CollectedFaceProvider.java

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/*
 * Gridarta MMORPG map editor for Crossfire, Daimonin and similar games.
 * Copyright (C) 2000-2015 The Gridarta Developers.
 *
 * This program 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.
 *
 * 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, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

package net.sf.gridarta.model.face;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.util.HashMap;
import java.util.Map;
import javax.swing.ImageIcon;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

@SuppressWarnings("IOResourceOpenedButNotSafelyClosed")
public class CollectedFaceProvider extends AbstractFaceProvider {

    private final Map<String, Long> positions = new HashMap<>();

    @NotNull
    private final RandomAccessFile file;

    public CollectedFaceProvider(final File file) throws FileNotFoundException {
        this.file = new RandomAccessFile(file, "r");
    }

    public CollectedFaceProvider(final String fileName) throws FileNotFoundException {
        file = new RandomAccessFile(fileName, "r");
    }

    public void addInfo(@NotNull final String faceName, final int pos, final int size) {
        positions.put(faceName, (long) pos << 32 | (long) size);
    }

    @Nullable
    @Override
    protected ImageIcon createImage(@NotNull final String faceName, final long stretch) {
        final Long position = positions.get(faceName);
        if (position == null) {
            return null;
        }
        final long posI = position;
        final byte[] buf;
        try {
            file.seek(posI >> 32);
            buf = new byte[(int) posI];
            file.readFully(buf);
        } catch (final IOException e) {
            return null;
        }
        return new ImageIcon(buf);
    }

}