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Hibernate's entity version (audit/history) support
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* License: GNU Lesser General Public License (LGPL), version 2.1 or later.
* See the lgpl.txt file in the root directory or .
*/
package org.hibernate.envers.internal.entities.mapper.id;
import java.util.Iterator;
import java.util.List;
import org.hibernate.envers.internal.tools.query.Parameters;
import org.hibernate.service.ServiceRegistry;
/**
* @author Adam Warski (adam at warski dot org)
* @author Chris Cranford
*/
public abstract class AbstractIdMapper implements IdMapper {
private final ServiceRegistry serviceRegistry;
public AbstractIdMapper(ServiceRegistry serviceRegistry) {
this.serviceRegistry = serviceRegistry;
}
@Override
public ServiceRegistry getServiceRegistry() {
return serviceRegistry;
}
private Parameters getParametersToUse(Parameters parameters, List paramDatas) {
if ( paramDatas.size() > 1 ) {
return parameters.addSubParameters( "and" );
}
else {
return parameters;
}
}
@Override
public void addIdsEqualToQuery(Parameters parameters, String prefix1, String prefix2) {
final List paramDatas = mapToQueryParametersFromId( null );
final Parameters parametersToUse = getParametersToUse( parameters, paramDatas );
for ( QueryParameterData paramData : paramDatas ) {
parametersToUse.addWhere(
paramData.getProperty( prefix1 ),
false,
"=",
paramData.getProperty( prefix2 ),
false
);
}
}
@Override
public void addIdsEqualToQuery(Parameters parameters, String prefix1, IdMapper mapper2, String prefix2) {
final List paramDatas1 = mapToQueryParametersFromId( null );
final List paramDatas2 = mapper2.mapToQueryParametersFromId( null );
final Parameters parametersToUse = getParametersToUse( parameters, paramDatas1 );
final Iterator paramDataIter1 = paramDatas1.iterator();
final Iterator paramDataIter2 = paramDatas2.iterator();
while ( paramDataIter1.hasNext() ) {
final QueryParameterData paramData1 = paramDataIter1.next();
final QueryParameterData paramData2 = paramDataIter2.next();
parametersToUse.addWhereOrNullRestriction(
paramData1.getProperty( prefix1 ),
false,
"=",
paramData2.getProperty( prefix2 ),
false
);
}
}
@Override
public void addIdEqualsToQuery(Parameters parameters, Object id, String alias, String prefix, boolean equals) {
final List paramDatas = mapToQueryParametersFromId( id );
final Parameters parametersToUse = getParametersToUse( parameters, paramDatas );
for ( QueryParameterData paramData : paramDatas ) {
if ( paramData.getValue() == null ) {
handleNullValue( parametersToUse, alias, paramData.getProperty( prefix ), equals );
}
else if ( alias == null ) {
parametersToUse.addWhereWithParam(
paramData.getProperty( prefix ),
equals ? "=" : "<>",
paramData.getValue()
);
}
else {
parametersToUse.addWhereWithParam(
alias,
paramData.getProperty( prefix ),
equals ? "=" : "<>",
paramData.getValue()
);
}
}
}
@Override
public void addNamedIdEqualsToQuery(Parameters parameters, String prefix, boolean equals) {
final List paramDatas = mapToQueryParametersFromId( null );
final Parameters parametersToUse = getParametersToUse( parameters, paramDatas );
for ( QueryParameterData paramData : paramDatas ) {
parametersToUse.addWhereWithNamedParam(
paramData.getProperty( prefix ),
equals ? "=" : "<>",
paramData.getQueryParameterName()
);
}
}
@Override
public void addNamedIdEqualsToQuery(Parameters parameters, String prefix1, IdMapper mapper, boolean equals) {
final List paramDatas1 = mapToQueryParametersFromId( null );
final List paramDatas2 = mapper.mapToQueryParametersFromId( null );
final Parameters parametersToUse = getParametersToUse( parameters, paramDatas1 );
final Iterator paramDataIter1 = paramDatas1.iterator();
final Iterator paramDataIter2 = paramDatas2.iterator();
while ( paramDataIter1.hasNext() ) {
final QueryParameterData paramData1 = paramDataIter1.next();
final QueryParameterData paramData2 = paramDataIter2.next();
parametersToUse.addWhereWithNamedParam(
paramData1.getProperty( prefix1 ),
equals ? "=" : "<>",
paramData2.getQueryParameterName()
);
}
}
private void handleNullValue(Parameters parameters, String alias, String propertyName, boolean equals) {
if ( equals ) {
parameters.addNullRestriction( alias, propertyName );
}
else {
parameters.addNotNullRestriction( alias, propertyName );
}
}
}