/**
* Copyright 2010 JogAmp Community. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are
* permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY JogAmp Community ``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 JogAmp Community 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.
*
* The views and conclusions contained in the software and documentation are those of the
* authors and should not be interpreted as representing official policies, either expressed
* or implied, of JogAmp Community.
*/
package com.jogamp.common.util;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.Closeable;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.security.AccessControlContext;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.lang.reflect.Constructor;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.nio.ByteBuffer;
import jogamp.common.Debug;
import jogamp.common.os.AndroidUtils;
import jogamp.common.os.PlatformPropsImpl;
import com.jogamp.common.net.AssetURLContext;
import com.jogamp.common.nio.Buffers;
import com.jogamp.common.os.MachineDescription;
import com.jogamp.common.os.Platform;
public class IOUtil {
public static final boolean DEBUG = Debug.debug("IOUtil");
/** Std. temporary directory property key <code>java.io.tmpdir</code> */
public static final String java_io_tmpdir_propkey = "java.io.tmpdir";
public static final String user_home_propkey = "user.home";
private static final String XDG_CACHE_HOME_envkey = "XDG_CACHE_HOME";
/** Subdirectory within platform's temporary root directory where all JogAmp related temp files are being stored: {@code jogamp} */
public static final String tmpSubDir = "jogamp";
private IOUtil() {}
/**
* Since usage of {@link java.io.FileOutputStream} is considered security critical,
* we need to check it's availability for each use.
* <p>
* In case a SecurityManager is installed, privileged access is required.
* </p>
*
* @return the constructor of {@link java.io.FileOutputStream} if available and
* no SecurityManager is installed or privileged access is granted.
* Otherwise null.
*
*/
private static final Constructor<?> getFOSCtor() {
Constructor<?> _fosCtor;
Throwable _t;
try {
_fosCtor = ReflectionUtil.getConstructor("java.io.FileOutputStream", new Class<?>[] { File.class }, IOUtil.class.getClassLoader());
_t = null;
} catch (Throwable t) {
_fosCtor = null;
_t = t;
}
if(DEBUG) {
System.err.println("IOUtil: java.io.FileOutputStream available: "+(null != _fosCtor));
if(null!=_t) {
_t.printStackTrace();
}
}
return _fosCtor;
}
/***
*
* STREAM COPY STUFF
*
*/
/**
* Copy the specified URL resource to the specified output file. The total
* number of bytes written is returned. Both streams are closed upon completion.
*
* @param conn the open URLConnection
* @param outFile the destination
* @return
* @throws IOException
*/
public static int copyURLConn2File(URLConnection conn, File outFile) throws IOException {
conn.connect(); // redundant
int totalNumBytes = 0;
InputStream in = new BufferedInputStream(conn.getInputStream());
try {
totalNumBytes = copyStream2File(in, outFile, conn.getContentLength());
} finally {
in.close();
}
return totalNumBytes;
}
/**
* Copy the specified input stream to the specified output file. The total
* number of bytes written is returned. Both streams are closed upon completion.
*
* @param in the source
* @param outFile the destination
* @param totalNumBytes informal number of expected bytes, maybe used for user feedback while processing. -1 if unknown
* @return
* @throws IOException
*/
public static int copyStream2File(InputStream in, File outFile, int totalNumBytes) throws IOException {
OutputStream out = new BufferedOutputStream(new FileOutputStream(outFile));
try {
totalNumBytes = copyStream2Stream(in, out, totalNumBytes);
} finally {
out.close();
}
return totalNumBytes;
}
/**
* Copy the specified input stream to the specified output stream. The total
* number of bytes written is returned.
