Application: gvSIG desktop

package org.gvsig.expressionevaluator.swing.impl;

import java.util.ArrayList;

import java.util.Comparator;

import java.util.List;

import java.util.Objects;

import javax.swing.AbstractListModel;

import javax.swing.SwingUtilities;

import org.apache.commons.io.FilenameUtils;

import org.apache.commons.lang3.ObjectUtils;

import org.apache.commons.lang3.StringUtils;

import org.gvsig.tools.util.LabeledValue;

import org.gvsig.tools.util.LabeledValueImpl;

/**

 *

 * @author jjdelcerro

 */

class FilteredListModel extends AbstractListModel {

    private List<LabeledValue> elements;

    private List<LabeledValue> 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 LabeledValue getElementAt(int index) {

        return this.filteredElements.get(index);

    }

    void addElement(LabeledValue element) {

        this.elements.add(element);

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

            this.filteredElements.add(element);

        }

    }

    void addElement(Object element) {

        this.addElement(new LabeledValueImpl<>(Objects.toString(element, ""), element));

    }

    public void setFilter(String filter) {

        if (StringUtils.isBlank(filter)) {

            this.filter = null;

            this.filteredElements = this.elements;

        } else {

            this.filter = filter;

            this.filteredElements = new ArrayList<>();

            for (LabeledValue element : elements) {

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

                    this.filteredElements.add(element);

                }

            }

        }

        fireContentsChanged();

    }

    private void fireContentsChanged() {

        if( !SwingUtilities.isEventDispatchThread() ) {

            SwingUtilities.invokeLater(new Runnable() {

                @Override

                public void run() {

                    fireContentsChanged();

                }

            });

            return;

        }

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

     }

    public String getFilter() {

        return this.filter;

    }

    public void sort(final boolean ascending) {

        this.sortBackground(ascending);

    }

    private void sortBackground(final boolean ascending) {

        Thread th = new Thread(new Runnable() {

            @Override

            public void run() {

                sortForeground(ascending);

            }

        }, "FilteredListModelSorter");

        th.start();

    }

    private void sortForeground(final boolean ascending) {

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

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

            @Override

            public int compare(Comparable o1, Comparable o2) {

                int r = ObjectUtils.compare(o1, o2);

                if (ascending) {

                    return r;

                }

                return r * -1;

            }

        });

        elements = items;

        filteredElements = elements;

        if (filter != null) {

            setFilter(filter);

        } else {

            fireContentsChanged();

        }

    }

}