/* ====================================================================
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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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namespace HH.WMS.Utils.NPOI.HPSF.Extractor
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{
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using System;
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using System.Text;
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using System.IO;
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using System.Collections;
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using HH.WMS.Utils.NPOI;
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using HH.WMS.Utils.NPOI.HPSF;
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using HH.WMS.Utils.NPOI.POIFS.FileSystem;
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using HH.WMS.Utils.NPOI.Util;
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using System.Globalization;
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/// <summary>
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/// Extracts all of the HPSF properties, both
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/// build in and custom, returning them in
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/// textual form.
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/// </summary>
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public class HPSFPropertiesExtractor : POITextExtractor
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{
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public HPSFPropertiesExtractor(POITextExtractor mainExtractor)
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: base(mainExtractor)
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{
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}
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public HPSFPropertiesExtractor(POIDocument doc)
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: base(doc)
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{
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}
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public HPSFPropertiesExtractor(POIFSFileSystem fs)
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: base(new PropertiesOnlyDocument(fs))
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{
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}
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/// <summary>
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/// Gets the document summary information text.
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/// </summary>
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/// <value>The document summary information text.</value>
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public String DocumentSummaryInformationText
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{
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get
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{
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DocumentSummaryInformation dsi = document.DocumentSummaryInformation;
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StringBuilder text = new StringBuilder();
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// Normal properties
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text.Append(GetPropertiesText(dsi));
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// Now custom ones
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CustomProperties cps = dsi == null ? null : dsi.CustomProperties;
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if (cps != null)
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{
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IEnumerator keys = cps.NameSet().GetEnumerator();
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while (keys.MoveNext())
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{
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String key = keys.Current.ToString();
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String val = GetPropertyValueText(cps[key]);
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text.Append(key + " = " + val + "\n");
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}
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}
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// All done
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return text.ToString();
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}
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}
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/// <summary>
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/// Gets the summary information text.
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/// </summary>
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/// <value>The summary information text.</value>
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public String SummaryInformationText
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{
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get
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{
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SummaryInformation si = document.SummaryInformation;
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// Just normal properties
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return GetPropertiesText(si);
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}
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}
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/// <summary>
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/// Gets the properties text.
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/// </summary>
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/// <param name="ps">The ps.</param>
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/// <returns></returns>
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private static String GetPropertiesText(SpecialPropertySet ps)
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{
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if (ps == null)
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{
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// Not defined, oh well
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return "";
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}
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StringBuilder text = new StringBuilder();
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Wellknown.PropertyIDMap idMap = ps.PropertySetIDMap;
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Property[] props = ps.Properties;
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for (int i = 0; i < props.Length; i++)
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{
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String type = props[i].ID.ToString(CultureInfo.InvariantCulture);
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Object typeObj = idMap.Get(props[i].ID);
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if (typeObj != null)
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{
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type = typeObj.ToString();
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}
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String val = GetPropertyValueText(props[i].Value);
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text.Append(type + " = " + val + "\n");
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}
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return text.ToString();
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}
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/// <summary>
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/// Gets the property value text.
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/// </summary>
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/// <param name="val">The val.</param>
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/// <returns></returns>
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private static String GetPropertyValueText(Object val)
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{
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if (val == null)
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{
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return "(not set)";
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}
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if (val is byte[])
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{
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byte[] b = (byte[])val;
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if (b.Length == 0)
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{
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return "";
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}
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if (b.Length == 1)
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{
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return b[0].ToString(CultureInfo.InvariantCulture);
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}
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if (b.Length == 2)
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{
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return LittleEndian.GetUShort(b).ToString(CultureInfo.InvariantCulture);
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}
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if (b.Length == 4)
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{
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return LittleEndian.GetUInt(b).ToString(CultureInfo.InvariantCulture);
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}
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// Maybe it's a string? who knows!
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return b.ToString();
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}
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return val.ToString();
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}
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/// <summary>
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/// Return the text of all the properties defined in
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/// the document.
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/// </summary>
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/// <value>All the text from the document.</value>
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public override String Text
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{
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get
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{
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return SummaryInformationText + DocumentSummaryInformationText;
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}
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}
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/// <summary>
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/// Returns another text extractor, which is able to
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/// output the textual content of the document
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/// metadata / properties, such as author and title.
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/// </summary>
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/// <value>The metadata text extractor.</value>
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public override POITextExtractor MetadataTextExtractor
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{
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get
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{
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throw new InvalidOperationException("You already have the Metadata Text Extractor, not recursing!");
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}
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}
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/// <summary>
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/// So we can get at the properties of any
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/// random OLE2 document.
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/// </summary>
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private class PropertiesOnlyDocument : POIDocument
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{
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public PropertiesOnlyDocument(POIFSFileSystem fs)
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: base(fs)
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{
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}
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public override void Write(Stream out1)
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{
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throw new InvalidOperationException("Unable to write, only for properties!");
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}
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}
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}
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}
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