er.neo4jadaptor.query.neo4j_eval

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

java.lang.Object

er.neo4jadaptor.query.QueryConverter<Evaluator<T>>

er.neo4jadaptor.query.neo4j_eval.EvaluationQueryConverter<T>

Type Parameters:

T -

public class EvaluationQueryConverter<T extends org.neo4j.graphdb.PropertyContainer>
extends QueryConverter<Evaluator<T>>

Converts EOQualifier to Evaluator having exactly the same semantics.

Author:

Jedrzej Sobanski

Constructor Summary

Constructors

Constructor and Description
EvaluationQueryConverter()

Method Summary

Modifier and Type	Method and Description
protected Evaluator<T>	comparison(EOEntity entity, String key, ComparisonOperator operator, Object value) Creates clause that matches records where the given entity key matches given value using comparison operator.
Evaluator<T>	fullQuery(EOEntity entity, EOQualifier qualifier)
protected Evaluator<T>	joinWithAndOperator(Collection<Evaluator<T>> queries)
protected Evaluator<T>	joinWithOrOperator(Collection<Evaluator<T>> queries)
protected Evaluator<T>	matchAll()
protected Evaluator<T>	negate(Evaluator<T> query) Creates negation of the given clause.

Methods inherited from class er.neo4jadaptor.query.QueryConverter

convert, convertKeyValueQualifier

Methods inherited from class java.lang.Object

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

Constructor Detail

EvaluationQueryConverter

public EvaluationQueryConverter()

Method Detail

comparison

protected Evaluator<T> comparison(EOEntity entity,
                                  String key,
                                  ComparisonOperator operator,
                                  Object value)

Description copied from class: QueryConverter

Creates clause that matches records where the given entity key matches given value using comparison operator.

Specified by:

comparison in class QueryConverter<Evaluator<T extends org.neo4j.graphdb.PropertyContainer>>

Returns:

a ClauseType object

fullQuery

public Evaluator<T> fullQuery(EOEntity entity,
                              EOQualifier qualifier)

Specified by:

fullQuery in class QueryConverter<Evaluator<T extends org.neo4j.graphdb.PropertyContainer>>

Returns:

search criteria equivalent to the given qualifier

joinWithAndOperator

protected Evaluator<T> joinWithAndOperator(Collection<Evaluator<T>> queries)

Specified by:

joinWithAndOperator in class QueryConverter<Evaluator<T extends org.neo4j.graphdb.PropertyContainer>>

Parameters:

queries - clauses to join with logical conjunction

Returns:

clause that would evaluate to true if all of queries evaluate to true

joinWithOrOperator

protected Evaluator<T> joinWithOrOperator(Collection<Evaluator<T>> queries)

Specified by:

joinWithOrOperator in class QueryConverter<Evaluator<T extends org.neo4j.graphdb.PropertyContainer>>

Parameters:

queries - clauses to join with logical alternative

Returns:

clause that would evaluate to true if at least one of queries evaluates to true

matchAll

protected Evaluator<T> matchAll()

Specified by:

matchAll in class QueryConverter<Evaluator<T extends org.neo4j.graphdb.PropertyContainer>>

Returns:

clause that would match everyting

negate

protected Evaluator<T> negate(Evaluator<T> query)

Description copied from class: QueryConverter

Creates negation of the given clause.

Specified by:

negate in class QueryConverter<Evaluator<T extends org.neo4j.graphdb.PropertyContainer>>

Parameters:

query - clause to negate

Returns:

negated clause