diff options
| -rw-r--r-- | src/java/com/jogamp/common/util/IOUtil.java | 37 |
1 files changed, 28 insertions, 9 deletions
diff --git a/src/java/com/jogamp/common/util/IOUtil.java b/src/java/com/jogamp/common/util/IOUtil.java index 09094bf..8c2a0c1 100644 --- a/src/java/com/jogamp/common/util/IOUtil.java +++ b/src/java/com/jogamp/common/util/IOUtil.java @@ -65,21 +65,39 @@ public class IOUtil { /** 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 static final Constructor<?> fosCtor; + private IOUtil() {} - static { + /** + * 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) { - if(DEBUG) { t.printStackTrace(); } _fosCtor = null; + _t = t; + } + if(DEBUG) { + System.err.println("IOUtil: java.io.FileOutputStream available: "+(null != _fosCtor)); + if(null!=_t) { + _t.printStackTrace(); + } } - fosCtor = _fosCtor; + return _fosCtor; } - - private IOUtil() {} - + /*** * * STREAM COPY STUFF @@ -302,12 +320,13 @@ public class IOUtil { * @param allowOverwrite * @return outputStream The resulting output stream * @throws IOException if the file already exists and <code>allowOverwrite</code> is false, - * the class <code>java.io.FileOutputStream</code> is not accessible or + * 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, feature not available."); + 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"); |