java.io.Serializable
, javax.xml.transform.SourceLocator
, Container
, Expression
, InstructionInfoProvider
public final class NumericPromoter extends UnaryExpression
locationId, staticProperties
EVALUATE_METHOD, ITERATE_METHOD, PROCESS_METHOD
operand
Constructor | Description |
---|---|
NumericPromoter(Expression sequence,
int requiredType) |
Constructor
|
Modifier and Type | Method | Description |
---|---|---|
protected java.lang.String |
displayOperator(Configuration config) |
Give a string representation of the operator for use in diagnostics
|
boolean |
equals(java.lang.Object other) |
Is this expression the same as another expression?
|
Item |
evaluateItem(XPathContext context) |
Evaluate as an Item.
|
ItemType |
getItemType(TypeHierarchy th) |
Determine the data type of the items returned by the expression, if possible
|
SequenceIterator |
iterate(XPathContext context) |
Iterate over the sequence of values
|
Expression |
optimize(Optimizer opt,
StaticContext env,
ItemType contextItemType) |
Optimize the expression
|
Expression |
simplify(StaticContext env) |
Simplify an expression
|
Expression |
typeCheck(StaticContext env,
ItemType contextItemType) |
Type-check the expression
|
adoptChildExpression, checkPermittedContents, computeDependencies, computeStaticProperties, doPromotion, dynamicError, effectiveBooleanValue, evaluateAsString, getCardinality, getColumnNumber, getConstructType, getDependencies, getExecutable, getHostLanguage, getImplementationMethod, getInstructionInfo, getIntrinsicDependencies, getLineNumber, getLocationId, getLocationProvider, getParentExpression, getPublicId, getSlotsUsed, getSpecialProperties, getSystemId, hasBadParentPointer, markTailFunctionCalls, process, resetStaticProperties, setLocationId, setParentExpression, setParentExpression, suppressValidation, typeError
clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait
computeCardinality, computeSpecialProperties, display, getBaseExpression, hashCode, iterateSubExpressions, promote, replaceSubExpression
public NumericPromoter(Expression sequence, int requiredType)
sequence
- this must be a sequence of atomic values. This is not checked; a ClassCastException
will occur if the precondition is not satisfied.requiredType
- the item type to which all items in the sequence should be converted,
using the rules for "cast as".public Expression simplify(StaticContext env) throws XPathException
simplify
in interface Expression
simplify
in class UnaryExpression
env
- the static contextXPathException
- if an error is discovered during expression
rewritingpublic Expression typeCheck(StaticContext env, ItemType contextItemType) throws XPathException
typeCheck
in interface Expression
typeCheck
in class UnaryExpression
env
- the static context of the expressioncontextItemType
- the static type of "." at the point where this expression is invoked.
The parameter is set to null if it is known statically that the context item will be undefined.
If the type of the context item is not known statically, the argument is set to
Type.ITEM_TYPE
StaticError
- if an error is discovered during this phase
(typically a type error)XPathException
public Expression optimize(Optimizer opt, StaticContext env, ItemType contextItemType) throws XPathException
optimize
in interface Expression
optimize
in class UnaryExpression
opt
- the optimizer in use. This provides access to supporting functions; it also allows
different optimization strategies to be used in different circumstances.env
- the static context of the expressioncontextItemType
- the static type of "." at the point where this expression is invoked.
The parameter is set to null if it is known statically that the context item will be undefined.
If the type of the context item is not known statically, the argument is set to
Type.ITEM_TYPE
net.sf.saxon.trans.StaticError
- if an error is discovered during this phase
(typically a type error)XPathException
public SequenceIterator iterate(XPathContext context) throws XPathException
iterate
in interface Expression
iterate
in class ComputedExpression
context
- supplies the context for evaluationXPathException
- 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 evaluatedXPathException
- if any dynamic error occurs evaluating the
expressionpublic ItemType getItemType(TypeHierarchy th)
getItemType
in interface Expression
getItemType
in class UnaryExpression
th
- public boolean equals(java.lang.Object other)
equals
in class UnaryExpression
protected java.lang.String displayOperator(Configuration config)
displayOperator
in class UnaryExpression
config
-