Java tutorial
/* =========================================================== * JFreeChart : a free chart library for the Java(tm) platform * =========================================================== * * (C) Copyright 2000-2008, by Object Refinery Limited and Contributors. * * Project Info: http://www.jfree.org/jfreechart/index.html * * 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 Lesser General Public * License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, * USA. * * [Java is a trademark or registered trademark of Sun Microsystems, Inc. * in the United States and other countries.] * * ------------------- * NumberTickUnit.java * ------------------- * (C) Copyright 2001-2008, by Object Refinery Limited. * * Original Author: David Gilbert (for Object Refinery Limited); * Contributor(s): -; * * Changes * ------- * 19-Dec-2001 : Added standard header (DG); * 01-May-2002 : Updated for changed to TickUnit class (DG); * 01-Oct-2002 : Fixed errors reported by Checkstyle (DG); * 08-Nov-2002 : Moved to new package com.jrefinery.chart.axis (DG); * 09-Jan-2002 : Added a new constructor (DG); * 26-Mar-2003 : Implemented Serializable (DG); * 05-Jul-2005 : Added equals() implementation (DG); * 05-Sep-2005 : Implemented hashCode(), thanks to Thomas Morgner (DG); * 02-Aug-2007 : Added new constructor with minorTickCount (DG); * */ package org.pentaho.plugin.jfreereport.reportcharts.backport; import org.jfree.chart.axis.NumberTickUnit; import org.pentaho.reporting.libraries.formatting.FastDecimalFormat; import java.io.Serializable; import java.math.BigDecimal; import java.text.NumberFormat; import java.util.Locale; /** * A numerical tick unit. */ public class FastNumberTickUnit extends NumberTickUnit implements Serializable { /** * For serialization. */ private static final long serialVersionUID = 3849459506627654442L; /** * A formatter for the tick unit. */ private FastDecimalFormat formatter; /** * Creates a new number tick unit. * * @param size the size of the tick unit. */ public FastNumberTickUnit(final double size) { this(size, new FastDecimalFormat(FastDecimalFormat.TYPE_DEFAULT, Locale.getDefault())); } /** * Creates a new number tick unit. * * @param size the size of the tick unit. * @param formatter a number formatter for the tick unit (<code>null</code> not permitted). */ public FastNumberTickUnit(final double size, final FastDecimalFormat formatter) { super(size); if (formatter == null) { throw new IllegalArgumentException("Null 'formatter' argument."); } this.formatter = formatter; } /** * Creates a new number tick unit. * * @param size the size of the tick unit. * @param formatter a number formatter for the tick unit (<code>null</code> not permitted). * @param minorTickCount the number of minor ticks. * @since 1.0.7 */ public FastNumberTickUnit(final double size, final FastDecimalFormat formatter, final int minorTickCount) { super(size, NumberFormat.getInstance(), minorTickCount); if (formatter == null) { throw new IllegalArgumentException("Null 'formatter' argument."); } this.formatter = formatter; } /** * Converts a value to a string. * * @param value the value. * @return The formatted string. */ public String valueToString(final double value) { return this.formatter.format(new BigDecimal(value)); } /** * Tests this formatter for equality with an arbitrary object. * * @param obj the object (<code>null</code> permitted). * @return A boolean. */ public boolean equals(final Object obj) { if (obj == this) { return true; } if (!(obj instanceof FastNumberTickUnit)) { return false; } if (!super.equals(obj)) { return false; } final FastNumberTickUnit that = (FastNumberTickUnit) obj; if (!this.formatter.equals(that.formatter)) { return false; } return true; } /** * Returns a string representing this unit. * * @return A string. */ public String toString() { return "[size=" + this.valueToString(this.getSize()) + "]"; } /** * Returns a hash code for this instance. * * @return A hash code. */ public int hashCode() { int result = super.hashCode(); result = 29 * result + (this.formatter != null ? this.formatter.hashCode() : 0); return result; } }