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This is a backport of OpenJFX 8 to run on Java 7.
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/*
 * Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * 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).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package com.sun.javafx.cursor;

import java.util.HashMap;
import java.util.Map;

/**
 * Represents a frame of an animated cursor (ImageCursor created from an
 * animated image), non animated cursors and standard cursors have only a single
 * CursorFrame.
 */
public abstract class CursorFrame {
    public abstract CursorType getCursorType();

    private Class firstPlatformCursorClass;
    private Object firstPlatformCursor;

    private Map, Object> otherPlatformCursors;

    public  T getPlatformCursor(final Class platformCursorClass) {
        if (firstPlatformCursorClass == platformCursorClass) {
            return (T) firstPlatformCursor;
        }

        if (otherPlatformCursors != null) {
            return (T) otherPlatformCursors.get(platformCursorClass);
        }

        return null;
    }

    public  void setPlatforCursor(final Class platformCursorClass,
                                     final T platformCursor) {

        if ((firstPlatformCursorClass == null)
                || (firstPlatformCursorClass == platformCursorClass)) {
            // most common case
            firstPlatformCursorClass = platformCursorClass;
            firstPlatformCursor = platformCursor;
            return;
        }

        if (otherPlatformCursors == null) {
            otherPlatformCursors = new HashMap, Object>();
        }

        otherPlatformCursors.put(platformCursorClass, platformCursor);
    }
}