/*
* Move the input table to the top of the selection list.
*/
public static void setPriority(java.util.Vector <Object> inputList, String inputTable)
{
String tableName;
int i;
if (inputList == null)
{
return;
}
for (i = 0; i < inputList.size(); i++)
{
tableName = (String)inputList.elementAt(i);
if (tableName.equals(inputTable))
{
if (i > 0)
{
inputList.removeElementAt(i);
inputList.insertElementAt(tableName, 0);
}
break;
}
}
}
/*
* Validate the column specifications by checking against the tables.
*/
public void validateColumns() //throws TinySQLException
{
String columnName, columnAlias, columnContext;
TsColumn columnObject;
bool selectStar;
TinySQLTable jtbl;
int i, j;
/*
* Check for a column named *
*/
selectStar = false;
for (i = 0; i < columnList.size(); i++)
{
columnName = (String)columnList.elementAt(i);
columnContext = (String)contextList.elementAt(i);
if (columnName.equals("*"))
{
if (!columnContext.equals("SELECT"))
{
throw new TinySQLException("* must be a SELECT column.");
}
selectStar = true;
break;
}
}
if (selectStar)
{
/*
* A column * has been found. Delete the existing list of SELECT
* columns and replace by using an enumeration variable to cycle through
* the columns in the tables Hashtable.
*/
for (i = 0; i < columnList.size(); i++)
{
columnContext = (String)contextList.elementAt(i);
if (columnContext.equals("SELECT"))
{
columnList.removeElementAt(i);
contextList.removeElementAt(i);
columnAliasList.removeElementAt(i);
}
}
for (i = 0; i < tableList.size(); i++)
{
jtbl = (TinySQLTable)tables.get((String)tableList.elementAt(i));
/*
* Expand to all columns.
*/
for (j = 0; j < jtbl.columnNameKeys.size(); j++)
{
columnName = (String)jtbl.columnNameKeys.elementAt(j);
columnList.addElement(jtbl.table + "->" + jtbl.tableAlias
+ "." + columnName);
columnAliasList.addElement(columnName);
contextList.addElement("SELECT");
}
}
}
/*
* Build a column object for each selected column.
*/
if (tables == (java.util.Hashtable <Object, Object>)null)
{
java.lang.SystemJ.outJ.println("*****Column validation - no tables defined.");
}
for (i = 0; i < columnList.size(); i++)
{
columnName = (String)columnList.elementAt(i);
columnContext = (String)contextList.elementAt(i);
columnAlias = (String)null;
if (i < columnAliasList.size())
{
columnAlias = (String)columnAliasList.elementAt(i);
}
columnObject = new TsColumn(columnName, tables, columnContext);
columnObject.alias = UtilString.removeQuotes(columnAlias);
columns.addElement(columnObject);
}
}
