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.statement;
28
29 import com.rapiddweller.benerator.engine.Statement;
30 import com.rapiddweller.benerator.engine.expression.CachedExpression;
31 import com.rapiddweller.common.Context;
32 import com.rapiddweller.common.ErrorHandler;
33 import com.rapiddweller.common.Level;
34 import com.rapiddweller.script.Expression;
35
36 /**
37 * Abstract implementation of the Statement interface.<br/><br/>
38 * Created: 27.10.2009 20:16:20
39 *
40 * @author Volker Bergmann
41 * @since 0.5.0
42 */
43 public abstract class AbstractStatement implements Statement {
44
45 private final Expression<ErrorHandler> errorHandler;
46
47 // constructors ----------------------------------------------------------------------------------------------------
48
49 /**
50 * Instantiates a new Abstract statement.
51 */
52 protected AbstractStatement() {
53 this(null);
54 }
55
56 /**
57 * Instantiates a new Abstract statement.
58 *
59 * @param errorHandler the error handler
60 */
61 protected AbstractStatement(Expression<ErrorHandler> errorHandler) {
62 this.errorHandler = errorHandler;
63 }
64
65 // Task interface --------------------------------------------------------------------------------------------------
66
67 /**
68 * Gets error handler.
69 *
70 * @param context the context
71 * @return the error handler
72 */
73 public ErrorHandler getErrorHandler(Context context) {
74 if (errorHandler == null) {
75 return new ErrorHandler(getClass().getName(), Level.fatal);
76 }
77 return errorHandler.evaluate(context);
78 }
79
80 // helpers ---------------------------------------------------------------------------------------------------------
81
82 /**
83 * Handle error.
84 *
85 * @param message the message
86 * @param context the context
87 */
88 protected void handleError(String message, Context context) {
89 getErrorHandler(context).handleError(message);
90 }
91
92 /**
93 * Handle error.
94 *
95 * @param message the message
96 * @param context the context
97 * @param t the t
98 */
99 protected void handleError(String message, Context context, Throwable t) {
100 getErrorHandler(context).handleError(message, t);
101 }
102
103 /**
104 * Cache expression.
105 *
106 * @param <T> the type parameter
107 * @param expression the expression
108 * @return the expression
109 */
110 protected static <T> Expression<T> cache(Expression<T> expression) {
111 return (expression != null ? new CachedExpression<>(expression) : null);
112 }
113
114 @Override
115 public String toString() {
116 return getClass().getSimpleName();
117 }
118
119 }