content: /**
   * 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 com.aliyun.openservices.tablestore.hadoop;
  
  import java.io.DataInput;
  import java.io.ObjectInput;
  import java.io.DataOutput;
  import java.io.ObjectOutput;
  import java.io.IOException;
  import java.io.Externalizable;
  import org.apache.hadoop.io.Writable;
  import com.alicloud.openservices.tablestore.model.Row;
  import com.alicloud.openservices.tablestore.model.Column;
  import com.alicloud.openservices.tablestore.model.PrimaryKey;
  import com.alicloud.openservices.tablestore.core.utils.Preconditions;
  
  public class RowWritable implements Writable, Externalizable {
      private Row row = null;
  
      public RowWritable() {
      }
  
      public RowWritable(Row row) {
          Preconditions.checkNotNull(row, "row should not be null.");
          this.row = row;
      }
  
      public Row getRow() {
          return row;
      }
  
      public void setRow(Row row) {
          Preconditions.checkNotNull(row, "row should not be null.");
          this.row = row;
      }
  
      @Override public void write(DataOutput out) throws IOException {
          Preconditions.checkNotNull(row, "column should not be null.");
          out.writeByte(WritableConsts.ROW);
          new PrimaryKeyWritable(row.getPrimaryKey()).write(out);
          Column[] cols = row.getColumns();
          out.writeInt(cols.length);
          for(int i = 0; i < cols.length; ++i) {
              new ColumnWritable(cols[i]).write(out);
          }
      }
  
      @Override public void readFields(DataInput in) throws IOException {
          byte tagRow = in.readByte();
          if (tagRow != WritableConsts.ROW) {
              throw new IOException("broken input stream");
          }
          PrimaryKey pkey = PrimaryKeyWritable.read(in).getPrimaryKey();
          int sz = in.readInt();
          Column[] cols = new Column[sz];
          for(int i = 0; i < sz; ++i) {
              cols[i] = ColumnWritable.read(in).getColumn();
          }
          row = new Row(pkey, cols);
      }
  
      public static RowWritable read(DataInput in) throws IOException {
          RowWritable w = new RowWritable();
          w.readFields(in);
          return w;
      }
  
      @Override public void readExternal(ObjectInput in)
          throws IOException, ClassNotFoundException {
          this.readFields(in);
      }
  
      @Override public void writeExternal(ObjectOutput out) throws IOException {
          this.write(out);
      }
  }
  
  