org.exist.xquery
Class ValueComparison

java.lang.Object
  org.exist.xquery.AbstractExpression
      org.exist.xquery.PathExpr
          org.exist.xquery.BinaryOp
              org.exist.xquery.GeneralComparison
                  org.exist.xquery.ValueComparison

All Implemented Interfaces:

CompiledXQuery, Expression

public class ValueComparison

extends GeneralComparison

Author:

Wolfgang Meier (wolfgang@exist-db.org)

Field Summary

Fields inherited from class org.exist.xquery.GeneralComparison

cached, collationArg, inWhereClause, relation, truncation

Fields inherited from class org.exist.xquery.PathExpr

inPredicate, keepVirtual, LOG, source, steps

Fields inherited from class org.exist.xquery.AbstractExpression

astNode, context, contextDocSet, contextId

Fields inherited from interface org.exist.xquery.Expression

EXPRESSION_ID_INVALID, IGNORE_CONTEXT, IN_PREDICATE, IN_UPDATE, IN_WHERE_CLAUSE, NO_CONTEXT_ID, SINGLE_STEP_EXECUTION

Constructor Summary

ValueComparison(XQueryContext context, Expression left, Expression right, int relation)

ValueComparison(XQueryContext context, int relation)

Method Summary

void	dump(ExpressionDumper dumper) Write a diagnostic dump of the expression to the passed ExpressionDumper.
protected Sequence	genericCompare(Sequence contextSequence, Item contextItem) Generic, slow implementation.
protected Sequence	nodeSetCompare(NodeSet nodes, Sequence contextSequence)
java.lang.String	toString()

Methods inherited from class org.exist.xquery.GeneralComparison

analyze, compareAtomic, compareValues, eval, getCollator, getDependencies, nodeSetCompare, quickNodeSetCompare, resetState, returnsType, setCollation, simplify, switchOperands

Methods inherited from class org.exist.xquery.BinaryOp

getLeft, getRight, setContextDocSet, setLeft, setRight

Methods inherited from class org.exist.xquery.PathExpr

add, add, addPath, addPredicate, dump, getASTNode, getContext, getDocumentSet, getExpression, getLastExpression, getLength, getLiteralValue, getSource, isValid, replaceLastExpression, reset, setContext, setPrimaryAxis, setSource

Methods inherited from class org.exist.xquery.AbstractExpression

eval, getCardinality, getContextDocSet, getContextId, getExpressionId, setASTNode

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.exist.xquery.CompiledXQuery

eval

Constructor Detail

ValueComparison

public ValueComparison(XQueryContext context,
                       int relation)

Parameters:

context -

relation -

ValueComparison

public ValueComparison(XQueryContext context,
                       Expression left,
                       Expression right,
                       int relation)

Parameters:

context -

left -

right -

relation -

Method Detail

genericCompare

protected Sequence genericCompare(Sequence contextSequence,
                                  Item contextItem)
                           throws XPathException

Description copied from class: GeneralComparison

Generic, slow implementation. Applied if none of the possible optimizations can be used.

Overrides:

genericCompare in class GeneralComparison

Parameters:

contextSequence -

contextItem -

Returns:

Throws:

XPathException

nodeSetCompare

protected Sequence nodeSetCompare(NodeSet nodes,
                                  Sequence contextSequence)
                           throws XPathException

Overrides:

nodeSetCompare in class GeneralComparison

Throws:

XPathException

dump

public void dump(ExpressionDumper dumper)

Description copied from interface: Expression

Write a diagnostic dump of the expression to the passed ExpressionDumper.

Specified by:

dump in interface Expression

Overrides:

dump in class GeneralComparison

toString

public java.lang.String toString()

Overrides:

toString in class GeneralComparison