net.sf.saxon.pattern
Class PatternMaker
java.lang.Object
net.sf.saxon.pattern.PatternMaker
public class PatternMaker
- extends Object
This is a singleton class used to convert an expression to an equivalent pattern.
This version of the class is used to generate conventional XSLT match patterns;
there is another version used to generate patterns suitable for streamed evaluation
in Saxon-EE.
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
PatternMaker
public PatternMaker()
fromExpression
public static Pattern fromExpression(Expression expression,
Configuration config,
boolean is30)
throws XPathException
- Static factory method to make a pattern by converting an expression. The supplied
expression is the equivalent expression to the pattern, in the sense that it takes
the same syntactic form.
Note that this method does NOT check all the rules for XSLT patterns; it deliberately allows
a (slightly) wider class of expressions to be converted than XSLT allows.
The expression root() at the start of the expression has a special meaning: it refers to
the root of the subtree in which the pattern must match, which can be supplied at run-time
during pattern matching. This is used for patterns that represent streamable path expressions.
- Parameters:
expression
- the expression to be convertedconfig
- the Saxon configurationis30
- set to true if XSLT 3.0 syntax is to be accepted
- Returns:
- the compiled pattern
- Throws:
XPathException
- if the expression cannot be converted
getAxisForPathStep
public static byte getAxisForPathStep(Expression step)
throws XPathException
- Throws:
XPathException
Copyright (c) 2004-2011 Saxonica Limited. All rights reserved.