01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * http://www.apache.org/licenses/LICENSE-2.0
10: *
11: * Unless required by applicable law or agreed to in writing, software
12: * distributed under the License is distributed on an "AS IS" BASIS,
13: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14: * See the License for the specific language governing permissions and
15: * limitations under the License.
16: */
17: package org.apache.commons.beanutils.converters;
18:
19: import org.apache.commons.beanutils.Converter;
20:
21: /**
22: * Provides a facade for {@link Converter} implementations
23: * preventing access to any public API in the implementation,
24: * other than that specified by {@link Converter}.
25: * <p />
26: * This implementation can be used to prevent registered {@link Converter}
27: * implementations that provide configuration options from being
28: * retrieved and modified.
29: *
30: * @version $Revision: 552084 $ $Date: 2007-06-30 04:04:13 +0100 (Sat, 30 Jun 2007) $
31: * @since 1.8.0
32: */
33: public final class ConverterFacade implements Converter {
34:
35: private final Converter converter;
36:
37: /**
38: * Construct a converter which delegates to the specified
39: * {@link Converter} implementation.
40: *
41: * @param converter The converter to delegate to
42: */
43: public ConverterFacade(Converter converter) {
44: if (converter == null) {
45: throw new IllegalArgumentException("Converter is missing");
46: }
47: this .converter = converter;
48: }
49:
50: /**
51: * Convert the input object into an output object of the
52: * specified type by delegating to the underlying {@link Converter}
53: * implementation.
54: *
55: * @param type Data type to which this value should be converted
56: * @param value The input value to be converted
57: * @return The converted value.
58: */
59: public Object convert(Class type, Object value) {
60: return converter.convert(type, value);
61: }
62:
63: /**
64: * Provide a String representation of this facade implementation
65: * sand the underlying {@link Converter} it delegates to.
66: *
67: * @return A String representation of this facade implementation
68: * sand the underlying {@link Converter} it delegates to
69: */
70: public String toString() {
71: return "ConverterFacade[" + converter.toString() + "]";
72: }
73:
74: }
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