private static Job resolveModel(Job leafJob, String parentID) {
if (!parentID.equals("")) {
Job parentJob = jobid2InstanceMap.get(parentID);
if (parentJob == null) {
throw new BatchContainerRuntimeException(new IllegalArgumentException(), "The parent job id '" + parentID + "' on Job id '"
+ leafJob.getParent() + " cannot be found");
}
// add all the attributes, steps, flows, and splits from the parent
// to child if they don't exist on child
leafJob.getControlElements().addAll(parentJob.getControlElements());
return resolveModel(leafJob, parentJob.getParent());
}
for (Object next : leafJob.getControlElements()) {
if (next instanceof Step) {
resolveModel((Step)next);
} else if (next instanceof Split) {
//resolveModel((Split)next);
} else if (next instanceof Flow) {
//resolveModel((Flow)next);
}
}
return leafJob;
}
//FIXME Set to private so no one uses this yet.
private static ResolvedStep resolveModel(Step leafStep) {
String parentID = leafStep.getParent();
Step resolvedStep = resolveModel(leafStep, parentID);
// FIXME you need to clone the step to a resolved step
return null;
}
private static Step resolveModel(Step leafStep, String parentID) {
if (!parentID.equals("")) {
Step parentStep = stepid2InstanceMap.get(parentID);
if (parentStep == null) {
throw new BatchContainerRuntimeException(new IllegalArgumentException(), "The parent step id '" + parentID
+ "' on Step id '" + leafStep.getParent() + " cannot be found");
}
// add all the attributes, batchlets, chunks...etc from a parent
// step if they don't
// exist on the child step
// leafStep.getXXX().addAll(parentStep.getXXX());
return resolveModel(leafStep, parentStep.getParent());
}
// batchlet
//
// resolve chunks
// next, startlimit ...etc
// FIXME ...
return leafStep;
}
*/
}
