/**
* Create an execution object for the specified command
*
* @param command the command
* @param executionContext Provides information about the context that this command is executing
* within, such as the identifiers for the command being executed
* @param metadata Access to runtime metadata if needed to translate the command
* @param connection connection factory object to the data source
* @return An execution object that can use to execute the command
*/
public Execution createExecution(
Command command, ExecutionContext executionContext, RuntimeMetadata metadata, C connection)
throws TranslatorException {
if (command instanceof Call) {
Call obj = (Call) command;
// TODO: our extension property support in designer makes ad-hoc properties impossible, so
// we just match based upon name. it would be better to have the metadatarepository/tooling
// add a teiid property
// to explicitly set this proc as direct.
// the other approach would be to addd a native system stored procedure, but that would
// require
// special security semantics, whereas this proc can be secured on a schema basis
if (supportsNativeQueries()
&& obj.getMetadataObject().getName().equals(getNativeQueryProcedureName())) {
List<Argument> arguments = obj.getArguments();
return createDirectExecution(arguments, command, executionContext, metadata, connection);
}
}
if (command instanceof QueryExpression) {
return createResultSetExecution(
(QueryExpression) command, executionContext, metadata, connection);
}
if (command instanceof Call) {
return createProcedureExecution((Call) command, executionContext, metadata, connection);
}
return createUpdateExecution(command, executionContext, metadata, connection);
}
@Override
public List<?> getOutputParameterValues() throws TranslatorException {
Call proc = (Call) this.command;
int count = proc.getReturnType() != null ? 1 : 0;
for (Argument param : proc.getArguments()) {
if (param.getDirection() == Direction.INOUT || param.getDirection() == Direction.OUT) {
count++;
}
}
return Arrays.asList(new Object[count]);
}