01: /*
02: * (c) Copyright 2006 by Volker Bergmann. All rights reserved.
03: *
04: * Redistribution and use in source and binary forms, with or without
05: * modification, is permitted under the terms of the
06: * GNU General Public License.
07: *
08: * For redistributing this software or a derivative work under a license other
09: * than the GPL-compatible Free Software License as defined by the Free
10: * Software Foundation or approved by OSI, you must first obtain a commercial
11: * license to this software product from Volker Bergmann.
12: *
13: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
14: * WITHOUT A WARRANTY OF ANY KIND. ALL EXPRESS OR IMPLIED CONDITIONS,
15: * REPRESENTATIONS AND WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF
16: * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE
17: * HEREBY EXCLUDED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
18: * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
19: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
20: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
21: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
22: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
23: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
24: * POSSIBILITY OF SUCH DAMAGE.
25: */
26:
27: package org.databene.benerator.wrapper;
28:
29: import org.databene.benerator.Generator;
30: import org.databene.benerator.IllegalGeneratorStateException;
31: import org.databene.benerator.GeneratorWrapper;
32: import org.databene.benerator.InvalidGeneratorSetupException;
33: import org.databene.commons.ConversionException;
34: import org.databene.commons.Converter;
35:
36: /**
37: * Reads products from a source Generator and applies a Converter to transform them into the target products.<br/>
38: * <br/>
39: * Created: 12.06.2006 19:02:30
40: */
41: public class ConvertingGenerator<S, T> extends GeneratorWrapper<S, T> {
42:
43: /** The converter to apply to the source's products */
44: protected Converter<S, T> converter;
45:
46: public ConvertingGenerator() {
47: this (null, null);
48: }
49:
50: /** Initializes all attributes */
51: public ConvertingGenerator(Generator<S> source,
52: Converter<S, T> converter) {
53: super (source);
54: this .converter = converter;
55: }
56:
57: // config properties -----------------------------------------------------------------------------------------------
58:
59: public Converter<S, T> getConverter() {
60: return converter;
61: }
62:
63: public void setConverter(Converter<S, T> converter) {
64: this .converter = converter;
65: }
66:
67: // Generator interface ---------------------------------------------------------------------------------------------
68:
69: public void validate() {
70: if (source == null)
71: throw new InvalidGeneratorSetupException("source",
72: "is null");
73: if (converter == null)
74: throw new InvalidGeneratorSetupException("converter",
75: "is null");
76: super .validate();
77: }
78:
79: public Class<T> getGeneratedType() {
80: return converter.getTargetType();
81: }
82:
83: /** @see org.databene.benerator.Generator#generate() */
84: public T generate() {
85: try {
86: S product = source.generate();
87: return converter.convert(product);
88: } catch (ConversionException e) {
89: throw new IllegalGeneratorStateException(e);
90: }
91: }
92: }
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