1 /*
2 * (c) Copyright 2006-2020 by rapiddweller GmbH & Volker Bergmann. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, is permitted under the terms of the
6 * GNU General Public License.
7 *
8 * For redistributing this software or a derivative work under a license other
9 * 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 rapiddweller GmbH & 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 com.rapiddweller.benerator.composite;
28
29 import com.rapiddweller.benerator.engine.BeneratorContext;
30 import com.rapiddweller.common.Assert;
31 import com.rapiddweller.script.Expression;
32
33 /**
34 * {@link ComponentBuilder} which executes only if a condition expression evaluates to 'true'.<br/><br/>
35 * Created: 11.10.2010 11:15:14
36 *
37 * @param <E> the type parameter
38 * @author Volker Bergmann
39 * @since 0.6.4
40 */
41 public class ConditionalComponentBuilder<E> extends ComponentBuilderProxy<E> {
42
43 private final Expression<?> condition;
44
45 /**
46 * Instantiates a new Conditional component builder.
47 *
48 * @param source the source
49 * @param condition the condition
50 */
51 public ConditionalComponentBuilder(ComponentBuilder<E> source, Expression<?> condition) {
52 super(source);
53 Assert.notNull(condition, "condition");
54 this.condition = condition;
55 }
56
57 @Override
58 public boolean execute(BeneratorContext context) {
59 Object conditionResult = condition.evaluate(context);
60 if (conditionResult == null) {
61 throw new IllegalArgumentException("Condition resolves to null: " + condition);
62 }
63 if (!(conditionResult instanceof Boolean)) {
64 throw new IllegalArgumentException("Condition does not resolve to a boolean value: " + condition);
65 }
66 if ((Boolean) conditionResult) {
67 return source.execute(context);
68 } else {
69 return true;
70 }
71 }
72
73 }