org.spf4j.perf.impl.chart.TimestampTickUnitImpl.java Source code

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Here is the source code for org.spf4j.perf.impl.chart.TimestampTickUnitImpl.java

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/*
* Copyright (c) 2001, Zoltan Farkas All Rights Reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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 Lesser General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*/

package org.spf4j.perf.impl.chart;

import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
import org.jfree.chart.axis.NumberTickUnit;
import org.joda.time.format.DateTimeFormatter;

/**
 * This class although implements Serializable is not implemented correctly to serialize.
 * Since I do not intend to serialize this, I will skip the proper implementation.
 * @author zoly
 */
@SuppressFBWarnings({ "NFF_NON_FUNCTIONAL_FIELD", "SE_TRANSIENT_FIELD_NOT_RESTORED" })
class TimestampTickUnitImpl extends NumberTickUnit {
    private static final long serialVersionUID = 0L;
    private final long[] timestamps;
    private final long stepMillis;
    private final transient DateTimeFormatter formatter;

    public TimestampTickUnitImpl(final double size, final long[] timestamps, final long stepMillis,
            final DateTimeFormatter formatter) {
        super(size);
        this.timestamps = timestamps;
        this.formatter = formatter;
        this.stepMillis = stepMillis;
    }

    @Override
    public String valueToString(final double value) {
        int ival = (int) Math.round(value);
        long val;
        if (ival >= timestamps.length) {
            val = timestamps[timestamps.length - 1] + stepMillis * (ival - timestamps.length + 1);
        } else if (ival < 0) {
            val = timestamps[0] + ival * stepMillis;
        } else {
            val = timestamps[ival];
        }
        return formatter.print(val);
    }

    @Override
    public int hashCode() {
        int hash = 7;
        hash = 89 * hash + java.util.Arrays.hashCode(this.timestamps);
        hash = 89 * hash + (int) (this.stepMillis ^ (this.stepMillis >>> 32));
        return 89 * hash + (this.formatter != null ? this.formatter.hashCode() : 0);
    }

    @Override
    public boolean equals(final Object obj) {
        if (obj == null) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        final TimestampTickUnitImpl other = (TimestampTickUnitImpl) obj;
        if (!java.util.Arrays.equals(this.timestamps, other.timestamps)) {
            return false;
        }
        if (this.stepMillis != other.stepMillis) {
            return false;
        }
        return !(this.formatter != other.formatter
                && (this.formatter == null || !this.formatter.equals(other.formatter)));
    }

}