/*
Copyright (c) 2014 James Ahlborn

Licensed 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.healthmarketscience.jackcess.impl;

import java.io.IOException;

/**
 * ColumnImpl subclass which is used for Text data types.
 *
 * @author James Ahlborn
 * @usage _advanced_class_
 */
class TextColumnImpl extends ColumnImpl 
{
  /** whether or not they are compressed */ 
  private final boolean _compressedUnicode;
  /** the collating sort order for a text field */
  private final SortOrder _sortOrder;
  /** the code page for a text field (for certain db versions) */
  private final short _codePage;

  TextColumnImpl(InitArgs args) throws IOException
  {
    super(args);

      // co-located w/ precision/scale
      _sortOrder = readSortOrder(
          args.buffer, args.offset + getFormat().OFFSET_COLUMN_SORT_ORDER,
          getFormat());
      _codePage = readCodePage(args.buffer, args.offset, getFormat());

      _compressedUnicode = 
        ((args.extFlags & COMPRESSED_UNICODE_EXT_FLAG_MASK) != 0);
  }

  @Override
  public boolean isCompressedUnicode() {
    return _compressedUnicode;
  }
  
  @Override
  public short getTextCodePage() {
    return _codePage;
  }
  
  @Override
  public SortOrder getTextSortOrder() {
    return _sortOrder;
  }
}