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package at.gv.egiz.eaaf.core.api.idp.process;

/**
 * Evaluates a given {@code expression} returning a boolean value.
 * 
 * @author tknall
 */
public interface ExpressionEvaluator {

	/**
	 * Evaluates a given {@code expression} returning a boolean value.
	 * 
	 * @param expressionContext
	 *            The context which can be used for evaluation of the expression.
	 * @param expression
	 *            The expression resulting in a boolean (must not be {@code null}).
	 * @return A boolean value.
	 * @throws IllegalArgumentException
	 *             In case of an invalid {@code expression}.
	 * @throws NullPointerException
	 *             In case of a {@code null} expression.
	 */
	boolean evaluate(ExpressionEvaluationContext expressionContext, String expression);

}