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Hibernate example source code file (SubselectFetch.java)

This example Hibernate source code file (SubselectFetch.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Hibernate tags/keywords

loadable, map, map, override, propertymapping, queryparameters, queryparameters, set, string, string, stringbuffer, subselectfetch, subselectfetch, util

The Hibernate SubselectFetch.java source code

/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2008-2011, Red Hat Inc. or third-party contributors as
 * indicated by the @author tags or express copyright attribution
 * statements applied by the authors.  All third-party contributions are
 * distributed under license by Red Hat Inc.
 *
 * This copyrighted material is made available to anyone wishing to use, modify,
 * copy, or redistribute it subject to the terms and conditions of the GNU
 * Lesser General Public License, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this distribution; if not, write to:
 * Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor
 * Boston, MA  02110-1301  USA
 */
package org.hibernate.engine.spi;

import java.util.Map;
import java.util.Set;

import org.hibernate.internal.util.StringHelper;
import org.hibernate.persister.entity.Loadable;
import org.hibernate.persister.entity.PropertyMapping;

/**
 * @author Gavin King
 */
public class SubselectFetch {
	private final Set resultingEntityKeys;
	private final String queryString;
	private final String alias;
	private final Loadable loadable;
	private final QueryParameters queryParameters;
	private final Map namedParameterLocMap;

	public SubselectFetch(
		//final String queryString,
		final String alias,
		final Loadable loadable,
		final QueryParameters queryParameters,
		final Set resultingEntityKeys,
		final Map namedParameterLocMap
	) {
		this.resultingEntityKeys = resultingEntityKeys;
		this.queryParameters = queryParameters;
		this.namedParameterLocMap = namedParameterLocMap;
		this.loadable = loadable;
		this.alias = alias;

		//TODO: ugly here:
		final String queryString = queryParameters.getFilteredSQL();
		int fromIndex = queryString.indexOf(" from ");
		int orderByIndex = queryString.lastIndexOf("order by");
		this.queryString = orderByIndex>0 ?
				queryString.substring(fromIndex, orderByIndex) :
				queryString.substring(fromIndex);

	}

	public QueryParameters getQueryParameters() {
		return queryParameters;
	}

	/**
	 * Get the Set of EntityKeys
	 */
	public Set getResult() {
		return resultingEntityKeys;
	}

	public String toSubselectString(String ukname) {

		String[] joinColumns = ukname==null ?
			StringHelper.qualify( alias, loadable.getIdentifierColumnNames() ) :
			( (PropertyMapping) loadable ).toColumns(alias, ukname);

		return new StringBuffer()
			.append("select ")
			.append( StringHelper.join(", ", joinColumns) )
			.append(queryString)
			.toString();
	}

	@Override
    public String toString() {
		return "SubselectFetch(" + queryString + ')';
	}

	public Map getNamedParameterLocMap() {
		return namedParameterLocMap;
	}

}

Other Hibernate examples (source code examples)

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