com.github.dakusui.lisj.func.math.Sub Maven / Gradle / Ivy

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package com.github.dakusui.lisj.func.math;

import java.math.BigDecimal;

import com.github.dakusui.lisj.Context;

import static com.github.dakusui.lisj.Basic.*;

public class Sub extends NumericFunc {
	/**
	 * Serial version UID.
	 */
	private static final long serialVersionUID = 30455154598602132L;

	@Override
	protected BigDecimal bigDecimalsEvaluateLast(Context context, BigDecimal[] evaluatedParams) {
		BigDecimal ret = null;
		for (BigDecimal cur : evaluatedParams) {
			if (ret == null) ret = cur;
			else ret = ret.subtract(cur);
		}
		return ret;
	}

	@Override
	protected Object checkParams(Object params) {
		super.checkParams(params);
		if (length(params) < 1) throw new IllegalArgumentException(tooFewArguments(params));
		return params;
	}

	private String tooFewArguments(Object params) {
		return String.format("Too few arguments(%s) are given.", tostr(params));
	}
}