01: // Copyright 2004, 2005 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.hivemind;
16:
17: /**
18: * Used to define an object that can provide a value for a substitution symbol
19: * (substitution symbol can appear in HiveMind module deployment descriptors).
20: *
21: * @author Howard Lewis Ship
22: */
23:
24: public interface SymbolSource {
25: /**
26: * Returns the value for the symbol, if this source can provide one.
27: * Returns null if the source can not provide a value.
28: */
29: public String valueForSymbol(String name);
30: }
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