com.twelvemonkeys.imageio.util.WriterFileSuffixFilter Maven / Gradle / Ivy
/*
* Copyright (c) 2008, Harald Kuhr
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* * Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package com.twelvemonkeys.imageio.util;
import com.twelvemonkeys.io.FileUtil;
import com.twelvemonkeys.lang.StringUtil;
import javax.imageio.ImageIO;
import javax.swing.filechooser.FileFilter;
import java.io.File;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
/**
* WriterFileSuffixFilter
*
* @author Harald Kuhr
* @author last modified by $Author: haku$
* @version $Id: WriterFileSuffixFilter.java,v 1.0 11.okt.2006 20:05:36 haku Exp$
*/
public final class WriterFileSuffixFilter extends FileFilter implements java.io.FileFilter {
private final String description;
private Map knownSuffixes = new HashMap(32);
public WriterFileSuffixFilter() {
this("Images (all supported output formats)");
}
public WriterFileSuffixFilter(String pDescription) {
description = pDescription;
}
public boolean accept(File pFile) {
// Directories are always supported
if (pFile.isDirectory()) {
return true;
}
// Test if we have an ImageWriter for this suffix
String suffix = FileUtil.getExtension(pFile);
return !StringUtil.isEmpty(suffix) && hasWriterForSuffix(suffix);
}
private boolean hasWriterForSuffix(String pSuffix) {
if (knownSuffixes.get(pSuffix) == Boolean.TRUE) {
return true;
}
try {
// Cahce lookup
Iterator iterator = ImageIO.getImageWritersBySuffix(pSuffix);
if (iterator.hasNext()) {
knownSuffixes.put(pSuffix, Boolean.TRUE);
return true;
}
else {
knownSuffixes.put(pSuffix, Boolean.FALSE);
return false;
}
}
catch (IllegalArgumentException iae) {
return false;
}
}
public String getDescription() {
return description;
}
}