ChoiceDAO.java

/*
*
* Copyright 2013 Entando S.r.l. (http://www.entando.com) All rights reserved.
*
* This file is part of Entando software. 
* Entando is a free software; 
* You can redistribute it and/or modify it
* under the terms of the GNU General Public License (GPL) as published by the Free Software Foundation; version 2.
* 
* See the file License for the specific language governing permissions   
* and limitations under the License
* 
* 
* 
* Copyright 2013 Entando S.r.l. (http://www.entando.com) All rights reserved.
*
*/
package com.agiletec.plugins.jpsurvey.aps.system.services.survey;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;

import java.util.List;

import com.agiletec.aps.util.ApsProperties;
import com.agiletec.plugins.jpsurvey.aps.system.services.AbstractSurveyDAO;
import com.agiletec.plugins.jpsurvey.aps.system.services.survey.model.Choice;

public class ChoiceDAO extends AbstractSurveyDAO implements IChoiceDAO {
	
	@Override
	public Choice loadChoice(int id) {
		Choice choice = null;
		Connection conn = null;
		PreparedStatement stat = null;
		ResultSet res = null;
		try {
			conn = this.getConnection();
			stat = conn.prepareStatement(GET_CHOICE_BY_ID);
			stat.setInt(1, id);
			res = stat.executeQuery();
			if (res.next()) {
				choice = this.buildChoiceRecordFromResultSet(res, 1);
				// process get extra info
				int surveyId = res.getInt(6);
				boolean questionnaire = res.getInt(7) == 1 ? true:false;
				ApsProperties surveyTitle = new ApsProperties();
				surveyTitle.loadFromXml(res.getString(8));
				ApsProperties questionTitle = new ApsProperties();
				questionTitle.loadFromXml(res.getString(9));
				choice.setExtraInfo(surveyId, questionnaire, surveyTitle, questionTitle);
			}
		} catch (Throwable t) {
			processDaoException(t, "Error while loading the choice of ID "+id, "loadChoice");
		} finally {
			closeDaoResources(res, stat, conn);
		}
//		if (null != choice) this.loadChoiceExtraInformations(conn, choice);
		return choice;
	}
	
	@Override
	public void saveChoice(Choice choice) {
		Connection conn = null;
		if (null == choice) return;
		try {
			conn = this.getConnection();
			saveChoice(conn, choice);
		} catch (Throwable t) {
			processDaoException(t, "Error while saving the 'choice' ID "+choice.getId(), "saveChoice");
		} finally {
			closeConnection(conn);
		}
	}
	
	@Override
	public void saveChoiceInSortedPosition(Choice choice) {
		Connection conn = null;
		PreparedStatement stat = null;
		ResultSet res = null;
		try {
			conn = this.getConnection();
			conn.setAutoCommit(false);
			stat = conn.prepareStatement(GET_CHOICE_GREATER_POS);
			stat.setInt(1, choice.getQuestionId());
			res = stat.executeQuery();
			if (res.next()) {
				int lastPosition = res.getInt(1);
				choice.setPos(++lastPosition);
			} else {
				choice.setPos(0);
			}
			this.saveChoice(conn, choice);
			conn.commit();
		} catch (Throwable t) {
			this.executeRollback(conn);
			processDaoException(t, "Error while saving the choice ID "+choice.getId()+" in the proper position "+choice.getPos(), "saveChoiceInSortedPosition");
		} finally {
			closeDaoResources(res, stat, conn);
		}
	}
	
	@Override
	public void deleteChoice(int id) {
		Connection conn = null;
		try {
			conn = this.getConnection();
			this.deleteChoice(conn,id);
		} catch (Throwable t) {
			processDaoException(t, "Error while deleting the 'choice' ID "+id, "deleteChoice");
		} finally {
			closeConnection(conn);
		}
	}
	
