Package net.sf.saxon.functions
Class NamePart
java.lang.Object
net.sf.saxon.expr.ComputedExpression
net.sf.saxon.expr.FunctionCall
net.sf.saxon.functions.SystemFunction
net.sf.saxon.functions.NamePart
- All Implemented Interfaces:
Serializable
,SourceLocator
,Container
,Expression
,InstructionInfoProvider
This class supports the name(), local-name(), and namespace-uri() functions
from XPath 1.0, and also the XSLT generate-id() function
- See Also:
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Field Summary
FieldsModifier and TypeFieldDescriptionstatic final int
static final int
static final int
static final int
static final int
static final int
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
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionint
Determine the special properties of this expression.Evaluate the function in a string contextstatic boolean
Test whether an expression is a call on the generate-id() functionsimplify
(StaticContext env) Simplify and validate.Methods inherited from class net.sf.saxon.functions.SystemFunction
addContextDocumentArgument, checkArguments, computeCardinality, display, getDetails, getErrorCodeForTypeErrors, getItemType, getRequiredType, main, makeSystemFunction, setDetails, useContextItemAsDefault
Methods inherited from class net.sf.saxon.expr.FunctionCall
checkArgumentCount, getArguments, getDisplayName, getFunctionNameCode, getNumberOfArguments, iterateSubExpressions, optimize, preEvaluate, promote, replaceSubExpression, setArguments, setFunctionNameCode, simplifyArguments, typeCheck
Methods inherited from class net.sf.saxon.expr.ComputedExpression
adoptChildExpression, checkPermittedContents, computeDependencies, computeStaticProperties, doPromotion, dynamicError, effectiveBooleanValue, evaluateAsString, getCardinality, getColumnNumber, getConstructType, getDependencies, getExecutable, getHostLanguage, getImplementationMethod, getInstructionInfo, getIntrinsicDependencies, getLineNumber, getLocationId, getLocationProvider, getParentExpression, getPublicId, getSlotsUsed, getSpecialProperties, getSystemId, hasBadParentPointer, iterate, markTailFunctionCalls, process, resetStaticProperties, setLocationId, setParentExpression, setParentExpression, suppressValidation, typeError
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Field Details
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NAME
public static final int NAME- See Also:
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LOCAL_NAME
public static final int LOCAL_NAME- See Also:
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NAMESPACE_URI
public static final int NAMESPACE_URI- See Also:
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GENERATE_ID
public static final int GENERATE_ID- See Also:
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DOCUMENT_URI
public static final int DOCUMENT_URI- See Also:
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NODE_NAME
public static final int NODE_NAME- See Also:
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Constructor Details
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NamePart
public NamePart()
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Method Details
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simplify
Simplify and validate.- Specified by:
simplify
in interfaceExpression
- Overrides:
simplify
in classFunctionCall
- Parameters:
env
- the static context- Returns:
- the simplified expression
- Throws:
XPathException
- if an error is discovered during expression rewriting
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computeSpecialProperties
public int computeSpecialProperties()Determine the special properties of this expression. The generate-id() function is a special case: it is considered creative if its operand is creative, so that generate-id(f()) is not taken out of a loop- Overrides:
computeSpecialProperties
in classSystemFunction
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evaluateItem
Evaluate the function in a string context- Specified by:
evaluateItem
in interfaceExpression
- Overrides:
evaluateItem
in classComputedExpression
- Parameters:
c
- 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
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isGenerateIdFunction
Test whether an expression is a call on the generate-id() function- Parameters:
exp
- the expression to be tested- Returns:
- true if exp is a call on generate-id(), else false
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