net.sf.saxon.functions
Class DeepEqual

java.lang.Object
  |
  +--net.sf.saxon.expr.ComputedExpression
        |
        +--net.sf.saxon.expr.FunctionCall
              |
              +--net.sf.saxon.functions.SystemFunction
                    |
                    +--net.sf.saxon.functions.CollatingFunction
                          |
                          +--net.sf.saxon.functions.DeepEqual
All Implemented Interfaces:
Container, Expression, InstructionInfoProvider, java.io.Serializable, javax.xml.transform.SourceLocator

public class DeepEqual
extends CollatingFunction

XSLT 2.0 deep-equal() function. Supports deep comparison of two sequences (of nodes and/or atomic values) optionally using a collation

See Also:
Serialized Form

Field Summary
 
Fields inherited from class net.sf.saxon.functions.SystemFunction
operation
 
Fields inherited from class net.sf.saxon.expr.FunctionCall
argument
 
Fields inherited from class net.sf.saxon.expr.ComputedExpression
locationId, staticProperties
 
Fields inherited from interface net.sf.saxon.expr.Expression
EVALUATE_METHOD, ITERATE_METHOD, PROCESS_METHOD
 
Constructor Summary
DeepEqual()
           
 
Method Summary
static boolean deepEquals(SequenceIterator op1, SequenceIterator op2, AtomicComparer collator, Configuration config)
          Determine when two sequences are deep-equal
 Item evaluateItem(XPathContext context)
          Evaluate the expression
 Expression preEvaluate(StaticContext env)
          preEvaluate: if all arguments are known statically, evaluate early
 
Methods inherited from class net.sf.saxon.functions.CollatingFunction
getAtomicComparer, getCollator
 
Methods inherited from class net.sf.saxon.functions.SystemFunction
addContextDocumentArgument, checkArguments, computeCardinality, display, getDetails, getItemType, getRequiredType, main, makeSystemFunction, setDetails, useContextItemAsDefault
 
Methods inherited from class net.sf.saxon.expr.FunctionCall
analyze, checkArgumentCount, getDisplayName, getFunctionNameCode, getNumberOfArguments, iterateSubExpressions, promote, setArguments, setFunctionNameCode, simplify, simplifyArguments
 
Methods inherited from class net.sf.saxon.expr.ComputedExpression
adoptChildExpression, computeDependencies, computeSpecialProperties, computeStaticProperties, dynamicError, dynamicError, effectiveBooleanValue, evaluateAsString, getCardinality, getColumnNumber, getConstructType, getDependencies, getExecutable, getImplementationMethod, getInstructionInfo, getIntrinsicDependencies, getLineNumber, getLocationId, getParentExpression, getPublicId, getSpecialProperties, getSystemId, iterate, markTailFunctionCalls, process, resetStaticProperties, setLocationId, setParentExpression, typeError
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

DeepEqual

public DeepEqual()
Method Detail

preEvaluate

public Expression preEvaluate(StaticContext env)
                       throws XPathException
preEvaluate: if all arguments are known statically, evaluate early

Overrides:
preEvaluate in class CollatingFunction
XPathException

evaluateItem

public Item evaluateItem(XPathContext context)
                  throws XPathException
Evaluate the expression

Specified by:
evaluateItem in interface Expression
Overrides:
evaluateItem in class ComputedExpression
Parameters:
context - The context in which the expression is to be evaluated
Returns:
the node or atomic value that results from evaluating the expression; or null to indicate that the result is an empty sequence
Throws:
XPathException - if any dynamic error occurs evaluating the expression

deepEquals

public static boolean deepEquals(SequenceIterator op1,
                                 SequenceIterator op2,
                                 AtomicComparer collator,
                                 Configuration config)
Determine when two sequences are deep-equal

Parameters:
op1 - the first sequence
op2 - the second sequence
collator - the collator to be used
config -
Returns:
true if the sequences are deep-equal