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    }