ca.upei.ic.timetable.client.FindCourseViewController.java Source code

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Here is the source code for ca.upei.ic.timetable.client.FindCourseViewController.java

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/*
 *  Copyright 2008 University of Prince Edward Island
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package ca.upei.ic.timetable.client;

import java.util.Map;

import com.google.gwt.http.client.Request;
import com.google.gwt.http.client.RequestCallback;
import com.google.gwt.http.client.Response;
import com.google.gwt.json.client.JSONParser;
import com.google.gwt.json.client.JSONValue;
import com.google.gwt.user.client.ui.Widget;

/**
 * Find Course controller
 * 
 * Controller for find a course.
 * 
 * @author felix
 *
 */
public class FindCourseViewController implements ViewController {

    private ApplicationController app_;
    private FindCourseView view_;
    private final DepartmentModelView department_;
    private final LevelModelView level_;
    private final SemesterModelView semester_;
    private final CourseStartTimeModelView startTime_;
    private boolean departmentLoaded_ = false;
    private boolean levelLoaded_ = false;
    private boolean semesterLoaded_ = false;

    /**
     * Initialize find course dialog
     */
    public FindCourseViewController(ApplicationController app) {
        this.app_ = app;
        department_ = new DepartmentModelView(this);
        level_ = new LevelModelView(this);
        semester_ = new SemesterModelView(this);
        startTime_ = new CourseStartTimeModelView(this);

        //      app_.getCourseCalendarController().setCellClickListener(new CellClickListener() {
        //         
        //         private Map<String,Integer> params;
        //         
        //         public void setContext(Object context) {
        //            params = (Map<String,Integer>) context;
        //         }
        //
        //         public void onClick(Widget sender) {
        //            startTime_.setDay(params.get("day") + 1);
        //            startTime_.setHour(params.get("hour") + 1);
        //            app_.getFindCourseController().getView().show();
        //         }
        //         
        //      });
    }

    /**
     * Get the department model
     * 
     * @return the department model
     */
    public DepartmentModelView getDepartmentModel() {
        if (!departmentLoaded_) {
            Service.defaultInstance().askDepartments(new RequestCallback() {

                public void onError(Request request, Throwable exception) {
                    app_.error(ApplicationController.OOPS, exception);
                }

                public void onResponseReceived(Request request, Response response) {
                    JSONValue value = JSONParser.parse(response.getText());
                    department_.loadJSON(value);
                    departmentLoaded_ = true;
                }

            });
        }

        return department_;
    }

    /**
     * Get the level model
     * 
     * @return the level model
     */
    public LevelModelView getLevelModel() {
        if (!levelLoaded_) {
            Service.defaultInstance().askCourseLevels(new RequestCallback() {

                public void onError(Request request, Throwable exception) {
                    app_.error(ApplicationController.OOPS, exception);
                }

                public void onResponseReceived(Request request, Response response) {
                    JSONValue value = JSONParser.parse(response.getText());
                    level_.loadJSON(value);
                    levelLoaded_ = true;
                }

            });
        }

        return level_;
    }

    public SemesterModelView getSemesterModel() {
        if (!semesterLoaded_) {
            Service.defaultInstance().askSemesters(new RequestCallback() {

                public void onError(Request request, Throwable exception) {
                    app_.error(ApplicationController.OOPS, exception);
                }

                public void onResponseReceived(Request request, Response response) {
                    try {
                        String text = response.getText();
                        JSONValue value = JSONParser.parse(text);
                        semester_.loadJSON(value);
                        semesterLoaded_ = true;
                    } catch (Exception e) {
                        app_.error("Error: " + response.getText(), e);
                    }
                }

            });
        }

        return semester_;
    }

    public CourseStartTimeModelView getStartTimeModel() {
        return startTime_;
    }

    public void setSemesterCriteria(String name, boolean included) {
        app_.getCourseController().setSemesterCriteria(name, included);
    }

    public void setLevelCriteria(String name, boolean included) {
        app_.getCourseController().setLevelCriteria(name, included);
    }

    public void setDepartmentCriteria(String name, boolean included) {
        app_.getCourseController().setDepartmentCriteria(name, included);
    }

    public void setStartTimeCriteria(String day, String startTime) {
        app_.getCourseController().setCourseStartTimeCriteria(day, startTime);
    }

    public void search() {
        app_.getCourseController().search();
    }

    public FindCourseView getView() {
        if (null == view_) {
            view_ = new FindCourseView(this);
        }

        return view_;
    }
}