org.ceryle.wiki.plugin.assertion
Class Predicate

java.lang.Object
  org.ceryle.wiki.plugin.query.operators.Operator
      org.ceryle.wiki.plugin.assertion.Predicate

public class Predicate
extends Operator

The generalized Predicate Operator, a component of a query expression. This returns true if the predicate exists and is a known WikiVerb.

Author:

Murray Altheim

Field Summary

static Predicate	PROPERTY_ASSIGNMENT The Predicate constant used for property assignment.
static String	PROPERTY_NAME The canonical name of the predicate used for property assignments.

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

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

Constructor Summary

Predicate(String name)

Method Summary

boolean	evaluateOperator(Operand left, Operand right, Modifier modifier, ReferenceInfoProvider refInfoProvider, String pageName)
String	getPageName() Returns the name of this Predicate (returns the same thing as both Operator.getName() and Operator.toString()).
boolean	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

Field Detail

PROPERTY_NAME

public static final String PROPERTY_NAME

The canonical name of the predicate used for property assignments. The value is "HasProperty".

See Also:

Constant Field Values

PROPERTY_ASSIGNMENT

public static final Predicate PROPERTY_ASSIGNMENT

The Predicate constant used for property assignment.

Constructor Detail

Predicate

public Predicate(String name)

Method Detail

isInfix

public boolean isInfix()

Overrides:

isInfix in class Operator

getPageName

public String getPageName()

Returns the name of this Predicate (returns the same thing as both Operator.getName() and Operator.toString()). This is made available simply for consistency with the same-named method in Term.

evaluateOperator

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

Specified by:

evaluateOperator in class Operator

Throws:

QueryException