/// <exception cref="System.SqlSyntaxErrorException" />
public override void Process(CobarHint hint, string hintName, string sql)
{
var value = ParsePrimary(hint, sql);
if (value is long)
{
value = (long)value;
}
//var properties = new Dictionary<string, object>(1);
//properties[hintName] = value;
try
{
switch (hintName)
{
case "table":
hint.Table = value as string;
break;
case "replica":
hint.Replica = Convert.ToInt32(value);
break;
default:
throw new NotSupportedException(string.Format("hintName:{0},value:{1}", hintName, value));
}
//INFO---SimpleHintParser
//ParameterMapping.Mapping(hint, properties);
}
catch (Exception t)
{
throw new SqlSyntaxErrorException(t);
}
}
/// <exception cref="System.SqlSyntaxErrorException" />
public override void Process(CobarHint hint, string hintName, string sql)
{
var value = ParsePrimary(hint, sql);
if (value is long)
{
value = (long)value;
}
//var properties = new Dictionary<string, object>(1);
//properties[hintName] = value;
try
{
switch (hintName)
{
case "table":
hint.Table = value as string;
break;
case "replica":
hint.Replica = Convert.ToInt32(value);
break;
default:
throw new NotSupportedException(string.Format("hintName:{0},value:{1}", hintName, value));
}
//INFO---SimpleHintParser
//ParameterMapping.Mapping(hint, properties);
}
catch (Exception t)
{
throw new SqlSyntaxErrorException(t);
}
}
private void SkipSpace(CobarHint hint, string sql)
{
var ci = hint.CurrentIndex;
for (;;)
{
switch (sql[ci])
{
case ' ':
case '\t':
case '\n':
case '\r':
{
hint.IncreaseCurrentIndex();
++ci;
break;
}
default:
{
goto skip_break;
}
}
}
skip_break:
;
}
/// <exception cref="System.SqlSyntaxErrorException" />
public override void Process(CobarHint hint, string hintName, string sql)
{
Pair <int, int> pair = null;
if (CurrentChar(hint, sql) == '[')
{
for (;;)
{
NextChar(hint, sql);
pair = ParseDataNode(hint, sql);
hint.AddDataNode(pair.Key, pair.Value);
switch (CurrentChar(hint, sql))
{
case ',':
{
continue;
}
case ']':
{
NextChar(hint, sql);
return;
}
default:
{
throw new SqlSyntaxErrorException("err for dataNodeId: " + sql);
}
}
}
}
pair = ParseDataNode(hint, sql);
hint.AddDataNode(pair.Key, pair.Value);
}
/// <summary>first char is not separator</summary>
private Pair <int, int> ParseDataNode(CobarHint hint, string sql)
{
var start = hint.CurrentIndex;
var ci = start;
for (; IsDigit(sql[ci]); ++ci)
{
}
var nodeIndex = Convert.ToInt32(Runtime.Substring(sql, start, ci));
var replica = RouteResultsetNode.DefaultReplicaIndex;
hint.CurrentIndex = ci;
if (CurrentChar(hint, sql) == '.')
{
NextChar(hint, sql);
start = hint.CurrentIndex;
ci = start;
for (; IsDigit(sql[ci]); ++ci)
{
}
replica = Convert.ToInt32(Runtime.Substring(sql, start, ci));
hint.CurrentIndex = ci;
}
return(new Pair <int, int>(nodeIndex, replica));
}
/// <exception cref="System.SqlSyntaxErrorException" />
public override void Process(CobarHint hint, string hintName, string sql)
{
Pair<int, int> pair = null;
if (CurrentChar(hint, sql) == '[')
{
for (;;)
{
NextChar(hint, sql);
pair = ParseDataNode(hint, sql);
hint.AddDataNode(pair.Key, pair.Value);
switch (CurrentChar(hint, sql))
{
case ',':
{
continue;
}
case ']':
{
NextChar(hint, sql);
return;
}
default:
{
throw new SqlSyntaxErrorException("err for dataNodeId: " + sql);
}
}
}
}
pair = ParseDataNode(hint, sql);
hint.AddDataNode(pair.Key, pair.Value);
}
private void SkipSpace(CobarHint hint, string sql)
{
var ci = hint.CurrentIndex;
for (;;)
{
switch (sql[ci])
{
case ' ':
case '\t':
case '\n':
case '\r':
{
hint.IncreaseCurrentIndex();
++ci;
break;
}
default:
{
goto skip_break;
}
}
}
skip_break:
;
}
/// <exception cref="System.SqlSyntaxErrorException" />
public override void Process(CobarHint hint, string hintName, string sql)
{
string[] columns;
if (NextChar(hint, sql) == '[')
{
hint.IncreaseCurrentIndex();
columns = Convert2String(ParseArray(hint, sql, -1));
}
else
{
