er.neo4jadaptor.query.neo4j_eval.evaluators

Class Comparison<T extends org.neo4j.graphdb.PropertyContainer>

java.lang.Object

er.neo4jadaptor.query.neo4j_eval.evaluators.Comparison<T>

Type Parameters:

T -

All Implemented Interfaces:

Evaluator<T>, HasCost

public class Comparison<T extends org.neo4j.graphdb.PropertyContainer>
extends Object
implements Evaluator<T>

Checks if a some of the candidate's property/relationship value is equal/greater/less than some value. To retrieve this property or relationship value it utilizes Retriever.

Author:

Jedrzej Sobanski

Constructor Summary

Constructors

Constructor and Description
Comparison(Retriever<T,?> valueRetriever, ComparisonOperator operator, Object value)

Method Summary

Modifier and Type	Method and Description
boolean	evaluate(T candidate) Perform object evaluation.
Cost	getCost()
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

Comparison

public Comparison(Retriever<T,?> valueRetriever,
                  ComparisonOperator operator,
                  Object value)

Parameters:

valueRetriever - retrieved to get the value from each candidate

operator - comparison operator

value - value to compare to

Method Detail

evaluate

public boolean evaluate(T candidate)

Description copied from interface: Evaluator

Perform object evaluation.

Specified by:

evaluate in interface Evaluator<T extends org.neo4j.graphdb.PropertyContainer>

Parameters:

candidate - object to be evaluated

Returns:

true if t matches criteria

getCost

public Cost getCost()

Specified by:

getCost in interface HasCost

toString

public String toString()

Overrides:

toString in class Object