Package org.apache.cayenne.project.upgrade.v6

Source Code of org.apache.cayenne.project.upgrade.v6.XMLDataMapLoader_V3_0_0_1

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*   Licensed to the Apache Software Foundation (ASF) under one
*  or more contributor license agreements.  See the NOTICE file
*  distributed with this work for additional information
*  regarding copyright ownership.  The ASF 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.
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package org.apache.cayenne.project.upgrade.v6;

import java.io.IOException;
import java.io.InputStream;
import java.net.URL;

import org.apache.cayenne.CayenneRuntimeException;
import org.apache.cayenne.configuration.XMLDataMapLoader;
import org.apache.cayenne.map.DataMap;
import org.apache.cayenne.map.MapLoader;
import org.apache.cayenne.resource.Resource;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.xml.sax.InputSource;

/**
* @since 3.1
*/
class XMLDataMapLoader_V3_0_0_1 {

    private static Log logger = LogFactory.getLog(XMLDataMapLoader.class);

    public DataMap load(Resource configurationResource) throws CayenneRuntimeException {

        MapLoader mapLoader = new MapLoader();
        URL url = configurationResource.getURL();

        InputStream in = null;

        DataMap map;

        try {
            in = url.openStream();

            map = mapLoader.loadDataMap(new InputSource(in));
        }
        catch (Exception e) {
            throw new CayenneRuntimeException(
                    "Error loading configuration from %s",
                    e,
                    url);
        }
        finally {
            try {
                if (in != null) {
                    in.close();
                }
            }
            catch (IOException ioex) {
                logger.info(
                        "failure closing input stream for " + url + ", ignoring",
                        ioex);
            }
        }

        return map;
    }
}
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