Application: gvSIG desktop

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package org.gvsig.expressionevaluator.swing.impl;

import java.util.ArrayList;

import java.util.Comparator;

import java.util.List;

import javax.swing.AbstractListModel;

import javax.swing.SwingUtilities;

import org.apache.commons.io.FilenameUtils;

import org.apache.commons.lang3.StringUtils;

/**

 *

 * @author jjdelcerro

 */

class FilteredListModel extends AbstractListModel {

    private List<Object> elements;

    private List<Object> filteredElements;

    private String filter;

    public FilteredListModel() {

        this.elements = new ArrayList<>();

        this.filteredElements = this.elements;

        this.filter = null;

    }

    @Override

    public int getSize() {

        return this.filteredElements.size();

    }

    @Override

    public Object getElementAt(int index) {

        return this.filteredElements.get(index);

    }

    void addElement(String element) {

        this.elements.add(element);

        if (this.elements != this.filteredElements) {

            this.filteredElements.add(element);

        }

    }

    public void setFilter(String filter) {

        if (StringUtils.isEmpty(filter)) {

            this.filter = null;

            this.filteredElements = this.elements;

        } else {

            this.filteredElements = new ArrayList<>();

            for (Object element : elements) {

                if (FilenameUtils.wildcardMatch(element.toString(), this.filter)) {

                    this.filteredElements.add(element);

                }

            }

        }

        this.fireContentsChanged(this, 0, this.filteredElements.size());

    }

    public void sort(final boolean ascending) {

        Thread th = new Thread(new Runnable() {

            @Override

            public void run() {

                final List<Object> items = new ArrayList(elements);

                items.sort(new Comparator<Object>() {

                    @Override

                    public int compare(Object o1, Object o2) {

                        int r;

                        if( o1 == null && o2 == null ) {

                           r = 0;

                        } else if( o1 == null && o2 != null ) {

                            r = -1;

                        } else if( o1 != null && o2 == null ) {

                            r = 1;

                        } else {

                            r = o1.toString().compareTo(o2.toString());

                        }

                        if( ascending ) {

                            return r;

                        }

                        return r * -1;

                    }

                });

                SwingUtilities.invokeLater(new Runnable() {

                    @Override

                    public void run() {

                        elements = items;

                        if( filter!=null ) {

                            setFilter(filter);

                        }

                    }

                });

            }

        }, "FilteredListModelSorter");

        th.start();

    }

    public String getFilter() {

        return this.filter;

    }

}