org.ceryle.wiki.plugin.query
Interface Operand

All Known Implementing Classes:

Assertion, Expression, Operand.NullOperand, Property, Term

public interface Operand

An Operand is anything capable of being evaluated to see if a candidate pagename should be included in the query results. Expressions and Terms are Operands.

Author:

Murray Altheim, John Volkar (john.volkar at gmail.com)

Nested Class Summary

static class

Operand.NullOperand Utility inner class, defined here for convenience.

Field Summary

static Operand

NULL Use as the leftExpression of unary operators.

Method Summary

boolean

evaluateOperand(Modifier modifier, ReferenceInfoProvider refInfoProvider, String pageName) Evaluates the operand, returns the truth value.

Field Detail

NULL

static final Operand NULL

Use as the leftExpression of unary operators. It is essentially empty and always answers "true".

Method Detail

evaluateOperand

boolean evaluateOperand(Modifier modifier,
                        ReferenceInfoProvider refInfoProvider,
                        String pageName)
                        throws QueryException

Evaluates the operand, returns the truth value.

Throws:

QueryException