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, IndexUseReporter, Optimizable, CompiledExpression

public class ValueComparison
extends GeneralComparison

Author:

Wolfgang Meier (wolfgang@exist-db.org)

Nested Class Summary

Nested classes/interfaces inherited from class org.exist.xquery.GeneralComparison

GeneralComparison.IndexFlags

Field Summary

Fields inherited from interface org.exist.xquery.Expression

DOT_TEST, EXPRESSION_ID_INVALID, IGNORE_CONTEXT, IN_NODE_CONSTRUCTOR, IN_PREDICATE, IN_UPDATE, IN_WHERE_CLAUSE, NEED_INDEX_INFO, NO_CONTEXT_ID, POSITIONAL_PREDICATE, SINGLE_STEP_EXECUTION, USE_TREE_TRAVERSAL

Constructor Summary

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

ValueComparison(XQueryContext context, int relation)

Method Summary

static boolean	compareAtomic(Collator collator, AtomicValue lv, AtomicValue rv, int truncation, int relation) Cast the atomic operands into a comparable type and compare them.
void	dump(ExpressionDumper dumper) Write a diagnostic dump of the expression to the passed ExpressionDumper.
String	toString()

Methods inherited from class org.exist.xquery.GeneralComparison

accept, analyze, canOptimize, checkForQNameIndex, eval, getDependencies, getOptimizeAxis, getRelation, hasUsedIndex, optimizeOnSelf, preSelect, resetState, returnsType, setCollation

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, getCardinality, getColumn, getContext, getDocumentSet, getExpression, getLastExpression, getLength, getLine, getLiteralValue, getParent, getPrimaryAxis, isValid, replaceExpression, replaceLastExpression, reset, setContext, setPrimaryAxis, setUseStaticContext

Methods inherited from class org.exist.xquery.AbstractExpression

eval, getContextDocSet, getContextId, getExpressionId, getSource, setASTNode, setLocation

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.exist.xquery.Expression

eval, getCardinality, getColumn, getContext, getContextDocSet, getContextId, getExpressionId, getLine, getPrimaryAxis, getSource, setASTNode, setContextDocSet, setLocation, setPrimaryAxis

Methods inherited from interface org.exist.xquery.CompiledXQuery

eval, getSource

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

compareAtomic

public static boolean compareAtomic(Collator collator,
                                    AtomicValue lv,
                                    AtomicValue rv,
                                    int truncation,
                                    int relation)
                             throws XPathException

Cast the atomic operands into a comparable type and compare them.

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

Parameters:

dumper - the expression dumper to write to

toString

public String toString()

Overrides:

toString in class GeneralComparison