} // getSchemaByNameInternal()
private Schema getInformationSchema()
{
// Create schema
MutableSchema informationSchema = new MutableSchema(INFORMATION_SCHEMA_NAME);
MutableTable tablesTable = new MutableTable("tables", TableType.TABLE, informationSchema);
MutableTable columnsTable = new MutableTable("columns", TableType.TABLE, informationSchema);
MutableTable relationshipsTable = new MutableTable("relationships", TableType.TABLE, informationSchema);
informationSchema.addTable(tablesTable).addTable(columnsTable).addTable(relationshipsTable);
// Create "tables" table: name, type, num_columns, remarks
tablesTable.addColumn(new MutableColumn("name", ColumnTypeConstants.VARCHAR, tablesTable, 0, false));
tablesTable.addColumn(new MutableColumn("type", ColumnTypeConstants.VARCHAR, tablesTable, 1, true));
tablesTable.addColumn(new MutableColumn("num_columns", ColumnTypeConstants.INTEGER, tablesTable, 2, true));
tablesTable.addColumn(new MutableColumn("remarks", ColumnTypeConstants.VARCHAR, tablesTable, 3, true));
// Create "columns" table: name, type, native_type, size, nullable,
// indexed, table, remarks
columnsTable.addColumn(new MutableColumn("name", ColumnTypeConstants.VARCHAR, columnsTable, 0, false));
columnsTable.addColumn(new MutableColumn("type", ColumnTypeConstants.VARCHAR, columnsTable, 1, true));
columnsTable.addColumn(new MutableColumn("native_type", ColumnTypeConstants.VARCHAR, columnsTable, 2, true));
columnsTable.addColumn(new MutableColumn("size", ColumnTypeConstants.INTEGER, columnsTable, 3, true));
columnsTable.addColumn(new MutableColumn("nullable", ColumnTypeConstants.BOOLEAN, columnsTable, 4, true));
columnsTable.addColumn(new MutableColumn("indexed", ColumnTypeConstants.BOOLEAN, columnsTable, 5, true));
columnsTable.addColumn(new MutableColumn("table", ColumnTypeConstants.VARCHAR, columnsTable, 6, false));
columnsTable.addColumn(new MutableColumn("remarks", ColumnTypeConstants.VARCHAR, columnsTable, 7, true));
// Create "relationships" table: primary_table, primary_column,
// foreign_table, foreign_column
relationshipsTable
.addColumn(new MutableColumn("primary_table", ColumnTypeConstants.VARCHAR, relationshipsTable, 0, false));
relationshipsTable
.addColumn(new MutableColumn("primary_column", ColumnTypeConstants.VARCHAR, relationshipsTable, 1, false));
relationshipsTable
.addColumn(new MutableColumn("foreign_table", ColumnTypeConstants.VARCHAR, relationshipsTable, 2, false));
relationshipsTable
.addColumn(new MutableColumn("foreign_column", ColumnTypeConstants.VARCHAR, relationshipsTable, 3, false));
MutableRelationship.createRelationship(tablesTable.getColumnByName("name"),
columnsTable.getColumnByName("table"));
MutableRelationship.createRelationship(tablesTable.getColumnByName("name"),
relationshipsTable.getColumnByName("primary_table"));
MutableRelationship.createRelationship(tablesTable.getColumnByName("name"),
relationshipsTable.getColumnByName("foreign_table"));
MutableRelationship.createRelationship(columnsTable.getColumnByName("name"),
relationshipsTable.getColumnByName("primary_column"));
MutableRelationship.createRelationship(columnsTable.getColumnByName("name"),
relationshipsTable.getColumnByName("foreign_column"));
return(informationSchema);
} // getInformationSchema()
// @Override
public MutableTable buildTable()
{
int tableObservations = getObservationCount();
// sort column names by copying them to a TreeSet
HashSet <String> columnNames = new HashSet <String>(_columnBuilders.Keys); // new TreeSet<String>(_columnBuilders.keySet());
MutableTable table = new MutableTable(_tableName);
int columnNumber = 0;
foreach (String columnName in columnNames)
{
InferentialColumnBuilder columnBuilder = (InferentialColumnBuilder)getColumnBuilder(columnName);
MutableColumn column = columnBuilder.build();
column.setTable(table);
column.setColumnNumber(columnNumber);
int columnObservations = columnBuilder.getObservationCount();
if (tableObservations > columnObservations)
{
// there may be nulls - some records does not even contain the
// column
column.setNullable(true);
}
table.addColumn(column);
columnNumber++;
}
return(table);
}
// @Override
public MutableSchema build()
{
MutableSchema schema = new MutableSchema(_schemaName);
MutableTable table = new MutableTable(_tableName, schema);
table.addColumn(new MutableColumn(_columnName, ColumnTypeConstants.MAP, table, 1, null, null, false, null, false, null));
schema.addTable(table);
return(schema);
}
} // toString()()
/**
* Creates a {@link MutableTable} based on this {@link SimpleTableDef}. Note
* that the created table will not have any schema set.
*
* @return a table representation of this table definition.
*/
public MutableTable toTable()
{
String name = getName();
String[] columnNames = getColumnNames();
ColumnType[] columnTypes = getColumnTypes();
MutableTable table = new MutableTable(name, TableType.TABLE);
for (int i = 0; i < columnNames.Length; i++)
{
table.addColumn(new MutableColumn(columnNames[i], columnTypes[i], table, i, true));
}
return table;
} // toTable()