com.ibm.jbatch.jsl.util.ValidatorHelper Maven / Gradle / Ivy
/*
* 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.jsl.util;
import java.net.URL;
import java.util.logging.Logger;
import javax.xml.XMLConstants;
import javax.xml.validation.Schema;
import javax.xml.validation.SchemaFactory;
import org.xml.sax.SAXException;
public class ValidatorHelper {
public final static String SCHEMA_LOCATION = "/xsd/jobXML_2_0.xsd";
public final static String API_BUNDLE_SYMBOLIC_NAME = "jakarta.batch-api";
private final static Class thisClass = ValidatorHelper.class;
private final static Logger logger = Logger.getLogger(thisClass.getName());
private static Schema schema = null;
private static SchemaFactory sf =
SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
/**
* This method must be synchronized as SchemaFactory is not thread-safe
*/
public static synchronized Schema getXJCLSchema() {
if (schema == null) {
try {
URL url = thisClass.getResource(SCHEMA_LOCATION);
logger.fine("After search via flat classpath for Job XML XSD file: " + SCHEMA_LOCATION + " url = " + url);
/*
if (url == null) {
// Try OSGI API
logger.fine("Job XML XSD file: " + SCHEMA_LOCATION + " not found via classpath, trying OSGI");
Bundle apiBundle = null;
for (Bundle b : FrameworkUtil.getBundle(thisClass).getBundleContext().getBundles()) {
if (b.getHeaders().get(BUNDLE_SYMBOLICNAME).equals(API_BUNDLE_SYMBOLIC_NAME)) {
if (b.getHeaders().get(BUNDLE_VERSION).startsWith("2.")) {
apiBundle = b;
logger.fine("Job XML XSD file: " + SCHEMA_LOCATION + " found in OSGi Bundle: " + apiBundle);
break;
} else {
// Right symbolic name, wrong version
logger.fine("Bundle: " + b + " found, but version doesn't match expected");
}
}
}
// Looped through all and didn't find any
if (apiBundle == null) {
String msg = "Jakarta Batch API bundle not found via OSGI bundle network.";
logger.severe(msg);
throw new IllegalStateException(msg);
}
url = apiBundle.getResource(SCHEMA_LOCATION);
if (url == null) {
String msg = "Job XML XSD file: " + SCHEMA_LOCATION + " not found in API bundle: "+ apiBundle;
logger.severe(msg);
throw new IllegalStateException(msg);
}
logger.fine("Search via OSGI bundle network for Job XML XSD file: " + SCHEMA_LOCATION + ", found url = " + url);
}
*/
schema = sf.newSchema(url);
} catch (SAXException e) {
throw new RuntimeException(e);
}
}
return schema;
}
}