package org.yaac.server.egql.evaluator.function;
import org.yaac.server.egql.evaluator.EvaluationResult;
import org.yaac.server.egql.exception.EGQLException;
import org.yaac.server.egql.processor.ProcessData.ProcessDataRecord;
import org.yaac.shared.ErrorCode;
/**
* @author Max Zhu (thebbsky@gmail.com)
*
*/
public class UCaseFunction extends Function {
/**
*
*/
private static final long serialVersionUID = 1L;
@Override
public void validate() throws EGQLException {
FunctionUtil.ensureParamSize(ops, 1);
}
@Override
public EvaluationResult evaluate(ProcessDataRecord record) {
if (this.ops.isEmpty()) {
return new EvaluationResult(null).withWarning(ErrorCode.W101);
} else if (this.ops.size() == 1) {
EvaluationResult r = ops.get(0).evaluate(record);
if (r.getPayload() instanceof String) {
return new EvaluationResult(((String)r.getPayload()).toUpperCase(), r);
} else {
return r.withWarning(ErrorCode.W103);
}
} else {
return this.ops.get(0).evaluate(record).withWarning(ErrorCode.W101);
}
}
}