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1
20
21 package net.innig.macker.rule;
22
23 import net.innig.macker.event.MackerEvent;
24 import net.innig.macker.event.MackerEventListener;
25 import net.innig.macker.event.MackerIsMadException;
26 import net.innig.macker.event.ListenerException;
27 import net.innig.macker.structure.ClassManager;
28
29 import java.util.*;
30
31 public class EvaluationContext
32 {
33 public EvaluationContext(ClassManager classManager, RuleSet ruleSet)
34 {
35 this.classManager = classManager;
36 this.ruleSet = ruleSet;
37 varValues = new HashMap();
38 listeners = new HashSet();
39 }
40
41 public EvaluationContext(RuleSet ruleSet, EvaluationContext parent)
42 {
43 this(parent.getClassManager(), ruleSet);
44 this.parent = parent;
45 }
46
47 public EvaluationContext(EvaluationContext parent)
48 { this(parent.getRuleSet(), parent); }
49
50 public EvaluationContext getParent()
51 { return parent; }
52
53 public ClassManager getClassManager()
54 { return classManager; }
55
56 public RuleSet getRuleSet()
57 { return ruleSet; }
58
59 public void setVariableValue(String  name, String value)
60 throws UndeclaredVariableException
61 { varValues.put(name, (value == null) ? "" : VariableParser.parse(this, value)); }
62
63 public String getVariableValue(String name)
64 throws UndeclaredVariableException
65 {
66 String value = (String ) varValues.get(name);
67 if(value != null)
68 return value;
69 if(parent != null)
70 return parent.getVariableValue(name);
71 throw new UndeclaredVariableException(name);
72 }
73
74 public void setVariables(Map vars)
75 { varValues.putAll(vars); }
76
77 public void addListener(MackerEventListener listener)
78 { listeners.add(listener); }
79
80 public void removeListener(MackerEventListener listener)
81 { listeners.remove(listener); }
82
83 public void broadcastStarted()
84 throws ListenerException
85 { broadcastStarted(getRuleSet()); }
86
87 protected void broadcastStarted(RuleSet targetRuleSet)
88 throws ListenerException
89 {
90 for(Iterator i = listeners.iterator(); i.hasNext(); )
91 ((MackerEventListener) i.next()).mackerStarted(targetRuleSet);
92 if(getParent() != null)
93 getParent().broadcastStarted(targetRuleSet);
94 }
95
96 public void broadcastFinished()
97 throws MackerIsMadException, ListenerException
98 { broadcastFinished(getRuleSet()); }
99
100 protected void broadcastFinished(RuleSet targetRuleSet)
101 throws MackerIsMadException, ListenerException
102 {
103 for(Iterator i = listeners.iterator(); i.hasNext(); )
104 ((MackerEventListener) i.next()).mackerFinished(targetRuleSet);
105 if(getParent() != null)
106 getParent().broadcastFinished(targetRuleSet);
107 }
108
109 public void broadcastAborted()
110 { broadcastAborted(getRuleSet()); }
111
112 protected void broadcastAborted(RuleSet targetRuleSet)
113 {
114 for(Iterator i = listeners.iterator(); i.hasNext(); )
115 ((MackerEventListener) i.next()).mackerAborted(targetRuleSet);
116 if(getParent() != null)
117 getParent().broadcastAborted(targetRuleSet);
118 }
119
120 public void broadcastEvent(MackerEvent event)
121 throws MackerIsMadException, ListenerException
122 { broadcastEvent(event, getRuleSet()); }
123
124 protected void broadcastEvent(MackerEvent event, RuleSet targetRuleSet)
125 throws MackerIsMadException, ListenerException
126 {
127 for(Iterator i = listeners.iterator(); i.hasNext(); )
128 ((MackerEventListener) i.next()).handleMackerEvent(targetRuleSet, event);
129 if(getParent() != null)
130 getParent().broadcastEvent(event, targetRuleSet);
131 }
132
133 private RuleSet ruleSet;
134 private EvaluationContext parent;
135 private Map varValues;
136 private Set listeners;
137 private ClassManager classManager;
138 }
139
140
141
142 |
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