Java tutorial
/** * This code is part of the Harmony System implemented in Work Package 1 * of the Phosphorus project. This work is supported by the European * Comission under the Sixth Framework Programme with contract number * IST-034115. * * Copyright (C) 2006-2009 Phosphorus WP1 partners. Phosphorus Consortium. * http://ist-phosphorus.eu/ * * This is free software; you can redistribute it and/or modify it * under the terms of the GNU Lesser General Public License as * published by the Free Software Foundation; either version 2.1 of * the License, or (at your option) any later version. * * This software 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 software; if not, write to the Free * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA * 02110-1301 USA, or see the FSF site: http://www.fsf.org. */ package eu.ist_phosphorus.harmony.idb.database.hibernate; import java.util.Arrays; import java.util.HashSet; import java.util.List; import java.util.Set; import javax.persistence.Entity; import javax.persistence.FetchType; import javax.persistence.GeneratedValue; import javax.persistence.GenerationType; import javax.persistence.Id; import javax.persistence.JoinColumn; import javax.persistence.ManyToOne; import javax.persistence.Table; import javax.persistence.Transient; import org.hibernate.FetchMode; import org.hibernate.Session; import org.hibernate.annotations.Proxy; import org.hibernate.criterion.Restrictions; import eu.ist_phosphorus.harmony.idb.database.TransactionManager; import eu.ist_phosphorus.harmony.idb.database.TransactionManagerLoad; import eu.ist_phosphorus.harmony.idb.exceptions.database.DatabaseException; /** * @author Stephan Wagner (wagners@cs.uni-bonn.de) * @version 0.1 */ @Entity @Table(name = "DomSupportedBandwidth") @Proxy(lazy = false) public class DomSupportedBandwidth implements java.io.Serializable, Comparable<DomSupportedBandwidth> { /** * */ private static final long serialVersionUID = 3047229020374814462L; /** primary key of the table in the Database. */ private long PK_Bw; /** corresponding domain.*/ private Domain domain; /** supported bandwidth of the domain. */ private long bw; /** * */ public DomSupportedBandwidth() { // empty } /** * minimal constructor. */ public DomSupportedBandwidth(final Domain domainParam) { super(); this.domain = domainParam; } /** * full constructor. * * @param domainParam * corresponding domain * @param bwParam * supported bandwidth of the domain */ public DomSupportedBandwidth(final Domain domainParam, final long bwParam) { super(); this.domain = domainParam; setBandwidth(bwParam); } /** * @return the pkBw */ @Id @GeneratedValue(strategy = GenerationType.AUTO) public long getPK_Bandwidth() { return this.PK_Bw; } /** * @param pkBwParam * the pkBw to set */ public void setPK_Bandwidth(long pkBwParam) { this.PK_Bw = pkBwParam; } /** * @return domain */ @ManyToOne(fetch = FetchType.LAZY) @JoinColumn(name = "FK_domainName") public Domain getDomain() { return this.domain; } /** * @param domainParam * corresponding domain */ public void setDomain(final Domain domainParam) { this.domain = domainParam; } /** * @return supported bandwidth of the domain */ public long getBandwidth() { return this.bw; } /** * @param bwParam * supported bandwidth of the domain */ public void setBandwidth(final long bwParam) { this.bw = bwParam; } /** * @param domainBwParam * domainBw to be compared * @return -1 0 1 * @see java.lang.Comparable#compareTo(java.lang.Object) */ public int compareTo(final DomSupportedBandwidth domainBwParam) { if (this.bw < domainBwParam.getBandwidth()) { return -1; } else if (this.bw == domainBwParam.getBandwidth()) { return 0; } else { return 1; } } /** * @param domainBwParam * domainBw to be checked * @return true if equals */ public boolean isEqual(final DomSupportedBandwidth domainBwParam) { if (this.hashCode() == domainBwParam.hashCode()) { return true; } return false; } /** * @param o * @return */ @Override public boolean equals(final Object o) { if (o.getClass() == DomSupportedBandwidth.class) { return isEqual((DomSupportedBandwidth) o); } return false; } /* (non-Javadoc) * @see java.lang.Object#hashCode() */ @Override public int hashCode() { int result = Long.valueOf(this.getPK_Bandwidth()).hashCode() ^ Long.valueOf(this.getBandwidth()).hashCode(); return result; } /** * @return copy of domainBw */ @Transient public DomSupportedBandwidth getCopy() { return new DomSupportedBandwidth(this.domain, this.bw); } public void save(Session session) { session.saveOrUpdate(this); } public void save() throws DatabaseException { new TransactionManager(new HashSet<Object>(Arrays.asList(domain))) { @Override protected void dbOperation() throws Exception { save(this.session); } }; } public static DomSupportedBandwidth load(final long id) throws DatabaseException { return (DomSupportedBandwidth) (new TransactionManagerLoad(DomSupportedBandwidth.class, Long.valueOf(id))) .getResult(); } public void delete() throws DatabaseException { new TransactionManager(new HashSet<Object>(Arrays.asList(domain))) { @Override protected void dbOperation() throws Exception { delete(this.session); } }; } public void delete(Session session) { session.delete(this); } @SuppressWarnings("unchecked") public static Set<DomSupportedBandwidth> loadAll(Domain dom) throws DatabaseException { return (Set<DomSupportedBandwidth>) (new TransactionManager(dom) { @Override protected void dbOperation() { final Domain d = (Domain) this.arg; final List<DomSupportedBandwidth> bList = this.session.createCriteria(DomSupportedBandwidth.class) .setFetchMode("", FetchMode.SELECT).add(Restrictions.like("domain", d)).list(); final Set<DomSupportedBandwidth> bws = new HashSet<DomSupportedBandwidth>(); for (final DomSupportedBandwidth bw : bList) { bws.add(bw); } this.result = bws; } }).getResult(); } @Override public String toString() { return "<domainBw><bw>" + getBandwidth() + "</bw><domain>" + getDomain().getName() + "</domain></domainBw>"; } }