/**
* Creates a JdbcSchema, taking credentials from a map.
*
* @param parentSchema Parent schema
* @param name Name
* @param operand Map of property/value pairs
* @return A JdbcSchema
*/
public static JdbcSchema create(
SchemaPlus parentSchema, String name, Map<String, Object> operand) {
DataSource dataSource;
try {
final String dataSourceName = (String) operand.get("dataSource");
if (dataSourceName != null) {
final Class<?> clazz = Class.forName((String) dataSourceName);
dataSource = (DataSource) clazz.newInstance();
} else {
final String jdbcUrl = (String) operand.get("jdbcUrl");
final String jdbcDriver = (String) operand.get("jdbcDriver");
final String jdbcUser = (String) operand.get("jdbcUser");
final String jdbcPassword = (String) operand.get("jdbcPassword");
dataSource = dataSource(jdbcUrl, jdbcDriver, jdbcUser, jdbcPassword);
}
} catch (Exception e) {
throw new RuntimeException("Error while reading dataSource", e);
}
String jdbcCatalog = (String) operand.get("jdbcCatalog");
String jdbcSchema = (String) operand.get("jdbcSchema");
return JdbcSchema.create(parentSchema, name, dataSource, jdbcCatalog, jdbcSchema);
}
public <T> T unwrap(Class<T> clazz) {
if (clazz.isInstance(this)) {
return clazz.cast(this);
}
if (clazz.isInstance(OptiqSchema.this)) {
return clazz.cast(OptiqSchema.this);
}
if (clazz.isInstance(OptiqSchema.this.schema)) {
return clazz.cast(OptiqSchema.this.schema);
}
throw new ClassCastException("not a " + clazz);
}