Java tutorial
/* * Copyright (C) 2011 - 2016 DVCONSULTORES Este programa es software libre: usted puede redistribuirlo y/o modificarlo bajo los terminos de la Licencia Pblica General GNU publicada por la Fundacion para el Software Libre, ya sea la version 3 de la Licencia, o (a su eleccion) cualquier version posterior. Este programa se distribuye con la esperanza de que sea til, pero SIN GARANTiA ALGUNA; ni siquiera la garantia implicita MERCANTIL o de APTITUD PARA UN PROPoSITO DETERMINADO. Consulte los detalles de la Licencia Pblica General GNU para obtener una informacion mas detallada. Deberia haber recibido una copia de la Licencia Pblica General GNU junto a este programa. En caso contrario, consulte <http://www.gnu.org/licenses/>. */ package org.openbizview.util; /* * To change this template, choose Tools | Templates * and open the template in the editor. */ import java.io.IOException; import java.io.Serializable; import java.sql.*; import java.util.ArrayList; import java.util.Iterator; import java.util.List; import java.util.Map; import javax.annotation.PostConstruct; import javax.faces.application.FacesMessage; import javax.faces.bean.ManagedBean; import javax.faces.bean.ViewScoped; import javax.faces.context.FacesContext; import javax.naming.Context; import javax.naming.InitialContext; import javax.naming.NamingException; import javax.servlet.http.HttpServletRequest; import javax.sql.DataSource; import org.apache.commons.lang3.StringUtils; import org.openbizview.util.PntGenerica; import org.primefaces.context.RequestContext; import org.primefaces.model.LazyDataModel; import org.primefaces.model.SortOrder; /** * * @author Andres */ @ManagedBean @ViewScoped public class Bvtcat1 extends Bd implements Serializable { /** * */ private static final long serialVersionUID = 1L; private LazyDataModel<Bvtcat1> lazyModel; /** * @return the lazyModel */ public LazyDataModel<Bvtcat1> getLazyModel() { return lazyModel; } @PostConstruct public void init() { if (instancia == null) { instancia = "99999"; } //Si no tiene acceso al mdulo no puede ingresar if (new SeguridadMenuBean().opcmnu("M02") == "false") { RequestContext.getCurrentInstance().execute("PF('idleDialogNP').show()"); } lazyModel = new LazyDataModel<Bvtcat1>() { /** * */ private static final long serialVersionUID = 7217573531435419432L; @Override public List<Bvtcat1> load(int first, int pageSize, String sortField, SortOrder sortOrder, Map<String, Object> filters) { //Filtro if (filters != null) { for (Iterator<String> it = filters.keySet().iterator(); it.hasNext();) { String filterProperty = it.next(); // table column name = field name filterValue = filters.get(filterProperty); } } try { //Consulta select(first, pageSize, sortField, filterValue); //Counter counter(filterValue); //Contador lazy lazyModel.setRowCount(rows); //Necesario para crear la paginacin } catch (SQLException | NamingException | ClassNotFoundException e) { e.printStackTrace(); } return list; } //Arregla bug de primefaces @Override /** * Arregla el Issue 1544 de primefaces lazy loading porge generaba un error * de divisor equal a cero, es solamente un override */ public void setRowIndex(int rowIndex) { /* * The following is in ancestor (LazyDataModel): * this.rowIndex = rowIndex == -1 ? rowIndex : (rowIndex % pageSize); */ if (rowIndex == -1 || getPageSize() == 0) { super.setRowIndex(-1); } else super.setRowIndex(rowIndex % getPageSize()); } }; } private String codcat1 = ""; private String descat1 = ""; private Object filterValue = ""; private List<Bvtcat1> list = new ArrayList<Bvtcat1>(); private int validarOperacion = 0; private String instancia = (String) FacesContext.getCurrentInstance().getExternalContext().getSessionMap() .get("instancia"); //Usuario logeado /** * @return the codcat1 */ public String getcodcat1() { return codcat1; } /** * @param codcat1 the codcat to set */ public void setcodcat1(String codcat1) { this.codcat1 = codcat1; } /** * @return the descat1 */ public String getDescat1() { return descat1; } /** * @param descat1 the descat1 to set */ public void setDescat1(String descat1) { this.descat1 = descat1; } /** * @return the validarOperacion */ public int getValidarOperacion() { return validarOperacion; } /** * @param validarOperacion the validarOperacion to set */ public void setValidarOperacion(int validarOperacion) { this.validarOperacion = validarOperacion; } /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// //Variables seran utilizadas para capturar mensajes de errores de Oracle y parametros de metodos FacesMessage msj = null; PntGenerica consulta = new PntGenerica(); boolean vGacc; //Validador de opciones del men private int rows; //Registros de tabla private String login = (String) FacesContext.getCurrentInstance().getExternalContext().getSessionMap() .get("usuario"); //Usuario logeado /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// //Coneccion a base de datos //Pool de conecciones JNDI Connection con; PreparedStatement pstmt = null; ResultSet r; /** * Inserta categoria1. * <p> * <b>Parametros del Metodo:<b> String codcat1, String descat1 unidos como un solo string.<br> * String pool, String login.<br><br> **/ public void insert() throws NamingException { try { Context initContext = new InitialContext(); DataSource ds = (DataSource) initContext.lookup(JNDI); con = ds.getConnection(); String query = "INSERT INTO Bvtcat1 VALUES (?,?,?,'" + getFecha() + "',?,'" + getFecha() + "',?)"; pstmt = con.prepareStatement(query); pstmt.setString(1, codcat1.toUpperCase()); pstmt.setString(2, descat1.toUpperCase()); pstmt.setString(3, login); pstmt.setString(4, login); pstmt.setInt(5, Integer.parseInt(instancia)); try { //Avisando pstmt.executeUpdate(); msj = new FacesMessage(FacesMessage.SEVERITY_INFO, getMessage("msnInsert"), ""); limpiarValores(); } catch (SQLException e) { msj = new FacesMessage(FacesMessage.SEVERITY_FATAL, e.getMessage(), ""); } pstmt.close(); con.close(); } catch (Exception e) { e.printStackTrace(); } FacesContext.getCurrentInstance().addMessage(null, msj); } public void delete() throws NamingException { HttpServletRequest request = (HttpServletRequest) FacesContext.getCurrentInstance().getExternalContext() .getRequest(); String[] chkbox = request.getParameterValues("toDelete"); if (chkbox == null) { msj = new FacesMessage(FacesMessage.SEVERITY_WARN, getMessage("del"), ""); } else { try { Context initContext = new InitialContext(); DataSource ds = (DataSource) initContext.lookup(JNDI); con = ds.getConnection(); String param = "'" + StringUtils.join(chkbox, "','") + "'"; String query = "DELETE from Bvtcat1 WHERE codcat1 in (" + param + ") and instancia = '" + instancia + "'"; pstmt = con.prepareStatement(query); ////System.out.println(query); try { //Avisando pstmt.executeUpdate(); msj = new FacesMessage(FacesMessage.SEVERITY_INFO, getMessage("msnDelete"), ""); limpiarValores(); } catch (SQLException e) { e.printStackTrace(); msj = new FacesMessage(FacesMessage.SEVERITY_FATAL, e.getMessage(), ""); } pstmt.close(); con.close(); } catch (Exception e) { e.printStackTrace(); } } FacesContext.getCurrentInstance().addMessage(null, msj); } /** * Actualiza categoria1 * <b>Parametros del Metodo:<b> String codcat1, String descat1 unidos como un solo string.<br> * String pool, String login.<br><br> **/ public void update() throws NamingException { try { Context initContext = new InitialContext(); DataSource ds = (DataSource) initContext.lookup(JNDI); con = ds.getConnection(); String query = "UPDATE Bvtcat1"; query += " SET descat1 = ?, usract = ?, fecact='" + getFecha() + "'"; query += " WHERE codcat1 = ? and instancia = '" + instancia + "'"; // //System.out.println(query); pstmt = con.prepareStatement(query); pstmt.setString(1, descat1.toUpperCase()); pstmt.setString(2, login); pstmt.setString(3, codcat1.toUpperCase()); // Antes de ejecutar valida si existe el registro en la base de Datos. try { //Avisando pstmt.executeUpdate(); if (pstmt.getUpdateCount() == 0) { msj = new FacesMessage(FacesMessage.SEVERITY_ERROR, getMessage("msnNoUpdate"), ""); } else { msj = new FacesMessage(FacesMessage.SEVERITY_INFO, getMessage("msnUpdate"), ""); } descat1 = ""; validarOperacion = 0; } catch (SQLException e) { msj = new