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.datastore.page;
  
  import java.math.BigDecimal;
  
  import org.apache.carbondata.core.datastore.page.encoding.ColumnPageEncoderMeta;
  import org.apache.carbondata.core.memory.CarbonUnsafe;
  import org.apache.carbondata.core.memory.UnsafeMemoryManager;
  import org.apache.carbondata.core.metadata.datatype.DataTypes;
  
  /**
   * This extension uses unsafe memory to store page data, for variable length data type (string)
   */
  public class UnsafeVarLengthColumnPage extends UnsafeVarLengthColumnPageBase {
  
    /**
     * create a page
     */
    UnsafeVarLengthColumnPage(ColumnPageEncoderMeta columnPageEncoderMeta, int pageSize) {
      super(columnPageEncoderMeta, pageSize);
      if (columnPageEncoderMeta.getStoreDataType() == DataTypes.BINARY) {
        capacity = (int) (pageSize * DEFAULT_BINARY_SIZE * FACTOR);
      } else {
        capacity = (int) (pageSize * DEFAULT_ROW_SIZE * FACTOR);
      }
      memoryBlock = UnsafeMemoryManager.allocateMemoryWithRetry(taskId, capacity);
      baseAddress = memoryBlock.getBaseObject();
      baseOffset = memoryBlock.getBaseOffset();
    }
  
    @Override
    public void freeMemory() {
      if (memoryBlock != null) {
        UnsafeMemoryManager.INSTANCE.freeMemory(taskId, memoryBlock);
        memoryBlock = null;
        baseAddress = null;
        baseOffset = 0;
        super.freeMemory();
      }
    }
  
    @Override
    public void putBytesAtRow(int rowId, byte[] bytes) {
      putBytes(rowId, bytes, 0, bytes.length);
    }
  
    @Override
    public void putBytes(int rowId, byte[] bytes, int offset, int length) {
      ensureMemory(length);
      CarbonUnsafe.getUnsafe().copyMemory(bytes, CarbonUnsafe.BYTE_ARRAY_OFFSET + offset,
          baseAddress, baseOffset + rowOffset.getInt(rowId), length);
    }
  
    @Override
    public void setByteArrayPage(byte[][] byteArray) {
      if (totalLength != 0) {
        throw new IllegalStateException("page is not empty");
      }
      for (int i = 0; i < byteArray.length; i++) {
        putBytes(i, byteArray[i]);
      }
    }
  
    @Override
    public void putDecimal(int rowId, BigDecimal decimal) {
  
    }
  
    @Override
    public BigDecimal getDecimal(int rowId) {
      throw new UnsupportedOperationException(
          "invalid data type: " + columnPageEncoderMeta.getStoreDataType());
    }
  
    @Override
    public byte[] getBytes(int rowId) {
      int length = rowOffset.getInt(rowId + 1) - rowOffset.getInt(rowId);
      byte[] bytes = new byte[length];
      CarbonUnsafe.getUnsafe().copyMemory(baseAddress, baseOffset + rowOffset.getInt(rowId),
          bytes, CarbonUnsafe.BYTE_ARRAY_OFFSET, length);
      return bytes;
    }
  
    @Override
    public byte[][] getByteArrayPage() {
      byte[][] bytes = new byte[rowOffset.getActualRowCount() - 1][];
      for (int rowId = 0; rowId < rowOffset.getActualRowCount() - 1; rowId++) {
        int length = rowOffset.getInt(rowId + 1) - rowOffset.getInt(rowId);
        byte[] rowData = new byte[length];
        CarbonUnsafe.getUnsafe().copyMemory(baseAddress, baseOffset + rowOffset.getInt(rowId),
            rowData, CarbonUnsafe.BYTE_ARRAY_OFFSET, length);
        bytes[rowId] = rowData;
      }
      return bytes;
    }
  
    @Override
    void copyBytes(int rowId, byte[] dest, int destOffset, int length) {
      CarbonUnsafe.getUnsafe().copyMemory(baseAddress, baseOffset + rowOffset.getInt(rowId),
          dest, CarbonUnsafe.BYTE_ARRAY_OFFSET + destOffset, length);
    }
  
  }
  