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java.lang.Objectorg.apache.log4j.rule.InFixToPostFix
public class InFixToPostFix
A helper class which converts infix expressions to postfix expressions
Currently grouping is supported, as well as all of the
Rules supported by RuleFactory
NOTE: parsing is supported through the use of StringTokenizer
,
which means all tokens in the expression must be separated by spaces.
Supports grouping via parens, mult-word operands using single quotes,
and these operators:
! NOT operator
!= NOT EQUALS operator
== EQUALS operator
~= CASE-INSENSITIVE equals operator
|| OR operator
&& AND operator
like REGEXP operator
exists NOT NULL operator
< LESS THAN operator
> GREATER THAN operator
<= LESS THAN EQUALS operator
>= GREATER THAN EQUALS operator
Constructor Summary | |
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InFixToPostFix()
Create new instance. |
Method Summary | |
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java.lang.String |
convert(java.lang.String expression)
Convert in-fix expression to post-fix. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public InFixToPostFix()
Method Detail |
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public java.lang.String convert(java.lang.String expression)
expression
- in-fix expression.
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