*
* @param in the source
* @param out the destination
* @param totalNumBytes informal number of expected bytes, maybe used for user feedback while processing. -1 if unknown
* @return
* @throws IOException
*/
public static int copyStream2Stream(InputStream in, OutputStream out, int totalNumBytes) throws IOException {
final byte[] buf = new byte[Platform.getMachineDescription().pageSizeInBytes()];
int numBytes = 0;
while (true) {
int count;
if ((count = in.read(buf)) == -1) {
break;
}
out.write(buf, 0, count);
numBytes += count;
}
return numBytes;
}
/**
* Copy the specified input stream to a byte array, which is being returned.
*/
public static byte[] copyStream2ByteArray(InputStream stream) throws IOException {
// FIXME: Shall enforce a BufferedInputStream ?
if( !(stream instanceof BufferedInputStream) ) {
stream = new BufferedInputStream(stream);
}
int totalRead = 0;
int avail = stream.available();
byte[] data = new byte[avail];
int numRead = 0;
do {
if (totalRead + avail > data.length) {
final byte[] newData = new byte[totalRead + avail];
System.arraycopy(data, 0, newData, 0, totalRead);
data = newData;
}
numRead = stream.read(data, totalRead, avail);
if (numRead >= 0) {
totalRead += numRead;
}
avail = stream.available();
} while (avail > 0 && numRead >= 0);
// just in case the announced avail > totalRead
if (totalRead != data.length) {
final byte[] newData = new byte[totalRead];
System.arraycopy(data, 0, newData, 0, totalRead);
data = newData;
}
return data;
}
/**
* Copy the specified input stream to a NIO ByteBuffer w/ native byte order, which is being returned.
* <p>The implementation creates the ByteBuffer w/ {@link #copyStream2ByteArray(InputStream)}'s returned byte array.</p>
*
* @param stream input stream, which will be wrapped into a BufferedInputStream, if not already done.
*/
public static ByteBuffer copyStream2ByteBuffer(InputStream stream) throws IOException {
return copyStream2ByteBuffer(stream, -1);
}
/**
* Copy the specified input stream to a NIO ByteBuffer w/ native byte order, which is being returned.
* <p>The implementation creates the ByteBuffer w/ {@link #copyStream2ByteArray(InputStream)}'s returned byte array.</p>
*
* @param stream input stream, which will be wrapped into a BufferedInputStream, if not already done.
* @param initialCapacity initial buffer capacity in bytes, if > available bytes
*/
public static ByteBuffer copyStream2ByteBuffer(InputStream stream, int initialCapacity) throws IOException {
if( !(stream instanceof BufferedInputStream) ) {
stream = new BufferedInputStream(stream);
}
int avail = stream.available();
if( initialCapacity < avail ) {
initialCapacity = avail;
}
final MachineDescription machine = Platform.getMachineDescription();
ByteBuffer data = Buffers.newDirectByteBuffer( machine.pageAlignedSize( initialCapacity ) );
byte[] chunk = new byte[machine.pageSizeInBytes()];
int chunk2Read = Math.min(machine.pageSizeInBytes(), avail);
int numRead = 0;
do {
if (avail > data.remaining()) {
final ByteBuffer newData = Buffers.newDirectByteBuffer(
machine.pageAlignedSize(data.position() + avail) );
newData.put(data);
data = newData;
}
numRead = stream.read(chunk, 0, chunk2Read);
if (numRead > 0) {
data.put(chunk, 0, numRead);
}
avail = stream.available();
chunk2Read = Math.min(machine.pageSizeInBytes(), avail);
} while ( numRead > 0 ); // EOS: -1 == numRead, EOF maybe reached earlier w/ 0 == numRead
data.flip();
return data;
}
/***
*
* RESOURCE / FILE NAME STUFF
*
*/
/**
*
* @param path
* @param startWithSlash
* @param endWithSlash
* @return
* @throws RuntimeException if final path is empty or has no parent directory available while resolving <code>../</code>
*/
public static String slashify(String path, boolean startWithSlash, boolean endWithSlash) throws RuntimeException {
String p = path.replace('\\', '/'); // unify file seperator
if (startWithSlash && !p.startsWith("/")) {
p = "/" + p;
}
if (endWithSlash && !p.endsWith("/")) {
p = p + "/";
}
try {
return cleanPathString(p);
} catch (MalformedURLException e) {
throw new RuntimeException(e);
}
}
/** Using the proper advertised conversion via File -> URI -> URL */
public static URL toURL(File file) throws MalformedURLException {
return file.toURI().toURL();
}
/** Using the simple conversion via File -> URL, assuming proper characters. */
public static URL toURLSimple(File file) throws MalformedURLException {
return new URL("file", "", slashify(file.getAbsolutePath(), true, file.isDirectory()));
}
public static URL toURLSimple(String protocol, String file, boolean isDirectory) throws MalformedURLException {
return new URL(protocol, "", slashify(file, true, isDirectory));
}
/**
* Returns the lowercase suffix of the given file name (the text
* after the last '.' in the file name). Returns null if the file
* name has no suffix. Only operates on the given file name;
* performs no I/O operations.
