flash.util.FileUtils Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of swfutils Show documentation
Show all versions of swfutils Show documentation
The Apache Royale Compiler SWF Utility classes
/*
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 flash.util;
import java.io.*;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.HashMap;
/**
* A collection of file related utilities.
*/
public final class FileUtils
{
public static final String canonicalPath(String rootPath)
{
if (rootPath == null)
return null;
return canonicalPath(new File(rootPath));
}
public static String canonicalPath(File file)
{
return canonicalFile(file).getPath();
}
public static File canonicalFile(File file)
{
try
{
return file.getCanonicalFile();
}
catch (IOException e)
{
return file.getAbsoluteFile();
}
}
static private HashMap filemap = null;
static private boolean checkCase = false;
/**
* Canonicalize on Win32 doesn't fix the case of the file to match what is on disk.
* Its annoying that this exists. It will be very slow until the server stabilizes.
* If this is called with a pattern where many files from the same directory will be
* needed, then the cache should be changed to hold the entire directory contents
* and check the modtime of the dir. It didn't seem like this was worth it for now.
* @param f
* @return
*/
public static synchronized String getTheRealPathBecauseCanonicalizeDoesNotFixCase( File f )
{
if (filemap == null)
{
filemap = new HashMap();
checkCase = System.getProperty("os.name").toLowerCase().startsWith("windows");
}
String path = FileUtils.canonicalPath( f );
if (!checkCase || !f.exists()) // if the file doesn't exist, then we can't do anything about it.
return path;
// We're going to ignore the issue where someone changes the capitalization of a file on the fly.
// If this becomes an important issue we'll have to make this cache smarter.
if (filemap.containsKey( path ))
return filemap.get( path );
String file = f.getName();
File canonfile = new File(path);
File dir = new File(canonfile.getParent());
// removing dir.listFiles() because it is not supproted in .NET
String[] ss = dir.list();
if (ss != null)
{
int n = ss.length;
File[] files = new File[n];
for (int i = 0; i < n; i++)
{
files[i] = new File(canonfile.getPath(), ss[i]);
}
for (int i = 0; i < files.length; ++i)
{
if (files[i].getName().equalsIgnoreCase( file ))
{
filemap.put( path, files[i].getAbsolutePath() );
return files[i].getAbsolutePath();
}
}
}
// If we got here, it must be because we can't read the directory?
return path;
}
public static String readFile(File file, String default_encoding) throws IOException
{
FileInputStream fileInputStream = new FileInputStream(file);
try
{
StringBuilder returnVal = new StringBuilder((int) file.length() );
BufferedInputStream in = new BufferedInputStream(fileInputStream);
in.mark(3);
Reader reader = new InputStreamReader(in, consumeBOM(in, default_encoding));
char[] line = new char[2000];
int count = 0;
while ((count = reader.read(line, 0, line.length)) >= 0)
{
returnVal.append(line, 0, count);
}
return returnVal.toString();
}
finally
{
fileInputStream.close();
}
}
public static String readFile(String filename, String default_encoding) throws IOException
{
return readFile(new File(filename), default_encoding);
}
/**
* @param in input stream
* @param default_encoding default encoding. null or "" => system default
* @return file encoding..
* @throws IOException
*/
public static final String consumeBOM(InputStream in, String default_encoding) throws IOException
{
return consumeBOM(in, default_encoding, false);
}
/**
* @param in input stream
* @param default_encoding default encoding. null or "" => system default
* @param alwaysConsumeBOM If true, then consume the UTF-16 BOM.
* If false use the previous behavior that consumes
* a UTF-8 BOM but not a UTF-16 BOM.
* This flag is useful when reading a file into
* a string that is then passed to a parser. The parser may
* not know to strip out the BOM.
* @return file encoding..
* @throws IOException
*/
public static final String consumeBOM(InputStream in,
String default_encoding,
boolean alwaysConsumeBOM) throws IOException
{
in.mark(3);
// Determine file encoding...
