/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2011, 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.
*
* [Oracle and Java are registered trademarks of Oracle and/or its affiliates.
* Other names may be trademarks of their respective owners.]
*
* ------------------
* CompassFormat.java
* ------------------
* (C) Copyright 2003-2008, by Sylvain Vieujot and Contributors.
*
* Original Author: Sylvain Vieujot;
* Contributor(s): David Gilbert (for Object Refinery Limited);
*
* Changes
* -------
* 18-Feb-2004 : Version 1 contributed by Sylvain Vieujot (DG);
*
*/
package org.jfree.chart.axis;
import java.text.FieldPosition;
import java.text.NumberFormat;
import java.text.ParsePosition;
/**
* A formatter that displays numbers as directions.
*/
public class CompassFormat extends NumberFormat {
/** North. */
private static final String N = "N";
/** East. */
private static final String E = "E";
/** South. */
private static final String S = "S";
/** West. */
private static final String W = "W";
/** The directions. */
public static final String[] DIRECTIONS = {
N, N + N + E, N + E, E + N + E, E, E + S + E, S + E, S + S + E, S,
S + S + W, S + W, W + S + W, W, W + N + W, N + W, N + N + W, N
};
/**
* Creates a new formatter.
*/
public CompassFormat() {
super();
}
/**
* Returns a string representing the direction.
*
* @param direction the direction.
*
* @return A string.
*/
public String getDirectionCode(double direction) {
direction = direction % 360;
if (direction < 0.0) {
direction = direction + 360.0;
}
int index = ((int) Math.floor(direction / 11.25) + 1) / 2;
return DIRECTIONS[index];
}
/**
* Formats a number into the specified string buffer.
*
* @param number the number to format.
* @param toAppendTo the string buffer.
* @param pos the field position (ignored here).
*
* @return The string buffer.
*/
public StringBuffer format(double number, StringBuffer toAppendTo,
FieldPosition pos) {
return toAppendTo.append(getDirectionCode(number));
}
/**
* Formats a number into the specified string buffer.
*
* @param number the number to format.
* @param toAppendTo the string buffer.
* @param pos the field position (ignored here).
*
* @return The string buffer.
*/
public StringBuffer format(long number, StringBuffer toAppendTo,
FieldPosition pos) {
return toAppendTo.append(getDirectionCode(number));
}
/**
* This method returns <code>null</code> for all inputs. This class cannot
* be used for parsing.
*
* @param source the source string.
* @param parsePosition the parse position.
*
* @return <code>null</code>.
*/
public Number parse(String source, ParsePosition parsePosition) {
return null;
}
}
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