From 9d52f627670e5785e44b8b163dc29fadba007e44 Mon Sep 17 00:00:00 2001 From: iNPUTmice Date: Tue, 9 Dec 2014 14:14:15 +0100 Subject: cleanup: removed stream compression --- .../conversations/utils/zlib/ZLibInputStream.java | 54 ------------ .../conversations/utils/zlib/ZLibOutputStream.java | 95 ---------------------- 2 files changed, 149 deletions(-) delete mode 100644 src/main/java/eu/siacs/conversations/utils/zlib/ZLibInputStream.java delete mode 100644 src/main/java/eu/siacs/conversations/utils/zlib/ZLibOutputStream.java (limited to 'src/main/java/eu/siacs/conversations/utils') diff --git a/src/main/java/eu/siacs/conversations/utils/zlib/ZLibInputStream.java b/src/main/java/eu/siacs/conversations/utils/zlib/ZLibInputStream.java deleted file mode 100644 index b777c10c..00000000 --- a/src/main/java/eu/siacs/conversations/utils/zlib/ZLibInputStream.java +++ /dev/null @@ -1,54 +0,0 @@ -package eu.siacs.conversations.utils.zlib; - -import java.io.IOException; -import java.io.InputStream; -import java.util.zip.Inflater; -import java.util.zip.InflaterInputStream; - -/** - * ZLibInputStream is a zlib and input stream compatible version of an - * InflaterInputStream. This class solves the incompatibility between - * {@link InputStream#available()} and {@link InflaterInputStream#available()}. - */ -public class ZLibInputStream extends InflaterInputStream { - - /** - * Construct a ZLibInputStream, reading data from the underlying stream. - * - * @param is - * The {@code InputStream} to read data from. - * @throws IOException - * If an {@code IOException} occurs. - */ - public ZLibInputStream(InputStream is) throws IOException { - super(is, new Inflater(), 512); - } - - /** - * Provide a more InputStream compatible version of available. A return - * value of 1 means that it is likly to read one byte without blocking, 0 - * means that the system is known to block for more input. - * - * @return 0 if no data is available, 1 otherwise - * @throws IOException - */ - @Override - public int available() throws IOException { - /* - * This is one of the funny code blocks. InflaterInputStream.available - * violates the contract of InputStream.available, which breaks kXML2. - * - * I'm not sure who's to blame, oracle/sun for a broken api or the - * google guys for mixing a sun bug with a xml reader that can't handle - * it.... - * - * Anyway, this simple if breaks suns distorted reality, but helps to - * use the api as intended. - */ - if (inf.needsInput()) { - return 0; - } - return super.available(); - } - -} diff --git a/src/main/java/eu/siacs/conversations/utils/zlib/ZLibOutputStream.java b/src/main/java/eu/siacs/conversations/utils/zlib/ZLibOutputStream.java deleted file mode 100644 index 8b3f5e68..00000000 --- a/src/main/java/eu/siacs/conversations/utils/zlib/ZLibOutputStream.java +++ /dev/null @@ -1,95 +0,0 @@ -package eu.siacs.conversations.utils.zlib; - -import java.io.IOException; -import java.io.OutputStream; -import java.lang.reflect.InvocationTargetException; -import java.lang.reflect.Method; -import java.security.NoSuchAlgorithmException; -import java.util.zip.Deflater; -import java.util.zip.DeflaterOutputStream; - -/** - *

- * Android 2.2 includes Java7 FLUSH_SYNC option, which will be used by this - * Implementation, preferable via reflection. The @hide was remove in API level - * 19. This class might thus go away in the future. - *

- *

- * Please use {@link ZLibOutputStream#SUPPORTED} to check for flush - * compatibility. - *

- */ -public class ZLibOutputStream extends DeflaterOutputStream { - - /** - * The reflection based flush method. - */ - - private final static Method method; - /** - * SUPPORTED is true if a flush compatible method exists. - */ - public final static boolean SUPPORTED; - - /** - * Static block to initialize {@link #SUPPORTED} and {@link #method}. - */ - static { - Method m = null; - try { - m = Deflater.class.getMethod("deflate", byte[].class, int.class, - int.class, int.class); - } catch (SecurityException e) { - } catch (NoSuchMethodException e) { - } - method = m; - SUPPORTED = (method != null); - } - - /** - * Create a new ZLib compatible output stream wrapping the given low level - * stream. ZLib compatiblity means we will send a zlib header. - * - * @param os - * OutputStream The underlying stream. - * @throws IOException - * In case of a lowlevel transfer problem. - * @throws NoSuchAlgorithmException - * In case of a {@link Deflater} error. - */ - public ZLibOutputStream(OutputStream os) throws IOException, - NoSuchAlgorithmException { - super(os, new Deflater(Deflater.BEST_COMPRESSION)); - } - - /** - * Flush the given stream, preferring Java7 FLUSH_SYNC if available. - * - * @throws IOException - * In case of a lowlevel exception. - */ - @Override - public void flush() throws IOException { - if (!SUPPORTED) { - super.flush(); - return; - } - try { - int count = 0; - do { - count = (Integer) method.invoke(def, buf, 0, buf.length, 3); - if (count > 0) { - out.write(buf, 0, count); - } - } while (count > 0); - } catch (IllegalArgumentException e) { - throw new IOException("Can't flush"); - } catch (IllegalAccessException e) { - throw new IOException("Can't flush"); - } catch (InvocationTargetException e) { - throw new IOException("Can't flush"); - } - super.flush(); - } - -} -- cgit v1.2.3