/*
* $Id$
* This file is a part of the Arakhne Foundation Classes, http://www.arakhne.org/afc
*
* Copyright (c) 2000-2012 Stephane GALLAND.
* Copyright (c) 2005-10, Multiagent Team, Laboratoire Systemes et Transports,
* Universite de Technologie de Belfort-Montbeliard.
* Copyright (c) 2013-2016 The original authors, and other authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.arakhne.afc.inputoutput.filefilter;
import java.io.File;
import java.io.IOException;
import java.net.URL;
import java.util.regex.Pattern;
import org.arakhne.afc.inputoutput.filetype.FileType;
import org.arakhne.afc.inputoutput.filetype.MagicNumber;
import org.arakhne.afc.inputoutput.filetype.MagicNumberStream;
import org.arakhne.afc.inputoutput.mime.MimeName;
import org.arakhne.afc.vmutil.locale.Locale;
/** File filter for 3D Object file document.
*
* @author $Author: sgalland$
* @version $FullVersion$
* @mavengroupid $GroupId$
* @mavenartifactid $ArtifactId$
* @since 14.0
*/
public class OBJ3DFileFilter extends AbstractFileFilter {
/** Default extension for the 3D Object files.
*/
public static final String EXTENSION_OBJ = "obj"; //$NON-NLS-1$
/** Construct.
*/
public OBJ3DFileFilter() {
this(true);
}
/**
* @param acceptDirectories is <code>true</code> to
* permit to this file filter to accept directories;
* <code>false</code> if the directories should not
* match.
*/
public OBJ3DFileFilter(boolean acceptDirectories) {
super(
acceptDirectories,
Locale.getString(OBJ3DFileFilter.class, "FILE_FILTER_NAME"), //$NON-NLS-1$
EXTENSION_OBJ);
}
/** Replies if the specified file contains <code>.obj</code> data.
*
* @param file is the file to test.
* @return <code>true</code> if the given file contains <code>.obj</code> data,
* otherwise <code>false</code>
*/
public static boolean isOBJFile(File file) {
return FileType.isContentType(file, MimeName.MIME_WAVEFRONT_OBJ.getMimeConstant());
}
/** Replies if the specified file contains <code>.obj</code> data.
*
* @param file is the file to test.
* @return <code>true</code> if the given file contains <code>.obj</code> data,
* otherwise <code>false</code>
*/
public static boolean isOBJFile(URL file) {
return FileType.isContentType(file, MimeName.MIME_WAVEFRONT_OBJ.getMimeConstant());
}
/** Replies if the specified file contains <code>.obj</code> data.
*
* @param file is the file to test.
* @return <code>true</code> if the given file contains <code>.obj</code> data,
* otherwise <code>false</code>
*/
public static boolean isOBJFile(String file) {
return FileType.isContentType(file, MimeName.MIME_WAVEFRONT_OBJ.getMimeConstant());
}
static {
//Register MIME file contents
FileType.addContentType(new OBJMagicNumber());
}
/** This class defines a set of informations that could distinguish
* a file content from another one. It is also known as Magic Number
* on several operating systems.
*
* <p>This magic number supports the text content.
*
* @author $Author: sgalland$
* @version $FullVersion$
* @mavengroupid $GroupId$
* @mavenartifactid $ArtifactId$
*/
private static class OBJMagicNumber extends MagicNumber {
private static final String NUMBER = "^[ \n\r\t\f]*((vt)|(vn)|p|l|v|f)([ \n\r\t\f]+" //$NON-NLS-1$
+ "[0-9.+-e]+(\\/[0-9.+-e]+){0,2})+[ \n\r\t\f]*$"; //$NON-NLS-1$
private static final String IDENTIFIER = "^[ \n\r\t\f]*(o|g)[ \n\r\t\f]+"; //$NON-NLS-1$
private static final String ONOFF = "^[ \n\r\t\f]*(s)[ \n\r\t\f]+((on)|(off))[ \n\r\t\f]*$"; //$NON-NLS-1$
private static final String COMMENT = "^#"; //$NON-NLS-1$
/** Constructor.
*/
OBJMagicNumber() {
super(
MimeName.MIME_WAVEFRONT_OBJ,
MimeName.MIME_OCTET_STREAM);
}
/** Replies if the specified stream contains data
* that corresponds to this magic number.
*/
@Override
@SuppressWarnings("checkstyle:magicnumber")
protected final boolean isContentType(MagicNumberStream stream) {
String string;
boolean found;
int offset = 0;
boolean foundOneOBJPrimitive = false;
final Pattern number = Pattern.compile(NUMBER);
final Pattern identifier = Pattern.compile(IDENTIFIER);
final Pattern onoff = Pattern.compile(ONOFF);
final Pattern comment = Pattern.compile(COMMENT);
int i = 0;
while (i < 20) {
found = false;
try {
final byte[] line = stream.readLine(offset);
if (line == null) {
return foundOneOBJPrimitive;
}
string = new String(line).trim();
offset += line.length + 1;
if (string.length() > 0) {
// Check if comment.
if (comment.matcher(string).find()) {
foundOneOBJPrimitive = true;
found = true;
} else if (number.matcher(string).find()) {
foundOneOBJPrimitive = true;
found = true;
} else if (identifier.matcher(string).find()) {
foundOneOBJPrimitive = true;
found = true;
} else if (onoff.matcher(string).find()) {
foundOneOBJPrimitive = true;
found = true;
}
} else {
// force to skip white lines
--i;
found = true;
}
} catch (IOException e) {
return true;
}
if (!found) {
return false;
}
++i;
}
return foundOneOBJPrimitive;
}
}
}