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/*

    This file is part of the iText (R) project.
    Copyright (c) 1998-2019 iText Group NV
    Authors: Bruno Lowagie, Paulo Soares, et al.

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU Affero General Public License version 3
    as published by the Free Software Foundation with the addition of the
    following permission added to Section 15 as permitted in Section 7(a):
    FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
    ITEXT GROUP. ITEXT GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
    OF THIRD PARTY RIGHTS

    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 Affero General Public License for more details.
    You should have received a copy of the GNU Affero General Public License
    along with this program; if not, see http://www.gnu.org/licenses or write to
    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
    Boston, MA, 02110-1301 USA, or download the license from the following URL:
    http://itextpdf.com/terms-of-use/

    The interactive user interfaces in modified source and object code versions
    of this program must display Appropriate Legal Notices, as required under
    Section 5 of the GNU Affero General Public License.

    In accordance with Section 7(b) of the GNU Affero General Public License,
    a covered work must retain the producer line in every PDF that is created
    or manipulated using iText.

    You can be released from the requirements of the license by purchasing
    a commercial license. Buying such a license is mandatory as soon as you
    develop commercial activities involving the iText software without
    disclosing the source code of your own applications.
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    For more information, please contact iText Software Corp. at this
    address: [email protected]
 */
package com.itextpdf.kernel.counter.data;

/**
 * The data that class that contains event signature (in simple cases it can be just event type)
 * and count.
 * Is used in {@link EventDataHandler} for adding some additional information to the event before processing
 * and merging same events by increasing count.
 *
 * @param  the signature type
 */
public class EventData {

    private final T signature;
    private long count;

    public EventData(T signature) {
        this(signature, 1);
    }

    public EventData(T signature, long count) {
        this.signature = signature;
        this.count = count;
    }

    /**
     * The signature that identifies this data.
     *
     * @return data signature
     */
    public final T getSignature() {
        return signature;
    }

    /**
     * Number of data instances with the same signature that where merged.
     *
     * @return data count
     */
    public final long getCount() {
        return count;
    }

    protected void mergeWith(EventData data) {
        this.count += data.getCount();
    }
}