ImageParser.java

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/*
 * This file is part of JXClient, the Fullscreen Java Crossfire Client.
 *
 * JXClient 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.
 *
 * JXClient 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 JXClient; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * Copyright (C) 2005-2008 Yann Chachkoff.
 * Copyright (C) 2006-2011 Andreas Kirschbaum.
 */

package com.realtime.crossfire.jxclient.skin.io;

import com.realtime.crossfire.jxclient.skin.skin.JXCSkinCache;
import com.realtime.crossfire.jxclient.skin.skin.JXCSkinException;
import com.realtime.crossfire.jxclient.skin.source.JXCSkinSource;
import java.awt.Color;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.InputStream;
import javax.imageio.ImageIO;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

public class ImageParser {

    @NotNull
    private final JXCSkinCache<BufferedImage> definedImages = new JXCSkinCache<>("image");

    @NotNull
    private final JXCSkinSource skinSource;

    public ImageParser(@NotNull final JXCSkinSource skinSource) {
        this.skinSource = skinSource;
    }

    public void clear() {
        definedImages.clear();
    }

    @Nullable
    public Image getImage(@Nullable final Color color, @NotNull final String name) throws IOException {
        //noinspection VariableNotUsedInsideIf
        return color == null ? getImage(name) : null;
    }

    @NotNull
    public BufferedImage getImage(@NotNull final String name) throws IOException {
        try {
            return definedImages.lookup(name);
        } catch (final JXCSkinException ignored) {
            // ignore
        }

        final String filename = "pictures/"+name+".png";
        final BufferedImage image;
        try (final InputStream inputStream = skinSource.getInputStream(filename)) {
            image = ImageIO.read(inputStream);
        }
        if (image == null) {
            throw new IOException("image '"+skinSource.getURI(filename)+"' does not exist");
        }
        try {
            definedImages.insert(name, image);
        } catch (final JXCSkinException ex) {
            throw new AssertionError(ex);
        }
        return image;
    }

}