com.saxonica.importer
Class SelectionParser

java.lang.Object
  |
  +--net.sf.saxon.expr.ExpressionParser
        |
        +--com.saxonica.importer.SelectionParser

public class SelectionParser

extends ExpressionParser

This class parses the two XPath subsets defined in XML Schema for handling the "selector" and "field" attributes of the , , and elements.

Nested Class Summary

 

Nested classes inherited from class net.sf.saxon.expr.ExpressionParser

ExpressionParser.ForClause

 

Field Summary

 

Fields inherited from class net.sf.saxon.expr.ExpressionParser

env, numberOfRangeVariables, rangeVariables, scanOnly, t

 

Constructor Summary

SelectionParser()

 

Method Summary
Selection	parseSelector(java.lang.String expression, StaticContext env, boolean isField)           Parse a string representing the restricted XPath expression allowed in an XML Schema selector or field attribute
protected  Expression	parseStepExpression()           Override the general XPath parsing of a StepExpression to support the simpler kind of Step used in XML Schema selectors

 

Methods inherited from class net.sf.saxon.expr.ExpressionParser

currentTokenDisplay, declareRangeVariable, expect, getExecutable, getLanguage, getRangeVariableStack, getTokenizer, grumble, isKeyword, makeLocalNameTest, makeLocator, makeNameCode, makeNamespaceTest, makeNameTest, makeStringLiteral, nextToken, parse, parseConstructor, parseExpression, parseExprSingle, parseForExpression, parseMappingExpression, parseNodeTest, parsePattern, parseRelativePath, parseSequenceType, parseSequenceType, parseTypeswitchExpression, parseValidateExpression, setLocation, setLocation, setRangeVariableStack, setScanOnly, undeclareRangeVariable, warning

 

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

 

Constructor Detail

SelectionParser

public SelectionParser()

parseSelector

public Selection parseSelector(java.lang.String expression,
                               StaticContext env,
                               boolean isField)
                        throws XPathException

Parse a string representing the restricted XPath expression allowed in an XML Schema selector or field attribute

Parameters:

expression - the expression expressed as a String

env - the static context for the expression

isField - true if the attribute is a "field" attribute, false if it is a "selector" attribute

Returns:

an Expression object representing the result of parsing

Throws:

XPathException - if the expression contains a syntax error

parseStepExpression

protected Expression parseStepExpression()
                                  throws XPathException.Static

Override the general XPath parsing of a StepExpression to support the simpler kind of Step used in XML Schema selectors

Overrides:

parseStepExpression in class ExpressionParser

Returns:

an Expression, which will always be either an AxisExpression or a ContextItemExpression

Throws:

XPathException.Static