    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
    015package org.apache.tapestry5.internal;
    016
    017import org.apache.tapestry5.ioc.internal.util.CollectionFactory;
    018import org.apache.tapestry5.ioc.internal.util.InternalUtils;
    019import org.apache.tapestry5.ioc.services.SymbolProvider;
    020
    021import javax.servlet.ServletContext;
    022import java.util.Map;
    023
    024/**
    025 * A wrapper around {@link ServletContext} that makes init-parameters accessible as symbols.
    026 */
    027public 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}