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ChartHints.java
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ChartHints.java
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/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2020, 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.]
*
* ---------------
* ChartHints.java
* ---------------
* (C) Copyright 2014, by Object Refinery Limited and Contributors.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): -;
*
* Changes
* -------
* 27-Jun-2014 : Version 1 (DG);
*
*/
package org.jfree.chart;
import java.util.Map;
/**
* Special rendering hints that can be used internally by JFreeChart or by
* specialised implementations of the {@code Graphics2D} API. For example,
* JFreeSVG's {@code SVGGraphics2D} class, will use the
* {@code KEY_BEGIN_ELEMENT} and {@code KEY_END_ELEMENT} hints to drive the
* output content.
*
* @since 1.0.18
*/
public final class ChartHints {
private ChartHints() {
// no need to instantiate this
}
/**
* The key for a hint to signal the beginning of an element. The value
* should be a string containing the element id or, alternatively, a Map
* containing the 'id' (String) and 'ref' (String in JSON format).
*/
public static final Key KEY_BEGIN_ELEMENT = new ChartHints.Key(0);
/**
* The key for a hint that ends an element.
*/
public static final Key KEY_END_ELEMENT = new ChartHints.Key(1);
/**
* A key for rendering hints that can be used with JFreeChart (in
* addition to the regular Java2D rendering hints).
*/
public static class Key extends java.awt.RenderingHints.Key {
/**
* Creates a new key.
*
* @param privateKey the private key.
*/
public Key(int privateKey) {
super(privateKey);
}
/**
* Returns {@code true} if {@code val} is a value that is
* compatible with this key, and {@code false} otherwise.
*
* @param val the value.
*
* @return A boolean.
*/
@Override
public boolean isCompatibleValue(Object val) {
switch (intKey()) {
case 0:
return val == null || val instanceof String
|| val instanceof Map;
case 1:
return val == null || val instanceof Object;
default:
throw new RuntimeException("Not possible!");
}
}
}
}