org.jasig.maven.notice.LicenseLookupContext Maven / Gradle / Ivy

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/**
 * Licensed to Jasig under one or more contributor license
 * agreements. See the NOTICE file distributed with this work
 * for additional information regarding copyright ownership.
 * Jasig licenses this file to you 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.jasig.maven.notice;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;

import org.jasig.maven.notice.lookup.LicenseLookup;

/**
 * Utility for loading the LicenseLookup JAXBContext as a singleton
 * 
 * @author Eric Dalquist
 * @version $Revision: 22232 $
 */
public final class LicenseLookupContext {
    private static final Package LICENSE_LOOKUP_PACKAGE = LicenseLookup.class.getPackage();
    private static JAXBContext JAXB_CONTEXT;
    
    private static synchronized JAXBContext getJaxbContext() {
        if (JAXB_CONTEXT == null) {
            try {
                JAXB_CONTEXT = JAXBContext.newInstance(LICENSE_LOOKUP_PACKAGE.getName());
            }
            catch (JAXBException e) {
                throw new IllegalStateException("Failed to load JAXBContext for package: " + LICENSE_LOOKUP_PACKAGE, e);
            }
        }
        
        return JAXB_CONTEXT;
    }

    public static Unmarshaller getUnmarshaller() {
        try {
            final JAXBContext jaxbContext = getJaxbContext();
            return jaxbContext.createUnmarshaller();
        }
        catch (JAXBException e) {
            throw new IllegalStateException("Failed to load JAXBContext for package: " + LICENSE_LOOKUP_PACKAGE, e);
        }
    }

    public static Marshaller getMarshaller() {
        try {
            final JAXBContext jaxbContext = getJaxbContext();
            final Marshaller marshaller = jaxbContext.createMarshaller();
            marshaller.setProperty("jaxb.schemaLocation", "https://source.jasig.org/schemas/maven-notice-plugin/license-lookup https://source.jasig.org/schemas/maven-notice-plugin/license-lookup/license-lookup-v1.0.xsd");
            marshaller.setProperty("jaxb.formatted.output", true);
            return marshaller;
        }
        catch (JAXBException e) {
            throw new IllegalStateException("Failed to load JAXBContext for package: " + LICENSE_LOOKUP_PACKAGE, e);
        }
    }
    
    private LicenseLookupContext() {
    }
}