// ASCII - no header (use the supplied encoding)
// UTF8 - EF BB BF
// UTF16 - FF FE or FE FF (decoder chooses endian-ness)
if (in.read() == 0xef && in.read() == 0xbb && in.read() == 0xbf)
{
// UTF-8 reader does not consume BOM, so do not reset
if (System.getProperty("flex.platform.CLR") != null)
{
return "UTF8";
}
else
{
return "UTF-8";
}
}
else
{
in.reset();
int b0 = in.read();
int b1 = in.read();
if (b0 == 0xff && b1 == 0xfe || b0 == 0xfe && b1 == 0xff)
{
// If we don't consume the BOM is its assumed a
// UTF-16 reader will consume BOM
if (!alwaysConsumeBOM)
{
in.reset();
}
if (System.getProperty("flex.platform.CLR") != null)
{
return "UTF16";
}
else
{
return "UTF-16";
}
}
else
{
// no BOM found
in.reset();
if (default_encoding != null && default_encoding.length() != 0)
{
return default_encoding;
}
else
{
return System.getProperty("file.encoding");
}
}
}
}
/* post-1.2 File methods */
public static File getAbsoluteFile(File f)
{
File absolute = null;
try
{
absolute = f == null ? null : f.getAbsoluteFile();
}
catch (SecurityException se)
{
if (Trace.pathResolver)
{
Trace.trace(se.getMessage());
}
}
return absolute;
}
public static File getCanonicalFile(File f)
throws IOException
{
return new File(f.getCanonicalPath());
}
public static File getParentFile(File f)
{
String p = f.getParent();
if (p == null)
{
return null;
}
return new File(p);
}
public static File[] listFiles(File dir)
{
String[] fileNames = dir.list();
if (fileNames == null)
{
return null;
}
File[] fileList = new File[fileNames.length];
for (int i=0; i filteredFiles = new ArrayList();
for (int i=0; i < fileNames.length; i++)
{
if ((filter == null) || filter.accept(dir, fileNames[i]))
{
filteredFiles.add(new File(dir.getPath(), fileNames[i]));
}
}
return (filteredFiles.toArray(new File[0]));
}
public static URL toURL(File f)
throws MalformedURLException
{
String s = f.getAbsolutePath();
if (File.separatorChar != '/')
{
s = s.replace(File.separatorChar, '/');
}
if (!s.startsWith("/"))
{
s = "/" + s;
}
if (!s.endsWith("/") && f.isDirectory())
{
s = s + "/";
}
return new URL("file", "", s);
}
public static String addPathComponents(String p1, String p2, char sepchar)
{
if (p1 == null)
p1 = "";
if (p2 == null)
p2 = "";
int r1 = p1.length() - 1;
while ((r1 >= 0) && ((p1.charAt( r1 ) == sepchar)))
--r1;
int r2 = 0;
while ((r2 < p2.length()) && (p2.charAt( r2 ) == sepchar ))
++r2;
String left = p1.substring( 0, r1 + 1 );
String right = p2.substring( r2 );
String sep = "";
if ((left.length() > 0) && (right.length() > 0))
sep += sepchar;
return left + sep + right;
}
/**
* Java's File.renameTo doesn't try very hard.
* @param from absolute origin
* @param to absolute target
* @return true if rename succeeded
*/
public static boolean renameFile( File from, File to)
{
if (!from.exists())
{
return false;
}
long length = from.length();
try
{
if (to.exists())
{
if (!to.delete())
{
File old = new File( to.getAbsolutePath() + ".old" );
if (old.exists())
{
old.delete();
}
if (to.renameTo( old ) && !old.delete())
{
// unbefrickinlievable
// TODO - this isn't supported on .Net, write a replacement FileUtils.rename!!
// old.deleteOnExit();
}
}
}
}
catch (Exception e)
{
// eat exception, keep on going...
