org.cloudgraph.hbase.graph

Class LocalEdgeRecognizerRelationalBinaryExpr

java.lang.Object

org.cloudgraph.query.expr.DefaultExpr

org.cloudgraph.query.expr.DefaultBinaryExpr

org.cloudgraph.query.expr.DefaultRelationalBinaryExpr

org.cloudgraph.hbase.graph.LocalEdgeRecognizerRelationalBinaryExpr

All Implemented Interfaces:

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

public class LocalEdgeRecognizerRelationalBinaryExpr
extends DefaultRelationalBinaryExpr
implements RelationalBinaryExpr

An RelationalBinaryExpr implementation which uses a specific evaluation context to locate or recognize a given sequence based column qualifier within the context of the expression.

A sequence uniquely identifies an data graph entity within a local data graph and is used to construct qualifier filters to return specific sequence-based column qualifiers and associated column values.

Since:

0.5.2

Author:

Scott Cinnamond

See Also:

LocalEdgeRecognizerContext

Field Summary

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

literal, operator, property, propertyPath

Constructor Summary

Constructors

Constructor and Description
LocalEdgeRecognizerRelationalBinaryExpr(org.plasma.query.model.Property property, String columnQualifierPrefix, org.plasma.query.model.Literal literal, org.plasma.query.model.RelationalOperator operator) Constructs an expression based on the given terms and column qualifier prefix.

Method Summary

Modifier and Type	Method and Description
boolean	evaluate(EvaluationContext context) Returns a "truth" value for the expression using a specific evaluation context to locate or recognize a given sequence based column qualifier within the context of the expression.

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

Constructor Detail

LocalEdgeRecognizerRelationalBinaryExpr

public LocalEdgeRecognizerRelationalBinaryExpr(org.plasma.query.model.Property property,
                                               String columnQualifierPrefix,
                                               org.plasma.query.model.Literal literal,
                                               org.plasma.query.model.RelationalOperator operator)

Constructs an expression based on the given terms and column qualifier prefix.

Parameters:

property - the "left" property term

columnQualifierPrefix - the qualifier prefix used to evaluate the expression for a given context.

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 to locate or recognize a given sequence based column qualifier within the context of the expression.

Specified by:

evaluate in interface Expr

Overrides:

evaluate in class DefaultRelationalBinaryExpr

Parameters:

context -

Returns:

a "truth" value for the expression using a specific evaluation context to locate or recognize a given sequence based column qualifier within the context of the expression.

See Also:

LocalEdgeRecognizerContext