searchsemanticinindexthread.java

基于MPEG 7 标准,符合未来语义网架构,很值得参考

/*
 * This file is part of Caliph & Emir.
 *
 * Caliph & Emir is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * Caliph & Emir 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 Caliph & Emir; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Copyright statement:
 * --------------------
 * (c) 2002-2005 by Mathias Lux ([e-mail])
 * http://www.juggle.at, http://caliph-emir.sourceforge.net
 */
package at.lux.fotoretrieval;

import at.lux.components.ProgressWindow;
import at.lux.fotoretrieval.panels.ResultsPanel;
import at.lux.fotoretrieval.retrievalengines.RetrievalEngine;
import at.lux.fotoretrieval.retrievalengines.RetrievalEngineFactory;

import javax.swing.*;
import java.awt.*;
import java.text.DecimalFormat;
import java.text.NumberFormat;
import java.util.Vector;

/**
 * SearchThroughXPathThread
 *
 * @author Mathias Lux, [e-mail]
 */
public class SearchSemanticInIndexThread extends Thread {
//    Element ColorLayoutDescriptor;
    String dir, xPath;
    boolean recursive;
    RetrievalFrame parent;
    JProgressBar progress;
    DecimalFormat df;

    public SearchSemanticInIndexThread(String xPath, String directory, boolean descend,
                                       RetrievalFrame frame, JProgressBar progress) {
        this.xPath = xPath;
        this.dir = directory;
        this.recursive = descend;
        this.parent = frame;
        this.progress = progress;
        df = (DecimalFormat) NumberFormat.getInstance();
        df.setMaximumFractionDigits(2);
    }

    public void run() {
        parent.setEnabled(false);
        ProgressWindow pw = new ProgressWindow(parent, progress);
        pw.pack();
        Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
        pw.setLocation((d.width - pw.getWidth()) / 2, (d.height - pw.getHeight()) / 2);
        pw.setVisible(true);
        long stime, ftime;
        stime = System.currentTimeMillis();
        parent.setStatus("searching for similar images ...");
        debug("XPath statement: " + xPath);
        RetrievalEngine engine;
        engine = RetrievalEngineFactory.getLuceneRetrievalEngine();
        stime = System.currentTimeMillis();
        java.util.List<ResultListEntry> results = engine.getImagesBySemantics(xPath, null, dir, recursive, progress);
        stime = System.currentTimeMillis() - stime;
//        System.out.println(stime);
//        System.out.println(results.size());
        ftime = System.currentTimeMillis();
        parent.setStatus("Formatting results ...");
        ResultsPanel rp = new ResultsPanel(new Vector(results), progress, parent.getQualityConstraints());
        ftime = System.currentTimeMillis() - ftime;
        parent.addResult(rp);
        parent.setStatus("Searched for " + df.format(stime / 1000.0) + " s, formatting lasted " + df.format(ftime / 1000.0) + " s");
        pw.setVisible(false);
        parent.setEnabled(true);
    }

    private void debug(String message) {
        if (RetrievalFrame.DEBUG) {
            System.out.println("[at.lux.fotoretrieval.SearchThroughXPathThread] " + message);
        }
    }

}