public override bool isCompatibleDef(SQLTypeDef def)
{
if (this.getTypeID() != def.getTypeID())
{
return(false);
}
int thisPrecision = this.getParam("precision");
int thisScale = this.getParam("scale");
int defPrecision = def.getParam("precision");
int defScale = def.getParam("scale");
thisPrecision -= thisScale;
defPrecision -= defScale;
if (thisPrecision < defPrecision)
{
return(false);
}
if (thisScale < defScale)
{
return(false);
}
return(true);
}
/* Returns a new SQLTypeDef instance recommended for the array of cell
* data passed. */
public static SQLTypeDef getColumnTypeDef(string[] cellData)
{
int numCells = cellData.Length;
SQLTypeDef[] cellTypes = new SQLTypeDef[numCells];
SQLTypeDef columnType = getNew((SQLTypeDef.SQLTypeID) 0);
for (int i = 0; i < numCells; ++i)
{
cellTypes[i] = getNew(cellData[i]);
if (cellTypes[i] != null)
{
int columnTypeID = (int)columnType.getTypeID();
int cellTypeID = (int)cellTypes[i].getTypeID();
if (columnTypeID < cellTypeID)
{
columnType = getCopy(cellTypes[i]);
}
else if (columnTypeID == cellTypeID)
{
columnType.setCompatibleParams(cellTypes[i]);
}
}
}
return(columnType);
}
// Run when the edit current attribute button is pressed
private void btnEditAttribute_Click(object sender, EventArgs e)
{
grpSQLOutput.Enabled = false;
cboxCurrentAttribute.Enabled = false;
btnEditAttribute.Enabled = false;
grpAttributeOptions.Enabled = true;
int columnIndex = cboxCurrentAttribute.SelectedIndex;
txtAttributeName.Text = columns[columnIndex].getName();
cboxAttributeType.Items.Clear();
foreach (SQLTypeDef.SQLTypeID typeID in (SQLTypeDef.SQLTypeID[])Enum.GetValues(typeof(SQLTypeDef.SQLTypeID)))
{
cboxAttributeType.Items.Add(SQLTypeDef.getSQLTypeName(typeID));
}
cboxAttributeType.SelectedIndex = (int)columns[columnIndex].getTypeID();
if (columns[columnIndex].getTypeDef().getParams().Length == 0)
{
btnAdvancedAttribute.Enabled = false;
}
else
{
btnAdvancedAttribute.Enabled = true;
}
currentEditDef = columns[columnIndex].getTypeDef();
}
// Constructor
public Column(string name, string[] data, SQLTypeDef typeDef)
{
this.name = name;
this.data = new string[data.Length];
Array.Copy(data, this.data, data.Length);
this.typeDef = getCopy(typeDef);
this.setFlags();
}
public override bool isCompatibleDef(SQLTypeDef def)
{
if (this.getTypeID() == def.getTypeID())
{
return(true);
}
else
{
return(false);
}
}
public override bool setCompatibleParams(SQLTypeDef def)
{
if (this.getTypeID() != def.getTypeID())
{
return(false);
}
if (def.getParam("length") > this.getParam("length"))
{
this.setParam("length", def.getParam("length"));
}
return(true);
}
// Run when the attribute type is changed
private void cboxAttributeType_SelectedIndexChanged(object sender, EventArgs e)
{
int columnIndex = cboxCurrentAttribute.SelectedIndex;
currentEditDef = SQLTypeDefFactory.getNew((SQLTypeDef.SQLTypeID)cboxAttributeType.SelectedIndex);
if (currentEditDef.getParams().Length == 0)
{
btnAdvancedAttribute.Enabled = false;
}
else
{
btnAdvancedAttribute.Enabled = true;
}
}
// Run when the advanced button is pressed
private void btnAdvancedAttribute_Click(object sender, EventArgs e)
{
int columnIndex = cboxCurrentAttribute.SelectedIndex;
SQLTypeDef def = SQLTypeDefFactory.getCopy(currentEditDef);
AdvancedAttributeForm popupForm = new AdvancedAttributeForm(def);
if (popupForm.ShowDialog(this) == DialogResult.OK)
{
currentEditDef = def;
MessageBox.Show("Successfully saved attribute parameter changes!", "Success");
}
else
{
MessageBox.Show("Attribute parameter changes have been cancelled!", "Cancelled");