*
* @param file name of the file
* @return lowercase suffix of the file name
* @throws NullPointerException if file is null
*/
public static String getFileSuffix(File file) {
return getFileSuffix(file.getName());
}
/**
* Returns the lowercase suffix of the given file name (the text
* after the last '.' in the file name). Returns null if the file
* name has no suffix. Only operates on the given file name;
* performs no I/O operations.
*
* @param filename name of the file
* @return lowercase suffix of the file name
* @throws NullPointerException if filename is null
*/
public static String getFileSuffix(String filename) {
int lastDot = filename.lastIndexOf('.');
if (lastDot < 0) {
return null;
}
return toLowerCase(filename.substring(lastDot + 1));
}
/***
* @param file
* @param allowOverwrite
* @return outputStream The resulting output stream
* @throws IOException if the file already exists and <code>allowOverwrite</code> is false,
* the class {@link java.io.FileOutputStream} is not accessible or
* the user does not have sufficient rights to access the local filesystem.
*/
public static FileOutputStream getFileOutputStream(File file, boolean allowOverwrite) throws IOException {
final Constructor<?> fosCtor = getFOSCtor();
if(null == fosCtor) {
throw new IOException("Cannot open file (" + file + ") for writing, FileOutputStream feature not available.");
}
if (file.exists() && !allowOverwrite) {
throw new IOException("File already exists (" + file + ") and overwrite=false");
}
try {
return (FileOutputStream) fosCtor.newInstance(new Object[] { file });
} catch (Exception e) {
throw new IOException("error opening " + file + " for write. ", e);
}
}
public static String getClassFileName(String clazzBinName) {
// or return clazzBinName.replace('.', File.separatorChar) + ".class"; ?
return clazzBinName.replace('.', '/') + ".class";
}
/**
* @param clazzBinName com.jogamp.common.util.cache.TempJarCache
* @param cl ClassLoader to locate the JarFile
* @return jar:file:/usr/local/projects/JOGL/gluegen/build-x86_64/gluegen-rt.jar!/com/jogamp/common/util/cache/TempJarCache.class
* @throws IOException if the jar file could not been found by the ClassLoader
*/
public static URL getClassURL(String clazzBinName, ClassLoader cl) throws IOException {
final URL url = cl.getResource(getClassFileName(clazzBinName));
if(null == url) {
throw new IOException("Cannot not find: "+clazzBinName);
}
return url;
}
/**
* Returns the basename of the given fname w/o directory part
*/
public static String getBasename(String fname) {
fname = slashify(fname, false, false);
int lios = fname.lastIndexOf('/'); // strip off dirname
if(lios>=0) {
fname = fname.substring(lios+1);
}
return fname;
}
/**
* Returns unified '/' dirname including the last '/'
*/
public static String getDirname(String fname) {
fname = slashify(fname, false, false);
int lios = fname.lastIndexOf('/'); // strip off dirname
if(lios>=0) {
fname = fname.substring(0, lios+1);
}
return fname;
}
private static String toLowerCase(String arg) {
if (arg == null) {
return null;
}
return arg.toLowerCase();
}
/***
*
* RESOURCE LOCATION STUFF
*
*/
/**
* Locating a resource using {@link #getResource(String, ClassLoader)}:
* <ul>
* <li><i>relative</i>: <code>context</code>'s package name-path plus <code>resourcePath</code> via <code>context</code>'s ClassLoader.
