org.opencastproject.security.api.UserParser.java Source code

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Here is the source code for org.opencastproject.security.api.UserParser.java

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/**
 * Licensed to The Apereo Foundation under one or more contributor license
 * agreements. See the NOTICE file distributed with this work for additional
 * information regarding copyright ownership.
 *
 *
 * The Apereo Foundation licenses this file to you under the Educational
 * Community 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://opensource.org/licenses/ecl2.txt
 *
 * 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.opencastproject.security.api;

import org.apache.commons.io.IOUtils;

import java.io.InputStream;
import java.io.StringWriter;
import java.io.Writer;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;
import javax.xml.transform.stream.StreamSource;

/**
 * Marshals and unmarshalls {@link User}s to/from XML.
 */
public final class UserParser {

    private static final JAXBContext jaxbContext;

    static {
        try {
            jaxbContext = JAXBContext.newInstance("org.opencastproject.security.api",
                    UserParser.class.getClassLoader());
        } catch (JAXBException e) {
            throw new IllegalStateException(e);
        }
    }

    /**
     * Disallow construction of this utility class.
     */
    private UserParser() {
    }

    public static User fromXml(String xml) {
        InputStream in = null;
        try {
            in = IOUtils.toInputStream(xml);
            Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();
            return unmarshaller.unmarshal(new StreamSource(in), JaxbUser.class).getValue();
        } catch (JAXBException e) {
            throw new IllegalStateException(e.getLinkedException() != null ? e.getLinkedException() : e);
        } finally {
            IOUtils.closeQuietly(in);
        }
    }

    public static String toXml(User user) {
        try {
            Marshaller marshaller = jaxbContext.createMarshaller();
            Writer writer = new StringWriter();
            marshaller.marshal(user, writer);
            return writer.toString();
        } catch (JAXBException e) {
            throw new IllegalStateException(e.getLinkedException() != null ? e.getLinkedException() : e);
        }
    }

}