public class ArithmeticExpression extends BinaryExpression
Modifier and Type | Field and Description |
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protected Calculator |
calculator |
operator
EFFECTIVE_BOOLEAN_VALUE, EVALUATE_METHOD, ITEM_FEED_METHOD, ITERATE_METHOD, MAX_SEQUENCE_LENGTH, MAX_STRING_LENGTH, PROCESS_METHOD, staticProperties, UNBOUNDED_LOWER, UNBOUNDED_UPPER, UPDATE_METHOD, WATCH_METHOD
Constructor and Description |
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ArithmeticExpression(Expression p0,
int operator,
Expression p1)
Create an arithmetic expression
|
Modifier and Type | Method and Description |
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static AtomicValue |
compute(AtomicValue value0,
int operator,
AtomicValue value1,
XPathContext context)
Static method to apply arithmetic to two values
|
int |
computeSpecialProperties()
Determine the special properties of this expression
|
Expression |
copy(RebindingMap rebindings)
Copy an expression.
|
AtomicValue |
evaluateItem(XPathContext context)
Evaluate the expression.
|
protected void |
explainExtraAttributes(ExpressionPresenter out)
Add subclass-specific attributes to the expression tree explanation.
|
Calculator |
getCalculator()
Get the calculator allocated to evaluate this expression
|
java.lang.String |
getExpressionName()
Get a name identifying the kind of expression, in terms meaningful to a user.
|
IntegerValue[] |
getIntegerBounds()
For an expression that returns an integer or a sequence of integers, get
a lower and upper bound on the values of the integers that may be returned, from
static analysis.
|
PlainType |
getItemType()
Determine the data type of the expression, insofar as this is known statically
|
UType |
getStaticUType(UType contextItemType)
Get the static type of the expression as a UType, following precisely the type
inference rules defined in the XSLT 3.0 specification.
|
static int |
mapOpCode(int op)
Map operator codes from those in the Token class to those in the Calculator class
|
void |
resetLocalStaticProperties()
Reset the static properties of the expression to -1, so that they have to be recomputed
next time they are used.
|
void |
setCalculator(Calculator calculator)
Set the calculator allocated to evaluate this expression
|
protected java.lang.String |
tag()
Get the element name used to identify this expression in exported expression format
|
Expression |
typeCheck(ExpressionVisitor visitor,
ContextItemStaticInfo contextInfo)
Type-check the expression statically.
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computeCardinality, computeHashCode, displayOperator, equals, export, getImplementationMethod, getLhs, getLhsExpression, getOperandRole, getOperator, getRhs, getRhsExpression, isAssociative, isCommutative, isInverse, operands, optimize, setFlattened, setLhsExpression, setRhsExpression, toShortString, toString
addToPathMap, adoptChildExpression, allowExtractingCommonSubexpressions, checkedOperands, checkForUpdatingSubexpressions, checkPermittedContents, computeDependencies, computeStaticProperties, dynamicError, effectiveBooleanValue, evaluateAsString, evaluatePendingUpdates, explain, getCardinality, getConfiguration, getConstructType, getCost, getDependencies, getEvaluationMethod, getExtraProperty, getInterpretedExpression, getIntrinsicDependencies, getLocalRetainedStaticContext, getLocation, getNetCost, getObjectName, getPackageData, getParentExpression, getProperties, getProperty, getRetainedStaticContext, getScopingExpression, getSlotsUsed, getSpecialProperties, getStaticBaseURI, getStaticBaseURIString, getStaticType, getStreamerName, hasCompatibleStaticContext, hashCode, hasVariableBinding, identityHashCode, implementsStaticTypeCheck, isCallOn, isCallOnSystemFunction, isIdentical, isInstruction, isLiftable, isMultiThreaded, isSameExpression, isStaticPropertiesKnown, isSubtreeExpression, isUpdatingExpression, isVacuousExpression, iterate, markTailFunctionCalls, operandList, operandSparseList, optimizeChildren, process, restoreParentPointers, setEvaluationMethod, setExtraProperty, setFiltered, setLocation, setParentExpression, setRetainedStaticContext, setRetainedStaticContextLocally, setRetainedStaticContextThoroughly, setStaticProperty, simplify, simplifyChildren, staticTypeCheck, suppressValidation, toPattern, typeCheckChildren, typeError, unordered, verifyParentPointers, verifyParentPointers
protected Calculator calculator
public ArithmeticExpression(Expression p0, int operator, Expression p1)
p0
- the first operandoperator
- the operator, for example Token.PLUS
p1
- the second operandpublic java.lang.String getExpressionName()
getExpressionName
in class Expression
public int computeSpecialProperties()
computeSpecialProperties
in class BinaryExpression
StaticProperty.NON_CREATIVE
. This is overridden
for some subclasses.public void setCalculator(Calculator calculator)
calculator
- the calculator to be usedpublic Calculator getCalculator()
public Expression typeCheck(ExpressionVisitor visitor, ContextItemStaticInfo contextInfo) throws XPathException
typeCheck
in class BinaryExpression
visitor
- an expression visitorcontextInfo
- Information available statically about the context item: whether it is (possibly)
absent; its static type; its streaming posture.XPathException
- if an error is discovered during this phase
(typically a type error)public IntegerValue[] getIntegerBounds()
getIntegerBounds
in class Expression
public Expression copy(RebindingMap rebindings)
copy
in class Expression
rebindings
- 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
- if a dynamic error occurs during evaluationpublic 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 PlainType getItemType()
getItemType
in class Expression
public UType getStaticUType(UType contextItemType)
getStaticUType
in class Expression
contextItemType
- public void resetLocalStaticProperties()
resetLocalStaticProperties
in class Expression
public AtomicValue evaluateItem(XPathContext context) throws XPathException
evaluateItem
in class Expression
context
- The context in which the expression is to be evaluatedXPathException
- if any dynamic error occurs evaluating the
expressionprotected java.lang.String tag()
BinaryExpression
tag
in class BinaryExpression
protected void explainExtraAttributes(ExpressionPresenter out)
BinaryExpression
explainExtraAttributes
in class BinaryExpression
out
- the output destination for the displayed expression treeCopyright (c) 2004-2018 Saxonica Limited. All rights reserved.