public class ConsumingOperand 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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ConsumingOperand(Expression subExpression)
Constructor
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Modifier and Type | Method and Description |
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int |
computeCardinality()
Get the static cardinality
|
Expression |
copy(RebindingMap rebindings)
Copy an expression.
|
Sequence |
evaluate(XPathContext c)
Get the value of this expression in a given context.
|
Item |
evaluateItem(XPathContext context)
Evaluate an expression as a single item.
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void |
export(ExpressionPresenter destination)
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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int |
getIntrinsicDependencies()
Determine the intrinsic dependencies of an expression, that is, those which are not derived
from the dependencies of its subexpressions.
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ItemType |
getItemType()
Determine the data type of the expression, if possible.
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protected OperandRole |
getOperandRole()
Get the usage (in terms of streamability analysis) of the single operand
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SequenceIterator |
iterate(XPathContext context)
Get the value of this expression in a given context.
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java.lang.String |
toShortString()
Produce a short string identifying the expression for use in error messages
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java.lang.String |
toString()
The toString() method for an expression attempts to give a representation of the expression
in an XPath-like form, but there is no guarantee that the syntax will actually be true XPath.
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computeHashCode, computeSpecialProperties, displayOperator, equals, getBaseExpression, getOperand, operands, optimize, setBaseExpression, typeCheck
addToPathMap, adoptChildExpression, allowExtractingCommonSubexpressions, checkedOperands, checkForUpdatingSubexpressions, checkPermittedContents, computeDependencies, computeStaticProperties, dynamicError, effectiveBooleanValue, evaluateAsString, evaluatePendingUpdates, explain, getCardinality, getConfiguration, getConstructType, getCost, getDependencies, getEvaluationMethod, getExtraProperty, getIntegerBounds, getInterpretedExpression, 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, 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 ConsumingOperand(Expression subExpression)
subExpression
- identifies the expression for which this is a proxy.protected OperandRole getOperandRole()
getOperandRole
in class UnaryExpression
public ItemType getItemType()
getItemType
in class UnaryExpression
public int getIntrinsicDependencies()
getIntrinsicDependencies
in class Expression
public int computeCardinality()
computeCardinality
in class UnaryExpression
public Expression copy(RebindingMap rebindings)
copy
in class Expression
rebindings
- public int getImplementationMethod()
getImplementationMethod
in class Expression
Expression.ITERATE_METHOD
or Expression.EVALUATE_METHOD
or
Expression.PROCESS_METHOD
public Sequence evaluate(XPathContext c) throws XPathException
c
- the XPathContext which contains the relevant variable bindingsXPathException
- if the variable is undefinedpublic SequenceIterator iterate(XPathContext context) throws XPathException
iterate
in class Expression
context
- the XPathContext which contains the relevant variable bindingsXPathException
- if the variable is undefinedpublic Item 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 java.lang.String getExpressionName()
getExpressionName
in class Expression
public void export(ExpressionPresenter destination) throws XPathException
export
in interface ExportAgent
export
in class UnaryExpression
destination
- 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.public java.lang.String toString()
toString
in class UnaryExpression
public java.lang.String toShortString()
Expression
toShortString
in class UnaryExpression
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