Package org.apache.log4j.rule
Class RuleFactory
- java.lang.Object
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- org.apache.log4j.rule.RuleFactory
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public final class RuleFactory extends java.lang.Object
A Factory class which, given a string representation of the rule, and a context stack, will return a Rule ready for evaluation against events. If an operator is requested that isn't supported, an IllegalArgumentException is thrown.
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Field Summary
Fields Modifier and Type Field Description private static java.lang.String
AND_RULE
AND operator literal.private static java.lang.String
EQUALS_RULE
Equality operator literal.private static java.lang.String
EXISTS_RULE
Exists operator literal.private static RuleFactory
FACTORY
Singleton instance.private static java.lang.String
GREATER_THAN_EQUALS_RULE
Greater than or equal operator literal.private static java.lang.String
GREATER_THAN_RULE
Greater than operator literal.private static java.lang.String
LESS_THAN_EQUALS_RULE
Less than or equal operator literal.private static java.lang.String
LESS_THAN_RULE
Less than operator literal.private static java.lang.String
LIKE_RULE
Like operator literal.private static java.lang.String
NOT_EQUALS_RULE
Inequality operator literal.private static java.lang.String
NOT_RULE
NOT operator literal.private static java.lang.String
OR_RULE
OR operator literal.private static java.lang.String
PARTIAL_TEXT_MATCH_RULE
Partial match operator literal.private static java.util.Collection
RULES
Rules.
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Constructor Summary
Constructors Modifier Constructor Description private
RuleFactory()
Create instance.
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description static RuleFactory
getInstance()
Get instance.Rule
getRule(java.lang.String symbol, java.util.Stack stack)
Create rule from applying operator to stack.boolean
isRule(java.lang.String symbol)
Determine if specified string is a known operator.
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Field Detail
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FACTORY
private static final RuleFactory FACTORY
Singleton instance.
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RULES
private static final java.util.Collection RULES
Rules.
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AND_RULE
private static final java.lang.String AND_RULE
AND operator literal.- See Also:
- Constant Field Values
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OR_RULE
private static final java.lang.String OR_RULE
OR operator literal.- See Also:
- Constant Field Values
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NOT_RULE
private static final java.lang.String NOT_RULE
NOT operator literal.- See Also:
- Constant Field Values
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NOT_EQUALS_RULE
private static final java.lang.String NOT_EQUALS_RULE
Inequality operator literal.- See Also:
- Constant Field Values
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EQUALS_RULE
private static final java.lang.String EQUALS_RULE
Equality operator literal.- See Also:
- Constant Field Values
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PARTIAL_TEXT_MATCH_RULE
private static final java.lang.String PARTIAL_TEXT_MATCH_RULE
Partial match operator literal.- See Also:
- Constant Field Values
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LIKE_RULE
private static final java.lang.String LIKE_RULE
Like operator literal.- See Also:
- Constant Field Values
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EXISTS_RULE
private static final java.lang.String EXISTS_RULE
Exists operator literal.- See Also:
- Constant Field Values
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LESS_THAN_RULE
private static final java.lang.String LESS_THAN_RULE
Less than operator literal.- See Also:
- Constant Field Values
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GREATER_THAN_RULE
private static final java.lang.String GREATER_THAN_RULE
Greater than operator literal.- See Also:
- Constant Field Values
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LESS_THAN_EQUALS_RULE
private static final java.lang.String LESS_THAN_EQUALS_RULE
Less than or equal operator literal.- See Also:
- Constant Field Values
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GREATER_THAN_EQUALS_RULE
private static final java.lang.String GREATER_THAN_EQUALS_RULE
Greater than or equal operator literal.- See Also:
- Constant Field Values
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Method Detail
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getInstance
public static RuleFactory getInstance()
Get instance.- Returns:
- rule factory instance.
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isRule
public boolean isRule(java.lang.String symbol)
Determine if specified string is a known operator.- Parameters:
symbol
- string- Returns:
- true if string is a known operator
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getRule
public Rule getRule(java.lang.String symbol, java.util.Stack stack)
Create rule from applying operator to stack.- Parameters:
symbol
- symbolstack
- stack- Returns:
- new instance
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