columns = new string[1];
columns[0] = (string)ParsePrimary(hint, sql);
}
object[][] values;
switch (NextChar(hint, sql))
{
case '[':
{
if (columns.Length == 1)
{
hint.IncreaseCurrentIndex();
var vs = ParseArray(hint, sql, -1);
values = new object[vs.Length][];
for (var i = 0; i < vs.Length; ++i)
{
values[i] = new object[1] {
vs[i]
};
//values[i][0] = vs[i];
}
}
else
{
values = ParseArrayArray(hint, sql, columns.Length);
}
break;
}
default:
{
if (columns.Length == 1)
{
values = new object[1][] { new object[1] };
values[0][0] = ParsePrimary(hint, sql);
}
else
{
throw new SqlSyntaxErrorException("err for partitionOperand: " + sql);
}
break;
}
}
hint.PartitionOperand = new Pair <string[], object[][]>(columns, values);
if (CurrentChar(hint, sql) == ')')
{
hint.IncreaseCurrentIndex();
}
}
/// <exception cref="System.SqlSyntaxErrorException" />
public override void Process(CobarHint hint, string hintName, string sql)
{
string[] columns;
if (NextChar(hint, sql) == '[')
{
hint.IncreaseCurrentIndex();
columns = Convert2String(ParseArray(hint, sql, -1));
}
else
{
columns = new string[1];
columns[0] = (string)ParsePrimary(hint, sql);
}
object[][] values;
switch (NextChar(hint, sql))
{
case '[':
{
if (columns.Length == 1)
{
hint.IncreaseCurrentIndex();
var vs = ParseArray(hint, sql, -1);
values = new object[vs.Length][];
for (var i = 0; i < vs.Length; ++i)
{
values[i] = new object[1] {vs[i]};
//values[i][0] = vs[i];
}
}
else
{
values = ParseArrayArray(hint, sql, columns.Length);
}
break;
}
default:
{
if (columns.Length == 1)
{
values = new object[1][] {new object[1]};
values[0][0] = ParsePrimary(hint, sql);
}
else
{
throw new SqlSyntaxErrorException("err for partitionOperand: " + sql);
}
break;
}
}
hint.PartitionOperand = new Pair<string[], object[][]>(columns, values);
if (CurrentChar(hint, sql) == ')')
{
hint.IncreaseCurrentIndex();
}
}
// index start from 1
// /*!cobar: $dataNodeId=0.0, $_table='offer'*/
// /*!cobar: $dataNodeId=[0,1,5.2], $_table='offer'*/
// /*!cobar: $_partitionOperand=('member_id'='m1'), $_table='offer'*/
// /*!cobar: $_partitionOperand=('member_id'=['m1','m2']), $_table='offer',
// $_replica=2*/
// /*!cobar: $_partitionOperand=(['offer_id','group_id']=[123,'3c']),
// $_table='offer'*/
// /*!cobar:
// $_partitionOperand=(['offer_id','group_id']=[[123,'3c'],[234,'food']]),
// $_table='offer'*/
/// <param name="offset">
/// index of first char of
/// <see cref="CobarHintPrefix" />
/// </param>
/// <exception cref="System.SqlSyntaxErrorException" />
public static CobarHint ParserCobarHint(string sql, int offset)
{
var hint = new CobarHint
{
CurrentIndex = offset + CobarHintPrefix.Length
};
hint.Parse(sql);
return(hint);
}
/// <summary>
/// current char is char after '[', after call, current char is char after
/// ']'
/// </summary>
/// <param name="len">less than 0 for array length unknown</param>
/// <exception cref="System.SqlSyntaxErrorException" />
private object[] ParseArray(CobarHint hint, string sql, int len)
{
object[] rst = null;
IList <object> list = null;
if (len >= 0)
{
rst = new object[len];
}
else
{
list = new List <object>();
}
for (var i = 0;; ++i)
{
var obj = ParsePrimary(hint, sql);
if (len >= 0)
{
rst[i] = obj;
}
else
{
list.Add(obj);
}
switch (CurrentChar(hint, sql))
{
case ']':
{
hint.IncreaseCurrentIndex();
if (len >= 0)
{
return(rst);
}
return(list.ToArray());
}
case ',':
{
hint.IncreaseCurrentIndex();
break;
}
default:
{
throw new SqlSyntaxErrorException("err for partitionOperand array: " + sql);
}
}
}
}
/// <summary>first char is not separator</summary>
private Pair<int, int> ParseDataNode(CobarHint hint, string sql)
{
var start = hint.CurrentIndex;
var ci = start;
for (; IsDigit(sql[ci]); ++ci)
{
}
var nodeIndex = Convert.ToInt32(Runtime.Substring(sql, start, ci));
var replica = RouteResultsetNode.DefaultReplicaIndex;
hint.CurrentIndex = ci;
if (CurrentChar(hint, sql) == '.')