* This allows locations relative to JAR- and other URLs.
* The <code>resourcePath</code> may start with <code>../</code> to navigate to parent folder.</li>
* <li><i>absolute</i>: <code>context</code>'s ClassLoader and the <code>resourcePath</code> as is (filesystem)</li>
* </ul>
*
* <p>
* Returns the resolved and open URLConnection or null if not found.
* </p>
*
* @see #getResource(String, ClassLoader)
* @see ClassLoader#getResource(String)
* @see ClassLoader#getSystemResource(String)
*/
public static URLConnection getResource(Class<?> context, String resourcePath) {
if(null == resourcePath) {
return null;
}
ClassLoader contextCL = (null!=context)?context.getClassLoader():IOUtil.class.getClassLoader();
URLConnection conn = null;
if(null != context) {
// scoping the path within the class's package
final String className = context.getName().replace('.', '/');
final int lastSlash = className.lastIndexOf('/');
if (lastSlash >= 0) {
final String pkgName = className.substring(0, lastSlash + 1);
conn = getResource(pkgName + resourcePath, contextCL);
if(DEBUG) {
System.err.println("IOUtil: found <"+resourcePath+"> within class package <"+pkgName+"> of given class <"+context.getName()+">: "+(null!=conn));
}
}
} else if(DEBUG) {
System.err.println("IOUtil: null context");
}
if(null == conn) {
conn = getResource(resourcePath, contextCL);
if(DEBUG) {
System.err.println("IOUtil: found <"+resourcePath+"> by classloader: "+(null!=conn));
}
}
return conn;
}
/**
* Locating a resource using the ClassLoader's facilities.
* <p>
* Returns the resolved and connected URLConnection or null if not found.
* </p>
*
* @see ClassLoader#getResource(String)
* @see ClassLoader#getSystemResource(String)
* @see URL#URL(String)
* @see File#File(String)
*/
public static URLConnection getResource(String resourcePath, ClassLoader cl) {
if(null == resourcePath) {
return null;
}
if(DEBUG) {
System.err.println("IOUtil: locating <"+resourcePath+">, has cl: "+(null!=cl));
}
if(resourcePath.startsWith(AssetURLContext.asset_protocol_prefix)) {
try {
return AssetURLContext.createURL(resourcePath, cl).openConnection();
} catch (IOException ioe) {
if(DEBUG) {
System.err.println("IOUtil: Catched Exception:");
ioe.printStackTrace();
}
return null;
}
} else {
try {
return AssetURLContext.resolve(resourcePath, cl);
} catch (IOException ioe) {
if(DEBUG) {
System.err.println("IOUtil: Catched Exception:");
ioe.printStackTrace();
}
}
}
return null;
}
/**
* Generates a path for the 'relativeFile' relative to the 'baseLocation'.
*
* @param baseLocation denotes a directory
* @param relativeFile denotes a relative file to the baseLocation
*/
public static String getRelativeOf(File baseLocation, String relativeFile) {
if(null == relativeFile) {
return null;
}
if (baseLocation != null) {
final File file = new File(baseLocation, relativeFile);
// Handle things on Windows
return slashify(file.getPath(), false, false);
}
return null;
}
/**
* @param path assuming a slashified path beginning with "/" as it's root directory, either denotes a file or directory.
