Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
DisplayStep |
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| 1.75;1.75 |
1 | /* | |
2 | * Copyright 1999-2001,2004 The Apache Software Foundation. | |
3 | * | |
4 | * Licensed under the Apache License, Version 2.0 (the "License"); | |
5 | * you may not use this file except in compliance with the License. | |
6 | * You may obtain a copy of the License at | |
7 | * | |
8 | * http://www.apache.org/licenses/LICENSE-2.0 | |
9 | * | |
10 | * Unless required by applicable law or agreed to in writing, software | |
11 | * distributed under the License is distributed on an "AS IS" BASIS, | |
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
13 | * See the License for the specific language governing permissions and | |
14 | * limitations under the License. | |
15 | */ | |
16 | ||
17 | package org.apache.commons.workflow.io; | |
18 | ||
19 | ||
20 | import org.apache.commons.workflow.Context; | |
21 | import org.apache.commons.workflow.Descriptor; | |
22 | import org.apache.commons.workflow.StepException; | |
23 | import org.apache.commons.workflow.base.DescriptorStep; | |
24 | ||
25 | ||
26 | /** | |
27 | * <p>For each associated <code>Descriptor</code>, print the value of the | |
28 | * specified Java object to standard output.</p> | |
29 | * | |
30 | * <p><strong>WARNING</strong> - This will probably be | |
31 | * replaced later by a more general purpose input/output mechanism.</p> | |
32 | * | |
33 | * @version $Revision: 155475 $ $Date: 2005-02-26 13:31:11 +0000 (Sat, 26 Feb 2005) $ | |
34 | * @author Craig R. McClanahan | |
35 | */ | |
36 | ||
37 | public class DisplayStep extends DescriptorStep { | |
38 | ||
39 | ||
40 | // ----------------------------------------------------------= Constructors | |
41 | ||
42 | ||
43 | /** | |
44 | * Construct a default instance of this Step. | |
45 | */ | |
46 | public DisplayStep() { | |
47 | ||
48 | 0 | super(); |
49 | ||
50 | 0 | } |
51 | ||
52 | ||
53 | /** | |
54 | * Construct an instance of this Step with the specified identifier. | |
55 | * | |
56 | * @param id Step identifier | |
57 | */ | |
58 | public DisplayStep(String id) { | |
59 | ||
60 | 0 | super(); |
61 | 0 | setId(id); |
62 | ||
63 | 0 | } |
64 | ||
65 | ||
66 | /** | |
67 | * Construct an instance of this Step with the specified identifier | |
68 | * and associated Descriptor. | |
69 | * | |
70 | * @param id Step identifier | |
71 | * @param descriptor Initial descriptor | |
72 | */ | |
73 | public DisplayStep(String id, Descriptor descriptor) { | |
74 | ||
75 | 0 | super(); |
76 | 0 | setId(id); |
77 | 0 | addDescriptor(descriptor); |
78 | ||
79 | 0 | } |
80 | ||
81 | ||
82 | // --------------------------------------------------------- Public Methods | |
83 | ||
84 | ||
85 | /** | |
86 | * Perform the executable actions related to this Step, in the context of | |
87 | * the specified Context. | |
88 | * | |
89 | * @param context The Context that is tracking our execution state | |
90 | * | |
91 | * @exception StepException if a processing error has occurred | |
92 | */ | |
93 | public void execute(Context context) throws StepException { | |
94 | ||
95 | // Process all associated descriptors | |
96 | 0 | Descriptor descriptors[] = findDescriptors(); |
97 | 0 | for (int i = 0; i < descriptors.length; i++) { |
98 | 0 | Object value = descriptors[i].get(context); |
99 | 0 | if (value == null) |
100 | 0 | throw new StepException |
101 | ("Cannot retrieve object for " + descriptors[i], this); | |
102 | 0 | System.out.println(value); |
103 | } | |
104 | ||
105 | 0 | } |
106 | ||
107 | ||
108 | } |