edu.harvard.mcz.imagecapture.data.HigherGeographyComboBoxModel.java Source code

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Here is the source code for edu.harvard.mcz.imagecapture.data.HigherGeographyComboBoxModel.java

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/**
 * HigherGeographyComboBoxModel.java
 * edu.harvard.mcz.imagecapture.data
 * Copyright  2013 President and Fellows of Harvard College
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of Version 2 of the GNU General Public License
 * as published by the Free Software Foundation.
 *
 * 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, see <http://www.gnu.org/licenses/>.
 * 
 * Author: Paul J. Morris
 */
package edu.harvard.mcz.imagecapture.data;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import javax.swing.AbstractListModel;
import javax.swing.ComboBoxModel;
import javax.swing.event.ListDataEvent;
import javax.swing.event.ListDataListener;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * @author mole
 *
 */
public class HigherGeographyComboBoxModel implements ComboBoxModel<MCZbaseGeogAuthRec> {
    private static final long serialVersionUID = -4856432985354519476L;

    private static final Log log = LogFactory.getLog(HigherGeographyComboBoxModel.class);

    ArrayList<MCZbaseGeogAuthRec> model;
    ArrayList<ListDataListener> dataListeners;
    MCZbaseGeogAuthRec selectedItem = null;

    public HigherGeographyComboBoxModel() {
        model = new ArrayList<MCZbaseGeogAuthRec>();
        // add a blank row
        model.add(new MCZbaseGeogAuthRec());
        dataListeners = new ArrayList<ListDataListener>();
    }

    /**
     * @param model
     */
    public HigherGeographyComboBoxModel(List<MCZbaseGeogAuthRec> model) {
        super();
        if (model.isEmpty()) {
            model = new ArrayList<MCZbaseGeogAuthRec>();
        }
        this.model = (ArrayList<MCZbaseGeogAuthRec>) model;
        if (model == null) {
            model = new ArrayList<MCZbaseGeogAuthRec>();
            // add a blank row.
            model.add(0, new MCZbaseGeogAuthRec());
        }
        dataListeners = new ArrayList<ListDataListener>();
    }

    /* (non-Javadoc)
     * @see javax.swing.ListModel#getSize()
     */
    @Override
    public int getSize() {
        return model.size();
    }

    /* (non-Javadoc)
     * @see javax.swing.ListModel#getElementAt(int)
     */
    @Override
    public MCZbaseGeogAuthRec getElementAt(int index) {
        return this.model.get(index);
    }

    /* (non-Javadoc)
     * @see javax.swing.ListModel#addListDataListener(javax.swing.event.ListDataListener)
     */
    @Override
    public void addListDataListener(ListDataListener l) {
        this.dataListeners.add(l);
    }

    /* (non-Javadoc)
     * @see javax.swing.ListModel#removeListDataListener(javax.swing.event.ListDataListener)
     */
    @Override
    public void removeListDataListener(ListDataListener l) {
        this.dataListeners.remove(l);
    }

    private void notifyListeners() {
        Iterator<ListDataListener> i = dataListeners.iterator();
        while (i.hasNext()) {
            i.next().contentsChanged(new ListDataEvent(this, ListDataEvent.CONTENTS_CHANGED, 0, model.size()));
        }
    }

    /* (non-Javadoc)
     * @see javax.swing.ComboBoxModel#setSelectedItem(java.lang.Object)
     */
    @Override
    public void setSelectedItem(Object anItem) {
        log.debug("Trying to set selected item: " + anItem);
        if (anItem != null) {
            Iterator<MCZbaseGeogAuthRec> i = model.iterator();
            boolean done = false;
            while (i.hasNext() && !done) {
                MCZbaseGeogAuthRec higher = i.next();
                try {
                    if (higher.getHigher_geog() != null
                            && higher.getHigher_geog().equals(((MCZbaseGeogAuthRec) anItem).getHigher_geog())) {
                        log.debug("Selected higher is: " + higher.getHigher_geog());
                        selectedItem = higher;
                        done = true;
                        notifyListeners();
                    }
                } catch (ClassCastException e) {
                    // Selected item is a string, we need to match to the corresponding object's higher geography value.
                    if (higher.getHigher_geog() != null && higher.getHigher_geog().equals(anItem)) {
                        log.debug("Selected higher is: " + higher.getHigher_geog());
                        selectedItem = higher;
                        done = true;
                        notifyListeners();
                    }
                }
            }
        }
    }

    /* (non-Javadoc)
     * @see javax.swing.ComboBoxModel#getSelectedItem()
     */
    @Override
    public Object getSelectedItem() {
        if (this.selectedItem == null) {
            return null;
        }
        //return this.selectedItem.getHigher_geog();
        return this.selectedItem;
    }

    /**
     * Obtain the higher geography string for the currently selected geography 
     * authority record object.
     * 
     * @return a string representation of the higher geography from the 
     * currently selected item, or null if there is no currently selected item. 
     */
    public String getSelectedItemHigherGeography() {
        if (this.selectedItem == null) {
            return null;
        }
        return this.selectedItem.getHigher_geog();
    }

    /**
     * 
     */
    public void removeAllElements() {
        this.model.clear();
    }

    /**
     * @param i
     * @return
     */
    public Object getDataElementAt(int i) {
        return model.get(i);
    }

    /**
     * @param dataElementAt
     */
    public void addElement(MCZbaseGeogAuthRec dataElementAt) {
        model.add(dataElementAt);

    }

    /**
     * @return
     */
    public List<MCZbaseGeogAuthRec> getModel() {
        return this.model;
    }

}