/// <summary>
/// Parses the current JsonTableSchema information contained in the JsonDataSetSchema data stream linked to the JsonDataSetSchemaParser
/// class. The function will read the table schema data at the current position of the data stream into the JsonTableSchema object
/// passed to the function. This data can then be used to initialize the schema of a DataTable object.
/// </summary>
/// <param name="schemaJsonTable">The JsonTableSchema object that will </param>
/// <param name="iCurParseIndex">The current index of the JsonDataSetSchema data stream being parsed.</param>
/// <returns></returns>
protected virtual bool ParseJsonTableSchema(ref JsonTableSchema schemaJsonTable, ref int iCurParseIndex)
{
try
{
schemaJsonTable = new JsonTableSchema();
string strExtractData = "";
int iEndParseIndex = 0;
bool blTableSchemaFound = true;
iCurParseIndex = m_strJsonDSSchema.IndexOf("\"Table\"", iCurParseIndex, StringComparison.OrdinalIgnoreCase);
iCurParseIndex = m_strJsonDSSchema.IndexOf(":", iCurParseIndex);
iCurParseIndex = m_strJsonDSSchema.IndexOf('\"', iCurParseIndex) + 1;
iEndParseIndex = m_strJsonDSSchema.IndexOf('\"', iCurParseIndex);
//Extracts the name of the table.
strExtractData = m_strJsonDSSchema.Substring(iCurParseIndex, iEndParseIndex - iCurParseIndex);
schemaJsonTable.TableName = strExtractData;
iCurParseIndex = m_strJsonDSSchema.IndexOf("\"Columns\"", iCurParseIndex, StringComparison.OrdinalIgnoreCase);
iCurParseIndex = m_strJsonDSSchema.IndexOf(':', iCurParseIndex) + 1;
if (m_strJsonDSSchema.IndexOf('[', iCurParseIndex) != -1)
{
if (m_strJsonDSSchema.IndexOf('[', iCurParseIndex) < m_strJsonDSSchema.IndexOf('{', iCurParseIndex))
{
iCurParseIndex = m_strJsonDSSchema.IndexOf('[', iCurParseIndex) + 1;
}
}//end if
bool blColDetected = true;
while (blColDetected)
{
JsonColumnSchema schemaJsonCol = null;
blColDetected = ParseJsonColumnSchema(ref schemaJsonCol, ref iCurParseIndex);
schemaJsonTable.Columns.Add(schemaJsonCol);
}//end while
blTableSchemaFound = MoveNextSchemaRecord(ref iCurParseIndex);
return(blTableSchemaFound);
}
catch (Exception err)
{
ErrorHandler.ShowErrorMessage(err, "Error in ParseJsonTableSchema Overload 1 function of JsonDataSetSchemaParser class.");
return(false);
}
}
/// <summary>
/// Parses the buffered stream of data contained in the JsonDataSetSchemaParser class, which was loaded from a Tiferix JsonDataSetSchema
/// file. The function will read the schema data from the buffered schema string into the linked JsonDataSetSchema object of the parser class,
/// which then can be used to initialize the schema of the DataSet object.
/// </summary>
public virtual JsonDataSetSchema ParseJsonSchema()
{
try
{
JsonDataSetSchema schemaJsonDS = new JsonDataSetSchema();
string strExtractData = "";
int iCurParseIndex = 0;
int iEndParseIndex = 0;
iCurParseIndex = m_strJsonDSSchema.IndexOf("\"DataSet\"", iCurParseIndex, StringComparison.OrdinalIgnoreCase);
iCurParseIndex = m_strJsonDSSchema.IndexOf(':', iCurParseIndex);
iCurParseIndex = m_strJsonDSSchema.IndexOf('\"', iCurParseIndex) + 1;
iEndParseIndex = m_strJsonDSSchema.IndexOf('\"', iCurParseIndex);
//Extracts the name of the DataSet.
strExtractData = m_strJsonDSSchema.Substring(iCurParseIndex, iEndParseIndex - iCurParseIndex);
schemaJsonDS.DataSetName = strExtractData;
iCurParseIndex = iEndParseIndex + 1;
iCurParseIndex = m_strJsonDSSchema.IndexOf("\"Tables\"", iCurParseIndex, StringComparison.OrdinalIgnoreCase);
iCurParseIndex = m_strJsonDSSchema.IndexOf(':', iCurParseIndex) + 1;
if (m_strJsonDSSchema.IndexOf('[', iCurParseIndex) != -1)
{
if (m_strJsonDSSchema.IndexOf('[', iCurParseIndex) < m_strJsonDSSchema.IndexOf('{', iCurParseIndex))
{
iCurParseIndex = m_strJsonDSSchema.IndexOf('[', iCurParseIndex) + 1;
}
}//end if
bool blTableDetected = true;
while (blTableDetected)
{
JsonTableSchema schemaJsonTable = null;
blTableDetected = ParseJsonTableSchema(ref schemaJsonTable, ref iCurParseIndex);
schemaJsonDS.Tables.Add(schemaJsonTable);
}//end while
return(schemaJsonDS);
}
catch (Exception err)
{
ErrorHandler.ShowErrorMessage(err, "Error in ParseJsonSchema Overload 1 function of JsonDataSetSchemaParser class.");
return(null);
}
}
/// <summary>
/// Parses the current JsonTableSchema information contained in the JsonDataSetSchema data stream linked to the JsonDataSetSchemaParser
/// class. The function will read the table schema data at the current position of the data stream into a newly instantiated JsonTableSchema object
/// which will then be returned by the function. This data can then be used to initialize the schema of a DataTable object.
/// </summary>
/// <returns></returns>
public virtual JsonTableSchema ParseJsonTableSchema()
{
try
{
JsonTableSchema schemaJsonTable = null;
int iCurParseIndex = 0;
ParseJsonTableSchema(ref schemaJsonTable, ref iCurParseIndex);
return(schemaJsonTable);
}
catch (Exception err)
{
ErrorHandler.ShowErrorMessage(err, "Error in ParseJsonTableSchema Overload 2 function of JsonDataSetSchemaParser class.");
return(null);
}
}
