/* ==================================================================== 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. ==================================================================== */ /* ================================================================ * About NPOI * Author: Tony Qu * Author's email: tonyqus (at) gmail.com * Author's Blog: tonyqus.wordpress.com.cn (wp.tonyqus.cn) * HomePage: http://www.codeplex.com/npoi * Contributors: * * ==============================================================*/ using System; using System.Collections.Generic; using System.IO; using System.Collections; using HH.WMS.Utils.NPOI.POIFS.Common; using HH.WMS.Utils.NPOI.POIFS.Properties; using HH.WMS.Utils.NPOI.POIFS.FileSystem; namespace HH.WMS.Utils.NPOI.POIFS.Storage { /// /// This class implements reading the small document block list from an /// existing file /// @author Marc Johnson (mjohnson at apache dot org) /// public class SmallBlockTableWriter : BlockWritable, BATManaged { private BlockAllocationTableWriter _sbat; private IList _small_blocks; private int _big_block_count; private RootProperty _root; /// /// Initializes a new instance of the class. /// /// a IList of POIFSDocument instances /// the Filesystem's root property public SmallBlockTableWriter(POIFSBigBlockSize bigBlockSize, IList documents, RootProperty root) { _sbat = new BlockAllocationTableWriter(bigBlockSize); _small_blocks = new ArrayList(); _root = root; IEnumerator iter = documents.GetEnumerator(); while (iter.MoveNext()) { POIFSDocument doc = ( POIFSDocument ) iter.Current; BlockWritable[] blocks = doc.SmallBlocks; if (blocks.Length != 0) { doc.StartBlock=_sbat.AllocateSpace(blocks.Length); for (int j = 0; j < blocks.Length; j++) { _small_blocks.Add(blocks[ j ]); } } else { doc.StartBlock=POIFSConstants.END_OF_CHAIN; } } _sbat.SimpleCreateBlocks(); _root.Size=_small_blocks.Count; _big_block_count = SmallDocumentBlock.Fill(bigBlockSize, _small_blocks); } /// /// Get the number of SBAT blocks /// /// number of SBAT big blocks public int SBATBlockCount { get { return (_big_block_count + 15) / 16; } } /// /// Gets the SBAT. /// /// the Small Block Allocation Table public BlockAllocationTableWriter SBAT { get { return _sbat; } } /// /// Return the number of BigBlock's this instance uses /// /// count of BigBlock instances public int CountBlocks { get{return _big_block_count;} } /// /// Sets the start block. /// /// The start block. public int StartBlock { set { _root.StartBlock=value; } } /// /// Write the storage to an OutputStream /// /// the OutputStream to which the stored data should be written public void WriteBlocks(Stream stream) { IEnumerator iter = _small_blocks.GetEnumerator(); while (iter.MoveNext()) { (( BlockWritable ) iter.Current).WriteBlocks(stream); } } } }