com.bigdata.rdf.sparql.ast

Class TermNode

java.lang.Object

com.bigdata.bop.CoreBaseBOp

com.bigdata.bop.ModifiableBOpBase

com.bigdata.rdf.sparql.ast.ASTBase

com.bigdata.rdf.sparql.ast.ValueExpressionNode

com.bigdata.rdf.sparql.ast.TermNode

All Implemented Interfaces:

BOp, IValueExpressionNode, IPropertySet, Serializable, Cloneable

Direct Known Subclasses:

ConstantNode, VarNode

public abstract class TermNode
extends ValueExpressionNode

Used to represent a variable or constant in the AST (a term in a statement pattern for example). Unlike FunctionNodes, a TermNode models the IValueExpression directly as its sole child argument. This facilitates various rewrite patterns in which variables are renamed, etc.

Author:

mikepersonick

See Also:

Serialized Form

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
TermNode(BOp[] args, Map<String,Object> anns) Required shallow copy constructor.
TermNode(TermNode op) Constructor required for com.bigdata.bop.BOpUtility#deepCopy(FilterNode).

Method Summary

Methods

Modifier and Type	Method and Description
BigdataValue	getValue()
IVariableOrConstant<IV>	getValueExpression() Strengthen the return type.
void	invalidate() NOP.
void	setValueExpression(IValueExpression<? extends IV> ve) Operation is not supported (could be modeled by changing args[0] if we still want to do this).
String	toString(int i) The contract of this method at this level is under-specified.

Methods inherited from class com.bigdata.rdf.sparql.ast.ValueExpressionNode

getRequiredValueExpression, isConstant, isFunction, isVariable, toShortString

Methods inherited from class com.bigdata.rdf.sparql.ast.ASTBase

addExplainHint, getExplainHints, getQueryHint, getQueryHint, getQueryHintAsBoolean, getQueryHintAsBoolean, getQueryHintAsInteger, getQueryHints, replaceAllWith, setQueryHint, setQueryHints

Methods inherited from class com.bigdata.bop.ModifiableBOpBase

addArg, addArg, addArgIfAbsent, annotations, annotationsEqual, argIterator, args, arity, clearProperty, copyAll, get, getProperty, indexOf, removeArg, replaceWith, setArg, setArgs, setId, 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, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

TermNode

public TermNode(TermNode op)

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

TermNode

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

Required shallow copy constructor.

Method Detail

getValueExpression

public IVariableOrConstant<IV> getValueExpression()

Strengthen the return type.

Specified by:

getValueExpression in interface IValueExpressionNode

Overrides:

getValueExpression in class ValueExpressionNode

setValueExpression

public void setValueExpression(IValueExpression<? extends IV> ve)

Operation is not supported (could be modeled by changing args[0] if we still want to do this).

Specified by:

setValueExpression in interface IValueExpressionNode

Overrides:

setValueExpression in class ValueExpressionNode

invalidate

public final void invalidate()

NOP.

Specified by:

invalidate in interface IValueExpressionNode

Overrides:

invalidate in class ValueExpressionNode

getValue

public final BigdataValue getValue()

toString

public String toString(int i)

Description copied from class: CoreBaseBOp

The contract of this method at this level is under-specified. Sub-classes may choose between: - return a string representation of the object, similar to the use of CoreBaseBOp.toString() Or: - return a pretty-print representation of the object with indent Note that the former contract may or may not include recursive descent through a tree-like object, whereas the latter almost certainly does.

Specified by:

toString in interface BOp

Specified by:

toString in interface IValueExpressionNode

Overrides:

toString in class CoreBaseBOp

Returns: