using System;
using System.Collections.Generic;
using System.Data.SqlTypes;
using System.IO;
using Microsoft.SqlServer.Server;

[Serializable]
[SqlUserDefinedAggregate(Format.UserDefined, MaxByteSize = 8000)]
public struct strconcat : IBinarySerialize
{
    private List values;

    public void Init()
    {
        this.values = new List();
    }

    public void Accumulate(SqlString value)
    {
        this.values.Add(value.Value);
    }

    public void Merge(strconcat value)
    {
        this.values.AddRange(value.values.ToArray());
    }

    public SqlString Terminate()
    {
        return new SqlString(string.Join(", ", this.values.ToArray()));
    }

    public void Read(BinaryReader r)
    {
        int itemCount = r.ReadInt32();
        this.values = new List(itemCount);
        for (int i = 0; i <= itemCount - 1; i++)
        {
            this.values.Add(r.ReadString());
        }
    }

    public void Write(BinaryWriter w)
    {
        w.Write(this.values.Count);
        foreach (string s in this.values)
        {
            w.Write(s);
        }
    }
}