diff options
Diffstat (limited to 'src/org/jivesoftware/smack/compression/JzlibInputOutputStream.java')
-rw-r--r-- | src/org/jivesoftware/smack/compression/JzlibInputOutputStream.java | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/src/org/jivesoftware/smack/compression/JzlibInputOutputStream.java b/src/org/jivesoftware/smack/compression/JzlibInputOutputStream.java new file mode 100644 index 0000000..7db0773 --- /dev/null +++ b/src/org/jivesoftware/smack/compression/JzlibInputOutputStream.java @@ -0,0 +1,75 @@ +/** + * Copyright 2013 Florian Schmaus + * + * All rights reserved. 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.jivesoftware.smack.compression; + +import java.io.InputStream; +import java.io.OutputStream; +import java.lang.reflect.Constructor; +import java.lang.reflect.InvocationTargetException; +import java.lang.reflect.Method; + +/** + * This class provides XMPP "zlib" compression with the help of JZLib. Note that jzlib-1.0.7 must be used (i.e. in the + * classpath), newer versions won't work! + * + * @author Florian Schmaus + * @see <a href="http://www.jcraft.com/jzlib/">JZLib</a> + * + */ +public class JzlibInputOutputStream extends XMPPInputOutputStream { + + private static Class<?> zoClass = null; + private static Class<?> ziClass = null; + + static { + try { + zoClass = Class.forName("com.jcraft.jzlib.ZOutputStream"); + ziClass = Class.forName("com.jcraft.jzlib.ZInputStream"); + } catch (ClassNotFoundException e) { + } + } + + public JzlibInputOutputStream() { + compressionMethod = "zlib"; + } + + @Override + public boolean isSupported() { + return (zoClass != null && ziClass != null); + } + + @Override + public InputStream getInputStream(InputStream inputStream) throws SecurityException, NoSuchMethodException, + IllegalArgumentException, IllegalAccessException, InvocationTargetException, InstantiationException { + Constructor<?> constructor = ziClass.getConstructor(InputStream.class); + Object in = constructor.newInstance(inputStream); + + Method method = ziClass.getMethod("setFlushMode", Integer.TYPE); + method.invoke(in, 2); + return (InputStream) in; + } + + @Override + public OutputStream getOutputStream(OutputStream outputStream) throws SecurityException, NoSuchMethodException, + IllegalArgumentException, InstantiationException, IllegalAccessException, InvocationTargetException { + Constructor<?> constructor = zoClass.getConstructor(OutputStream.class, Integer.TYPE); + Object out = constructor.newInstance(outputStream, 9); + + Method method = zoClass.getMethod("setFlushMode", Integer.TYPE); + method.invoke(out, 2); + return (OutputStream) out; + } +} |