* @return parent of path
* @throws MalformedURLException if path is empty or has parent no directory available
*/
public static String getParentOf(String path) throws MalformedURLException {
final int pl = null!=path ? path.length() : 0;
if(pl == 0) {
throw new MalformedURLException("path is empty <"+path+">");
}
final int e = path.lastIndexOf("/");
if( e < 0 ) {
throw new MalformedURLException("path contains no '/' <"+path+">");
}
if( e == 0 ) {
// path is root directory
throw new MalformedURLException("path has no parents <"+path+">");
}
if( e < pl - 1 ) {
// path is file, return it's parent directory
return path.substring(0, e+1);
}
final int j = path.lastIndexOf("!") + 1; // '!' Separates JARFile entry -> local start of path
// path is a directory ..
final int p = path.lastIndexOf("/", e-1);
if( p >= j) {
return path.substring(0, p+1);
}
throw new MalformedURLException("parent of path contains no '/' <"+path+">");
}
/**
* @param path assuming a slashified path beginning with "/" as it's root directory, either denotes a file or directory.
* @return clean path string where <code>../</code> and <code>./</code> is resolved.
* @throws MalformedURLException if path is empty or has no parent directory available while resolving <code>../</code>
*/
public static String cleanPathString(String path) throws MalformedURLException {
int idx;
while ( ( idx = path.indexOf("../") ) >= 0 ) {
path = getParentOf(path.substring(0, idx)) + path.substring(idx+3);
}
while ( ( idx = path.indexOf("./") ) >= 0 ) {
path = path.substring(0, idx) + path.substring(idx+2);
}
return path;
}
/**
* Generates a path for the 'relativeFile' relative to the 'baseLocation',
* hence the result is a absolute location.
*
* @param baseLocation denotes a URL to a directory if ending w/ '/', otherwise we assume a file
* @param relativeFile denotes a relative file to the baseLocation's parent directory
* @throws MalformedURLException
*/
public static URL getRelativeOf(URL baseLocation, String relativeFile) throws MalformedURLException {
final String scheme = baseLocation.getProtocol();
final String auth = baseLocation.getAuthority();
String path = baseLocation.getPath();
String query = baseLocation.getQuery();
String fragment = baseLocation.getRef();
if(!path.endsWith("/")) {
path = getParentOf(path);
}
return compose(scheme, auth, path, relativeFile, query, fragment);
}
public static URL compose(String scheme, String auth, String path1, String path2, String query, String fragment) throws MalformedURLException {
StringBuilder sb = new StringBuilder();
if(null!=scheme) {
sb.append(scheme);
sb.append(":");
}
if(null!=auth) {
sb.append("//");
sb.append(auth);
}
if(null!=path1) {
sb.append(path1);
}
if(null!=path2) {
sb.append(path2);
}
if(null!=query) {
sb.append("?");
sb.append(query);
}
if(null!=fragment) {
sb.append("#");
sb.append(fragment);
}
return new URL(cleanPathString(sb.toString()));
}
/**
* Returns the connected URLConnection, or null if not url is not available
*/
public static URLConnection openURL(URL url) {
return openURL(url, ".");
}
/**
* Returns the connected URLConnection, or null if not url is not available
*/
public static URLConnection openURL(URL url, String dbgmsg) {
if(null!=url) {
try {
final URLConnection c = url.openConnection();
c.connect(); // redundant
if(DEBUG) {
System.err.println("IOUtil: urlExists("+url+") ["+dbgmsg+"] - true");
}
return c;
} catch (IOException ioe) {
if(DEBUG) {
System.err.println("IOUtil: urlExists("+url+") ["+dbgmsg+"] - false - "+ioe.getClass().getSimpleName()+": "+ioe.getMessage());
ioe.printStackTrace();
}
}
} else if(DEBUG) {
