java.io.Serializable
, javax.xml.transform.SourceLocator
, LocationProvider
, SaxonLocator
, InstructionInfo
, org.xml.sax.Locator
public class NormalizeSpace extends SystemFunction
EFFECTIVE_BOOLEAN_VALUE, EVALUATE_METHOD, EVENT_FEED_METHOD, ITEM_FEED_METHOD, ITERATE_METHOD, locationId, MAX_SEQUENCE_LENGTH, MAX_STRING_LENGTH, PROCESS_METHOD, PUSH_SELECTION, staticProperties, UNBOUNDED_LOWER, UNBOUNDED_UPPER, WATCH_METHOD
argument
operation
Constructor | Description |
---|---|
NormalizeSpace() |
Modifier and Type | Method | Description |
---|---|---|
boolean |
effectiveBooleanValue(XPathContext c) |
Get the effective boolean value of the expression.
|
Item |
evaluateItem(XPathContext c) |
Evaluate in a general context
|
int |
getIntrinsicDependencies() |
Determine the intrinsic dependencies of an expression, that is, those which are not derived
from the dependencies of its subexpressions.
|
Expression |
preEvaluate(ExpressionVisitor visitor) |
Pre-evaluate a function at compile time.
|
Expression |
typeCheck(ExpressionVisitor visitor,
ExpressionVisitor.ContextItemType contextItemType) |
Type-check the expression.
|
addToPathMap, adoptChildExpression, checkForUpdatingSubexpressions, checkPermittedContents, computeDependencies, computeStaticProperties, doPromotion, dynamicError, evaluateAsString, evaluatePendingUpdates, explain, getCardinality, getColumnNumber, getColumnNumber, getConstructType, getContainer, getDependencies, getEvaluationMethod, getExecutable, getHostLanguage, getIntegerBounds, getLineNumber, getLineNumber, getLocationId, getLocationProvider, getObjectName, getProperties, getProperty, getPublicId, getSlotsUsed, getSpecialProperties, getSystemId, getSystemId, hasLoopingSubexpression, hasVariableBinding, implementsStaticTypeCheck, isSubtreeExpression, isUpdatingExpression, isVacuousExpression, iterate, iterateEvents, iterateSameFocusSubExpressions, markTailFunctionCalls, process, resetLocalStaticProperties, setContainer, setEvaluationMethod, setFiltered, setFlattened, setLocationId, staticTypeCheck, suppressValidation, typeError
addExternalFunctionCallToPathMap, checkArgumentCount, explain, getArguments, getDisplayName, getExpressionName, getFunctionName, getNumberOfArguments, hashCode, iterateSubExpressions, promote, replaceSubExpression, setArguments, setFunctionName, simplify, simplifyArguments, toString
clone, finalize, getClass, notify, notifyAll, wait, wait, wait
addContextDocumentArgument, addDocToPathMap, checkArguments, computeCardinality, computeSpecialProperties, copy, equals, getDetails, getErrorCodeForTypeErrors, getImplementationMethod, getItemType, getOperation, getRequiredType, makeSystemFunction, optimize, setDetails, useContextItemAsDefault
public int getIntrinsicDependencies()
getIntrinsicDependencies
in class Expression
public Expression typeCheck(ExpressionVisitor visitor, ExpressionVisitor.ContextItemType contextItemType) throws XPathException
FunctionCall
typeCheck
in class FunctionCall
visitor
- an expression visitorcontextItemType
- the static type of "." at the point where this expression is invoked.
The parameter is set to null if it is known statically that the context item will be undefined.
If the type of the context item is not known statically, the argument is set to
Type.ITEM_TYPE
XPathException
- if an error is discovered during this phase
(typically a type error)public Expression preEvaluate(ExpressionVisitor visitor) throws XPathException
preEvaluate
in class FunctionCall
visitor
- an expression visitorXPathException
- if evaluation failspublic Item evaluateItem(XPathContext c) throws XPathException
evaluateItem
in class Expression
c
- The context in which the expression is to be evaluatedXPathException
- if any dynamic error occurs evaluating the
expressionpublic boolean effectiveBooleanValue(XPathContext c) throws XPathException
This method is implemented for normalize-space() because it is quite often used in a boolean context to test whether a value exists and is non-white, and because testing for the presence of non-white characters is a lot more efficient than constructing the normalized string, especially because of early-exit.
effectiveBooleanValue
in class Expression
c
- The context in which the expression is to be evaluatedXPathException
- if any dynamic error occurs evaluating the expression