Java tutorial
/* * Copyright (C) July 2014 Rafael Aznar * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * 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 General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ package com.goplace.service.generic.implementation; import com.google.gson.Gson; import com.google.gson.GsonBuilder; import java.lang.reflect.Constructor; import java.sql.Connection; import java.util.ArrayList; import com.goplace.dao.generic.implementation.TableDaoGenImpl; import com.goplace.helper.ExceptionBooster; import com.goplace.service.publicinterface.MetaServiceInterface; public abstract class MetaServiceGenImpl implements MetaServiceInterface { protected Connection oConnection = null; protected String strObjectName = null; protected String strPojo = null; public MetaServiceGenImpl(String ob, String pojo, Connection con) { strObjectName = Character.toUpperCase(ob.charAt(0)) + ob.substring(1); oConnection = con; strPojo = Character.toUpperCase(pojo.charAt(0)) + pojo.substring(1); } @Override public void setSource(String source) throws Exception { strObjectName = source; } @Override public void setPojo(String pojo) throws Exception { strPojo = Character.toUpperCase(pojo.charAt(0)) + pojo.substring(1); } @Override public String getPrettyColumns() throws Exception { String data = null; try { oConnection.setAutoCommit(false); Constructor c = Class .forName("com.goplace.dao.generic.specific.implementation." + strPojo + "DaoGenSpImpl") .getConstructor(String.class, Connection.class); TableDaoGenImpl oDao = (TableDaoGenImpl) c.newInstance(strObjectName, oConnection); ArrayList<String> alColumns = null; alColumns = oDao.getPrettyColumnsNames(); GsonBuilder gsonBuilder = new GsonBuilder(); Gson gson = gsonBuilder.create(); data = gson.toJson(alColumns); } catch (Exception ex) { oConnection.rollback(); ExceptionBooster.boost( new Exception(this.getClass().getName() + ":getPrettyColumns ERROR: " + ex.getMessage())); } finally { oConnection.commit(); } return data; } @Override public String getColumns() throws Exception { String data = null; try { oConnection.setAutoCommit(false); Constructor c = Class .forName("com.goplace.dao.generic.specific.implementation." + strPojo + "DaoGenSpImpl") .getConstructor(String.class, Connection.class); TableDaoGenImpl oDao = (TableDaoGenImpl) c.newInstance(strObjectName, oConnection); ArrayList<String> alColumns = null; alColumns = oDao.getColumnsNames(); GsonBuilder gsonBuilder = new GsonBuilder(); Gson gson = gsonBuilder.create(); data = gson.toJson(alColumns); } catch (Exception ex) { oConnection.rollback(); ExceptionBooster .boost(new Exception(this.getClass().getName() + ":getColumns ERROR: " + ex.getMessage())); } finally { oConnection.commit(); } return data; } }