com.lp.server.system.fastlanereader.EinheitHandler.java Source code

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/*******************************************************************************
 * 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.system.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.system.fastlanereader.generated.FLREinheit;
import com.lp.server.system.fastlanereader.generated.FLREinheitspr;
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;
import com.lp.util.Helper;

public class EinheitHandler extends UseCaseHandler {

    /**
     * 
     */
    private static final long serialVersionUID = 1L;

    /**
     * getPageAt
     * 
     * @param rowIndex
     *            Integer
     * @return QueryResult
     */
    public QueryResult getPageAt(Integer rowIndex) {

        QueryResult result = null;
        SessionFactory factory = FLRSessionFactory.getFactory();
        Session session = null;
        try {
            int colCount = getTableInfo().getColumnClasses().length;
            int pageSize = StatusHandler.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);
            session = setFilter(session);

            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;

            String sLocUI = Helper.locale2String(theClientDto.getLocUi());

            while (resultListIterator.hasNext()) {
                Object o[] = (Object[]) resultListIterator.next();
                FLREinheit einheit = (FLREinheit) o[0];
                rows[row][col++] = einheit.getC_nr();
                rows[row][col++] = einheit.getC_nr();
                // Uebersetzung finden
                Iterator<?> sprsetIterator = einheit.getEinheit_einheit_set().iterator();
                rows[row][col++] = findSpr(sLocUI, sprsetIterator);
                rows[row][col++] = einheit.getI_dimension();

                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_FLR, he);
            }
        }
        return result;
    }

    private String findSpr(String sLocaleI, Iterator<?> iterUebersetzungenI) {

        String sUebersetzung = null;
        while (iterUebersetzungenI.hasNext()) {
            FLREinheitspr einheitspr = (FLREinheitspr) iterUebersetzungenI.next();
            if (einheitspr.getLocale().getC_nr().compareTo(sLocaleI) == 0) {
                sUebersetzung = einheitspr.getC_bez();
                break;
            }
        }
        return sUebersetzung;
    }

    /**
     * buildOrderByClause
     * 
     * @return String
     */
    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(kriterien[i].kritName);
                        orderBy.append(" ");
                        orderBy.append(kriterien[i].value);
                    }
                }
            } else {
                // no sort criteria found, add default sort
                if (sortAdded) {
                    orderBy.append(", ");
                }
                orderBy.append("einheit.c_nr ASC ");

                sortAdded = true;
            }
            if (orderBy.indexOf("einheit.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(" einheit.c_nr ");
                sortAdded = true;
            }
            if (sortAdded) {
                orderBy.insert(0, " ORDER BY ");
            }
        }
        return orderBy.toString();

    }

    /**
     * buildWhereClause
     * 
     * @return String
     */
    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(" einheit." + filterKriterien[i].kritName);
                    where.append(" " + filterKriterien[i].operator);
                    where.append(" " + filterKriterien[i].value);
                }
            }
            if (filterAdded) {
                where.insert(0, " WHERE");
            }
        }

        return where.toString();
    }

    /**
     * getFromClause
     * 
     * @return String
     */
    private String getFromClause() {
        return " FROM FLREinheit AS einheit" + " LEFT JOIN einheit.einheit_einheit_set AS einheit_einheit_set";
    }

    /**
     * getRowCountFromDataBase
     * 
     * @return int
     */
    protected long getRowCountFromDataBase() {
        long rowCount = 0;
        SessionFactory factory = FLRSessionFactory.getFactory();
        Session session = null;
        try {
            session = factory.openSession();
            session = setFilter(session);
            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;
    }

    /**
     * getTableInfo
     * 
     * @return TableInfo
     */
    public TableInfo getTableInfo() {

        if (super.getTableInfo() == null) {
            String mandantCNr = theClientDto.getMandant();
            Locale locUI = theClientDto.getLocUi();
            setTableInfo(new TableInfo(new Class[] { String.class, String.class, String.class, Integer.class },
                    new String[] { "c_nr", getTextRespectUISpr("lp.kennung", mandantCNr, locUI),
                            getTextRespectUISpr("lp.bezeichnung", mandantCNr, locUI),
                            getTextRespectUISpr("lp.dimension", mandantCNr, locUI),

                    }, new int[] { QueryParameters.FLR_BREITE_M, // c_nr
                            QueryParameters.FLR_BREITE_M, QueryParameters.FLR_BREITE_SHARE_WITH_REST,
                            QueryParameters.FLR_BREITE_M },

                    new String[] { "einheit.c_nr", "einheit.c_nr", "einheit.einheit_einheit_set.c_bez",
                            "einheit.i_dimension" }));

        }
        return super.getTableInfo();
    }

    /**
     * sort
     * 
     * @param sortierKriterien
     *            SortierKriterium[]
     * @param selectedId
     *            Object
     * @return QueryResult
     */
    public QueryResult sort(SortierKriterium[] sortierKriterien, Object selectedId) {

        this.getQuery().setSortKrit(sortierKriterien);

        QueryResult result = null;
        int rowNumber = 0;

        // flrstringkey: 0
        if (selectedId != null) {
            SessionFactory factory = FLRSessionFactory.getFactory();
            Session session = null;

            try {
                session = factory.openSession();
                session = setFilter(session);
                // flrstringkey: 2
                String queryString = getFromClause() + buildWhereClause() + buildOrderByClause();

                Query query = session.createQuery(queryString);
                ScrollableResults scrollableResult = query.scroll();
                boolean idFound = false;
                if (scrollableResult != null) {
                    scrollableResult.beforeFirst();
                    while (scrollableResult.next()) {
                        // flrstringkey: 1
                        FLREinheit einheit = (FLREinheit) scrollableResult.get(0);
                        String iId = einheit.getC_nr();
                        if (selectedId.equals(iId)) {
                            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_FLR, he);
                }
            }
        }

        if (rowNumber < 0 || rowNumber >= this.getRowCount()) {
            rowNumber = 0;
        }

        result = this.getPageAt(new Integer(rowNumber));
        result.setIndexOfSelectedRow(rowNumber);

        return result;
    }
}