FacesMessage(FacesMessage.SEVERITY_INFO, e.getMessage(), ""); } pstmt.close(); con.close(); } catch (Exception e) { } FacesContext.getCurrentInstance().addMessage(null, msj); } public void guardar() throws NamingException, SQLException { if (validarOperacion == 0) { insert(); } else { update(); } } /** * Leer Datos de paises * @throws NamingException * @throws IOException **/ public void select(int first, int pageSize, String sortField, Object filterValue) throws SQLException, ClassNotFoundException, NamingException { Context initContext = new InitialContext(); DataSource ds = (DataSource) initContext.lookup(JNDI); con = ds.getConnection(); //Reconoce la base de datos de coneccin para ejecutar el query correspondiente a cada uno DatabaseMetaData databaseMetaData = con.getMetaData(); productName = databaseMetaData.getDatabaseProductName();//Identifica la base de datos de coneccin String query = ""; switch (productName) { case "Oracle": query += " select * from "; query += " ( select query.*, rownum as rn from"; query += " (SELECT trim(codcat1), trim(descat1)"; query += " FROM BVTcat1"; query += " WHERE codcat1||descat1 like '%" + ((String) filterValue).toUpperCase() + "%'"; query += " and codcat1 like '%" + codcat1.toUpperCase() + "%'"; query += " AND instancia = '" + instancia + "'"; query += " order by " + sortField + ") query"; query += " ) where rownum <= " + pageSize; query += " and rn > (" + first + ")"; break; case "PostgreSQL": query += " SELECT trim(codcat1), trim(descat1) "; query += " FROM BVTcat1"; query += " WHERE codcat1||descat1 like '%" + ((String) filterValue).toUpperCase() + "%'"; query += " and codcat1 like '%" + codcat1.toUpperCase() + "%'"; query += " AND instancia = '" + instancia + "'"; query += " order by " + sortField; query += " LIMIT " + pageSize; query += " OFFSET " + first; break; case "Microsoft SQL Server": query += " SELECT * "; query += " FROM (SELECT "; query += " ROW_NUMBER() OVER (ORDER BY CODCAT1 ASC) AS ROW_NUM, "; query += " CODCAT1, "; query += " DESCAT1 "; query += " FROM BVTCAT1) TOT "; query += " WHERE "; query += " TOT.CODCAT1 + TOT.DESCAT1 LIKE '%" + ((String) filterValue).toUpperCase() + "%'"; query += " AND TOT.CODCAT1 LIKE '%" + codcat1.toUpperCase() + "%'"; query += " AND tot.instancia = '" + instancia + "'"; query += " AND TOT.ROW_NUM <= " + pageSize; query += " AND TOT.ROW_NUM > " + first; query += " ORDER BY " + sortField; break; } pstmt = con.prepareStatement(query); //System.out.println(query); r = pstmt.executeQuery(); while (r.next()) { Bvtcat1 select = new Bvtcat1(); select.setcodcat1(r.getString(1)); select.setDescat1(r.getString(2)); //Agrega la lista list.add(select); } //Cierra las conecciones pstmt.close(); con.close(); } /** * Leer registros en la tabla * @throws NamingException * @throws IOException **/ public void counter(Object filterValue) throws SQLException, NamingException { try { Context initContext = new InitialContext(); DataSource ds = (DataSource) initContext.lookup(JNDI); con = ds.getConnection(); //Reconoce la base de datos de coneccin para ejecutar el query correspondiente a cada uno DatabaseMetaData databaseMetaData = con.getMetaData(); productName = databaseMetaData.getDatabaseProductName();//Identifica la base de datos de coneccin String query = ""; switch (productName) { case "Oracle": query = "SELECT count_bvtcat1('" + ((String) filterValue).toUpperCase() + "','" + instancia + "') from dual"; break; case "PostgreSQL": query = "SELECT count_bvtcat1('" + ((String) filterValue).toUpperCase() + "','" + instancia + "')"; break; case "Microsoft SQL Server": query = "SELECT DBO.count_bvtcat1('" + ((String) filterValue).toUpperCase() + "','" + instancia + "')"; break; } pstmt = con.prepareStatement(query); //System.out.println(query); r = pstmt.executeQuery(); while (r.next()) { rows = r.getInt(1); } } catch (SQLException e) { e.printStackTrace(); } //Cierra las conecciones pstmt.close(); con.close(); r.close(); } /** * @return the rows */ public int getRows() { return rows; } private void limpiarValores() { // TODO Auto-generated method stub codcat1 = ""; descat1 = ""; validarOperacion = 0; } }