	@Override
	public void deleteChoiceByQuestionId(int id) {
		Connection conn = null;
		try {
			conn = this.getConnection();
			this.deleteChoiceByQuestionId(conn, id);
		} catch (Throwable t) {
			processDaoException(t, "Error while deleting choices by question ID ", "deleteChoiceByQuestionId");
		} finally {
			closeConnection(conn);
		}
	}
	
	@Override
	public void updateChoice(Choice choice) {
		Connection conn = null;
		try {
			conn = this.getConnection();
			this.updateChoice(conn, choice);
		} catch (Throwable t) {
			processDaoException(t, "Error while updating a 'choice' ", "updateChoice");
		} finally {
			closeConnection(conn);
		}
	}
	
	@Override
	public void swapChoicePosition(Choice choiceToSwap, List<Choice> choices, boolean up) {
		Connection conn = null;
		Choice nearChoiceToSwap = null;
		try {
			for (int i = 0; i < choices.size(); i++) {
				Choice choice = choices.get(i);
				if (choice.getId() == choiceToSwap.getId()) {
					if (up && i>0) {
						nearChoiceToSwap = choices.get(i-1);
					} else if (!up && i<(choices.size()-1)) {
						nearChoiceToSwap = choices.get(i+1);
					}
					break;
				}
			}
			if (null == nearChoiceToSwap) {
				return;
			}
			conn = this.getConnection();
			conn.setAutoCommit(false);
			int initPos = choiceToSwap.getPos();
			choiceToSwap.setPos(nearChoiceToSwap.getPos());
			nearChoiceToSwap.setPos(initPos);
			this.updateChoicePosition(conn, nearChoiceToSwap);
			this.updateChoicePosition(conn, choiceToSwap);
			conn.commit();
		} catch (Throwable t) {
			this.executeRollback(conn);
			processDaoException(t, "Errore swapping position of two 'choice' objects", "changeQuestionPosition");
		} finally {
			closeConnection(conn);
		}
	}
	
	private void updateChoicePosition(Connection conn, Choice choiceToMove) {
		PreparedStatement stat = null;
		try {
			stat = conn.prepareStatement(MOVE_CHOICE);
			stat.setInt(1, choiceToMove.getPos());
			stat.setInt(2, choiceToMove.getId());
			stat.executeUpdate();
		} catch (Throwable t) {
			this.executeRollback(conn);
			processDaoException(t, "Error while updating the position of question", "updateChoicePosition");
		} finally {
			closeDaoResources(null, stat);
		}
	}
	
	private static final String GET_CHOICE_BY_ID = // THE SMART WAY
		"SELECT " +
		// choices 1 - 5
			"jpsurvey_choices.id, questionid, choice, jpsurvey_choices.pos, freetext, " +
		// extra info 6 - 9
			"jpsurvey.id, jpsurvey.questionnaire, jpsurvey.title, jpsurvey_questions.question "+
		"FROM jpsurvey " +
			"LEFT JOIN jpsurvey_questions ON jpsurvey.id = jpsurvey_questions.surveyid "+
			"LEFT JOIN jpsurvey_choices ON jpsurvey_questions.id = jpsurvey_choices.questionid "+
		"WHERE jpsurvey_choices.id = ? ";
	
	private static final String GET_CHOICE_GREATER_POS =
		"SELECT pos FROM jpsurvey_choices WHERE questionid = ? ORDER BY pos DESC";
	
	private static final String GET_CHOICE_LESSER_THAN =
		"SELECT id, questionid, choice, pos, freetext FROM jpsurvey_choices WHERE questionid = ? AND pos < ? ORDER BY pos DESC";

	private static final String GET_CHOICE_GREATER_THAN =
		"SELECT id, questionid, choice, pos, freetext FROM jpsurvey_choices WHERE questionid = ? AND pos > ? ORDER BY pos ASC";
	
	private static final String MOVE_CHOICE = 
		"UPDATE jpsurvey_choices SET pos = ? WHERE id = ? ";
	
}