01: // Copyright 2006 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.ioc.services;
16:
17: /**
18: * Responsible for converting from one type to another. This is used primarily around component
19: * parameters.
20: *
21: *
22: * @param <S>
23: * the source type (input)
24: * @param <T>
25: * the target type (output)
26: */
27: public interface Coercion<S, T> {
28: /**
29: * Converts an input value.
30: *
31: * @param input
32: * the input value
33: */
34: T coerce(S input);
35: }
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