}
@Override
public EvaluationResult evaluate(ProcessDataRecord record) {
if (ops.isEmpty()) {
return new EvaluationResult(null).withWarning(ErrorCode.W111);
} else if (ops.size() == 2) {
EvaluationResult val = ops.get(0).evaluate(record);
EvaluationResult start = ops.get(1).evaluate(record);
if (val.getPayload() instanceof String && start.getPayload() instanceof Number) {
String str = (String) val.getPayload();
int startI = ((Number)start.getPayload()).intValue();
return new EvaluationResult(str.substring(startI), val, start);
} else {
return val.withWarning(ErrorCode.W110);
}
} else if (ops.size() == 3) {
EvaluationResult val = ops.get(0).evaluate(record);
EvaluationResult start = ops.get(1).evaluate(record);
EvaluationResult length = ops.get(2).evaluate(record);
if (val.getPayload() instanceof String &&
start.getPayload() instanceof Number &&
length.getPayload() instanceof Number) {
String str = (String) val.getPayload();
int startI = ((Number)start.getPayload()).intValue();
int lengthI = ((Number)length.getPayload()).intValue();
return new EvaluationResult(str.substring(startI, startI + lengthI), val, start, length);
} else {
return val.withWarning(ErrorCode.W110);
}
} else {
return ops.get(0).evaluate(record).withWarning(ErrorCode.W111);