public class NegateExpression extends UnaryExpression
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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NegateExpression(Expression base)
Create a NegateExpression
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Modifier and Type | Method and Description |
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Expression |
copy(RebindingMap rebindings)
Copy an expression.
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protected java.lang.String |
displayOperator(Configuration config)
Give a string representation of the operator for use in diagnostics
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NumericValue |
evaluateItem(XPathContext context)
Evaluate the expression.
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void |
export(ExpressionPresenter out)
Diagnostic print of expression structure.
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java.lang.String |
getExpressionName()
Get a name identifying the kind of expression, in terms meaningful to a user.
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int |
getImplementationMethod()
An implementation of Expression must provide at least one of the methods evaluateItem(), iterate(), or process().
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ItemType |
getItemType()
Determine the data type of the expression, if this is known statically
/*@NotNull
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protected OperandRole |
getOperandRole()
Get the usage (in terms of streamability analysis) of the single operand
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boolean |
isBackwardsCompatible()
Ask whether the expression is to be evaluated in XPath 1.0 compatibility mode
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void |
setBackwardsCompatible(boolean compatible)
Set whether the expression is to be evaluated in XPath 1.0 compatibility mode
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Expression |
typeCheck(ExpressionVisitor visitor,
ContextItemStaticInfo contextInfo)
Type-check the expression.
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computeCardinality, computeHashCode, computeSpecialProperties, equals, getBaseExpression, getOperand, operands, optimize, setBaseExpression, toShortString, toString
addToPathMap, adoptChildExpression, allowExtractingCommonSubexpressions, checkedOperands, checkForUpdatingSubexpressions, checkPermittedContents, computeDependencies, computeStaticProperties, dynamicError, effectiveBooleanValue, evaluateAsString, evaluatePendingUpdates, explain, getCardinality, getConfiguration, getConstructType, getCost, getDependencies, getEvaluationMethod, getExtraProperty, getIntegerBounds, getInterpretedExpression, getIntrinsicDependencies, getLocalRetainedStaticContext, getLocation, getNetCost, getObjectName, getPackageData, getParentExpression, getProperties, getProperty, getRetainedStaticContext, getScopingExpression, getSlotsUsed, getSpecialProperties, getStaticBaseURI, getStaticBaseURIString, getStaticType, getStaticUType, getStreamerName, hasCompatibleStaticContext, hashCode, hasVariableBinding, identityHashCode, implementsStaticTypeCheck, isCallOn, isCallOnSystemFunction, isIdentical, isInstruction, isLiftable, isMultiThreaded, isSameExpression, isStaticPropertiesKnown, isSubtreeExpression, isUpdatingExpression, isVacuousExpression, iterate, markTailFunctionCalls, operandList, operandSparseList, optimizeChildren, process, resetLocalStaticProperties, restoreParentPointers, setEvaluationMethod, setExtraProperty, setFiltered, setFlattened, setLocation, setParentExpression, setRetainedStaticContext, setRetainedStaticContextLocally, setRetainedStaticContextThoroughly, setStaticProperty, simplify, simplifyChildren, staticTypeCheck, suppressValidation, toPattern, typeCheckChildren, typeError, unordered, verifyParentPointers, verifyParentPointers
public NegateExpression(Expression base)
base
- the expression that computes the value whose sign is to be reversedpublic void setBackwardsCompatible(boolean compatible)
compatible
- true if XPath 1.0 compatibility mode is enabledpublic boolean isBackwardsCompatible()
protected OperandRole getOperandRole()
UnaryExpression
getOperandRole
in class UnaryExpression
public Expression typeCheck(ExpressionVisitor visitor, ContextItemStaticInfo contextInfo) throws XPathException
UnaryExpression
typeCheck
in class UnaryExpression
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 ItemType getItemType()
getItemType
in class UnaryExpression
public int getImplementationMethod()
getImplementationMethod
in class Expression
Expression.ITERATE_METHOD
or Expression.EVALUATE_METHOD
or
Expression.PROCESS_METHOD
public NumericValue 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
expressionpublic Expression copy(RebindingMap rebindings)
copy
in class Expression
rebindings
- protected java.lang.String displayOperator(Configuration config)
UnaryExpression
displayOperator
in class UnaryExpression
config
- the Saxon configurationpublic java.lang.String getExpressionName()
getExpressionName
in class Expression
public void export(ExpressionPresenter out) throws XPathException
UnaryExpression
export
in interface ExportAgent
export
in class UnaryExpression
out
- the expression presenter used to display the structureXPathException
- if the export fails, for example if an expression is found that won't work
in the target environment.Copyright (c) 2004-2018 Saxonica Limited. All rights reserved.