/* ====================================================================
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Licensed to the Apache Software Foundation (ASF) under one or more
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contributor license agreements. See the NOTICE file distributed with
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this work for Additional information regarding copyright ownership.
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The ASF licenses this file to You under the Apache License, Version 2.0
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(the "License"); you may not use this file except in compliance with
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the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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==================================================================== */
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/* ================================================================
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* About NPOI
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* Author: Tony Qu
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* Author's email: tonyqus (at) gmail.com
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* Author's Blog: tonyqus.wordpress.com.cn (wp.tonyqus.cn)
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* HomePage: http://www.codeplex.com/npoi
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* Contributors:
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*
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* ==============================================================*/
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using System;
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using System.Collections;
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using System.IO;
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using System.Collections.Generic;
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using HH.WMS.Utils.NPOI.POIFS.Properties;
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using HH.WMS.Utils.NPOI.POIFS.Common;
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namespace HH.WMS.Utils.NPOI.POIFS.Storage
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{
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/// <summary>
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/// A block of Property instances
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/// @author Marc Johnson (mjohnson at apache dot org)
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/// </summary>
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public class PropertyBlock : BigBlock
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{
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private class AnonymousProperty : Property
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{
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public override void PreWrite()
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{
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}
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public override bool IsDirectory
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{
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get
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{
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return false;
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}
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}
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}
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private Property[] _properties;
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/// <summary>
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/// Create a single instance initialized with default values
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/// </summary>
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/// <param name="properties">the properties to be inserted</param>
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/// <param name="offset">the offset into the properties array</param>
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protected PropertyBlock(POIFSBigBlockSize bigBlockSize, Property[] properties, int offset) : base(bigBlockSize)
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{
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_properties = new Property[ bigBlockSize.GetPropertiesPerBlock() ];
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for (int j = 0; j < _properties.Length; j++)
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{
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_properties[ j ] = properties[ j + offset ];
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}
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}
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/// <summary>
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/// Create an array of PropertyBlocks from an array of Property
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/// instances, creating empty Property instances to make up any
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/// shortfall
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/// </summary>
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/// <param name="properties">the Property instances to be converted into PropertyBlocks, in a java List</param>
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/// <returns>the array of newly created PropertyBlock instances</returns>
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public static BlockWritable [] CreatePropertyBlockArray( POIFSBigBlockSize bigBlockSize,
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List<Property> properties)
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{
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int _properties_per_block = bigBlockSize.GetPropertiesPerBlock();
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int blockCount = (properties.Count + _properties_per_block - 1) / _properties_per_block;
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Property[] toBeWritten = new Property[blockCount * _properties_per_block];
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System.Array.Copy(properties.ToArray(), 0, toBeWritten, 0, properties.Count);
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for (int i = properties.Count; i < toBeWritten.Length; i++)
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{
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toBeWritten[i] = new AnonymousProperty();
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}
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BlockWritable[] rvalue = new BlockWritable[blockCount];
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for (int i = 0; i < blockCount; i++)
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rvalue[i] = new PropertyBlock(bigBlockSize, toBeWritten, i * _properties_per_block);
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return rvalue;
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}
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/// <summary>
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/// Write the block's data to an OutputStream
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/// </summary>
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/// <param name="stream">the OutputStream to which the stored data should be written</param>
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public override void WriteData(Stream stream)
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{
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int _properties_per_block = bigBlockSize.GetPropertiesPerBlock();
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for (int i = 0; i < _properties_per_block; i++)
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_properties[i].WriteData(stream);
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}
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}
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}
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