{
NextChar(hint, sql);
start = hint.CurrentIndex;
ci = start;
for (; IsDigit(sql[ci]); ++ci)
{
}
replica = Convert.ToInt32(Runtime.Substring(sql, start, ci));
hint.CurrentIndex = ci;
}
return new Pair<int, int>(nodeIndex, replica);
}
/// <summary>current char is '[[', after call, current char is char after ']]'</summary>
/// <exception cref="System.SqlSyntaxErrorException" />
private object[][] ParseArrayArray(CobarHint hint, string sql, int columnNum)
{
if (NextChar(hint, sql) == '[')
{
IList <object[]> list = new List <object[]>();
for (;;)
{
NextChar(hint, sql);
list.Add(ParseArray(hint, sql, columnNum));
var c = CurrentChar(hint, sql);
switch (c)
{
case ']':
{
hint.IncreaseCurrentIndex();
return(list.ToArray());
}
case ',':
{
NextChar(hint, sql);
break;
}
default:
{
throw new SqlSyntaxErrorException("err for partitionOperand array[]: " + sql);
}
}
}
}
var rst = new[] { new object[columnNum] };
rst[0] = ParseArray(hint, sql, columnNum);
return(rst);
}
/// <exception cref="System.SqlSyntaxErrorException" />
protected internal virtual object ParsePrimary(CobarHint hint, string sql)
{
var c = CurrentChar(hint, sql);
var ci = hint.CurrentIndex;
switch (c)
{
case '\'':
{
var sb = new StringBuilder();
for (++ci;; ++ci)
{
c = sql[ci];
switch (c)
{
case '\'':
{
hint.CurrentIndex = ci + 1;
return(sb.ToString());
}
case '\\':
{
c = sql[++ci];
goto default;
}
default:
{
sb.Append(c);
break;
}
}
}
#pragma warning disable CS0162 // 检测到无法访问的代码
goto case 'n';
#pragma warning restore CS0162 // 检测到无法访问的代码
}
case 'n':
case 'N':
{
hint.CurrentIndex = ci + "null".Length;
return(null);
}
default:
{
if (IsDigit(c))
{
var start = ci++;
for (; IsDigit(sql[ci]); ++ci)
{
}
hint.CurrentIndex = ci;
return(long.Parse(Runtime.Substring(sql, start, ci)));
}
throw new SqlSyntaxErrorException("unknown primary in hint: " + sql);
}
}
}
protected internal virtual char CurrentChar(CobarHint hint, string sql)
{
SkipSpace(hint, sql);
return sql[hint.CurrentIndex];
}
protected internal virtual char CurrentChar(CobarHint hint, string sql)
{
SkipSpace(hint, sql);
return(sql[hint.CurrentIndex]);
}
/// <summary> /// hint's /// <see cref="CobarHint.GetCurrentIndex()" /> /// will be changed to index of /// next char after process /// </summary> /// <exception cref="System.SqlSyntaxErrorException" /> public abstract void Process(CobarHint hint, string hintName, string sql);
/// <summary>current char is not separator</summary>
protected internal virtual char NextChar(CobarHint hint, string sql)
{
SkipSpace(hint, sql);
SkipSpace(hint.IncreaseCurrentIndex(), sql);
return(sql[hint.CurrentIndex]);
}
/// <exception cref="System.SqlSyntaxErrorException" />
protected internal virtual object ParsePrimary(CobarHint hint, string sql)
{
var c = CurrentChar(hint, sql);
var ci = hint.CurrentIndex;
switch (c)
{
case '\'':
{
var sb = new StringBuilder();
for (++ci;; ++ci)
{
c = sql[ci];
switch (c)
{
case '\'':
{
hint.CurrentIndex = ci + 1;
return sb.ToString();
}
case '\\':
{
c = sql[++ci];
goto default;
}
default:
{
sb.Append(c);
break;
}
}
}
#pragma warning disable CS0162 // 检测到无法访问的代码
goto case 'n';
#pragma warning restore CS0162 // 检测到无法访问的代码
}
case 'n':
case 'N':
