01: // Copyright 2007 The Apache Software Foundation
02: //
03: // Licensed under the Apache License, Version 2.0 (the "License");
04: // you may not use this file except in compliance with the License.
05: // You may obtain a copy of the License at
06: //
07: // http://www.apache.org/licenses/LICENSE-2.0
08: //
09: // Unless required by applicable law or agreed to in writing, software
10: // distributed under the License is distributed on an "AS IS" BASIS,
11: // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12: // See the License for the specific language governing permissions and
13: // limitations under the License.
14:
15: package org.apache.tapestry.internal;
16:
17: import org.apache.tapestry.ioc.services.SymbolProvider;
18:
19: /**
20: * Implementation of {@link SymbolProvider} that only supports a single key/value pair.
21: */
22: public class SingleKeySymbolProvider implements SymbolProvider {
23: private final String _symbolName;
24:
25: private final String _value;
26:
27: public SingleKeySymbolProvider(final String symbolName,
28: final String value) {
29: _symbolName = symbolName;
30: _value = value;
31: }
32:
33: public String valueForSymbol(String symbolName) {
34: if (_symbolName.equalsIgnoreCase(symbolName))
35: return _value;
36:
37: return null;
38: }
39:
40: }
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