ArchFaceProvider.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.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Map;
import javax.swing.ImageIcon;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

public class ArchFaceProvider extends AbstractFaceProvider {

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

    public int size() {
        return files.size();
    }

    public void addInfo(@NotNull final String faceName, @NotNull final String fileName) {
        files.put(faceName, fileName);
    }

    @Nullable
    public String getFilename(@NotNull final String faceName) {
        return files.get(faceName);
    }

    @Nullable
    @Override
    protected ImageIcon createImage(@NotNull final String faceName, final long stretch) {
        final String filename = files.get(faceName);
        if (filename == null) {
            return null;
        }

        final File file = new File(filename);
        final long length = file.length();
        if (length <= 0L || length >= (long) Integer.MAX_VALUE) {
            return null;
        }

        // It has been checked that the value will fit into an int.
        //noinspection NumericCastThatLosesPrecision
        final int intLength = (int) length;
        final byte[] buf = new byte[intLength];
        try {
            try (InputStream fis = new FileInputStream(file)) {
                if (fis.read(buf) != intLength) {
                    return null;
                }
            }
        } catch (final IOException ex) {
            return null;
        }

        return new ImageIcon(buf);
    }

}