org.cloudgraph.hbase.scan

Class ScanRecognizerRelationalBinaryExpr

java.lang.Object

org.cloudgraph.query.expr.DefaultExpr

org.cloudgraph.query.expr.DefaultBinaryExpr

org.cloudgraph.query.expr.DefaultRelationalBinaryExpr

org.cloudgraph.hbase.scan.ScanRecognizerRelationalBinaryExpr

All Implemented Interfaces:

BinaryExpr, Expr, RelationalBinaryExpr, org.plasma.query.Term

public class ScanRecognizerRelationalBinaryExpr
extends DefaultRelationalBinaryExpr
implements RelationalBinaryExpr

An RelationalBinaryExpr implementation which uses a specific evaluation context to evaluate the value(s) of a data graph property along the query property traversal path within the context of a binary expression (syntax) tree.

Since:

0.5.3

Author:

Scott Cinnamond

See Also:

ScanRecognizerContext

Field Summary

Fields

Modifier and Type	Field and Description
protected StoreMappingContext	mappingContext
protected ScanLiteral	scanLiteral

Fields inherited from class org.cloudgraph.query.expr.DefaultRelationalBinaryExpr

literal, operator, property, propertyPath

Constructor Summary

Constructors

Constructor and Description
ScanRecognizerRelationalBinaryExpr(org.plasma.query.model.Property property, org.plasma.query.model.Literal literal, org.plasma.query.model.RelationalOperator operator, StoreMappingContext mappingContext) Constructs an expression based on the given terms.

Method Summary

Modifier and Type	Method and Description
boolean	evaluate(EvaluationContext context) Returns a "truth" value for the expression using a specific evaluation context by ...

Methods inherited from class org.cloudgraph.query.expr.DefaultRelationalBinaryExpr

getLiteral, getOperator, getProperty, getPropertyPath, toString

Methods inherited from class org.cloudgraph.query.expr.DefaultBinaryExpr

accept, createPropertyPath, getLeft, getRight, setLeft, setRight

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.cloudgraph.query.expr.RelationalBinaryExpr

getLiteral, getOperator, getProperty, getPropertyPath

Methods inherited from interface org.cloudgraph.query.expr.BinaryExpr

accept, getLeft, getRight

Field Detail

scanLiteral

protected ScanLiteral scanLiteral

mappingContext

protected StoreMappingContext mappingContext

Constructor Detail

ScanRecognizerRelationalBinaryExpr

public ScanRecognizerRelationalBinaryExpr(org.plasma.query.model.Property property,
                                          org.plasma.query.model.Literal literal,
                                          org.plasma.query.model.RelationalOperator operator,
                                          StoreMappingContext mappingContext)

Constructs an expression based on the given terms.

Parameters:

property - the "left" property term

literal - the "right" literal term

operator - the relational operator

See Also:

LocalEdgeRecognizerContext

Method Detail

evaluate

public boolean evaluate(EvaluationContext context)

Returns a "truth" value for the expression using a specific evaluation context by ... within the binary expression tree.

Specified by:

evaluate in interface Expr

Overrides:

evaluate in class DefaultRelationalBinaryExpr

Parameters:

context -

Returns:

a "truth" value for the expression

See Also:

ScanRecognizerContext