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* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
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package org.apache.isis.objectstore.jdo.datanucleus.persistence.queries;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import javax.jdo.PersistenceManager;
import javax.jdo.Query;
import com.google.common.collect.Maps;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
import org.apache.isis.core.metamodel.services.container.query.QueryCardinality;
import org.apache.isis.core.metamodel.spec.ObjectSpecification;
import org.apache.isis.core.metamodel.spec.feature.OneToOneAssociation;
import org.apache.isis.core.runtime.persistence.query.PersistenceQueryFindUsingApplibQueryDefault;
import org.apache.isis.objectstore.jdo.datanucleus.metamodel.JdoPropertyUtils;
import org.apache.isis.objectstore.jdo.datanucleus.persistence.FrameworkSynchronizer;
public class PersistenceQueryFindUsingApplibQueryProcessor extends PersistenceQueryProcessorAbstract<PersistenceQueryFindUsingApplibQueryDefault> {
private static final Logger LOG = LoggerFactory.getLogger(PersistenceQueryFindUsingApplibQueryProcessor.class);
public PersistenceQueryFindUsingApplibQueryProcessor(final PersistenceManager persistenceManager, final FrameworkSynchronizer frameworkSynchronizer) {
super(persistenceManager, frameworkSynchronizer);
}
public List<ObjectAdapter> process(final PersistenceQueryFindUsingApplibQueryDefault persistenceQuery) {
final String queryName = persistenceQuery.getQueryName();
final ObjectSpecification objectSpec = persistenceQuery.getSpecification();
final List<?> results;
if((objectSpec.getFullIdentifier() + "#pk").equals(queryName)) {
results = getResultsPk(persistenceQuery);
} else {
results = getResults(persistenceQuery);
}
return loadAdapters(objectSpec, results);
}
// special case handling
private List<?> getResultsPk(final PersistenceQueryFindUsingApplibQueryDefault persistenceQuery) {
final String queryName = persistenceQuery.getQueryName();
final Map<String, Object> map = unwrap(persistenceQuery.getArgumentsAdaptersByParameterName());
final ObjectSpecification objectSpec = persistenceQuery.getSpecification();
final Class<?> cls = objectSpec.getCorrespondingClass();
if(!JdoPropertyUtils.hasPrimaryKeyProperty(objectSpec)) {
throw new UnsupportedOperationException("cannot search by primary key for DataStore-assigned entities");
}
final OneToOneAssociation pkOtoa = JdoPropertyUtils.getPrimaryKeyPropertyFor(objectSpec);
final String pkOtoaId = pkOtoa.getId();
final String filter = pkOtoaId + "==" + map.get(pkOtoaId);
final Query jdoQuery = getPersistenceManager().newQuery(cls, filter);
// http://www.datanucleus.org/servlet/jira/browse/NUCCORE-1103
jdoQuery.addExtension("datanucleus.multivaluedFetch", "none");
if (LOG.isDebugEnabled()) {
LOG.debug(cls.getName() + " # " + queryName + " ( " + filter + " )");
}
return (List<?>) jdoQuery.execute();
}
private List<?> getResults(final PersistenceQueryFindUsingApplibQueryDefault persistenceQuery) {
final String queryName = persistenceQuery.getQueryName();
final Map<String, Object> argumentsByParameterName = unwrap(persistenceQuery.getArgumentsAdaptersByParameterName());
final QueryCardinality cardinality = persistenceQuery.getCardinality();
final ObjectSpecification objectSpec = persistenceQuery.getSpecification();
final PersistenceManager persistenceManager = getJdoObjectStore().getPersistenceManager();
final Class<?> cls = objectSpec.getCorrespondingClass();
final Query jdoQuery = persistenceManager.newNamedQuery(cls, queryName);
// http://www.datanucleus.org/servlet/jira/browse/NUCCORE-1103
jdoQuery.addExtension("datanucleus.multivaluedFetch", "none");
if(persistenceQuery.hasRange()) {
jdoQuery.setRange(persistenceQuery.getStart(), persistenceQuery.getEnd());
}
if (LOG.isDebugEnabled()) {
LOG.debug(cls.getName() + " # " + queryName + " ( " + argumentsByParameterName + " )");
}
final List<?> results = (List<?>) jdoQuery.executeWithMap(argumentsByParameterName);
if (cardinality == QueryCardinality.MULTIPLE) {
return results;
}
return results.isEmpty()?Collections.emptyList():results.subList(0, 1);
}
private static Map<String, Object> unwrap(final Map<String, ObjectAdapter> argumentAdaptersByParameterName) {
final Map<String, Object> argumentsByParameterName = Maps.newHashMap();
for (final String parameterName : argumentAdaptersByParameterName.keySet()) {
final ObjectAdapter argumentAdapter = argumentAdaptersByParameterName.get(parameterName);
final Object argument = ObjectAdapter.Util.unwrap(argumentAdapter);
argumentsByParameterName.put(parameterName, argument);
}
return argumentsByParameterName;
}
}
// Copyright (c) Naked Objects Group Ltd.