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/*
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* Coding User-Defined Types:
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* http://technet.microsoft.com/en-us/library/ms131069.aspx
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*
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*
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* TODO: add compatibility with normal SQL datatypes ? :
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* INSERT INTO [p2j_wrappers] VALUES (1) -----> 'Operand type clash: int is incompatible with P2JInt64'
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*/
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using System;
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using System.Data.SqlTypes;
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using Microsoft.SqlServer.Server;
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using System.Runtime.InteropServices;
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[Serializable()]
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//[SqlUserDefinedType(Format.Native)] // without 5: user-defined serialization
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[SqlUserDefinedType(Format.UserDefined, IsByteOrdered = true, MaxByteSize = 9)] // with 5: user-defined serialization
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//[StructLayout(LayoutKind.Sequential)] // TODO: is this attr useful ?
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public class P2JInt64 : INullable, IBinarySerialize
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{
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// 1. --------------------------- private data ------------------------------------------------
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private bool is_Null;
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private com.goldencode.p2j.util.int64 int64_value;
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// 2. --------------------------- handling null values ----------------------------------------
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public bool IsNull
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{
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get
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{
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return is_Null;
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}
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}
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public static P2JInt64 Null
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{
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get
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{
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P2JInt64 int64 = new P2JInt64();
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int64.is_Null = true;
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return int64;
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}
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}
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// 3. --------------------------- handling conversion to/from string --------------------------
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public override string ToString()
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{
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if (this.IsNull)
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{
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return "NULL";
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}
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else
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{
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// return bool_value.ToString(); -- this will return Yes / No, we rather prefer 0 / 1
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return int64_value.longValue().ToString();
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}
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}
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public static P2JInt64 Parse(SqlString s)
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{
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if (s.IsNull)
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{
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return Null;
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}
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// Parse input string here
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string str = Convert.ToString(s).Trim().ToLower();
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P2JInt64 int64 = new P2JInt64();
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int64.is_Null = false;
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int64.int64_value = new com.goldencode.p2j.util.int64(str);
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return int64;
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}
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// 4. --------------------------- UDT Method example ------------------------------------------
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[SqlMethod(IsDeterministic = true, IsMutator = false)]
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public P2JInt64 P2J_Add(P2JInt64 other)
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{
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P2JInt64 ret = new P2JInt64();
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ret.is_Null = false;
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ret.int64_value = com.goldencode.p2j.util.MathOps.plus(int64_value, other.int64_value);
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return ret;
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}
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[SqlMethod(IsDeterministic = true, IsMutator = false)]
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public P2JInt64 P2J_Add(long other)
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{
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P2JInt64 ret = new P2JInt64();
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ret.is_Null = false;
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ret.int64_value = com.goldencode.p2j.util.MathOps.plus(int64_value, other);
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return ret;
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}
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[SqlMethod(IsDeterministic = true, IsMutator = false)]
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public long value()
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{
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return int64_value.longValue();
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}
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// 5. --------------------------- user-defined serialization ----------------------------------
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// IBinarySerialize methods
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public void Write(System.IO.BinaryWriter w)
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{
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w.Write((byte) (this.IsNull ? 1 : 0));
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if (!this.IsNull)
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{
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w.Write(this.int64_value.longValue()); // 8 bytes
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}
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}
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public void Read(System.IO.BinaryReader r)
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{
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byte asByte = r.ReadByte();
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is_Null = (asByte == 1);
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if (is_Null)
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{
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int64_value = null;
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}
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else
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{
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int64_value = new com.goldencode.p2j.util.int64(r.ReadInt64());
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}
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}
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}
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