com.sun.javafx.scene.shape.PathElementHelper Maven / Gradle / Ivy
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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package com.sun.javafx.scene.shape;
import com.sun.javafx.geom.Path2D;
import com.sun.javafx.util.Utils;
import javafx.scene.shape.PathElement;
/**
* Used to access internal methods of PathElement.
*/
public abstract class PathElementHelper {
private static PathElementAccessor pathElementAccessor;
static {
Utils.forceInit(PathElement.class);
}
protected PathElementHelper() {
}
private static PathElementHelper getHelper(PathElement pathElement) {
return pathElementAccessor.getHelper(pathElement);
}
protected static void setHelper(PathElement pathElement, PathElementHelper pathElementHelper) {
pathElementAccessor.setHelper(pathElement, pathElementHelper);
}
/*
* Static helper methods for cases where the implementation is done in an
* instance method that is overridden by subclasses.
* These methods exist in the base class only.
*/
public static void addTo(PathElement pathElement, Path2D path) {
getHelper(pathElement).addToImpl(pathElement, path);
}
/*
* Methods that will be overridden by subclasses
*/
protected abstract void addToImpl(PathElement pathElement, Path2D path);
/*
* Methods used by PathElement (base) class only
*/
public static void setPathElementAccessor(final PathElementAccessor newAccessor) {
if (pathElementAccessor != null) {
throw new IllegalStateException();
}
pathElementAccessor = newAccessor;
}
public interface PathElementAccessor {
PathElementHelper getHelper(PathElement pathElement);
void setHelper(PathElement pathElement, PathElementHelper pathElementHelper);
}
}