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java.lang.Object | +--net.sf.saxon.expr.ComputedExpression | +--net.sf.saxon.expr.SuppliedParameterReference
Supplied parameter reference: this is an internal expression used to refer to the value of the n'th parameter supplied on a template call (apply-templates). It is used within a type-checking expression designed to check the consistency of the supplied value with the required type. This type checking is all done at run-time, because the binding of apply-templates to actual template rules is entirely dynamic.
Field Summary |
Fields inherited from class net.sf.saxon.expr.ComputedExpression |
lineNumber, NO_ARGUMENTS, staticProperties |
Constructor Summary | |
SuppliedParameterReference(int slot)
Constructor |
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(java.lang.Object other)
Test if this expression is the same as another expression. |
Item |
evaluateItem(XPathContext c)
Evaluate an expression as a single item. |
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 data type of the expression, if possible. |
SequenceIterator |
iterate(XPathContext c)
Get the value of this variable in a given context. |
Expression |
simplify()
Simplify 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, typeError |
Methods inherited from class java.lang.Object |
clone, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
public SuppliedParameterReference(int slot)
slot
- identifies this parameterMethod Detail |
public Expression simplify()
simplify
in interface Expression
simplify
in class ComputedExpression
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(java.lang.Object other)
equals
in class java.lang.Object
public int getIntrinsicDependencies()
ComputedExpression
getIntrinsicDependencies
in class ComputedExpression
public SequenceIterator iterate(XPathContext c) throws XPathException
iterate
in interface Expression
iterate
in class ComputedExpression
c
- the XPathContext which contains the relevant variable bindings
XPathException
- if the variable is undefinedpublic Item evaluateItem(XPathContext c) throws XPathException
ComputedExpression
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 void display(int level, NamePool pool)
level
- indentation level for this expression
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