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.task;
28
29 import com.rapiddweller.common.Context;
30 import com.rapiddweller.common.ErrorHandler;
31 import com.rapiddweller.common.MessageHolder;
32
33 /**
34 * Wraps a Task and forwards invocations.<br/>
35 * <br/>
36 * Created: 06.07.2007 06:36:22
37 *
38 * @param <E> the type parameter
39 * @author Volker Bergmann
40 * @since 0.2
41 */
42 public abstract class TaskProxy<E extends Task> extends AbstractTask
43 implements Cloneable, MessageHolder {
44
45 /**
46 * The Real task.
47 */
48 protected E realTask;
49
50 /**
51 * Instantiates a new Task proxy.
52 *
53 * @param realTask the real task
54 */
55 public TaskProxy(E realTask) {
56 setRealTask(realTask);
57 }
58
59 /**
60 * Gets real task.
61 *
62 * @return the real task
63 */
64 public E getRealTask() {
65 return realTask;
66 }
67
68 /**
69 * Sets real task.
70 *
71 * @param realTask the real task
72 */
73 public void setRealTask(E realTask) {
74 this.realTask = realTask;
75 setTaskName(realTask != null ? realTask.getClass().getSimpleName() :
76 "undefined");
77 }
78
79 @Override
80 public TaskResult execute(Context context, ErrorHandler errorHandler) {
81 return realTask.execute(context, errorHandler);
82 }
83
84 @Override
85 public void pageFinished() {
86 realTask.pageFinished();
87 }
88
89 @Override
90 public boolean isThreadSafe() {
91 return realTask.isThreadSafe();
92 }
93
94 @Override
95 public boolean isParallelizable() {
96 return realTask.isParallelizable();
97 }
98
99 @Override
100 public String getMessage() {
101 return (realTask instanceof MessageHolder ?
102 ((MessageHolder) realTask).getMessage() : null);
103 }
104
105 @Override
106 public void close() {
107 realTask.close();
108 }
109
110 @Override
111 public abstract Object clone();
112
113 @Override
114 public String toString() {
115 return getClass().getSimpleName() + '[' + realTask.toString() + ']';
116 }
117
118 }