Java tutorial
/******************************************************************************* * HELIUM V, Open Source ERP software for sustained success * at small and medium-sized enterprises. * Copyright (C) 2004 - 2014 HELIUM V IT-Solutions GmbH * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License as published * by the Free Software Foundation, either version 3 of theLicense, or * (at your option) any later version. * * According to sec. 7 of the GNU Affero General Public License, version 3, * the terms of the AGPL are supplemented with the following terms: * * "HELIUM V" and "HELIUM 5" are registered trademarks of * HELIUM V IT-Solutions GmbH. The licensing of the program under the * AGPL does not imply a trademark license. Therefore any rights, title and * interest in our trademarks remain entirely with us. If you want to propagate * modified versions of the Program under the name "HELIUM V" or "HELIUM 5", * you may only do so if you have a written permission by HELIUM V IT-Solutions * GmbH (to acquire a permission please contact HELIUM V IT-Solutions * at trademark@heliumv.com). * * 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 Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. * * Contact: developers@heliumv.com ******************************************************************************/ package com.lp.server.finanz.fastlanereader; import java.util.Iterator; import java.util.List; import java.util.Locale; import org.hibernate.HibernateException; import org.hibernate.Query; import org.hibernate.ScrollableResults; import org.hibernate.Session; import org.hibernate.SessionFactory; import com.lp.server.finanz.fastlanereader.generated.FLRKontoLand; import com.lp.server.finanz.service.FinanzFac; import com.lp.server.system.service.SystemFac; import com.lp.server.util.fastlanereader.FLRSessionFactory; import com.lp.server.util.fastlanereader.UseCaseHandler; import com.lp.server.util.fastlanereader.service.query.FilterBlock; import com.lp.server.util.fastlanereader.service.query.FilterKriterium; import com.lp.server.util.fastlanereader.service.query.QueryResult; import com.lp.server.util.fastlanereader.service.query.SortierKriterium; import com.lp.server.util.fastlanereader.service.query.TableInfo; import com.lp.util.EJBExceptionLP; /** * <p> * Diese Klasse kuemmert sich um ... * </p> * * <p> * Copyright Logistik Pur GmbH (c) 2004, 2005, 2006 * </p> * * <p> * Erstellung: Vorname Nachname; dd.mm.06 * </p> * * <p> * * @author $Author: heidi $ * </p> * * @version unbekannt Date $Date: 2009/04/28 08:32:43 $ */ public class KontoLandHandler extends UseCaseHandler { /** * */ private static final long serialVersionUID = 1L; private static final String FLR_KONTOLAND = "flrkontoland."; private static final String FLR_KONTOLAND_FROM_CLAUSE = " from FLRKontoLand flrkontoland "; public KontoLandHandler() { super(); } /** * gets the page of data for the specified row using the current * queryParameters. * * @param rowIndex * the index of the row that should be contained in the page. * @return the data page for the specified row. * @throws EJBExceptionLP * @todo Diese com.lp.server.util.fastlanereader.UseCaseHandler-Methode * implementieren */ public QueryResult getPageAt(Integer rowIndex) throws EJBExceptionLP { QueryResult result = null; SessionFactory factory = FLRSessionFactory.getFactory(); Session session = null; try { int colCount = getTableInfo().getColumnClasses().length; int pageSize = KontoLandHandler.PAGE_SIZE; int startIndex = Math.max(rowIndex.intValue() - (pageSize / 2), 0); int endIndex = startIndex + pageSize - 1; session = factory.openSession(); String queryString = this.getFromClause() + this.buildWhereClause() + this.buildOrderByClause(); Query query = session.createQuery(queryString); query.setFirstResult(startIndex); query.setMaxResults(pageSize); List<?> resultList = query.list(); Iterator<?> resultListIterator = resultList.iterator(); Object[][] rows = new Object[resultList.size()][colCount]; int row = 0; int col = 0; while (resultListIterator.hasNext()) { FLRKontoLand kontoland = (FLRKontoLand) resultListIterator.next(); rows[row][col++] = kontoland.getId_comp(); rows[row][col++] = kontoland.getFlrland().getC_name(); rows[row][col++] = kontoland.getFlrkonto_uebersetzt().getC_nr(); rows[row][col++] = kontoland.getFlrkonto_uebersetzt().getC_bez(); row++; col = 0; } result = new QueryResult(rows, this.getRowCount(), startIndex, endIndex, 0); } catch (Exception e) { throw new EJBExceptionLP(EJBExceptionLP.FEHLER_FLR, e); } finally { try { session.close(); } catch (HibernateException he) { throw new EJBExceptionLP(EJBExceptionLP.FEHLER, he); } } return result; } /** * gets the total number of rows available using the current query. * * @return the number of rows in the query. * @todo Diese com.lp.server.util.fastlanereader.UseCaseHandler-Methode * implementieren */ protected long getRowCountFromDataBase() { long rowCount = 0; SessionFactory factory = FLRSessionFactory.getFactory(); Session session = null; try { session = factory.openSession(); String queryString = "select count(*) " + this.getFromClause() + this.buildWhereClause(); Query query = session.createQuery(queryString); List<?