1 files changed, 95 insertions, 0 deletions
diff --git a/src/main/java/org/apache/commons/compress/compressors/deflate/DeflateCompressorOutputStream.java b/src/main/java/org/apache/commons/compress/compressors/deflate/DeflateCompressorOutputStream.java
new file mode 100644
index 000000000..a31560563
--- /dev/null
+++ b/src/main/java/org/apache/commons/compress/compressors/deflate/DeflateCompressorOutputStream.java
@@ -0,0 +1,95 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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.apache.commons.compress.compressors.deflate;
+
+import java.io.IOException;
+import java.io.OutputStream;
+import java.util.zip.Deflater;
+import java.util.zip.DeflaterOutputStream;
+
+import org.apache.commons.compress.compressors.CompressorOutputStream;
+
+/**
+ * Deflate compressor.
+ * @since 1.9
+ */
+public class DeflateCompressorOutputStream extends CompressorOutputStream {
+    private final DeflaterOutputStream out;
+    private final Deflater deflater;
+
+    /**
+     * Creates a Deflate compressed output stream with the default parameters.
+     * @param outputStream the stream to wrap
+     * @throws IOException on error
+     */
+    public DeflateCompressorOutputStream(final OutputStream outputStream) throws IOException {
+        this(outputStream, new DeflateParameters());
+    }
+
+    /**
+     * Creates a Deflate compressed output stream with the specified parameters.
+     * @param outputStream the stream to wrap
+     * @param parameters the deflate parameters to apply
+     * @throws IOException on error
+     */
+    public DeflateCompressorOutputStream(final OutputStream outputStream,
+                                         final DeflateParameters parameters) throws IOException {
+        this.deflater = new Deflater(parameters.getCompressionLevel(), !parameters.withZlibHeader());
+        this.out = new DeflaterOutputStream(outputStream, deflater);
+    }
+
+    @Override
+    public void write(final int b) throws IOException {
+        out.write(b);
+    }
+
+    @Override
+    public void write(final byte[] buf, final int off, final int len) throws IOException {
+        out.write(buf, off, len);
+    }
+
+    /**
+     * Flushes the encoder and calls <code>outputStream.flush()</code>.
+     * All buffered pending data will then be decompressible from
+     * the output stream. Calling this function very often may increase
+     * the compressed file size a lot.
+     */
+    @Override
+    public void flush() throws IOException {
+        out.flush();
+    }
+
+    /**
+     * Finishes compression without closing the underlying stream.
+     * <p>No more data can be written to this stream after finishing.</p>
+     * @throws IOException on error
+     */
+    public void finish() throws IOException {
+        out.finish();
+    }
+
+    @Override
+    public void close() throws IOException {
+        try {
+            out.close();
+        } finally {
+            deflater.end();
+        }
+    }
+}