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• OptionalOperator.java

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org.unlaxer.tinyexpression.OptionalOperator Maven / Gradle / Ivy

package org.unlaxer.tinyexpression;

import java.util.Optional;

import org.unlaxer.Token;

public interface OptionalOperator extends TokenBaseOperator{
	
	public Optional evaluateOptional(C context , Token token);
	
	@Override
	default T evaluate(C context, Token token) {
		return evaluateOptional(context , token)
			.orElseGet(()->defaultValue(context, token));
	}
	
	public T defaultValue(C context, Token token);
}