> rowCountResult = query.list(); if (rowCountResult != null && rowCountResult.size() > 0) { rowCount = ((Long) rowCountResult.get(0)).longValue(); } } catch (Exception e) { throw new EJBExceptionLP(EJBExceptionLP.FEHLER, e); } finally { if (session != null) { try { session.close(); } catch (HibernateException he) { throw new EJBExceptionLP(EJBExceptionLP.FEHLER, he); } } } return rowCount; } private String buildWhereClause() { StringBuffer where = new StringBuffer(""); if (this.getQuery() != null && this.getQuery().getFilterBlock() != null && this.getQuery().getFilterBlock().filterKrit != null) { FilterBlock filterBlock = this.getQuery().getFilterBlock(); FilterKriterium[] filterKriterien = this.getQuery().getFilterBlock().filterKrit; String booleanOperator = filterBlock.boolOperator; boolean filterAdded = false; for (int i = 0; i < filterKriterien.length; i++) { if (filterKriterien[i].isKrit) { if (filterAdded) { where.append(" " + booleanOperator); } filterAdded = true; where.append(" " + FLR_KONTOLAND + filterKriterien[i].kritName); where.append(" " + filterKriterien[i].operator); where.append(" " + filterKriterien[i].value); } } if (filterAdded) { where.insert(0, " WHERE"); } } return where.toString(); } private String buildOrderByClause() { StringBuffer orderBy = new StringBuffer(""); if (this.getQuery() != null) { SortierKriterium[] kriterien = this.getQuery().getSortKrit(); boolean sortAdded = false; if (kriterien != null && kriterien.length > 0) { for (int i = 0; i < kriterien.length; i++) { if (kriterien[i].isKrit) { if (sortAdded) { orderBy.append(", "); } sortAdded = true; orderBy.append(FLR_KONTOLAND + kriterien[i].kritName); orderBy.append(" "); orderBy.append(kriterien[i].value); } } } else { // no sort criteria found, add default sort if (sortAdded) { orderBy.append(", "); } orderBy.append(FLR_KONTOLAND) .append(FinanzFac.FLR_KONTOLAND_FLRKONTOUEBERSETZT + "." + FinanzFac.FLR_KONTO_C_NR) .append(" ASC "); sortAdded = true; } if (orderBy.indexOf(FLR_KONTOLAND + FinanzFac.FLR_KONTOLAND_FLRKONTOUEBERSETZT + "." + FinanzFac.FLR_KONTO_C_NR) < 0) { // unique sort required because otherwise rowNumber of // selectedId // within sort() method may be different from the position of // selectedId // as returned in the page of getPageAt(). if (sortAdded) { orderBy.append(", "); } orderBy.append(" ").append(FLR_KONTOLAND) .append(FinanzFac.FLR_KONTOLAND_FLRKONTOUEBERSETZT + "." + FinanzFac.FLR_KONTO_C_NR) .append(" "); sortAdded = true; } if (sortAdded) { orderBy.insert(0, " ORDER BY "); } } return orderBy.toString(); } private String getFromClause() { return FLR_KONTOLAND_FROM_CLAUSE; } public TableInfo getTableInfo() { if (super.getTableInfo() == null) { String mandantCNr = theClientDto.getMandant(); Locale locUI = theClientDto.getLocUi(); setTableInfo(new TableInfo(new Class[] { Integer.class, String.class, String.class, String.class }, new String[] { "i_id", getTextRespectUISpr("fb.land", mandantCNr, locUI), getTextRespectUISpr("lp.konto", mandantCNr, locUI), getTextRespectUISpr("lp.bezeichnung", mandantCNr, locUI) }, new String[] { "", FinanzFac.FLR_KONTOLAND_FLRLAND + "." + SystemFac.FLR_LP_ORTNAME, FinanzFac.FLR_KONTOLAENDERART_FLRKONTOUEBERSETZT + "." + FinanzFac.FLR_KONTO_C_NR, FinanzFac.FLR_KONTOLAENDERART_FLRKONTOUEBERSETZT + "." + FinanzFac.FLR_KONTO_C_BEZ })); } return super.getTableInfo(); } /** * sorts the data of the current query using the specified criterias and * returns the page of data where the row of selectedId is contained. * * @param sortierKriterien * the new sort criterias. * @param selectedId * the id of the entity that should be included in the result * page. * @return the sorted data containing the page where the entity with the * specified id is located. * @throws EJBExceptionLP * @todo Diese com.lp.server.util.fastlanereader.UseCaseHandler-Methode * implementieren */ public QueryResult sort(SortierKriterium[] sortierKriterien, Object selectedId) throws EJBExceptionLP { this.getQuery().setSortKrit(sortierKriterien); QueryResult result = null; int rowNumber = 0; if (selectedId != null) { SessionFactory factory = FLRSessionFactory.getFactory(); Session session = null; try { session = factory.openSession(); String queryString = "select " + FLR_KONTOLAND + FinanzFac.FLR_KONTOLAND_FLRKONTOUEBERSETZT + "." + FinanzFac.FLR_KONTO_C_NR + FLR_KONTOLAND_FROM_CLAUSE + this.buildWhereClause() + this.buildOrderByClause(); Query query = session.createQuery(queryString); ScrollableResults scrollableResult = query.scroll(); if (scrollableResult != null) { scrollableResult.beforeFirst(); while (scrollableResult.next()) { String id = (String) scrollableResult.getString(0); if (selectedId.equals(id)) { rowNumber = scrollableResult.getRowNumber(); break; } } } } catch (Exception e) { throw new EJBExceptionLP(EJBExceptionLP.FEHLER_FLR, e); } finally { try { session.close(); } catch (HibernateException he) { throw new EJBExceptionLP(EJBExceptionLP.FEHLER, he); } } } if (rowNumber < 0 || rowNumber >= this.getRowCount()) { rowNumber = 0; } result = this.getPageAt(new Integer(rowNumber)); result.setIndexOfSelectedRow(rowNumber); return result; } }