    001    // Copyright 2009 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.ioc.internal.services;
    016
    017    import org.apache.tapestry5.ioc.Resource;
    018    import org.apache.tapestry5.ioc.internal.util.CollectionFactory;
    019    import org.apache.tapestry5.ioc.internal.util.InternalUtils;
    020    import org.apache.tapestry5.ioc.services.SymbolProvider;
    021
    022    import java.io.IOException;
    023    import java.io.InputStream;
    024    import java.util.Map;
    025    import java.util.Properties;
    026
    027    /**
    028     * Makes a {@link org.apache.tapestry5.ioc.Resource} available as a {@link org.apache.tapestry5.ioc.services.SymbolProvider}
    029     *
    030     * @since 5.1.0.5
    031     */
    032    public class ResourceSymbolProvider implements SymbolProvider
    033    {
    034        private final Resource resource;
    035
    036        private final Map<String, String> properties = CollectionFactory.newCaseInsensitiveMap();
    037
    038        public ResourceSymbolProvider(final Resource resource)
    039        {
    040            this.resource = resource;
    041
    042            readProperties();
    043        }
    044
    045        private void readProperties()
    046        {
    047            Properties p = new Properties();
    048
    049            InputStream is = null;
    050
    051            try
    052            {
    053                is = resource.openStream();
    054
    055                p.load(is);
    056
    057                is.close();
    058
    059                is = null;
    060
    061                for (Map.Entry<Object, Object> entry : p.entrySet())
    062                {
    063                    String key = entry.getKey().toString();
    064
    065                    properties.put(key, p.getProperty(key));
    066                }
    067            }
    068            catch (IOException ex)
    069            {
    070                throw new RuntimeException(ex);
    071            }
    072            finally
    073            {
    074                InternalUtils.close(is);
    075            }
    076        }
    077
    078        public String valueForSymbol(String symbolName)
    079        {
    080            return properties.get(symbolName);
    081        }
    082    }