de.ipcon.db

Class DefaultQueryHandler

java.lang.Object

de.ipcon.db.DefaultQueryHandler

All Implemented Interfaces:

QueryHandlerI

public class DefaultQueryHandler
extends java.lang.Object
implements QueryHandlerI

Constructor Summary

Constructors

Constructor and Description
DefaultQueryHandler(PersistenceHandlerI _persistenceHandler, java.lang.String _query, java.lang.Object[] _parms, short _mode, java.lang.String _tag, java.lang.String[] _prefetchPaths)

Method Summary

Modifier and Type	Method and Description
void	buildQuery()
java.lang.String	currentTag()
static java.lang.String	determineEntityName(java.lang.String q) Helper method for CastorPersistenceHandler.FulltextEvaluator.
PersistenceHandlerI	getPersistenceHandler()
java.lang.String	getQuery()
de.ipcon.db.core.QueryResultsI	iterateQuery()
boolean	parseProjectionPart() Parses the initial projection and entity parts of our query string.
static java.lang.String	testQuery(java.lang.String q)

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultQueryHandler

public DefaultQueryHandler(PersistenceHandlerI _persistenceHandler,
                           java.lang.String _query,
                           java.lang.Object[] _parms,
                           short _mode,
                           java.lang.String _tag,
                           java.lang.String[] _prefetchPaths)

Method Detail

testQuery

public static java.lang.String testQuery(java.lang.String q)

determineEntityName

public static java.lang.String determineEntityName(java.lang.String q)

Helper method for CastorPersistenceHandler.FulltextEvaluator.

Parameters:

q - the query of which the Fulltext MEX clause is part.

Returns:

the name of the Entity that is queried by _query.

parseProjectionPart

public boolean parseProjectionPart()

Parses the initial projection and entity parts of our query string.

This method attempts to match the structure: SELECT [projection_path.]entity_name FROM projection_root ... It extracts the projection, entity name, and the projection root.

Returns:

true if the projection part was successfully parsed and validated; false if the query does not match the expected pattern or is deemed too complex for this initial parsing step.

Throws:

java.lang.IllegalArgumentException - if a projection path is defined but does not match the specified projection root (anchor).

buildQuery

public void buildQuery()

getQuery

public java.lang.String getQuery()

getPersistenceHandler

public PersistenceHandlerI getPersistenceHandler()

Specified by:

getPersistenceHandler in interface QueryHandlerI

iterateQuery

public de.ipcon.db.core.QueryResultsI iterateQuery()

Specified by:

iterateQuery in interface QueryHandlerI

currentTag

public java.lang.String currentTag()

Specified by:

currentTag in interface QueryHandlerI