Package net.sf.saxon.functions
Class NamePart
- java.lang.Object
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- net.sf.saxon.expr.ComputedExpression
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- net.sf.saxon.expr.FunctionCall
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- net.sf.saxon.functions.SystemFunction
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- net.sf.saxon.functions.NamePart
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- All Implemented Interfaces:
java.io.Serializable
,javax.xml.transform.SourceLocator
,Container
,Expression
,InstructionInfoProvider
public class NamePart extends SystemFunction
This class supports the name(), local-name(), and namespace-uri() functions from XPath 1.0, and also the XSLT generate-id() function- See Also:
- Serialized Form
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Field Summary
Fields Modifier and Type Field Description static int
DOCUMENT_URI
static int
GENERATE_ID
static int
LOCAL_NAME
static int
NAME
static int
NAMESPACE_URI
static int
NODE_NAME
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Fields inherited from class net.sf.saxon.functions.SystemFunction
operation
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Fields inherited from class net.sf.saxon.expr.FunctionCall
argument
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Fields inherited from class net.sf.saxon.expr.ComputedExpression
locationId, staticProperties
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Fields inherited from interface net.sf.saxon.expr.Expression
EVALUATE_METHOD, ITERATE_METHOD, PROCESS_METHOD
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Constructor Summary
Constructors Constructor Description NamePart()
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description int
computeSpecialProperties()
Determine the special properties of this expression.Item
evaluateItem(XPathContext c)
Evaluate the function in a string contextstatic boolean
isGenerateIdFunction(Expression exp)
Test whether an expression is a call on the generate-id() functionExpression
simplify(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
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Methods inherited from class net.sf.saxon.expr.FunctionCall
checkArgumentCount, getArguments, getDisplayName, getFunctionNameCode, getNumberOfArguments, iterateSubExpressions, optimize, preEvaluate, promote, replaceSubExpression, setArguments, setFunctionNameCode, simplifyArguments, typeCheck
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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 Detail
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NAME
public static final int NAME
- See Also:
- Constant Field Values
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LOCAL_NAME
public static final int LOCAL_NAME
- See Also:
- Constant Field Values
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NAMESPACE_URI
public static final int NAMESPACE_URI
- See Also:
- Constant Field Values
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GENERATE_ID
public static final int GENERATE_ID
- See Also:
- Constant Field Values
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DOCUMENT_URI
public static final int DOCUMENT_URI
- See Also:
- Constant Field Values
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NODE_NAME
public static final int NODE_NAME
- See Also:
- Constant Field Values
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Method Detail
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simplify
public Expression simplify(StaticContext env) throws XPathException
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
public Item evaluateItem(XPathContext c) throws XPathException
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
public static boolean isGenerateIdFunction(Expression exp)
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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