/*
 * Copyright (C) 2015 - 2016, Daniel Dahan and CosmicMind, Inc. <http://cosmicmind.com>.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *	*	Redistributions of source code must retain the above copyright notice, this
 *		list of conditions and the following disclaimer.
 *
 *	*	Redistributions in binary form must reproduce the above copyright notice,
 *		this list of conditions and the following disclaimer in the documentation
 *		and/or other materials provided with the distribution.
 *
 *	*	Neither the name of CosmicMind nor the names of its
 *		contributors may be used to endorse or promote products derived from
 *		this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/**
 Gets the Obj-C reference for the instance object within the UIView extension.
 - Parameter base: Base object.
 - Parameter key: Memory key pointer.
 - Parameter initializer: Object initializer.
 - Returns: The associated reference for the initializer object.
 */
internal func AssociatedObject<T: Any>(base: Any, key: UnsafePointer<UInt8>, initializer: () -> T) -> T {
    if let v: T = objc_getAssociatedObject(base, key) as? T {
        return v
    }
    
    let v: T = initializer()
    objc_setAssociatedObject(base, key, v, .OBJC_ASSOCIATION_RETAIN)
    return v
}

/**
 Sets the Obj-C reference for the instance object within the UIView extension.
 - Parameter base: Base object.
 - Parameter key: Memory key pointer.
 - Parameter value: The object instance to set for the associated object.
 - Returns: The associated reference for the initializer object.
 */
internal func AssociateObject<T: Any>(base: Any, key: UnsafePointer<UInt8>, value: T) {
    objc_setAssociatedObject(base, key, value, .OBJC_ASSOCIATION_RETAIN)
}
