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java.lang.Object | +--net.sf.saxon.expr.ComputedExpression | +--net.sf.saxon.expr.FunctionCall | +--net.sf.saxon.functions.SystemFunction | +--net.sf.saxon.functions.Matches
This class implements the matches() function for regular expression matching
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 | |
Matches()
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Method Summary | |
Item |
evaluateItem(XPathContext c)
Evaluate the matches() function to give a Boolean value. |
static int |
setFlags(java.lang.String inFlags)
Set the Java flags from the supplied XPath flags. |
Expression |
simplify(StaticContext env)
Simplify and validate. |
protected static java.util.regex.Pattern |
tryToCompile(Expression[] args,
int patternArg,
int flagsArg)
Try to precompile the arguments to the function. |
Methods inherited from class net.sf.saxon.functions.SystemFunction |
addContextDocumentArgument, checkArguments, computeCardinality, display, getDetails, getItemType, getRequiredType, main, makeSystemFunction, setDetails, useContextItemAsDefault |
Methods inherited from class net.sf.saxon.expr.FunctionCall |
analyze, checkArgumentCount, getDisplayName, getFunctionNameCode, getNumberOfArguments, iterateSubExpressions, preEvaluate, promote, setArguments, setFunctionNameCode, simplifyArguments |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
public Matches()
Method Detail |
public Expression simplify(StaticContext env) throws XPathException
simplify
in interface Expression
simplify
in class FunctionCall
StaticError
- if any error is found (e.g. invalid regular expression)
XPathException
- if an error is discovered during expression
rewritingpublic static int setFlags(java.lang.String inFlags) throws StaticError
inFlags
- the flags as a string, e.g. "im"
StaticError
- if the supplied value is invalidprotected static java.util.regex.Pattern tryToCompile(Expression[] args, int patternArg, int flagsArg) throws StaticError
args
- the supplied arguments to the function, as an arraypatternArg
- the position of the argument containing the regular expressionflagsArg
- the position of the argument containing the flags
StaticError
- if any failure occurs, in particular, if the regular
expression is invalidpublic Item evaluateItem(XPathContext c) throws XPathException
evaluateItem
in interface Expression
evaluateItem
in class ComputedExpression
c
- The dynamic evaluation context
XPathException
- on an error
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