1 files changed, 97 insertions, 0 deletions
diff --git a/src/core/Support/Deflater.cs b/src/core/Support/Deflater.cs
new file mode 100644
index 0000000..03473de
--- /dev/null
+++ b/src/core/Support/Deflater.cs
@@ -0,0 +1,97 @@
+/*
+ *
+ * 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.
+ *
+*/
+
+using System;
+
+namespace Lucene.Net.Support
+{
+    public class Deflater
+    {
+        delegate void SetLevelDelegate(int level);
+        delegate void SetInputDelegate(byte[] input, int offset, int count);
+        delegate void FinishDelegate();
+        delegate bool GetIsFinishedDelegate();
+        delegate int DeflateDelegate(byte[] output);
+
+        SetLevelDelegate setLevelMethod;
+        SetInputDelegate setInputMethod;
+        FinishDelegate finishMethod;
+        GetIsFinishedDelegate getIsFinishedMethod;
+        DeflateDelegate deflateMethod;
+
+        public const int BEST_COMPRESSION = 9;
+
+        internal Deflater(object deflaterInstance)
+        {
+            Type type = deflaterInstance.GetType();
+
+            setLevelMethod = (SetLevelDelegate)Delegate.CreateDelegate(
+                typeof(SetLevelDelegate),
+                deflaterInstance,
+                type.GetMethod("SetLevel", new Type[] { typeof(int) }));
+
+            setInputMethod = (SetInputDelegate)Delegate.CreateDelegate(
+                typeof(SetInputDelegate),
+                deflaterInstance,
+                type.GetMethod("SetInput", new Type[] { typeof(byte[]), typeof(int), typeof(int) }));
+
+            finishMethod = (FinishDelegate)Delegate.CreateDelegate(
+                typeof(FinishDelegate),
+                deflaterInstance,
+                type.GetMethod("Finish", Type.EmptyTypes));
+
+            getIsFinishedMethod = (GetIsFinishedDelegate)Delegate.CreateDelegate(
+                typeof(GetIsFinishedDelegate),
+                deflaterInstance,
+                type.GetMethod("get_IsFinished", Type.EmptyTypes));
+
+            deflateMethod = (DeflateDelegate)Delegate.CreateDelegate(
+                typeof(DeflateDelegate),
+                deflaterInstance,
+                type.GetMethod("Deflate", new Type[] { typeof(byte[]) }));
+        }
+
+        public void SetLevel(int level)
+        {
+            setLevelMethod(level);
+        }
+
+        public void SetInput(byte[] input, int offset, int count)
+        {
+            setInputMethod(input, offset, count);
+        }
+
+        public void Finish()
+        {
+            finishMethod();
+        }
+
+        public bool IsFinished
+        {
+            get { return getIsFinishedMethod(); }
+        }
+
+        public int Deflate(byte[] output)
+        {
+            return deflateMethod(output);
+        }
+    }
+}