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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 P2JLogical'
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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 = 1)] // with 5: user-defined serialization
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//[StructLayout(LayoutKind.Sequential)] // TODO: is this attr useful ?
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public class P2JLogical : 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.logical bool_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 P2JLogical Null
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{
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get
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{
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P2JLogical logical = new P2JLogical();
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logical.is_Null = true;
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return logical;
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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();
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}
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}
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public static P2JLogical 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).ToLower();
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P2JLogical logical = new P2JLogical();
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logical.is_Null = false;
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if (str == "0")
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{
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logical.bool_value = new com.goldencode.p2j.util.logical(false);
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}
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else if (str == "1")
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{
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logical.bool_value = new com.goldencode.p2j.util.logical(true);
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}
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else
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{
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logical.bool_value = new com.goldencode.p2j.util.logical(str);
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}
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return logical;
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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 P2JLogical P2J_And(P2JLogical other)
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{
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P2JLogical ret = new P2JLogical();
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ret.is_Null = false;
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ret.bool_value = new com.goldencode.p2j.util.logical(bool_value.booleanValue() & other.bool_value.booleanValue());
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return ret;
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}
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[SqlMethod(IsDeterministic = true, IsMutator = false)]
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public bool value()
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{
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return bool_value.booleanValue();
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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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if (this.IsNull)
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{
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w.Write((byte) 2);
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}
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else if (this.bool_value.booleanValue())
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{
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w.Write((byte) 1);
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}
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else
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{
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w.Write((byte) 0);
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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 == 2);
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if (is_Null)
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{
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bool_value = null;
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}
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else
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{
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bool_value = new com.goldencode.p2j.util.logical(asByte == 1);
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}
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}
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}
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