com.bigdata.rdf.internal.constraints

Class CoalesceBOp

java.lang.Object

com.bigdata.bop.CoreBaseBOp

com.bigdata.bop.BOpBase

com.bigdata.rdf.internal.constraints.IVValueExpression<IV>

com.bigdata.rdf.internal.constraints.CoalesceBOp

All Implemented Interfaces:

BOp, IValueExpression<IV>, IPassesMaterialization, IPropertySet, Serializable, Cloneable

public class CoalesceBOp
extends IVValueExpression<IV>
implements IPassesMaterialization

Coalesce BOp The COALESCE function form returns the RDF term value of the first expression that evaluates without error. In SPARQL, evaluating an unbound variable raises an error.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class com.bigdata.rdf.internal.constraints.IVValueExpression

IVValueExpression.Annotations

Field Summary

Fields inherited from class com.bigdata.bop.CoreBaseBOp

DEFAULT_INITIAL_CAPACITY

Fields inherited from interface com.bigdata.bop.BOp

NOANNS, NOARGS

Constructor Summary

Constructors

Constructor and Description
CoalesceBOp(BOp[] args, Map<String,Object> anns) Required shallow copy constructor.
CoalesceBOp(CoalesceBOp op) Constructor required for com.bigdata.bop.BOpUtility#deepCopy(FilterNode).
CoalesceBOp(GlobalAnnotations globals, IValueExpression<? extends IV>... expressions)

Method Summary

Methods

Modifier and Type	Method and Description
IV	get(IBindingSet bs) Return the as bound value of the variable, constant, or expression.

Methods inherited from class com.bigdata.rdf.internal.constraints.IVValueExpression

anns, areGlobalsRequired, asIV, asIV, asLiteral, asValue, get, getAndCheckBound, getAndCheckLiteral, getAndCheckLiteralValue, getLexiconConfiguration, getNamespace, getTimestamp, getValueFactory, literalLabel

Methods inherited from class com.bigdata.bop.BOpBase

__replaceArg, _clearProperty, _set, _setProperty, annotations, annotationsCopy, annotationsEqual, annotationsRef, argIterator, args, argsCopy, arity, clearAnnotations, clearProperty, deepCopy, deepCopy, getProperty, setArg, setProperty, setUnboundProperty, toArray, toArray

Methods inherited from class com.bigdata.bop.CoreBaseBOp

annotationsEqual, annotationsToString, annotationsToString, annotationValueToString, checkArgs, clone, equals, getEvaluationContext, getId, getProperty, getRequiredProperty, hashCode, indent, isController, mutation, shortenName, toShortString, toString, toString

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface com.bigdata.bop.IValueExpression

toString

Methods inherited from interface com.bigdata.bop.BOp

annotations, argIterator, args, arity, clone, getEvaluationContext, getId, getProperty, getRequiredProperty, isController, setProperty, toArray, toArray, toShortString, toString

Methods inherited from interface cutthecrap.utils.striterators.IPropertySet

getProperty

Constructor Detail

CoalesceBOp

public CoalesceBOp(GlobalAnnotations globals,
           IValueExpression<? extends IV>... expressions)

CoalesceBOp

public CoalesceBOp(BOp[] args,
           Map<String,Object> anns)

Required shallow copy constructor.

CoalesceBOp

public CoalesceBOp(CoalesceBOp op)

Constructor required for com.bigdata.bop.BOpUtility#deepCopy(FilterNode).

Method Detail

get

public IV get(IBindingSet bs)

Description copied from interface: IValueExpression

Return the as bound value of the variable, constant, or expression. The as bound value of an IConstant is the contant's value. The as bound value of an IVariable is the bound value in the given IBindingSet -or- null if the variable is not bound in the IBindingSet.

Specified by:

get in interface IValueExpression<IV>

Parameters:

bs - The binding set.

Returns:

The as bound value of the constant, variable, or expression.