241 lines
9.1 KiB
C#
241 lines
9.1 KiB
C#
using System;
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using System.Linq;
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using System.Xml;
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using System.Collections.Generic;
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using DBCHM.PdmModels;
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namespace DBCHM.PDM
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{
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/// <summary>
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/// PDM实体集合
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/// </summary>
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public class PdmModels
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{
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public PdmModels()
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{
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this.Tables = new List<TableInfo>();
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}
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/// <summary>
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/// 表集合
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/// </summary>
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public IList<TableInfo> Tables { get; private set; }
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}
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public class PdmReader
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{
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/// <summary>
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/// 读取指定Pdm文件的实体集合
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/// </summary>
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/// <param name="pdmFile">Pdm文件名(全路径名)</param>
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/// <returns>实体集合</returns>
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public PdmModels ReadFromFile(string pdmFile)
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{
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if (string.IsNullOrEmpty(pdmFile))
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{
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return null;
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}
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//加载文件.
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var xmlDoc = new XmlDocument();
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xmlDoc.Load(pdmFile);
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//必须增加xml命名空间管理，否则读取会报错.
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var xmlnsManager = new XmlNamespaceManager(xmlDoc.NameTable);
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xmlnsManager.AddNamespace("a", "attribute");
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xmlnsManager.AddNamespace("c", "collection");
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xmlnsManager.AddNamespace("o", "object");
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var theModels = new PdmModels();
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//读取所有表节点
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var xnTablesList = xmlDoc.SelectNodes("//c:Tables", xmlnsManager);
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if (xnTablesList != null)
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foreach (var xnTable in from XmlNode xmlTables in xnTablesList from XmlNode xnTable in xmlTables.ChildNodes where xnTable.Name != "o:Shortcut" select xnTable)
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{
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theModels.Tables.Add(GetTable(xnTable));
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}
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return theModels;
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}
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//初始化"o:Table"的节点
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private TableInfo GetTable(XmlNode xnTable)
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{
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var mTable = new TableInfo();
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var xe = (XmlElement)xnTable;
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mTable.TableId = xe.GetAttribute("Id");
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var xnTProperty = xe.ChildNodes;
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foreach (XmlNode xnP in xnTProperty)
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{
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switch (xnP.Name)
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{
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case "a:ObjectID": mTable.ObjectID = xnP.InnerText;
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break;
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case "a:Name": mTable.Name = xnP.InnerText;
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break;
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case "a:Code": mTable.Code = xnP.InnerText;
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break;
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case "a:CreationDate": mTable.CreationDate = String2DateTime(xnP.InnerText);
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break;
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case "a:Creator": mTable.Creator = xnP.InnerText;
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break;
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case "a:ModificationDate": mTable.ModificationDate = String2DateTime(xnP.InnerText);
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break;
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case "a:Modifier": mTable.Modifier = xnP.InnerText;
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break;
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case "a:Comment": mTable.Comment = xnP.InnerText;
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break;
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case "a:PhysicalOptions": mTable.PhysicalOptions = xnP.InnerText;
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break;
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case "c:Columns": InitColumns(xnP, mTable);
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break;
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case "c:Keys": InitKeys(xnP, mTable);
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break;
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case "c:PrimaryKey":
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InitPrimaryKey(xnP, mTable);
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break;
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case "a:Description": mTable.Description = xnP.InnerText;
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break;
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}
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}
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return mTable;
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}
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//PDM文件中的日期格式采用的是当前日期与1970年1月1日8点之差的秒树来保存.