{
hint.CurrentIndex = ci + "null".Length;
return null;
}
default:
{
if (IsDigit(c))
{
var start = ci++;
for (; IsDigit(sql[ci]); ++ci)
{
}
hint.CurrentIndex = ci;
return long.Parse(Runtime.Substring(sql, start, ci));
}
throw new SqlSyntaxErrorException("unknown primary in hint: " + sql);
}
}
}
/// <summary> /// hint's /// <see cref="CobarHint.GetCurrentIndex()" /> /// will be changed to index of /// next char after process /// </summary> /// <exception cref="System.SqlSyntaxErrorException" /> public abstract void Process(CobarHint hint, string hintName, string sql);
/// <summary>current char is '[[', after call, current char is char after ']]'</summary>
/// <exception cref="System.SqlSyntaxErrorException" />
private object[][] ParseArrayArray(CobarHint hint, string sql, int columnNum)
{
if (NextChar(hint, sql) == '[')
{
IList<object[]> list = new List<object[]>();
for (;;)
{
NextChar(hint, sql);
list.Add(ParseArray(hint, sql, columnNum));
var c = CurrentChar(hint, sql);
switch (c)
{
case ']':
{
hint.IncreaseCurrentIndex();
return list.ToArray();
}
case ',':
{
NextChar(hint, sql);
break;
}
default:
{
throw new SqlSyntaxErrorException("err for partitionOperand array[]: " + sql);
}
}
}
}
var rst = new[] {new object[columnNum]};
rst[0] = ParseArray(hint, sql, columnNum);
return rst;
}
/// <summary>current char is not separator</summary>
protected internal virtual char NextChar(CobarHint hint, string sql)
{
SkipSpace(hint, sql);
SkipSpace(hint.IncreaseCurrentIndex(), sql);
return sql[hint.CurrentIndex];
}
// index start from 1
// /*!cobar: $dataNodeId=0.0, $_table='offer'*/
// /*!cobar: $dataNodeId=[0,1,5.2], $_table='offer'*/
// /*!cobar: $_partitionOperand=('member_id'='m1'), $_table='offer'*/
// /*!cobar: $_partitionOperand=('member_id'=['m1','m2']), $_table='offer',
// $_replica=2*/
// /*!cobar: $_partitionOperand=(['offer_id','group_id']=[123,'3c']),
// $_table='offer'*/
// /*!cobar:
// $_partitionOperand=(['offer_id','group_id']=[[123,'3c'],[234,'food']]),
// $_table='offer'*/
/// <param name="offset">
/// index of first char of
/// <see cref="CobarHintPrefix" />
/// </param>
/// <exception cref="System.SqlSyntaxErrorException" />
public static CobarHint ParserCobarHint(string sql, int offset)
{
var hint = new CobarHint
{
CurrentIndex = offset + CobarHintPrefix.Length
};
hint.Parse(sql);
return hint;
}
/// <summary>
/// current char is char after '[', after call, current char is char after
/// ']'
/// </summary>
/// <param name="len">less than 0 for array length unknown</param>
/// <exception cref="System.SqlSyntaxErrorException" />
private object[] ParseArray(CobarHint hint, string sql, int len)
{
object[] rst = null;
IList<object> list = null;
if (len >= 0)
{
rst = new object[len];
}
else
{
list = new List<object>();
}
for (var i = 0;; ++i)
{
var obj = ParsePrimary(hint, sql);
if (len >= 0)
{
rst[i] = obj;
}
else
{
list.Add(obj);
}
switch (CurrentChar(hint, sql))
{
case ']':
{
hint.IncreaseCurrentIndex();
if (len >= 0)
return rst;
return list.ToArray();
}
case ',':
{
hint.IncreaseCurrentIndex();
break;
}
default:
{
throw new SqlSyntaxErrorException("err for partitionOperand array: " + sql);
}
}
}
}
