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18 package org.apache.log4j.chainsaw;
19
20 import org.apache.log4j.rule.AbstractRule;
21 import org.apache.log4j.rule.Rule;
22 import org.apache.log4j.spi.LoggingEvent;
23
24 import java.beans.PropertyChangeEvent;
25 import java.beans.PropertyChangeListener;
26 import java.util.Map;
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39 public class RuleMediator extends AbstractRule {
40 private Rule loggerRule;
41 private Rule filterRule;
42 private Rule findRule;
43 private final PropertyChangeListener ruleChangerNotifier = new RuleChangerNotifier();
44 private boolean findRuleRequired;
45
46 public RuleMediator(boolean findRuleRequired) {
47 this.findRuleRequired = findRuleRequired;
48 }
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52
53 public boolean evaluate(LoggingEvent e, Map matches) {
54 if (findRuleRequired) {
55 if (findRule == null) {
56 return false;
57 }
58 if (!findRule.evaluate(e, null)) {
59 return false;
60 }
61 }
62
63 return (loggerRule == null || loggerRule.evaluate(e, null)) && (filterRule == null || filterRule.evaluate(e, null));
64
65 }
66
67 public boolean isFindRuleRequired() {
68 return findRuleRequired;
69 }
70
71 public void setFilterRule(Rule r) {
72 Rule oldFilterRule = this.filterRule;
73 this.filterRule = r;
74 firePropertyChange("filterRule", oldFilterRule, this.filterRule);
75 }
76
77 public void setFindRule(Rule r) {
78 Rule oldFindRule = this.findRule;
79 this.findRule = r;
80 firePropertyChange("findRule", oldFindRule, this.findRule);
81 }
82
83 public void setLoggerRule(Rule r) {
84 Rule oldLoggerRule = this.loggerRule;
85 this.loggerRule = r;
86 if (oldLoggerRule != null) {
87 oldLoggerRule.removePropertyChangeListener(ruleChangerNotifier);
88 }
89 this.loggerRule.addPropertyChangeListener(ruleChangerNotifier);
90 firePropertyChange("loggerRule", oldLoggerRule, this.loggerRule);
91 }
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98 private class RuleChangerNotifier implements PropertyChangeListener {
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102 public void propertyChange(PropertyChangeEvent evt) {
103 RuleMediator.this.firePropertyChange(evt);
104 }
105 }
106 }