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.engine.expression;
28
29 import com.rapiddweller.benerator.Generator;
30 import com.rapiddweller.benerator.util.WrapperProvider;
31 import com.rapiddweller.benerator.wrapper.ProductWrapper;
32 import com.rapiddweller.common.Context;
33 import com.rapiddweller.script.Expression;
34 import com.rapiddweller.script.expression.DynamicExpression;
35
36 /**
37 * {@link Expression} implementation that evaluates to a {@link Generator}.<br/>
38 * <br/>
39 * Created at 23.07.2009 15:17:04
40 *
41 * @param <E> the type parameter
42 * @author Volker Bergmann
43 * @since 0.6.0
44 */
45 public class GeneratorExpression<E> extends DynamicExpression<E> {
46
47 private final Generator<E> generator;
48 private final WrapperProvider<E> wrapperProvider = new WrapperProvider<>();
49
50 /**
51 * Instantiates a new Generator expression.
52 *
53 * @param generator the generator
54 */
55 public GeneratorExpression(Generator<E> generator) {
56 this.generator = generator;
57 }
58
59 @Override
60 public E evaluate(Context context) {
61 ProductWrapper<E> result = generator.generate(wrapperProvider.get());
62 return (result != null ? result.unwrap() : null);
63 }
64
65 }