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.bestellung.fastlanereader; import java.math.BigDecimal; import java.util.Iterator; import java.util.List; import java.util.Locale; import org.hibernate.Query; import org.hibernate.ScrollableResults; import org.hibernate.Session; import org.hibernate.SessionFactory; import com.lp.server.bestellung.fastlanereader.generated.FLRWareneingang; import com.lp.server.bestellung.service.WareneingangFac; 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.QueryParameters; 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; public class NichtMehrBenoetigteBestellungenHandler extends UseCaseHandler { /** * the size of the data page returned in QueryResult. */ /** * The information needed for the Bestellung table. */ /** * */ private static final long serialVersionUID = 1L; /** * gets the data page for the specified row using the current query. The row * at rowIndex will be located in the middle of the page. * * @see UseCaseHandler#getPageAt(java.lang.Integer) * @param rowIndex * Integer * @throws EJBExceptionLP * @return QueryResult */ public QueryResult getPageAt(Integer rowIndex) throws EJBExceptionLP { final String METHOD_NAME = "getPageAt"; QueryResult result = null; SessionFactory factory = FLRSessionFactory.getFactory(); Session session = null; try { int colCount = getTableInfo().getColumnClasses().length; int pageSize = BestellungwareneingangHandler.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()) { FLRWareneingang wareneingang = (FLRWareneingang) resultListIterator.next(); rows[row][col++] = wareneingang.getI_id(); rows[row][col++] = wareneingang.getC_lieferscheinnr(); rows[row][col++] = wareneingang.getT_lieferscheindatum(); rows[row][col++] = wareneingang.getN_transportkosten(); rows[row][col++] = wareneingang.getF_gemeinkostenfaktor(); rows[row][col++] = wareneingang.getT_wareneingansdatum(); row++; col = 0; } result = new QueryResult(rows, this.getRowCount(), startIndex, endIndex, 0); } catch (Exception e) { throw new EJBExceptionLP(EJBExceptionLP.FEHLER_FLR, e); } finally { closeSession(session); } return result; } /** * gets the total number of rows represented by the current query. * * @see UseCaseHandler#getRowCountFromDataBase() * @return int */ 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 { closeSession(session); } return rowCount; } /** * builds the where clause of the HQL (Hibernate Query Language) statement * using the current query. * * @return the HQL where clause. */ 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(" wareneingang." + filterKriterien[i].kritName); where.append(" " + filterKriterien[i].operator); where.append(" " + filterKriterien[i].value); } } if (filterAdded) { where.insert(0, " WHERE"); } } return where.toString(); } /** * builds the HQL (Hibernate Query Language) order by clause using the sort * criterias contained in the current query. * * @return the HQL order by clause. */ 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("wareneingang." + kriterien[i].kritName); orderBy.append(" "); orderBy.append(kriterien[i].value); } } } else { // no sort criteria found, add default sort if (sortAdded) { orderBy.append(", "); } orderBy.append("wareneingang.").append(WareneingangFac.FLR_WE_I_SORT) // vorher wurde nach i_id // geordnet .append(" ASC "); sortAdded = true; } if (orderBy.indexOf("wareneingang." + WareneingangFac.FLR_WE_I_SORT) < 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(" wareneingang.").append(WareneingangFac.FLR_WE_I_SORT).append(" "); sortAdded = true; } if (sortAdded) { orderBy.insert(0, " ORDER BY "); } } return orderBy.toString(); } /** * get the basic from clause for the HQL statement. * * @return the from clause. */ private String getFromClause() { return "from FLRWareneingang wareneingang "; } /** * sorts the data described by the current query using the specified sort * criterias. The current query is also updated with the new sort criterias. * * @see UseCaseHandler#sort(SortierKriterium[], Object) * @throws EJBExceptionLP * @param sortierKriterien * SortierKriterium[] * @param selectedId * Object * @return QueryResult */ public QueryResult sort(SortierKriterium[] sortierKriterien, Object selectedId) throws EJBExceptionLP { final String METHOD_NAME = "sort"; this.getQuery().setSortKrit(sortierKriterien); QueryResult result = null; int rowNumber = 0; if (selectedId != null && ((Integer) selectedId).intValue() >= 0) { SessionFactory factory = FLRSessionFactory.getFactory(); Session session = null; try { session = factory.openSession(); String queryString = "select wareneingang." + "i_id" + " from FLRWareneingang wareneingang " + this.buildWhereClause() + this.buildOrderByClause(); Query query = session.createQuery(queryString); ScrollableResults scrollableResult = query.scroll(); if (scrollableResult != null) { scrollableResult.beforeFirst(); while (scrollableResult.next()) { Integer id = (Integer) scrollableResult.getInteger(0); if (selectedId.equals(id)) { rowNumber = scrollableResult.getRowNumber(); break; } } } } catch (Exception e) { throw new EJBExceptionLP(EJBExceptionLP.FEHLER, e); } finally { closeSession(session); } } if (rowNumber < 0 || rowNumber >= this.getRowCount()) { rowNumber = 0; } result = this.getPageAt(new Integer(rowNumber)); result.setIndexOfSelectedRow(rowNumber); return result; } /** * gets information about the Bestellungstable. * * @return TableInfo */ public TableInfo getTableInfo() { if (super.getTableInfo() == null) { String mandantCNr = theClientDto.getMandant(); Locale locUI = theClientDto.getLocUi(); setTableInfo(new TableInfo(new Class[] { Integer.class, String.class, java.util.Date.class, BigDecimal.class, Double.class, java.util.Date.class, }, new String[] { "i_id", getTextRespectUISpr("bes.lieferscheinnr", mandantCNr, locUI), getTextRespectUISpr("bes.lfdatum", mandantCNr, locUI), getTextRespectUISpr("bes.transportkosten", mandantCNr, locUI), getTextRespectUISpr("bes.gemeinkostenfaktor", mandantCNr, locUI), getTextRespectUISpr("bes.wedatum", mandantCNr, locUI) }, new int[] { -1, // id QueryParameters.FLR_BREITE_SHARE_WITH_REST, QueryParameters.FLR_BREITE_XM, QueryParameters.FLR_BREITE_PREIS, QueryParameters.FLR_BREITE_PREIS, QueryParameters.FLR_BREITE_XM, }, new String[] { "i_id", WareneingangFac.FLR_WE_C_LIEFERSCHEIN, WareneingangFac.FLR_WE_T_LIEFERSCHEINDATUM, WareneingangFac.FLR_WE_N_TRANSPORTKOSTEN, WareneingangFac.FLR_WE_F_GEMEINKOSTENFAKTOR, WareneingangFac.FLR_WE_T_WARENEINGANGSDATUM })); } return super.getTableInfo(); } }