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private DateTime _baseDateTime = new DateTime(1970, 1, 1, 8, 0, 0);
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private DateTime String2DateTime(string dateString)
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{
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Int64 theTicker = Int64.Parse(dateString);
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return _baseDateTime.AddSeconds(theTicker);
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}
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//初始化"c:Columns"的节点
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private void InitColumns(XmlNode xnColumns, TableInfo pTable)
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{
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foreach (XmlNode xnColumn in xnColumns)
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{
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pTable.AddColumn(GetColumn(xnColumn, pTable));
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}
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}
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//初始化c:Keys"的节点
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private void InitKeys(XmlNode xnKeys, TableInfo pTable)
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{
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foreach (XmlNode xnKey in xnKeys)
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{
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pTable.AddKey(GetKey(xnKey, pTable));
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}
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}
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//初始化c:PrimaryKey"的节点
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private void InitPrimaryKey(XmlNode xnPrimaryKey, TableInfo pTable)
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{
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pTable.PrimaryKeyRefCode = GetPrimaryKey(xnPrimaryKey);
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}
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private static Boolean ConvertToBooleanPg(Object obj)
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{
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if (obj != null)
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{
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string mStr = obj.ToString();
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mStr = mStr.ToLower();
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if ((mStr.Equals("y") || mStr.Equals("1")) || mStr.Equals("true"))
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{
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return true;
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}
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}
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return false;
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}
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private ColumnInfo GetColumn(XmlNode xnColumn, TableInfo ownerTable)
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{
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var mColumn = new ColumnInfo(ownerTable);
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var xe = (XmlElement)xnColumn;
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mColumn.ColumnId = xe.GetAttribute("Id");
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var xnCProperty = xe.ChildNodes;
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foreach (XmlNode xnP in xnCProperty)
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{
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switch (xnP.Name)
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{
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case "a:ObjectID": mColumn.ObjectID = xnP.InnerText;
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break;
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case "a:Name": mColumn.Name = xnP.InnerText;
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break;
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case "a:Code": mColumn.Code = xnP.InnerText;
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break;
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case "a:CreationDate": mColumn.CreationDate = String2DateTime(xnP.InnerText);
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break;
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case "a:Creator": mColumn.Creator = xnP.InnerText;
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break;
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case "a:ModificationDate": mColumn.ModificationDate = String2DateTime(xnP.InnerText);
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break;
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case "a:Modifier": mColumn.Modifier = xnP.InnerText;
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break;
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case "a:Comment": mColumn.Comment = xnP.InnerText;
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break;
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case "a:DataType": mColumn.DataType = xnP.InnerText;
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break;
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case "a:Length": mColumn.Length = xnP.InnerText;
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break;
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case "a:Identity": mColumn.Identity = ConvertToBooleanPg(xnP.InnerText);
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break;
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case "a:Mandatory": mColumn.Mandatory = ConvertToBooleanPg(xnP.InnerText);
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break;
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case "a:PhysicalOptions": mColumn.PhysicalOptions = xnP.InnerText;
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break;
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case "a:ExtendedAttributesText": mColumn.ExtendedAttributesText = xnP.InnerText;
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break;
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case "a:Precision":
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mColumn.Precision = xnP.InnerText;
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break;
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}
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}
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return mColumn;
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}
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private string GetPrimaryKey(XmlNode xnKey)
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{
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var xe = (XmlElement)xnKey;
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if (xe.ChildNodes.Count <= 0) return "";
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var theKp = (XmlElement)xe.ChildNodes[0];
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return theKp.GetAttribute("Ref");
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}
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private void InitKeyColumns(XmlNode xnKeyColumns, PdmKey Key)
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{
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var xe = (XmlElement)xnKeyColumns;
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var xnKProperty = xe.ChildNodes;
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foreach (var theRef in from XmlNode xnP in xnKProperty select ((XmlElement)xnP).GetAttribute("Ref"))
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{
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Key.AddColumnObjCode(theRef);
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}
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}
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private PdmKey GetKey(XmlNode xnKey, TableInfo ownerTable)
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{
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var mKey = new PdmKey(ownerTable);
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var xe = (XmlElement)xnKey;
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mKey.KeyId = xe.GetAttribute("Id");
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var xnKProperty = xe.ChildNodes;
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foreach (XmlNode xnP in xnKProperty)
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{
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switch (xnP.Name)
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{
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case "a:ObjectID": mKey.ObjectID = xnP.InnerText;
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break;
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case "a:Name": mKey.Name = xnP.InnerText;
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break;
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case "a:Code": mKey.Code = xnP.InnerText;
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break;
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case "a:CreationDate": mKey.CreationDate = String2DateTime(xnP.InnerText);
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break;
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case "a:Creator": mKey.Creator = xnP.InnerText;
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break;
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case "a:ModificationDate": mKey.ModificationDate = String2DateTime(xnP.InnerText);
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break;
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case "a:Modifier": mKey.Modifier = xnP.InnerText;
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break;
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case "c:Key.Columns":
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InitKeyColumns(xnP, mKey);
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break;
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}
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}
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return mKey;
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}
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}
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}
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