}
}
public static void run()
{
string[] decStrs = new string[3];
decStrs[0] = "31.234"; decStrs[1] = "315.267"; decStrs[2] = "1234.5678";
SQLTypeDef[] decs = new SQLTypeDef[3];
for (int i = 0; i < decs.Length; i++)
{
decs[i] = getSQLDecimal(decStrs[i]);
if (decs[i] == null)
{
Console.WriteLine("null at " + i.ToString());
}
else
{
Console.WriteLine(decs[i].getSQLDefString() + " at " + i.ToString());
}
}
}
/* Returns a SQLTypeDef fitting for the passed cell data example. */
public static SQLTypeDef getNew(string dataStr)
{
SQLTypeDef def = getSQLBoolean(dataStr);
if (def != null)
{
return(def);
}
def = getSQLInteger(dataStr);
if (def != null)
{
return(def);
}
def = getSQLDecimal(dataStr);
if (def != null)
{
return(def);
}
def = getSQLVarchar(dataStr);
return(def);
}
/* Returns a copy of the passed SQLTypeDef subclass/implementation instance. */
public static SQLTypeDef getCopy(SQLTypeDef obj)
{
SQLTypeID typeID = obj.getTypeID();
switch (typeID)
{
case SQLTypeID.BOOLEAN:
return(new SQLBoolean());
case SQLTypeID.INTEGER:
return(new SQLInteger());
case SQLTypeID.DECIMAL:
return(new SQLDecimal((SQLDecimal)obj));
case SQLTypeID.VARCHAR:
return(new SQLVarchar((SQLVarchar)obj));
default:
return(null);
}
}
/* Returns a list of columns by taking the passed 2D cell data
* string array and separating the column names and data. */
public static List <Column> getColumnsFromCells(string[,] cellData)
{
int numRows = cellData.GetLength(0);
int numColumns = cellData.GetLength(1);
List <Column> columns = new List <Column>(numColumns);
for (int i = 0; i < numColumns; ++i)
{
string colName = cellData[0, i];
string[] tmpCells = new string[numRows - 1];
for (int j = 1; j < numRows; ++j)
{
tmpCells[j - 1] = cellData[j, i];
}
SQLTypeDef tempDef = getColumnTypeDef(tmpCells);
columns.Add(new Column(colName, tmpCells, tempDef));
}
return(columns);
}
public override bool setCompatibleParams(SQLTypeDef def)
{
if (this.getTypeID() != def.getTypeID())
{
return(false);
}
int thisPrecision = this.getParam("precision");
int thisScale = this.getParam("scale");
int defPrecision = def.getParam("precision");
int defScale = def.getParam("scale");
thisPrecision -= thisScale;
defPrecision -= defScale;
int maxPrecision = (thisPrecision > defPrecision) ? thisPrecision : defPrecision;
int maxScale = (thisScale > defScale) ? thisScale : defScale;
this.setParam("precision", maxPrecision + maxScale);
this.setParam("scale", maxScale);
return(true);
}
/* Changes the parameters of the caller to the most lenient value out of * the caller's and the passed object's parameters if this is possible * (i.e. they still must be the same type). If they are incompatible types, * returns false. */ public abstract bool setCompatibleParams(SQLTypeDef def);
/* Returns true if the given SQLTypeDef child instance is of the same * type as the caller and it can be defined given the caller's * parameters. That is, the caller's parameters must be at least as * lenient as the passed object's parameters. Otherwise, returns false. */ public abstract bool isCompatibleDef(SQLTypeDef def);
public override bool setCompatibleParams(SQLTypeDef def)
{
return(this.isCompatibleDef(def));
}
/* Sets the SQLTypeDef of the column to the passed one. */
public void setTypeDef(SQLTypeDef def)
{
this.typeDef = getCopy(def);
}
private SQLTypeDef tdCng; // Temporary copy of edited SQLTypeDef to validate changes
// Constructor
public AdvancedAttributeForm(SQLTypeDef typeDef)
{
InitializeComponent();
tdRef = typeDef;
tdCng = SQLTypeDefFactory.getCopy(typeDef);
}