}
try
{
if (from.renameTo( to ))
{
return true;
}
// everything seems to have failed. copy the bits.
BufferedInputStream in = new BufferedInputStream(new FileInputStream( from ));
BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream( to ));
byte[] buf = new byte[8 * 1024];
long remain = from.length();
try
{
while ( remain > 0 )
{
int r = in.read( buf );
if (r < 0)
{
return false;
}
remain -= r;
out.write( buf, 0, r );
out.flush();
}
}
finally
{
in.close();
out.close();
}
long tolength = to.length();
if (tolength == length)
{
from.delete();
// TODO - .Net doesn't support this!!!
//to.setLastModified( from.lastModified() );
return true;
}
else
{
return false;
}
}
catch (Exception e)
{
return false;
}
}
public static byte[] toByteArray(InputStream in)
{
ByteArrayOutputStream baos = new ByteArrayOutputStream(8192);
byte[] buffer = new byte[8192];
int num = 0;
InputStream inputStream = new BufferedInputStream(in);
try
{
while ((num = inputStream.read(buffer)) != -1)
{
baos.write(buffer, 0, num);
}
}
catch (IOException ex)
{
if (Trace.error)
ex.printStackTrace();
// FIXME: do we really want to catch this without an exception?
}
finally
{
try
{
if (in != null)
in.close();
}
catch (IOException ex)
{
}
}
return baos.toByteArray();
}
public static byte[] toByteArray(InputStream in, int length) throws IOException
{
BufferedInputStream inputStream = new BufferedInputStream(in);
byte[] buffer = new byte[length];
try
{
int bytesRead = 0;
int index = 0;
while ((bytesRead >= 0) && (index < buffer.length))
{
bytesRead = inputStream.read(buffer, index, buffer.length - index);
index += bytesRead;
}
}
finally
{
inputStream.close();
}
return buffer;
}
public static void writeClassToFile(String baseDir, String packageName, String className, String str)
throws IOException
{
String reldir = packageName.replace( '.', File.separatorChar );
String dir = FileUtils.addPathComponents( baseDir, reldir, File.separatorChar );
new File( dir ).mkdirs();
String generatedName = FileUtils.addPathComponents( dir, className, File.separatorChar );
BufferedWriter fileWriter = null;
try
{
fileWriter = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(generatedName), "UTF-8"));
fileWriter.write( str );
fileWriter.flush();
}
finally
{
if (fileWriter != null)
{
try
{
fileWriter.close();
}
catch (IOException ex)
{
}
}
}
}
/**
* returns whether the file is absolute
* if a security exception is thrown, always returns false
*/
public static boolean isAbsolute(File f)
{
boolean absolute = false;
try
{
absolute = f.isAbsolute();
}
catch (SecurityException se)
{
if (Trace.pathResolver)
{
Trace.trace(se.getMessage());
}
}
return absolute;
}
/**
* returns whether the file is absolute
* if a security exception is thrown, always returns false
*/
public static boolean exists(File f)
{
boolean exists = false;
try
{
exists = f.exists();
}
catch (SecurityException se)
{
if (Trace.pathResolver)
{
Trace.trace(se.getMessage());
}
}
return exists;
}
/**
* returns whether it's a file
* if a security exception is thrown, always returns false
*/
public static boolean isFile(File f)
{
boolean isFile = false;
try
{
isFile = f.isFile();
}
catch (SecurityException se)
{
if (Trace.pathResolver)
{
Trace.trace(se.getMessage());
}
}
return isFile;
}
/**
* returns whether it's a directory
* if a security exception is thrown, always returns false
*/
public static boolean isDirectory(File f)
{
boolean isDirectory = false;
try
{
isDirectory = f.isDirectory();
}
catch (SecurityException se)
{
if (Trace.pathResolver)
{
Trace.trace(se.getMessage());
}
}
return isDirectory;
}
}