Migrate from Ant to Gradle (SMACK-265)

compression-jzlib/src/main/java/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;
+    }
+}