org.ceryle.wiki.plugin.tag
Class TagManagerImpl.HasTagModifier

java.lang.Object
  org.ceryle.wiki.plugin.query.operators.Operator
      org.ceryle.wiki.plugin.query.operators.IsModifier
          org.ceryle.wiki.plugin.tag.TagManagerImpl.HasTagModifier

All Implemented Interfaces:

Modifier

Enclosing class:

TagManagerImpl

public class TagManagerImpl.HasTagModifier
extends IsModifier
implements Modifier

A substitution for the IS Operator as a component of a query expression. Rather than match on wiki page name, this matches on whether the page contains a matching tag, using methods from the TagManager.

Author:

Murray Altheim

Field Summary

Fields inherited from class org.ceryle.wiki.plugin.query.operators.IsModifier

permitRegex

Fields inherited from class org.ceryle.wiki.plugin.query.operators.Operator

_ALL, _AND, _ANY, _BY, _FROM, _IS, _NOT, _NULL, _OR, _TO

Constructor Summary

TagManagerImpl.HasTagModifier(TagManager tagManager)

Method Summary

boolean	applyModifier(ReferenceInfoProvider refInfoProvider, String candidateName, String termName) Evaluates to true if candidateName IS termName.
boolean	evaluateOperator(Operand left, Operand right, Modifier modifier, ReferenceInfoProvider refInfoProvider, String pageName) The left operand is expected to be Operand.NULL, evaluate the right using this as the modifier.

Methods inherited from class org.ceryle.wiki.plugin.query.operators.IsModifier

isInfix

Methods inherited from class org.ceryle.wiki.plugin.query.operators.Operator

getName, isPrefix, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

TagManagerImpl.HasTagModifier

public TagManagerImpl.HasTagModifier(TagManager tagManager)

Method Detail

evaluateOperator

public boolean evaluateOperator(Operand left,
                                Operand right,
                                Modifier modifier,
                                ReferenceInfoProvider refInfoProvider,
                                String pageName)
                         throws QueryException

The left operand is expected to be Operand.NULL, evaluate the right using this as the modifier.

Overrides:

evaluateOperator in class IsModifier

Throws:

QueryException

See Also:

Operator.evaluateOperator(Operand, Operand, Modifier, ReferenceInfoProvider, String)

applyModifier

public boolean applyModifier(ReferenceInfoProvider refInfoProvider,
                             String candidateName,
                             String termName)

Evaluates to true if candidateName IS termName. If regular expressions are permitted then the candidateName is evaluated against a regular expression match. If the regex pattern is invalid, returns the default behaviour of a direct, case-insensitive match.

This extends the method in IsModifier by returning a match on tag rather than page name if the TagManager is available.

Specified by:

applyModifier in interface Modifier

Overrides:

applyModifier in class IsModifier

See Also:

IsModifier.permitRegex, Modifier.applyModifier(ReferenceInfoProvider, String, String)