Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||||||
If |
|
| 2.0;2 |
1 | /* |
|
2 | * Licensed to the Apache Software Foundation (ASF) under one or more |
|
3 | * contributor license agreements. See the NOTICE file distributed with |
|
4 | * this work for additional information regarding copyright ownership. |
|
5 | * The ASF licenses this file to You under the Apache License, Version 2.0 |
|
6 | * (the "License"); you may not use this file except in compliance with |
|
7 | * the License. You may obtain a copy of the License at |
|
8 | * |
|
9 | * http://www.apache.org/licenses/LICENSE-2.0 |
|
10 | * |
|
11 | * Unless required by applicable law or agreed to in writing, software |
|
12 | * distributed under the License is distributed on an "AS IS" BASIS, |
|
13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
|
14 | * See the License for the specific language governing permissions and |
|
15 | * limitations under the License. |
|
16 | */ |
|
17 | package org.apache.commons.scxml.model; |
|
18 | ||
19 | import java.util.ArrayList; |
|
20 | import java.util.Collection; |
|
21 | import java.util.Iterator; |
|
22 | import java.util.List; |
|
23 | ||
24 | import org.apache.commons.logging.Log; |
|
25 | import org.apache.commons.scxml.Context; |
|
26 | import org.apache.commons.scxml.ErrorReporter; |
|
27 | import org.apache.commons.scxml.Evaluator; |
|
28 | import org.apache.commons.scxml.EventDispatcher; |
|
29 | import org.apache.commons.scxml.SCInstance; |
|
30 | import org.apache.commons.scxml.SCXMLExpressionException; |
|
31 | ||
32 | /** |
|
33 | * The class in this SCXML object model that corresponds to the |
|
34 | * <if> SCXML element, which serves as a container for conditionally |
|
35 | * executed elements. <else> and <elseif> can optionally |
|
36 | * appear within an <if> as immediate children, and serve to partition |
|
37 | * the elements within an <if>. |
|
38 | * |
|
39 | */ |
|
40 | public class If extends Action { |
|
41 | ||
42 | /** |
|
43 | * Serial version UID. |
|
44 | */ |
|
45 | private static final long serialVersionUID = 1L; |
|
46 | ||
47 | /** |
|
48 | * An conditional expression which can be evaluated to true or false. |
|
49 | */ |
|
50 | private String cond; |
|
51 | ||
52 | /** |
|
53 | * The set of executable elements (those that inheriting from |
|
54 | * Action) that are contained in this <if> element. |
|
55 | */ |
|
56 | private List actions; |
|
57 | ||
58 | /** |
|
59 | * The boolean value that dictates whether the particular child action |
|
60 | * should be executed. |
|
61 | */ |
|
62 | private boolean execute; |
|
63 | ||
64 | /** |
|
65 | * Constructor. |
|
66 | */ |
|
67 | public If() { |
|
68 | 15 | super(); |
69 | 15 | this.actions = new ArrayList(); |
70 | 15 | this.execute = false; |
71 | 15 | } |
72 | ||
73 | /** |
|
74 | * Get the executable actions contained in this <if>. |
|
75 | * |
|
76 | * @return Returns the actions. |
|
77 | */ |
|
78 | public final List getActions() { |
|
79 | 4 | return actions; |
80 | } |
|
81 | ||
82 | /** |
|
83 | * Add an Action to the list of executable actions contained in |
|
84 | * this <if>. |
|
85 | * |
|
86 | * @param action The action to add. |
|
87 | */ |
|
88 | public final void addAction(final Action action) { |
|
89 | 34 | if (action != null) { |
90 | 34 | this.actions.add(action); |
91 | } |
|
92 | 34 | } |
93 | ||
94 | /** |
|
95 | * Get the conditional expression. |
|
96 | * |
|
97 | * @return Returns the cond. |
|
98 | */ |
|
99 | public final String getCond() { |
|
100 | 4 | return cond; |
101 | } |
|
102 | ||
103 | /** |
|
104 | * Set the conditional expression. |
|
105 | * |
|
106 | * @param cond The cond to set. |
|
107 | */ |
|
108 | public final void setCond(final String cond) { |
|
109 | 15 | this.cond = cond; |
110 | 15 | } |
111 | ||
112 | /** |
|
113 | * {@inheritDoc} |
|
114 | */ |
|
115 | public void execute(final EventDispatcher evtDispatcher, |
|
116 | final ErrorReporter errRep, final SCInstance scInstance, |
|
117 | final Log appLog, final Collection derivedEvents) |
|
118 | throws ModelException, SCXMLExpressionException { |
|
119 | 9 | State parentState = getParentState(); |
120 | 9 | Context ctx = scInstance.getContext(parentState); |
121 | 9 | Evaluator eval = scInstance.getEvaluator(); |
122 | 9 | ctx.setLocal(getNamespacesKey(), getNamespaces()); |
123 | 9 | execute = eval.evalCond(ctx, cond).booleanValue(); |
124 | 9 | ctx.setLocal(getNamespacesKey(), null); |
125 | // The "if" statement is a "container" |
|
126 | 9 | for (Iterator ifiter = actions.iterator(); ifiter.hasNext();) { |
127 | 19 | Action aa = (Action) ifiter.next(); |
128 | 19 | if (execute && !(aa instanceof ElseIf) |
129 | && !(aa instanceof Else)) { |
|
130 | 9 | aa.execute(evtDispatcher, errRep, scInstance, appLog, |
131 | derivedEvents); |
|
132 | 10 | } else if (execute |
133 | && (aa instanceof ElseIf || aa instanceof Else)) { |
|
134 | 0 | break; |
135 | 8 | } else if (aa instanceof Else) { |
136 | 1 | execute = true; |
137 | 7 | } else if (aa instanceof ElseIf) { |
138 | 3 | ctx.setLocal(getNamespacesKey(), getNamespaces()); |
139 | 3 | execute = eval.evalCond(ctx, ((ElseIf) aa).getCond()) |
140 | .booleanValue(); |
|
141 | 3 | ctx.setLocal(getNamespacesKey(), null); |
142 | } |
|
143 | } |
|
144 | 9 | } |
145 | ||
146 | } |
|
147 |