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.util.Set;
  import java.io.DataInput;
  import java.io.DataOutput;
  import java.io.IOException;
  import org.apache.hadoop.io.Writable;
  import com.alicloud.openservices.tablestore.model.RangeRowQueryCriteria;
  import com.alicloud.openservices.tablestore.model.TimeRange;
  import com.alicloud.openservices.tablestore.model.Direction;
  import com.alicloud.openservices.tablestore.core.utils.Preconditions;
  
  public class RangeRowQueryCriteriaWritable implements Writable {
      private RangeRowQueryCriteria criteria = null;
  
      public RangeRowQueryCriteriaWritable() {
      }
  
      public RangeRowQueryCriteriaWritable(RangeRowQueryCriteria criteria) {
          Preconditions.checkNotNull(criteria, "criteria should not be null.");
          this.criteria = criteria;
      }
  
      public RangeRowQueryCriteria getRangeRowQueryCriteria() {
          return criteria;
      }
  
      @Override public void write(DataOutput out) throws IOException {
          Preconditions.checkNotNull(criteria, "criteria should not be null.");
          Preconditions.checkNotNull(
              criteria.getTableName(),
              "criteria must have table name");
          out.writeByte(WritableConsts.GETRANGE_ROW_QUERY_CRITERIA);
          out.writeUTF(criteria.getTableName());
  
          if (criteria.numColumnsToGet() > 0) {
              Set<String> cols = criteria.getColumnsToGet();
              out.writeByte(WritableConsts.GETRANGE_COLUMNS_TO_GET);
              out.writeInt(cols.size());
              for(String c: cols) {
                  out.writeUTF(c);
              }
          }
          if (criteria.hasSetMaxVersions()) {
              out.writeByte(WritableConsts.GETRANGE_MAX_VERSIONS);
              out.writeInt(criteria.getMaxVersions());
          }
          if (criteria.hasSetTimeRange()) {
              TimeRange tm = criteria.getTimeRange();
              out.writeByte(WritableConsts.GETRANGE_TIME_RANGE);
              out.writeLong(tm.getStart());
              out.writeLong(tm.getEnd());
          }
          if (criteria.hasSetCacheBlock()) {
              out.writeByte(WritableConsts.GETRANGE_CACHE_BLOCKS);
              out.writeBoolean(criteria.getCacheBlocks());
          }
          if (criteria.hasSetStartColumn()) {
              out.writeByte(WritableConsts.GETRANGE_START_COLUMN);
              out.writeUTF(criteria.getStartColumn());
          }
          if (criteria.hasSetEndColumn()) {
              out.writeByte(WritableConsts.GETRANGE_END_COLUMN);
              out.writeUTF(criteria.getEndColumn());
          }
          if (criteria.getLimit() != -1) {
              out.writeByte(WritableConsts.GETRANGE_LIMIT);
              out.writeInt(criteria.getLimit());
          }
          if (criteria.getDirection() != Direction.FORWARD) {
              Preconditions.checkArgument(
                  criteria.getDirection() == Direction.BACKWARD,
                  "direction must be either FORWARD or BACKWORD");
              out.writeByte(WritableConsts.GETRANGE_BACKWARDS);
          }
          if (criteria.getInclusiveStartPrimaryKey() != null) {
              out.writeByte(WritableConsts.GETRANGE_START_PKEY);
              new PrimaryKeyWritable(criteria.getInclusiveStartPrimaryKey()).write(out);
          }
          if (criteria.getExclusiveEndPrimaryKey() != null) {
              out.writeByte(WritableConsts.GETRANGE_END_PKEY);
              new PrimaryKeyWritable(criteria.getExclusiveEndPrimaryKey()).write(out);
          }
          if (criteria.hasSetFilter()) {
              new FilterWritable(criteria.getFilter()).write(out);
          }
          out.writeByte(WritableConsts.GETRANGE_FINISH);
      }
  
      @Override public void readFields(DataInput in) throws IOException {
          byte tagCriteria = in.readByte();
          if (tagCriteria != WritableConsts.GETRANGE_ROW_QUERY_CRITERIA) {
              throw new IOException("broken input stream");
          }
          String tblName = in.readUTF();
          criteria = new RangeRowQueryCriteria(tblName);
  
          while(true) {
              byte tag = in.readByte();
              if (tag == WritableConsts.GETRANGE_COLUMNS_TO_GET) {
                  int sz = in.readInt();
                  for(int i = 0; i < sz; ++i) {
                      String c = in.readUTF();
                      criteria.addColumnsToGet(c);
                  }
              } else if (tag == WritableConsts.GETRANGE_MAX_VERSIONS) {
                  criteria.setMaxVersions(in.readInt());
              } else if (tag == WritableConsts.GETRANGE_TIME_RANGE) {
                  long start = in.readLong();
                  long end = in.readLong();
                  criteria.setTimeRange(new TimeRange(start, end));
              } else if (tag == WritableConsts.GETRANGE_CACHE_BLOCKS) {
                  criteria.setCacheBlocks(in.readBoolean());
              } else if (tag == WritableConsts.GETRANGE_START_COLUMN) {
                  criteria.setStartColumn(in.readUTF());
              } else if (tag == WritableConsts.GETRANGE_END_COLUMN) {
                  criteria.setEndColumn(in.readUTF());
              } else if (tag == WritableConsts.GETRANGE_LIMIT) {
                  criteria.setLimit(in.readInt());
              } else if (tag == WritableConsts.GETRANGE_BACKWARDS) {
                  criteria.setDirection(Direction.BACKWARD);
              } else if (tag == WritableConsts.GETRANGE_START_PKEY) {
                  PrimaryKeyWritable pkey = PrimaryKeyWritable.read(in);
                  criteria.setInclusiveStartPrimaryKey(pkey.getPrimaryKey());
              } else if (tag == WritableConsts.GETRANGE_END_PKEY) {
                  PrimaryKeyWritable pkey = PrimaryKeyWritable.read(in);
                  criteria.setExclusiveEndPrimaryKey(pkey.getPrimaryKey());
              } else if (tag == WritableConsts.FILTER) {
                  criteria.setFilter(FilterWritable.readFilter(in));
              } else {
                  if (tag != WritableConsts.GETRANGE_FINISH) {
                      throw new IOException("broken input stream");
                  }
                  break;
              }
          }
      }
  
      public static RangeRowQueryCriteriaWritable read(DataInput in) throws IOException {
          RangeRowQueryCriteriaWritable w = new RangeRowQueryCriteriaWritable();
          w.readFields(in);
          return w;
      }
  }
  
  