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package cdm.base.math.functions;

import java.math.BigDecimal;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

public class VectorGrowthOperationImpl extends VectorGrowthOperation {

	// create a list of values based on a supplied list of growth factors. Each returned value will be the prior value
	// times the corresponding growth factor
	@Override
	protected List doEvaluate(BigDecimal baseValue, List factors) {
		if (baseValue == null || factors == null)
			return Collections.emptyList();
		return doEval(baseValue, factors);
	}

	private List doEval(BigDecimal baseValue, List factor) {
		List result = new ArrayList<>(factor.size() + 1);
		BigDecimal value = baseValue;
		// initialize the list with the base value
		result.add(baseValue);
		// do the multiplications
		for (BigDecimal fact : factor) {
			value = value.multiply(fact);
			result.add(value);
		}
		return result;
	}
}