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diff --git a/src/org/apache/http/impl/entity/EntitySerializer.java b/src/org/apache/http/impl/entity/EntitySerializer.java
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+/*
+ * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk/module-main/src/main/java/org/apache/http/impl/entity/EntitySerializer.java $
+ * $Revision: 560343 $
+ * $Date: 2007-07-27 11:18:19 -0700 (Fri, 27 Jul 2007) $
+ *
+ * ====================================================================
+ * 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.
+ * ====================================================================
+ *
+ * This software consists of voluntary contributions made by many
+ * individuals on behalf of the Apache Software Foundation.  For more
+ * information on the Apache Software Foundation, please see
+ * <http://www.apache.org/>.
+ *
+ */
+
+package org.apache.http.impl.entity;
+
+import java.io.IOException;
+import java.io.OutputStream;
+
+import org.apache.http.HttpEntity;
+import org.apache.http.HttpException;
+import org.apache.http.HttpMessage;
+import org.apache.http.entity.ContentLengthStrategy;
+import org.apache.http.impl.io.ChunkedOutputStream;
+import org.apache.http.impl.io.ContentLengthOutputStream;
+import org.apache.http.impl.io.IdentityOutputStream;
+import org.apache.http.io.SessionOutputBuffer;
+
+/**
+ * Default implementation of an entity serializer.
+ * <p>
+ * This entity serializer currently supports only "chunked" and "identitiy" transfer-coding</a>
+ * </p>
+ * 
+ * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a>
+ *
+ * @version $Revision: 560343 $
+ * 
+ * @since 4.0
+ */
+public class EntitySerializer {
+
+    private final ContentLengthStrategy lenStrategy;
+    
+    public EntitySerializer(final ContentLengthStrategy lenStrategy) {
+        super();
+        if (lenStrategy == null) {
+            throw new IllegalArgumentException("Content length strategy may not be null");
+        }
+        this.lenStrategy = lenStrategy;
+    }
+
+    protected OutputStream doSerialize(
+            final SessionOutputBuffer outbuffer,
+            final HttpMessage message) throws HttpException, IOException {
+        long len = this.lenStrategy.determineLength(message);
+        if (len == ContentLengthStrategy.CHUNKED) {
+            return new ChunkedOutputStream(outbuffer);
+        } else if (len == ContentLengthStrategy.IDENTITY) {
+            return new IdentityOutputStream(outbuffer);
+        } else {
+            return new ContentLengthOutputStream(outbuffer, len);
+        }
+    }
+
+    public void serialize(
+            final SessionOutputBuffer outbuffer,
+            final HttpMessage message,
+            final HttpEntity entity) throws HttpException, IOException {
+        if (outbuffer == null) {
+            throw new IllegalArgumentException("Session output buffer may not be null");
+        }
+        if (message == null) {
+            throw new IllegalArgumentException("HTTP message may not be null");
+        }
+        if (entity == null) {
+            throw new IllegalArgumentException("HTTP entity may not be null");
+        }
+        OutputStream outstream = doSerialize(outbuffer, message);
+        entity.writeTo(outstream);
+        outstream.close();
+    }
+    
+}