    001    // Copyright 2011 The Apache Software Foundation
    002    //
    003    // Licensed under the Apache License, Version 2.0 (the "License");
    004    // you may not use this file except in compliance with the License.
    005    // You may obtain a copy of the License at
    006    //
    007    // http://www.apache.org/licenses/LICENSE-2.0
    008    //
    009    // Unless required by applicable law or agreed to in writing, software
    010    // distributed under the License is distributed on an "AS IS" BASIS,
    011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    012    // See the License for the specific language governing permissions and
    013    // limitations under the License.
    014
    015    package org.apache.tapestry5.internal.jpa;
    016
    017    import org.apache.tapestry5.ioc.internal.util.InternalUtils;
    018    import org.apache.tapestry5.jpa.TapestryPersistenceUnitInfo;
    019    import org.xml.sax.InputSource;
    020    import org.xml.sax.XMLReader;
    021    import org.xml.sax.helpers.XMLReaderFactory;
    022
    023    import java.io.InputStream;
    024    import java.util.List;
    025
    026    public class PersistenceParser
    027    {
    028
    029        public List<TapestryPersistenceUnitInfo> parse(final InputStream stream)
    030        {
    031
    032            final PersistenceContentHandler handler = new PersistenceContentHandler();
    033
    034            try
    035            {
    036                final XMLReader reader = XMLReaderFactory.createXMLReader();
    037
    038                reader.setContentHandler(handler);
    039
    040                reader.parse(new InputSource(stream));
    041
    042                return handler.getPersistenceUnits();
    043
    044            }
    045            catch (final Exception e)
    046            {
    047                throw new RuntimeException(e);
    048            }
    049            finally
    050            {
    051                InternalUtils.close(stream);
    052            }
    053        }
    054
    055    }