    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
    015package org.apache.tapestry5.ioc.internal.services;
    016
    017import org.apache.tapestry5.ioc.Resource;
    018import org.apache.tapestry5.ioc.internal.util.CollectionFactory;
    019import org.apache.tapestry5.ioc.internal.util.InternalUtils;
    020import org.apache.tapestry5.ioc.services.SymbolProvider;
    021
    022import java.io.IOException;
    023import java.io.InputStream;
    024import java.util.Map;
    025import 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 */
    032public 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    @Override
    079    public String valueForSymbol(String symbolName)
    080    {
    081        return properties.get(symbolName);
    082    }
    083}