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https://github.com/vanitasvitae/Smack.git
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c6248ec000
This commit adds the ability to plug-in different compression handlers for different compression methods. It is also possible to add more then one handler for the same method. The order how the handlers are added determines which handler is tried first for usage. This is used for the 'zlib' compression method, which now can be either provided by Java7 or by JZlib (just like it was done before). git-svn-id: http://svn.igniterealtime.org/svn/repos/smack/trunk@13522 b35dd754-fafc-0310-a699-88a17e54d16e
75 lines
2.7 KiB
Java
75 lines
2.7 KiB
Java
/**
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* Copyright 2013 Florian Schmaus
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*
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* All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.jivesoftware.smack.compression;
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import java.io.InputStream;
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import java.io.OutputStream;
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import java.lang.reflect.Constructor;
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import java.lang.reflect.InvocationTargetException;
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import java.lang.reflect.Method;
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/**
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* This class provides XMPP "zlib" compression with the help of JZLib. Note that jzlib-1.0.7 must be used (i.e. in the
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* classpath), newer versions won't work!
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*
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* @author Florian Schmaus
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* @see <a href="http://www.jcraft.com/jzlib/">JZLib</a>
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*
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*/
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public class JzlibInputOutputStream extends XMPPInputOutputStream {
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private static Class<?> zoClass = null;
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private static Class<?> ziClass = null;
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static {
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try {
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zoClass = Class.forName("com.jcraft.jzlib.ZOutputStream");
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ziClass = Class.forName("com.jcraft.jzlib.ZInputStream");
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} catch (ClassNotFoundException e) {
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}
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}
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public JzlibInputOutputStream() {
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compressionMethod = "zlib";
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}
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@Override
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public boolean isSupported() {
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return (zoClass != null && ziClass != null);
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}
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@Override
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public InputStream getInputStream(InputStream inputStream) throws SecurityException, NoSuchMethodException,
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IllegalArgumentException, IllegalAccessException, InvocationTargetException, InstantiationException {
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Constructor<?> constructor = ziClass.getConstructor(InputStream.class);
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Object in = constructor.newInstance(inputStream);
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Method method = ziClass.getMethod("setFlushMode", Integer.TYPE);
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method.invoke(in, 2);
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return (InputStream) in;
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}
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@Override
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public OutputStream getOutputStream(OutputStream outputStream) throws SecurityException, NoSuchMethodException,
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IllegalArgumentException, InstantiationException, IllegalAccessException, InvocationTargetException {
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Constructor<?> constructor = zoClass.getConstructor(OutputStream.class, Integer.TYPE);
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Object out = constructor.newInstance(outputStream, 9);
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Method method = zoClass.getMethod("setFlushMode", Integer.TYPE);
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method.invoke(out, 2);
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return (OutputStream) out;
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}
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}
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