org.exist.xquery.functions.text
Class MatchRegexp

java.lang.Object
  extended byorg.exist.xquery.AbstractExpression
      extended byorg.exist.xquery.PathExpr
          extended byorg.exist.xquery.Function
              extended byorg.exist.xquery.functions.text.MatchRegexp
All Implemented Interfaces:
CompiledExpression, CompiledXQuery, Expression

public class MatchRegexp
extends Function

Author:
wolf

Field Summary
static java.lang.String MATCH_ALL_FLAG
           
static FunctionSignature[] signatures
           
 
Fields inherited from class org.exist.xquery.Function
BUILTIN_FUNCTION_NS
 
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
MatchRegexp(XQueryContext context, FunctionSignature signature)
           
 
Method Summary
 Sequence eval(Sequence contextSequence, Item contextItem)
          Evaluate the expression represented by this object.
 Sequence evalQuery(NodeSet nodes, java.util.List terms, boolean matchAll)
           
 int getDependencies()
          Returns Dependency.DEFAULT_DEPENDENCIES.
 void resetState()
          Called to inform an expression that it should reset to its initial state.
 
Methods inherited from class org.exist.xquery.Function
analyze, createFunction, dump, getArgument, getArgumentCount, getArguments, getASTNode, getCardinality, getName, getParent, getSignature, isCalledAs, returnsType, setArguments, setASTNode, setParent, setPrimaryAxis, toString
 
Methods inherited from class org.exist.xquery.PathExpr
accept, add, add, addPath, addPredicate, dump, getContext, getDocumentSet, getExpression, getLastExpression, getLength, getLiteralValue, getSource, isValid, replaceLastExpression, reset, setContext, setSource
 
Methods inherited from class org.exist.xquery.AbstractExpression
eval, getContextDocSet, getContextId, getExpressionId, setContextDocSet
 
Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, wait, wait, wait
 
Methods inherited from interface org.exist.xquery.CompiledXQuery
eval
 

Field Detail

signatures

public static final FunctionSignature[] signatures

MATCH_ALL_FLAG

public static final java.lang.String MATCH_ALL_FLAG
See Also:
Constant Field Values
Constructor Detail

MatchRegexp

public MatchRegexp(XQueryContext context,
                   FunctionSignature signature)
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 Function

eval

public Sequence eval(Sequence contextSequence,
                     Item contextItem)
              throws XPathException
Description copied from interface: Expression
Evaluate the expression represented by this object. Depending on the context in which this expression is executed, either the context sequence, the context item or both of them may be set. An implementing class should know how to handle this. The general contract is as follows: if the Dependency.CONTEXT_ITEM bit is set in the bit field returned by Expression.getDependencies(), the eval method will be called once for every item in the context sequence. The contextItem parameter will be set to the current item. Otherwise, the eval method will only be called once for the whole context sequence and contextItem will be null. eXist tries to process the entire context set in one, single step whenever possible. Thus, most classes only expect context to contain a list of nodes which represents the current context of the expression. The position() function in XPath is an example for an expression, which requires both, context sequence and context item to be set. The context sequence might be a node set, a sequence of atomic values or a single node or atomic value.

Specified by:
eval in interface Expression
Specified by:
eval in class Function
Throws:
XPathException

evalQuery

public Sequence evalQuery(NodeSet nodes,
                          java.util.List terms,
                          boolean matchAll)
                   throws XPathException
Throws:
XPathException

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


Copyright (C) Wolfgang Meier. All rights reserved.