|
||||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |
java.lang.Object | +--net.sf.saxon.expr.ComputedExpression | +--net.sf.saxon.expr.PositionRange
PositionRange: a boolean expression that tests whether the position() is within a certain range. This expression can occur in any context but it is optimized when it appears as a predicate (see FilterIterator)
Field Summary |
Fields inherited from class net.sf.saxon.expr.ComputedExpression |
lineNumber, NO_ARGUMENTS, staticProperties |
Constructor Summary | |
PositionRange(int min,
int max)
Create a position range |
Method Summary | |
Expression |
analyze(StaticContext env)
Type-check the expression |
int |
computeCardinality()
Determine the static cardinality |
void |
display(int level,
NamePool pool)
Diagnostic print of expression structure |
Item |
evaluateItem(XPathContext c)
Evaluate the expression |
int |
getIntrinsicDependencies()
Get the dependencies |
ItemType |
getItemType()
Determine the data type of the expression |
int |
getMaxPosition()
Get the maximum position |
int |
getMinPosition()
Get the minimum position |
Expression |
simplify()
Simplify an expression |
Methods inherited from class net.sf.saxon.expr.ComputedExpression |
computeDependencies, computeSpecialProperties, computeStaticProperties, dynamicError, effectiveBooleanValue, evaluateAsString, getCardinality, getDependencies, getLineNumber, getSourceLocator, getSpecialProperties, getSubExpressions, iterate, markTailFunctionCalls, promote, setLineNumber, typeError |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
public PositionRange(int min, int max)
Method Detail |
public Expression simplify() throws XPathException.Static
simplify
in interface Expression
simplify
in class ComputedExpression
XPathException.Static
public Expression analyze(StaticContext env)
env
- the static context of the expression
public Item evaluateItem(XPathContext c) throws XPathException
evaluateItem
in interface Expression
evaluateItem
in class ComputedExpression
c
- The context in which the expression is to be evaluated
XPathException
- if any dynamic error occurs evaluating the
expressionpublic ItemType getItemType()
public int computeCardinality()
computeCardinality
in class ComputedExpression
public int getIntrinsicDependencies()
getIntrinsicDependencies
in class ComputedExpression
public int getMinPosition()
public int getMaxPosition()
public void display(int level, NamePool pool)
level
- indentation level for this expression
|
||||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |