Package org.apache.log4j.rule
Class ExistsRule
java.lang.Object
org.apache.log4j.rule.AbstractRule
org.apache.log4j.rule.ExistsRule
- All Implemented Interfaces:
Serializable
,Rule
A Rule class implementing a not null (and not empty string) check.
- See Also:
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Field Summary
FieldsModifier and TypeFieldDescriptionprivate final String
field name.private static final LoggingEventFieldResolver
field resolver.(package private) static final long
Serialization id. -
Constructor Summary
Constructors -
Method Summary
Methods inherited from class org.apache.log4j.rule.AbstractRule
addPropertyChangeListener, firePropertyChange, firePropertyChange, removePropertyChangeListener
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Field Details
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serialVersionUID
static final long serialVersionUIDSerialization id.- See Also:
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RESOLVER
field resolver. -
field
field name.
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Constructor Details
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ExistsRule
Create new instance.- Parameters:
fld
- field name.
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Method Details
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getRule
Get an instance of ExistsRule.- Parameters:
field
- field.- Returns:
- instance of ExistsRule.
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getRule
Create an instance of ExistsRule using the top name on the stack.- Parameters:
stack
- stack- Returns:
- instance of ExistsRule.
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evaluate
Returns true if this implementation of the rule accepts the LoggingEvent, or false if not.What True/False means can be client-specific.
- Parameters:
event
- LoggingEvent this instance will evaluatematches
- a Map of event field keys to Sets of matching strings (may be null) which will be updated during execution of this method to include field and string matches based on the rule evaluation results- Returns:
- true if this Rule instance accepts the event, otherwise false.
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