    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.services.SymbolProvider;
    018
    019/**
    020 * Implementation of {@link SymbolProvider} that only supports a single key/value pair.
    021 */
    022public class SingleKeySymbolProvider implements SymbolProvider
    023{
    024    private final String symbolName;
    025
    026    private final String value;
    027
    028    public SingleKeySymbolProvider(final String symbolName, final String value)
    029    {
    030        this.symbolName = symbolName;
    031        this.value = value;
    032    }
    033
    034    public String valueForSymbol(String symbolName)
    035    {
    036        if (this.symbolName.equalsIgnoreCase(symbolName)) return value;
    037
    038        return null;
    039    }
    040
    041}