System.err.println("IOUtil: no url - urlExists(null) ["+dbgmsg+"]");
}
return null;
}
private static String getShellSuffix() {
switch(PlatformPropsImpl.OS_TYPE) {
case WINDOWS:
return ".bat";
default:
return ".sh";
}
}
private static boolean getOSHasNoexecFS() {
switch(PlatformPropsImpl.OS_TYPE) {
case WINDOWS:
case OPENKODE:
return false;
default:
return true;
}
}
/**
* @see <a href="http://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html">Free-Desktop - XDG Base Directory Specification</a>
*/
private static boolean getOSHasFreeDesktopXDG() {
switch(PlatformPropsImpl.OS_TYPE) {
case ANDROID:
case MACOS:
case WINDOWS:
case OPENKODE:
return false;
default:
return true;
}
}
/**
* Test whether {@code file} exists and matches the given requirements
*
* @param file
* @param shallBeDir
* @param shallBeWritable
* @return
*/
public static boolean testFile(File file, boolean shallBeDir, boolean shallBeWritable) {
if (!file.exists()) {
if(DEBUG) {
System.err.println("IOUtil.testFile: <"+file.getAbsolutePath()+">: does not exist");
}
return false;
}
if (shallBeDir && !file.isDirectory()) {
if(DEBUG) {
System.err.println("IOUtil.testFile: <"+file.getAbsolutePath()+">: is not a directory");
}
return false;
}
if (shallBeWritable && !file.canWrite()) {
if(DEBUG) {
System.err.println("IOUtil.testFile: <"+file.getAbsolutePath()+">: is not writable");
}
return false;
}
return true;
}
/**
* Returns true if the given {@code dir}
* <ol>
* <li>exists, and</li>
* <li>is a directory, and</li>
* <li>is writeable, and</li>
* <li>files can be executed from the directory</li>
* </ol>
*
* @throws SecurityException if file creation and process execution is not allowed within the current security context
* @param dir
*/
public static boolean testDirExec(File dir)
throws SecurityException
{
if (!testFile(dir, true, true)) {
return false;
}
if(!getOSHasNoexecFS()) {
return true;
}
File exetst;
try {
exetst = File.createTempFile("jogamp_exe_tst", getShellSuffix(), dir);
} catch (SecurityException se) {
throw se; // fwd Security exception
} catch (IOException e) {
if(DEBUG) {
e.printStackTrace();
}
return false;
}
int ok = -1;
if(exetst.setExecutable(true)) {
try {
Process pr = Runtime.getRuntime().exec(exetst.getCanonicalPath());
pr.waitFor() ;
ok = pr.exitValue();
} catch (SecurityException se) {
throw se; // fwd Security exception
} catch (Throwable t) {
ok = -2;
if(DEBUG) {
System.err.println("IOUtil.testDirExec: <"+exetst.getAbsolutePath()+">: "+t.getMessage());
// t.printStackTrace();
}
}
}
exetst.delete();
return 0 == ok;
}
private static File testDirImpl(File dir, boolean create, boolean executable)
throws SecurityException
{
if (create && !dir.exists()) {
dir.mkdirs();
}
if( executable ) {
if(testDirExec(dir)) {
return dir;
}
} else if(testFile(dir, true, true)) {
return dir;
}
return null;
}
/**
* Returns the directory {@code dir}, which is processed and tested as described below.
* <ol>
* <li>If {@code create} is {@code true} and the directory does not exist yet, it is created incl. all sub-directories.</li>
* <li>If {@code dirName} exists, but is not a directory, {@code null} is being returned.</li>
* <li>If the directory does not exist or is not writeable, {@code null} is being returned.</li>
* <li>If {@code executable} is {@code true} and files cannot be executed from the directory, {@code null} is being returned.</li>
* </ol>
*
* @param dir the directory to process
* @param create true if the directory shall be created if not existing
* @param executable true if the user intents to launch executables from the temporary directory, otherwise false.
