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java.lang.Objectnet.sf.saxon.expr.ComputedExpression
net.sf.saxon.expr.ContextItemExpression
This class represents the expression "(dot)", which always returns the context item. This may be a AtomicValue or a Node.
Field Summary |
Fields inherited from class net.sf.saxon.expr.ComputedExpression |
lineNumber, NO_ARGUMENTS, staticProperties |
Constructor Summary | |
ContextItemExpression()
|
Method Summary | |
Expression |
analyze(StaticContext env)
Type-check the expression. |
int |
computeCardinality()
Get the static cardinality |
void |
display(int level,
NamePool pool)
Diagnostic print of expression structure |
boolean |
equals(Object other)
Is this expression the same as another expression? |
Item |
evaluateItem(XPathContext context)
Evaluate the expression |
int |
getIntrinsicDependencies()
Determine the intrinsic dependencies of an expression, that is, those which are not derived from the dependencies of its subexpressions. |
ItemType |
getItemType()
Determine the item type |
int |
hashCode()
get HashCode for comparing two expressions |
SequenceIterator |
iterate(XPathContext context)
Iterate over the value of the expression |
Methods inherited from class net.sf.saxon.expr.ComputedExpression |
computeDependencies, computeSpecialProperties, computeStaticProperties, dynamicError, effectiveBooleanValue, evaluateAsString, getCardinality, getDependencies, getLineNumber, getSpecialProperties, getSubExpressions, markTailFunctionCalls, promote, setLineNumber, simplify, typeError |
Methods inherited from class java.lang.Object |
clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
public ContextItemExpression()
Method Detail |
public Expression analyze(StaticContext env) throws XPathException
env
- the static context of the expression
XPathException
- if an error is discovered during this phase
(typically a type error)public ItemType getItemType()
public int computeCardinality()
computeCardinality
in class ComputedExpression
public boolean equals(Object other)
public int hashCode()
public int getIntrinsicDependencies()
ComputedExpression
getIntrinsicDependencies
in class ComputedExpression
public SequenceIterator iterate(XPathContext context) throws XPathException
iterate
in interface Expression
iterate
in class ComputedExpression
context
- supplies the context for evaluation
XPathException
- if any dynamic error occurs evaluating the
expressionpublic Item evaluateItem(XPathContext context) throws XPathException
evaluateItem
in interface Expression
evaluateItem
in class ComputedExpression
context
- The context in which the expression is to be evaluated
XPathException
- if any dynamic error occurs evaluating the
expressionpublic void display(int level, NamePool pool)
level
- indentation level for this expression
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