er.neo4jadaptor.query

Class QueryConverter<ClauseType>

java.lang.Object

er.neo4jadaptor.query.QueryConverter<ClauseType>

Type Parameters:

ClauseType - query clause type

Direct Known Subclasses:

EvaluationQueryConverter, LuceneQueryConverter

public abstract class QueryConverter<ClauseType>
extends Object

Converts EOQualifiers to custom type of queries.

Author:

Jedrzej Sobanski

Constructor Summary

Constructors

Constructor and Description
QueryConverter()

Method Summary

Modifier and Type	Method and Description
protected abstract ClauseType	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.
protected ClauseType	convert(EOEntity entity, EOQualifier qualifier)
protected ClauseType	convertKeyValueQualifier(EOEntity entity, EOKeyValueQualifier qual)
abstract ClauseType	fullQuery(EOEntity entity, EOQualifier qualifier)
protected abstract ClauseType	joinWithAndOperator(Collection<ClauseType> queries)
protected abstract ClauseType	joinWithOrOperator(Collection<ClauseType> queries)
protected abstract ClauseType	matchAll()
protected abstract ClauseType	negate(ClauseType query) Creates negation of the given clause.

Methods inherited from class java.lang.Object

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

Constructor Detail

QueryConverter

public QueryConverter()

Method Detail

fullQuery

public abstract ClauseType fullQuery(EOEntity entity,
                                     EOQualifier qualifier)

Parameters:

entity -

qualifier -

Returns:

search criteria equivalent to the given qualifier

convert

protected ClauseType convert(EOEntity entity,
                             EOQualifier qualifier)

convertKeyValueQualifier

protected ClauseType convertKeyValueQualifier(EOEntity entity,
                                              EOKeyValueQualifier qual)

comparison

protected abstract ClauseType 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.

Parameters:

entity -

key -

operator -

value -

Returns:

a ClauseType object

negate

protected abstract ClauseType negate(ClauseType query)

Creates negation of the given clause.

Parameters:

query - clause to negate

Returns:

negated clause

joinWithAndOperator

protected abstract ClauseType joinWithAndOperator(Collection<ClauseType> queries)

Parameters:

queries - clauses to join with logical conjunction

Returns:

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

joinWithOrOperator

protected abstract ClauseType joinWithOrOperator(Collection<ClauseType> queries)

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 abstract ClauseType matchAll()

Returns:

clause that would match everyting