filters.SupportedFormats.java Source code

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Here is the source code for filters.SupportedFormats.java

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/*******************************************************************************
 * Instafilter, a RESTful API for manipulating images and applying customizable filters in real-time.
 * 
 * Copyright (C) 2012  Marco Palladino
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 ******************************************************************************/
package filters;

import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;

import javax.imageio.ImageIO;

import org.apache.commons.io.FilenameUtils;
import org.apache.commons.lang.StringUtils;

import exceptions.EmptyExtensionException;

public class SupportedFormats {

    private static List<String> formats;

    static {
        formats = new ArrayList<String>();
        String[] formatNames = ImageIO.getWriterFormatNames();
        for (String formatName : formatNames) {
            if (!formats.contains(formatName.toLowerCase())) {
                formats.add(formatName.toLowerCase());
            }
        }
    }

    public static String getFormatExtension(String path) {
        return FilenameUtils.getExtension(path).toLowerCase().trim();
    }

    public static String supportFormat(String path) throws EmptyExtensionException {
        String extension = getFormatExtension(path);
        if (StringUtils.isBlank(extension)) {
            throw new EmptyExtensionException();
        }
        if (formats.contains(extension)) {
            return extension;
        } else {
            return null;
        }
    }

    public static List<String> getSupportedFormats() {
        return formats;
    }

}