org.exist.xquery
Class Predicate

java.lang.Object
  extended byorg.exist.xquery.AbstractExpression
      extended byorg.exist.xquery.PathExpr
          extended byorg.exist.xquery.Predicate
All Implemented Interfaces:
CompiledExpression, CompiledXQuery, Expression

public class Predicate
extends PathExpr

Handles predicate expressions.

Author:
Wolfgang Meier

Field Summary
 
Fields inherited from interface org.exist.xquery.Expression
DOT_TEST, EXPRESSION_ID_INVALID, IGNORE_CONTEXT, IN_PREDICATE, IN_UPDATE, IN_WHERE_CLAUSE, NO_CONTEXT_ID, SINGLE_STEP_EXECUTION
 
Constructor Summary
Predicate(XQueryContext context)
           
 
Method Summary
 void analyze(AnalyzeContextInfo contextInfo)
          Statically analyze the expression and its subexpressions.
 void dump(ExpressionDumper dumper)
          Write a diagnostic dump of the expression to the passed ExpressionDumper.
 Sequence evalPredicate(Sequence outerSequence, Sequence contextSequence, int mode)
           
 int getDependencies()
          Returns Dependency.DEFAULT_DEPENDENCIES.
 void resetState()
          Called to inform an expression that it should reset to its initial state.
 void setContextDocSet(DocumentSet contextSet)
           
 java.lang.String toString()
           
 
Methods inherited from class org.exist.xquery.PathExpr
accept, add, add, addPath, addPredicate, dump, eval, getASTNode, getCardinality, getContext, getDocumentSet, getExpression, getLastExpression, getLength, getLiteralValue, getSource, isValid, replaceLastExpression, reset, returnsType, setContext, setPrimaryAxis, setSource
 
Methods inherited from class org.exist.xquery.AbstractExpression
eval, getContextDocSet, getContextId, getExpressionId, setASTNode
 
Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, wait, wait, wait
 
Methods inherited from interface org.exist.xquery.CompiledXQuery
eval
 

Constructor Detail

Predicate

public Predicate(XQueryContext context)
Method Detail

getDependencies

public int getDependencies()
Description copied from class: AbstractExpression
Returns Dependency.DEFAULT_DEPENDENCIES.

Specified by:
getDependencies in interface Expression
Overrides:
getDependencies in class PathExpr

analyze

public void analyze(AnalyzeContextInfo contextInfo)
             throws XPathException
Description copied from interface: Expression
Statically analyze the expression and its subexpressions. During the static analysis phase, the query engine can detect unknown variables and some type errors.

Specified by:
analyze in interface Expression
Overrides:
analyze in class PathExpr
Throws:
XPathException

evalPredicate

public Sequence evalPredicate(Sequence outerSequence,
                              Sequence contextSequence,
                              int mode)
                       throws XPathException
Throws:
XPathException

setContextDocSet

public void setContextDocSet(DocumentSet contextSet)
Specified by:
setContextDocSet in interface Expression
Overrides:
setContextDocSet in class AbstractExpression

resetState

public void resetState()
Description copied from interface: Expression
Called to inform an expression that it should reset to its initial state. All cached data in the expression object should be dropped. For example, the document() function calls this method whenever the input document set has changed.

Specified by:
resetState in interface Expression
Overrides:
resetState in class PathExpr

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 PathExpr

toString

public java.lang.String toString()
Overrides:
toString in class PathExpr


Copyright (C) Wolfgang Meier. All rights reserved.