* @param acc The security {@link AccessControlContext} to create directories and test <i>executability</i>
* @throws SecurityException if file creation and process execution is not allowed within the current security context
*/
public static File testDir(final File dir, final boolean create, final boolean executable, AccessControlContext acc)
throws SecurityException
{
if( null != acc ) {
return AccessController.doPrivileged(new PrivilegedAction<File>() {
public File run() {
return testDirImpl(dir, create, executable);
} }, acc);
} else {
return testDirImpl(dir, create, executable);
}
}
private static boolean isStringSet(String s) { return null != s && 0 < s.length(); }
/**
* This methods finds [and creates] an available temporary sub-directory:
* <pre>
File tmpBaseDir = null;
if(null != testDir(tmpRoot, true, executable)) { // check tmpRoot first
for(int i = 0; null == tmpBaseDir && i<=9999; i++) {
final String tmpDirSuffix = String.format("_%04d", i); // 4 digits for iteration
tmpBaseDir = testDir(new File(tmpRoot, tmpSubDirPrefix+tmpDirSuffix), true, executable);
}
} else {
tmpBaseDir = null;
}
return tmpBaseDir;
* </pre>
* <p>
* The iteration through [0000-9999] ensures that the code is multi-user save.
* </p>
* @param tmpRoot
* @param executable
* @param tmpDirPrefix
* @return a temporary directory, writable by this user
* @throws SecurityException
*/
private static File getSubTempDir(File tmpRoot, String tmpSubDirPrefix, boolean executable)
throws SecurityException
{
File tmpBaseDir = null;
if(null != testDirImpl(tmpRoot, true /* create */, executable)) { // check tmpRoot first
for(int i = 0; null == tmpBaseDir && i<=9999; i++) {
final String tmpDirSuffix = String.format("_%04d", i); // 4 digits for iteration
tmpBaseDir = testDirImpl(new File(tmpRoot, tmpSubDirPrefix+tmpDirSuffix), true /* create */, executable);
}
} else {
tmpBaseDir = null;
}
return tmpBaseDir;
}
private static File getTempDirImpl(boolean executable)
throws SecurityException, RuntimeException
{
if(!tempRootSet) { // volatile: ok
synchronized(IOUtil.class) {
if(!tempRootSet) {
tempRootSet = true;
{
final File ctxTempDir = AndroidUtils.getTempRoot(); // null if ( !Android || no android-ctx )
if(null != ctxTempDir) {
tempRootNoexec = getSubTempDir(ctxTempDir, tmpSubDir, false /* executable, see below */);
tempRootExec = tempRootNoexec; // FIXME: Android temp root is always executable (?)
return tempRootExec;
}
}
final String java_io_tmpdir = PropertyAccess.getProperty(java_io_tmpdir_propkey, false, null);
final String user_home = PropertyAccess.getProperty(user_home_propkey, false, null);
final String xdg_cache_home;
{
String _xdg_cache_home;
if( getOSHasFreeDesktopXDG() ) {
_xdg_cache_home = System.getenv(XDG_CACHE_HOME_envkey);
if( !isStringSet(_xdg_cache_home) && isStringSet(user_home) ) {
_xdg_cache_home = user_home + File.separator + ".cache" ; // default
}
} else {
_xdg_cache_home = null;
}
xdg_cache_home = _xdg_cache_home;
}
// 1) java.io.tmpdir/jogamp
if( null == tempRootExec && isStringSet(java_io_tmpdir) ) {
tempRootExec = getSubTempDir(new File(java_io_tmpdir), tmpSubDir, true /* executable */);
}
// 2) $XDG_CACHE_HOME/jogamp
if(null == tempRootExec && isStringSet(xdg_cache_home)) {
tempRootExec = getSubTempDir(new File(xdg_cache_home), tmpSubDir, true /* executable */);
}
// 3) $HOME/.jogamp
if(null == tempRootExec && isStringSet(user_home)) {
tempRootExec = getSubTempDir(new File(user_home), "." + tmpSubDir, true /* executable */);
}
if(null != tempRootExec) {
tempRootNoexec = tempRootExec;
} else {
// 1) java.io.tmpdir/jogamp
if( null == tempRootNoexec && isStringSet(java_io_tmpdir) ) {
tempRootNoexec = getSubTempDir(new File(java_io_tmpdir), tmpSubDir, false /* executable */);
}
// 2) $XDG_CACHE_HOME/jogamp
if(null == tempRootNoexec && isStringSet(xdg_cache_home)) {
