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 org.apache.carbondata.core.indexstore;
  
  import java.util.ArrayList;
  import java.util.List;
  
  import org.apache.carbondata.core.constants.CarbonCommonConstants;
  import org.apache.carbondata.core.indexstore.row.IndexRow;
  import org.apache.carbondata.core.indexstore.schema.CarbonRowSchema;
  import org.apache.carbondata.core.util.DataTypeUtil;
  
  /**
   * Store the index row @{@link IndexRow} data to memory.
   */
  public class SafeMemoryDMStore extends AbstractMemoryDMStore {
  
    /**
     * holds all blocklets metadata in memory
     */
    private List<IndexRow> indexRows =
        new ArrayList<>(CarbonCommonConstants.DEFAULT_COLLECTION_SIZE);
  
    private int runningLength;
  
    /**
     * Add the index row to indexRows, basically to in memory.
     *
     * @param indexRow
     * @return
     */
    @Override
    public void addIndexRow(CarbonRowSchema[] schema, IndexRow indexRow) {
      indexRows.add(indexRow);
      runningLength += indexRow.getTotalSizeInBytes();
    }
  
    @Override
    public IndexRow getIndexRow(CarbonRowSchema[] schema, int index) {
      assert (index < indexRows.size());
      return indexRows.get(index);
    }
  
    @Override
    public void freeMemory() {
      if (!isMemoryFreed) {
        if (null != indexRows) {
          indexRows.clear();
        }
        isMemoryFreed = true;
      }
    }
  
    @Override
    public int getMemoryUsed() {
      return runningLength;
    }
  
    @Override
    public int getRowCount() {
      return indexRows.size();
    }
  
    @Override
    public UnsafeMemoryDMStore convertToUnsafeDMStore(CarbonRowSchema[] schema) {
      setSchemaDataType(schema);
      UnsafeMemoryDMStore unsafeMemoryDMStore = new UnsafeMemoryDMStore();
      for (IndexRow indexRow : indexRows) {
        indexRow.setSchemas(schema);
        unsafeMemoryDMStore.addIndexRow(schema, indexRow);
      }
      unsafeMemoryDMStore.finishWriting();
      return unsafeMemoryDMStore;
    }
  
    /**
     * Set the dataType to the schema. Needed in case of serialization / deserialization
     */
    private void setSchemaDataType(CarbonRowSchema[] schema) {
      for (CarbonRowSchema carbonRowSchema : schema) {
        carbonRowSchema.setDataType(DataTypeUtil.valueOf(carbonRowSchema.getDataType(), 0, 0));
      }
    }
  
  }