/*******************************************************************************
 * Copyright (c) 2000, 2005 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/

package org.eclipse.test.internal.performance.eval;

import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;

import org.eclipse.core.runtime.Assert;
import org.eclipse.test.internal.performance.data.Dim;

/**
 * @since 3.1
 */
public abstract class AssertChecker {

    private Set<Dim> fDimensions;

    public AssertChecker(Dim dimension) {
        this(new Dim[] { dimension });
    }

    public AssertChecker(Dim[] dimensions) {
        fDimensions = new HashSet<>();
        fDimensions.addAll(Arrays.asList(dimensions));
    }

    public Dim[] getDimensions() {
        return fDimensions.toArray(new Dim[fDimensions.size()]);
    }

    protected Dim getDimension() {
        Assert.isTrue(fDimensions.size() == 1);
        return getDimensions()[0];
    }

    /**
     * Evaluates the predicate.
     *
     * @param reference
     *            statistics of dimensions of the reference metering session
     * @param measured
     *            statistics of dimensions of the metering session to be tested
     * @param message
     *            a message presented to the user upon failure
     * @return <code>true</code> if the predicate passes, <code>false</code> if it fails
     */
    public abstract boolean test(StatisticsSession reference, StatisticsSession measured, StringBuffer message);
}