java.io.Serializable
, javax.xml.transform.SourceLocator
, LocationProvider
, SaxonLocator
, EvaluableItem
, SequenceIterable
, InstructionInfo
, org.xml.sax.Locator
public class ArithmeticExpression extends BinaryExpression
ArithmeticExpression10
operand0, operand1, operator
EVALUATE_METHOD, ITERATE_METHOD, locationId, PROCESS_METHOD, staticProperties
Constructor | Description |
---|---|
ArithmeticExpression(Expression p0,
int operator,
Expression p1) |
Create an arithmetic expression
|
Modifier and Type | Method | Description |
---|---|---|
static AtomicValue |
compute(AtomicValue value0,
int operator,
AtomicValue value1,
XPathContext context) |
Static method to apply arithmetic to two values
|
Expression |
copy() |
Copy an expression.
|
Item |
evaluateItem(XPathContext context) |
Evaluate the expression.
|
Calculator |
getCalculator() |
Get the calculator allocated to evaluate this expression
|
ItemType |
getItemType(TypeHierarchy th) |
Determine the data type of the expression, insofar as this is known statically
|
static int |
mapOpCode(int op) |
Map operator codes from those in the Token class to those in the Calculator class
|
Expression |
simplify(ExpressionVisitor visitor) |
Simplify an expression
|
Expression |
typeCheck(ExpressionVisitor visitor,
ItemType contextItemType) |
Type-check the expression statically.
|
computeCardinality, computeSpecialProperties, displayOperator, equals, explain, getOperands, getOperator, hashCode, isAssociative, isCommutative, isInverse, iterateSubExpressions, optimize, promote, replaceSubExpression, setFlattened, toString
addToPathMap, adoptChildExpression, checkForUpdatingSubexpressions, checkPermittedContents, computeDependencies, computeStaticProperties, display, doPromotion, dynamicError, effectiveBooleanValue, evaluateAsString, evaluatePendingUpdates, explain, findParentOf, getCardinality, getColumnNumber, getColumnNumber, getConstructType, getContainer, getDependencies, getExecutable, getHostLanguage, getImplementationMethod, getIntrinsicDependencies, getLineNumber, getLineNumber, getLocationId, getLocationProvider, getObjectName, getProperties, getProperty, getPublicId, getSlotsUsed, getSpecialProperties, getSystemId, getSystemId, hasLoopingSubexpression, implementsStaticTypeCheck, isUpdatingExpression, iterate, iterateEvents, markTailFunctionCalls, process, resetLocalStaticProperties, setContainer, setFiltered, setLocationId, staticTypeCheck, suppressValidation, typeError
public ArithmeticExpression(Expression p0, int operator, Expression p1)
p0
- the first operandoperator
- the operator, for example Token.PLUS
p1
- the second operandpublic Expression simplify(ExpressionVisitor visitor) throws XPathException
BinaryExpression
simplify
in class BinaryExpression
visitor
- an expression visitorXPathException
- if an error is discovered during expression
rewritingpublic Calculator getCalculator()
public Expression typeCheck(ExpressionVisitor visitor, ItemType contextItemType) throws XPathException
typeCheck
in class BinaryExpression
visitor
- an expression visitorcontextItemType
- 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
XPathException
- if an error is discovered during this phase
(typically a type error)public Expression copy()
copy
in class Expression
public static AtomicValue compute(AtomicValue value0, int operator, AtomicValue value1, XPathContext context) throws XPathException
value0
- the first valueoperator
- the operator as denoted in the Calculator class, for example Calculator.PLUS
value1
- the second valuecontext
- the XPath dynamic evaluation contextXPathException
public static int mapOpCode(int op)
op
- an operator denoted by a constant in the Token
class, for example Token.PLUS
Calculator
class, for example
Calculator.PLUS
public ItemType getItemType(TypeHierarchy th)
getItemType
in class Expression
th
- the type hierarchy cachepublic Item evaluateItem(XPathContext context) throws XPathException
evaluateItem
in interface EvaluableItem
evaluateItem
in class Expression
context
- The context in which the expression is to be evaluatedXPathException
- if any dynamic error occurs evaluating the
expression