Test coverage report for MetricProcedureNesting.java - www.sdmetrics.com

/*
 * SDMetrics Open Core for UML design measurement
 * Copyright (c) Juergen Wuest
 * To contact the author, see <http://www.sdmetrics.com/Contact.html>.
 * 
 * This file is part of the SDMetrics Open Core.
 * 
 * SDMetrics Open Core is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
    
 * SDMetrics Open Core 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with SDMetrics Open Core.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
package com.sdmetrics.metrics;

import com.sdmetrics.math.ExpressionNode;
import com.sdmetrics.model.ModelElement;

/**
 * Calculates a "nesting" metric procedure.
 */
public class MetricProcedureNesting extends MetricProcedure {

    /**
     * {@inheritDoc}
     * @return Nesting level as defined by the metric.
     */
    @Override
    public Integer calculate(ModelElement element, Metric metric)
            throws SDMetricsException {
        ProcedureAttributes attributes = metric.getAttributes();
        ExpressionNode rel = attributes.getRequiredExpression("relation");
        int result = 0;

        // Get parent in the relation that defines the nesting
        ModelElement parent = getMetricsEngine().evalModelElementExpression(
                element, rel, new Variables(element));
        if (parent != null) {
            if (isCompatible(element, metric, parent)) {
                // Compatible parent, nesting is parent's nesting level plus 1
                result = 1 + ((Integer) getMetricsEngine().getMetricValue(
                        parent, metric)).intValue();
            }
        }
        return Integer.valueOf(result);
    }
}