com.scudata.expression.mfn.sequence.Ifn Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of esproc Show documentation

SPL(Structured Process Language) A programming language specially for structured data computing.

There is a newer version: 20240823

package com.scudata.expression.mfn.sequence;

import com.scudata.common.MessageManager;
import com.scudata.common.RQException;
import com.scudata.dm.Context;
import com.scudata.expression.Expression;
import com.scudata.expression.SequenceFunction;
import com.scudata.resources.EngineMessage;

/**
 * ???????е?һ????Ϊ?յ?Ԫ??
 * A.ifn(), A.ifn(x)
 * @author RunQian
 *
 */
public class Ifn extends SequenceFunction {
	public Object calculate(Context ctx) {
		if (param == null) {
			return srcSequence.ifn();
		} else if (param.isLeaf()) {
			Expression exp = param.getLeafExpression();
			return srcSequence.ifn(exp, ctx);
		} else {
			MessageManager mm = EngineMessage.get();
			throw new RQException("ifn" + mm.getMessage("function.invalidParam"));
		}
	}
}