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java.lang.Objectnet.sf.saxon.expr.ComputedExpression
net.sf.saxon.expr.FunctionCall
net.sf.saxon.functions.SystemFunction
net.sf.saxon.functions.CollatingFunction
Abstract superclass for all functions that take an optional collation argument
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 | |
CollatingFunction()
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Method Summary | |
protected AtomicComparer |
getAtomicComparer(int arg,
XPathContext context)
Get a AtomicComparer that can be used to compare values |
protected java.util.Comparator |
getCollator(int arg,
XPathContext context,
boolean useDefault)
Get a collator suitable for comparing strings. |
Expression |
preEvaluate(StaticContext env)
preEvaluate: if all arguments are known statically, evaluate early |
Methods inherited from class net.sf.saxon.functions.SystemFunction |
addContextDocumentArgument, checkArguments, computeCardinality, computeSpecialProperties, 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 java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
public CollatingFunction()
Method Detail |
public Expression preEvaluate(StaticContext env) throws XPathException
preEvaluate
in class FunctionCall
XPathException
protected AtomicComparer getAtomicComparer(int arg, XPathContext context) throws XPathException
arg
- the position of the argument (starting at 0) containing the collation name.
If this argument was not supplied, the default collation is usedcontext
- The dynamic evaluation context.
XPathException
protected java.util.Comparator getCollator(int arg, XPathContext context, boolean useDefault) throws XPathException
arg
- The argument position (counting from zero) that holds the collation
URI if presentcontext
- The dynamic contextuseDefault
- true if, in the absence of a collation argument, the default
collation should be used; false if the codepoint collation should be used.
XPathException
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