com.scudata.expression.operator.Not Maven / Gradle / Ivy

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

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package com.scudata.expression.operator;

import com.scudata.array.BoolArray;
import com.scudata.array.IArray;
import com.scudata.common.MessageManager;
import com.scudata.common.RQException;
import com.scudata.dm.Context;
import com.scudata.expression.Operator;
import com.scudata.resources.EngineMessage;
import com.scudata.util.Variant;

/**
 * ?????????!
 * @author RunQian
 *
 */
public class Not extends Operator {
	public Not() {
		priority = PRI_NOT;
	}

	/**
	 * ??????ʽ????Ч?ԣ???Ч???׳??쳣
	 */
	public void checkValidity() {
		if (right == null) {
			MessageManager mm = EngineMessage.get();
			throw new RQException("\"!\"" + mm.getMessage("operator.missingRightOperation"));
		}
		
		right.checkValidity();
	}
	
	public Object calculate(Context ctx) {
		return Boolean.valueOf(Variant.isFalse(right.calculate(ctx)));
	}
	
	/**
	 * ?ж??Ƿ???Լ???ȫ????ֵ???и?ֵ????ʱֻ??һ???м???
	 * @return
	 */
	public boolean canCalculateAll() {
		return right.canCalculateAll();
	}

	/**
	 * ??????????еĽ??
	 * @param ctx ??????????
	 * @return IArray
	 */
	public IArray calculateAll(Context ctx) {
		IArray rightArray = right.calculateAll(ctx);
		return rightArray.not();
	}
	
	/**
	 * ????signArray??ȡֵΪsign????
	 * @param ctx
	 * @param signArray ?б?ʶ????
	 * @param sign ??ʶ
	 * @return IArray
	 */
	public IArray calculateAll(Context ctx, IArray signArray, boolean sign) {
		IArray rightArray = right.calculateAll(ctx, signArray, sign);
		return rightArray.not();
	}
	
	/**
	 * ?????߼????????&&???Ҳ????ʽ
	 * @param ctx ??????????
	 * @param leftResult &&??????ʽ?ļ?????
	 * @return BoolArray
	 */
	public BoolArray calculateAnd(Context ctx, IArray leftResult) {
		BoolArray result = leftResult.isTrue();
		IArray rightArray = right.calculateAll(ctx, result, true);
		
		for (int i = 1, size = result.size(); i <= size; ++i) {
			if (result.isTrue(i) && rightArray.isTrue(i)) {
				result.set(i, false);
			}
		}
		
		return result;
	}
}