HBASE-7289 Strip Writable from KeyValue

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1419958 13f79535-47bb-0310-9956-ffa450edef68

hbase-server/src/main/java/org/apache/hadoop/hbase/mapreduce/KeyValueSerialization.java

@@ -0,0 +1,87 @@
+/**
+ * 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.hadoop.hbase.mapreduce;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+
+import org.apache.hadoop.hbase.KeyValue;
+import org.apache.hadoop.hbase.protobuf.ProtobufUtil;
+import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos;
+import org.apache.hadoop.io.serializer.Deserializer;
+import org.apache.hadoop.io.serializer.Serialization;
+import org.apache.hadoop.io.serializer.Serializer;
+
+public class KeyValueSerialization implements Serialization<KeyValue> {
+  @Override
+  public boolean accept(Class<?> c) {
+    return KeyValue.class.isAssignableFrom(c);
+  }
+
+  @Override
+  public KeyValueDeserializer getDeserializer(Class<KeyValue> t) {
+    return new KeyValueDeserializer();
+  }
+
+  @Override
+  public KeyValueSerializer getSerializer(Class<KeyValue> c) {
+    return new KeyValueSerializer();
+  }
+
+  public static class KeyValueDeserializer implements Deserializer<KeyValue> {
+    private InputStream is;
+
+    @Override
+    public void close() throws IOException {
+      this.is.close();
+    }
+
+    @Override
+    public KeyValue deserialize(KeyValue ignore) throws IOException {
+      // I can't overwrite the passed in KV, not from a proto kv, not just yet.  TODO
+      HBaseProtos.KeyValue proto =
+        HBaseProtos.KeyValue.parseDelimitedFrom(this.is);
+      return ProtobufUtil.toKeyValue(proto);
+    }
+
+    @Override
+    public void open(InputStream is) throws IOException {
+      this.is = is;
+    }
+  }
+
+  public static class KeyValueSerializer implements Serializer<KeyValue> {
+    private OutputStream os;
+
+    @Override
+    public void close() throws IOException {
+      this.os.close();
+    }
+
+    @Override
+    public void open(OutputStream os) throws IOException {
+      this.os = os;
+    }
+
+    @Override
+    public void serialize(KeyValue kv) throws IOException {
+      ProtobufUtil.toKeyValue(kv).writeDelimitedTo(this.os);
+    }
+  }
+}