Package net.sf.saxon.functions
Class ResolveURI
java.lang.Object
net.sf.saxon.expr.Expression
net.sf.saxon.expr.FunctionCall
net.sf.saxon.functions.SystemFunction
net.sf.saxon.functions.ResolveURI
- All Implemented Interfaces:
Serializable
,SourceLocator
,LocationProvider
,SaxonLocator
,CallableExpression
,InstructionInfo
,Locator
This class supports the resolve-uri() functions in XPath 2.0
- See Also:
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Field Summary
FieldsFields 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.Expression
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
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptioncall
(SequenceIterator[] arguments, XPathContext context) Evaluate the expressionvoid
checkArguments
(ExpressionVisitor visitor) Method called during static type checkingcopy()
Copy an expression.boolean
Determine whether two expressions are equivalentstatic String
Replace spaces by %20evaluateItem
(XPathContext context) Evaluate the function at run-timeGet the static base URI of the expressionstatic URI
makeAbsolute
(String relativeURI, String base) Construct an absolute URI from a relative URI and a base URI.static String
tryToExpand
(String systemId) If a system ID can't be parsed as a URL, try to expand it as a relative URI using the current directory as the base URI.Methods inherited from class net.sf.saxon.functions.SystemFunction
addContextDocumentArgument, addDocToPathMap, computeCardinality, computeSpecialProperties, getDetails, getErrorCodeForTypeErrors, getImplementationMethod, getItemType, getOperation, getRequiredType, makeSystemFunction, optimize, setDetails, useContextItemAsDefault
Methods inherited from class net.sf.saxon.expr.FunctionCall
addExternalFunctionCallToPathMap, checkArgumentCount, explain, getArguments, getDisplayName, getExpressionName, getFunctionName, getNumberOfArguments, hashCode, iterateSubExpressions, preEvaluate, promote, replaceSubExpression, setArguments, setFunctionName, simplify, simplifyArguments, toString, typeCheck
Methods inherited from class net.sf.saxon.expr.Expression
addToPathMap, adoptChildExpression, checkForUpdatingSubexpressions, checkPermittedContents, computeDependencies, computeStaticProperties, doPromotion, dynamicError, effectiveBooleanValue, evaluateAsString, evaluatePendingUpdates, explain, getCardinality, getColumnNumber, getColumnNumber, getConstructType, getContainer, getDependencies, getEvaluationMethod, getExecutable, getHostLanguage, getIntegerBounds, getIntrinsicDependencies, 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
Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait
Methods inherited from interface net.sf.saxon.expr.CallableExpression
getArguments
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Field Details
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expressionBaseURI
String expressionBaseURI
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Constructor Details
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ResolveURI
public ResolveURI()
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Method Details
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checkArguments
Description copied from class:SystemFunction
Method called during static type checking- Overrides:
checkArguments
in classSystemFunction
- Parameters:
visitor
- the expression visitor- Throws:
XPathException
- if the arguments are incorrect
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getStaticBaseURI
Get the static base URI of the expression- Returns:
- the base URI from the static context
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copy
Copy an expression. This makes a deep copy.- Overrides:
copy
in classSystemFunction
- Returns:
- the copy of the original expression
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equals
Determine whether two expressions are equivalent- Overrides:
equals
in classSystemFunction
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evaluateItem
Evaluate the function at run-time- Overrides:
evaluateItem
in classExpression
- 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
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call
public SequenceIterator call(SequenceIterator[] arguments, XPathContext context) throws XPathException Evaluate the expression- Specified by:
call
in interfaceCallableExpression
- Parameters:
arguments
- the values of the arguments, supplied as SequenceIteratorscontext
- the dynamic evaluation context- Returns:
- the result of the evaluation, in the form of a SequenceIterator
- Throws:
XPathException
- if a dynamic error occurs during the evaluation of the expression
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tryToExpand
If a system ID can't be parsed as a URL, try to expand it as a relative URI using the current directory as the base URI.- Parameters:
systemId
- the supplied systemId. Null is treated as equivalent to ""- Returns:
- the systemId itself if it is a valid URL; otherwise the result of resolving the systemId as a relative file name in the current working directory; or if the current working directory is not available (e.g. in an applet) the supplied systemId unchanged (except that null is treated as "").
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makeAbsolute
Construct an absolute URI from a relative URI and a base URI. The method uses the resolve method of the java.net.URI class, except where the base URI uses the (non-standard) "jar:" scheme, in which case the method used isnew URL(baseURL, relativeURL)
.Spaces in either URI are converted to %20
If no base URI is available, and the relative URI is not an absolute URI, then the current directory is used as a base URI.
- Parameters:
relativeURI
- the relative URI. Null is permitted provided that the base URI is an absolute URIbase
- the base URI. Null is permitted provided that relativeURI is an absolute URI- Returns:
- the absolutized URI
- Throws:
URISyntaxException
- if either of the strings is not a valid URI or if the resolution fails
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escapeSpaces
Replace spaces by %20- Parameters:
s
- the input string- Returns:
- the input string with each space replaced by %20
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