    001    // Copyright 2007 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;
    016
    017    import org.apache.tapestry5.ioc.internal.util.CollectionFactory;
    018    import org.apache.tapestry5.ioc.internal.util.InternalUtils;
    019    import org.apache.tapestry5.ioc.services.SymbolProvider;
    020
    021    import javax.servlet.ServletContext;
    022    import java.util.Map;
    023
    024    /**
    025     * A wrapper around {@link ServletContext} that makes init-parameters accessible as symbols.
    026     */
    027    public class ServletContextSymbolProvider implements SymbolProvider
    028    {
    029        private final Map<String, String> properties = CollectionFactory.newCaseInsensitiveMap();
    030
    031        public ServletContextSymbolProvider(ServletContext context)
    032        {
    033            for (String name : InternalUtils.toList(context.getInitParameterNames()))
    034            {
    035                properties.put(name, context.getInitParameter(name));
    036            }
    037        }
    038
    039        public String valueForSymbol(String symbolName)
    040        {
    041            return properties.get(symbolName);
    042        }
    043
    044    }