org.apache.openjpa.persistence.query.QueryBuilderImpl Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* 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
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.openjpa.persistence.query;
import org.apache.openjpa.kernel.Query;
import org.apache.openjpa.meta.MetaDataRepository;
import org.apache.openjpa.persistence.OpenJPAEntityManagerFactorySPI;
/**
* The factory for QueryDefinition.
*
*
* @author Pinaki Poddar
*
*/
public class QueryBuilderImpl implements OpenJPAQueryBuilder {
private final OpenJPAEntityManagerFactorySPI _emf;
public QueryBuilderImpl(OpenJPAEntityManagerFactorySPI emf) {
_emf = emf;
}
/**
* Creates a QueryDefinition without a domain.
*/
@Override
public QueryDefinition createQueryDefinition() {
return new QueryDefinitionImpl(this);
}
/**
* Creates a QueryDefinition with given class as domain.
*/
@Override
public DomainObject createQueryDefinition(Class root) {
return new QueryDefinitionImpl(this).addRoot(root);
}
/**
* Creates a QueryDefinition that can be used a correlated subquery
* with the given path as domain.
*/
@Override
public DomainObject createSubqueryDefinition(PathExpression path) {
return new QueryDefinitionImpl(this).addSubqueryRoot(path);
}
@Override
public String toJPQL(QueryDefinition query) {
MetaDataRepository repos = _emf.getConfiguration()
.getMetaDataRepositoryInstance();
AliasContext ctx = new AliasContext(repos);
if (query instanceof AbstractDomainObject)
return ((AbstractDomainObject)query).getOwner().asExpression(ctx);
return ((QueryDefinitionImpl)query).asExpression(ctx);
}
@Override
public QueryDefinition createQueryDefinition(String jpql) {
throw new UnsupportedOperationException();
}
@Override
public QueryDefinition createQueryDefinition(Query jpql) {
throw new UnsupportedOperationException();
}
}