tempRootNoexec = getSubTempDir(new File(xdg_cache_home), tmpSubDir, false /* executable */);
}
// 3) $HOME/.jogamp
if(null == tempRootNoexec && isStringSet(user_home)) {
tempRootNoexec = getSubTempDir(new File(user_home), "." + tmpSubDir, false /* executable */);
}
}
if(DEBUG) {
System.err.println("IOUtil.getTempRoot(): temp dirs: exec: "+tempRootExec.getAbsolutePath()+", noexec: "+tempRootNoexec.getAbsolutePath());
}
}
}
}
final File r = executable ? tempRootExec : tempRootNoexec ;
if(null == r) {
throw new RuntimeException("Could not determine a temporary directory");
}
return r;
}
private static File tempRootExec = null; // writeable and executable
private static File tempRootNoexec = null; // writeable, maybe executable
private static volatile boolean tempRootSet = false;
/**
* Returns a platform independent writable directory for temporary files
* consisting of the platform's {@code temp-root} + {@link #tmpSubDir},
* e.g. {@code /tmp/jogamp_0000/}.
* <p>
* On standard Java the {@code temp-root} folder is specified by <code>java.io.tempdir</code>.
* </p>
* <p>
* On Android the {@code temp-root} folder is relative to the applications local folder
* (see {@link Context#getDir(String, int)}) is returned, if
* the Android application/activity has registered it's Application Context
* via {@link jogamp.common.os.android.StaticContext.StaticContext#init(Context, ClassLoader) StaticContext.init(..)}.
* This allows using the temp folder w/o the need for <code>sdcard</code>
* access, which would be the <code>java.io.tempdir</code> location on Android!
* </p>
* <p>
* In case {@code temp-root} is the users home folder,
* a dot is being prepended to {@link #tmpSubDir}, i.e.: {@code /home/user/.jogamp_0000/}.
* </p>
* @param executable true if the user intents to launch executables from the temporary directory, otherwise false.
* @param acc The security {@link AccessControlContext} to access properties, environment vars, create directories and test <i>executability</i>
* @throws SecurityException if access to <code>java.io.tmpdir</code> is not allowed within the current security context
* @throws RuntimeException if no temporary directory could be determined
*
* @see PropertyAccess#getProperty(String, boolean, java.security.AccessControlContext)
* @see Context#getDir(String, int)
*/
public static File getTempDir(final boolean executable, AccessControlContext acc)
throws SecurityException, RuntimeException
{
if( null != acc ) {
return AccessController.doPrivileged(new PrivilegedAction<File>() {
public File run() {
return getTempDirImpl(executable);
} }, acc);
} else {
return getTempDirImpl(executable);
}
}
/**
* Utilizing {@link File#createTempFile(String, String, File)} using
* {@link #getTempRoot(AccessControlContext, boolean)} as the directory parameter, ie. location
* of the root temp folder.
*
* @see File#createTempFile(String, String)
* @see File#createTempFile(String, String, File)
* @see #getTempRoot(AccessControlContext, boolean)
*
* @param prefix
* @param suffix
* @param executable true if the temporary root folder needs to hold executable files, otherwise false.
* @return
* @throws IllegalArgumentException
* @throws IOException
* @throws SecurityException
*/
public static File createTempFile(String prefix, String suffix, boolean executable, AccessControlContext acc)
throws IllegalArgumentException, IOException, SecurityException
{
return File.createTempFile( prefix, suffix, getTempDir(executable, acc) );
}
public static void close(Closeable stream, boolean throwRuntimeException) throws RuntimeException {
if(null != stream) {
try {
stream.close();
} catch (IOException e) {
if(throwRuntimeException) {
throw new RuntimeException(e);
} else if(DEBUG) {
System.err.println("Catched Exception: ");
e.printStackTrace();
}
}
}
}
}