    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
    015package org.apache.tapestry5.internal.jpa;
    016
    017import org.apache.tapestry5.ioc.internal.util.InternalUtils;
    018import org.apache.tapestry5.jpa.TapestryPersistenceUnitInfo;
    019import org.xml.sax.InputSource;
    020import org.xml.sax.XMLReader;
    021import org.xml.sax.helpers.XMLReaderFactory;
    022
    023import java.io.InputStream;
    024import java.util.List;
    025
    026public 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}