190 lines
5.3 KiB
C#
190 lines
5.3 KiB
C#
using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Text;
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using ln.objects.catalog;
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namespace ln.types.odb.ng
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{
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public class Document : ODBEntity
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{
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public override ODBValue Identity => new ODBGuid(ID);
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private Dictionary<ODBEntity, ODBEntity> properties = new Dictionary<ODBEntity, ODBEntity>();
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public Document()
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:base(0x1001)
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{
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ID = Guid.NewGuid();
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}
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public Document(Guid id)
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:base(0x1001)
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{
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ID = id;
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}
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public Guid ID { get; }
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public DateTime StorageTimeStamp { get; set; }
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public Document(byte[] bytes)
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: this(bytes, 0, bytes.Length)
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{}
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public Document(byte[] bytes,int offset,int length)
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:this(new Guid(bytes.Slice(offset, 16)))
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{
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int endOffset = offset + length;
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offset += 16; // GUID (!!!) -> this(...)
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int nProps = BitConverter.ToInt32(bytes, offset);
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offset += 4;
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for (int n=0;n<nProps;n++)
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{
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ODBEntity propName = ODBEntity.Deserialize(bytes,ref offset);
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ODBEntity propValue = ODBEntity.Deserialize(bytes, ref offset);
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properties.Add(propName, propValue);
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}
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if (offset > endOffset)
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throw new FormatException("Document deserialization read behind end of buffer");
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}
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public ODBEntity this[ODBEntity propName]
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{
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get
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{
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if (properties.ContainsKey(propName))
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return properties[propName];
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return ODBNull.Instance;
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}
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set
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{
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if (ODBNull.Instance.Equals(value))
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{
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if (properties.ContainsKey(propName))
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properties.Remove(propName);
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}
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else
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{
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properties[propName] = value;
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}
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}
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}
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public ODBEntity this[string propName]
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{
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get => this[new ODBStringValue(propName)];
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set => this[new ODBStringValue(propName)] = value;
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}
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public IEnumerable<ODBEntity> Keys => properties.Keys;
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public bool Contains(string propName) => Contains(new ODBStringValue(propName));
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public bool Contains(ODBEntity propName)
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{
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return !ODBNull.Instance.Equals(this[propName]);
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}
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public override ODBEntity Clone()
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{
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Document clone = new Document(ID);
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clone.StorageTimeStamp = StorageTimeStamp;
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foreach (ODBEntity fieldName in properties.Keys)
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{
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clone[fieldName] = this[fieldName].Clone();
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}
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return clone;
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}
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public void CloneTo(Document target)
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{
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target.properties.Clear();
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target.StorageTimeStamp = StorageTimeStamp;
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foreach (ODBEntity fieldName in properties.Keys)
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{
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target[fieldName] = this[fieldName].Clone();
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}
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}
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public override byte[] GetStorageBytes()
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{
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MemoryStream stream = new MemoryStream();
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BinaryWriter writer = new BinaryWriter(stream);
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writer.Write(ID.ToByteArray());
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writer.Write(properties.Count);
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foreach (ODBEntity propName in properties.Keys)
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{
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ODBEntity propValue = properties[propName];
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propName.Write(writer);
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propValue.Write(writer);
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}
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return stream.ToArray();
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}
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public override string ToString()
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{
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return String.Format("[Document ID={0} {1}]", ID.ToString(),String.Join(" ",properties.Select(kv=> String.Format("{0}={1}",kv.Key,kv.Value))));
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}
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public override string ToTreeString(int indent)
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{
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indent += 2;
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StringBuilder stringBuilder = new StringBuilder();
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stringBuilder.AppendFormat("{0} Identity={1} Count={2}", GetType().Name, Identity, properties.Count);
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foreach (ODBValue key in properties.Keys)
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{
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stringBuilder.AppendLine();
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stringBuilder.AppendFormat("{0}{1,-32}: {2}", new String(' ', indent), key, properties[key].ToTreeString(indent));
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}
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return stringBuilder.ToString();
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}
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public override int GetHashCode()
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{
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return ID.GetHashCode();
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}
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public override bool Equals(object obj)
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{
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if (Equals(GetType(), obj.GetType()) && (obj is Document))
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{
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Document you = obj as Document;
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return ID.Equals(you.ID);
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}
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return false;
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}
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protected override int compare(ODBEntity e)
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{
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Document other = e as Document;
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ODBEntity[] keys = Keys.Union(other.Keys).ToArray();
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foreach (ODBEntity key in keys)
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{
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ODBEntity mine = this[key];
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ODBEntity yours = other[key];
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int c = mine.CompareTo(yours);
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if (c != 0)
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return c;
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}
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return 0;
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}
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public override T As<T>() => (T)Mapper.Default.UnmapValue(typeof(T), this);
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static Document()
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{
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RegisterDeserializer(0x1001, (b,o,l) => new Document(b,o,l));
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}
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}
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}
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