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/*
    SpecRunner - Acceptance Test Driven Development Tool
    Copyright (C) 2011-2016  Thiago Santos

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see 
 */
package org.specrunner.expressions;

import org.specrunner.context.IContext;

/**
 * An expression evaluation item.
 * 
 * @author Thiago Santos
 * 
 */
public interface IExpressionItem {

    /**
     * Defines a generic evaluation method.
     * 
     * @param factory
     *            A expression factory.
     * @param text
     *            The expression text.
     * @param context
     *            The test context.
     * @param silent
     *            The silent mode.
     * @return The resulting value.
     * @throws ExpressionException
     *             On expression errors.
     */
    Object eval(IExpressionFactory factory, String text, IContext context, boolean silent) throws ExpressionException;
}