GWT覆盖深层复制 [英] GWT Overlay deep copy

问题描述

我正在寻找一个检查GWT覆盖和克隆的函数或库它。它必须能够克隆包含的数组或对象。

谢谢

解决方案

<基于Lineman78的答案并考虑到其他answer 我创建了以下函数：

  public class JsoUtils {
 
 @SuppressWarnings（unchecked）
 public static< T extends JavaScriptObject> T deepCopy（T obj）
 {
 return（T）deepCopyImpl（obj）; 
 
 
 private static native JavaScriptObject deepCopyImpl（JavaScriptObject obj）/ *  -  {
 $ b $ if（obj == null）return obj; 
 
 var copy; 
 
 if（obj instanceof Date）{
 // Handle Date 
 copy = new Date（）; 
 copy.setTime（obj.getTime（））; 
} else if（obj instanceof Array）{
 // Handle Array 
 copy = []; 
 for（var i = 0，len = obj.length; i< len; i ++）{
 if（obj [i] == null || typeof obj [i]！=object ）copy [i] = obj [i]; 
 else copy [i] = @ com.amindea.noah.client.utils.JsoUtils :: deepCopyImpl（Lcom / google / gwt / core / client / JavaScriptObject;）（obj [i]）; 
} 
} else {
 //处理对象
 copy = {}; 
 for（var attr in obj）{
 if（obj.hasOwnProperty（attr））{
 if（obj [attr] == null || typeof obj [attr]！=object ）copy [attr] = obj [attr]; 
 else copy [attr] = @ com.amindea.noah.client.utils.JsoUtils :: deepCopyImpl（Lcom / google / gwt / core / client / JavaScriptObject;）（obj [attr]）; 
} 
} 
} 
返回副本; 
}  -  * /; 
 
 
 
 
 
 
 
它支持对象，数组，日期，字符串，数字或布尔值。正如 A.所解释的那样。 Levy ，只要对象和数组中的数据形成树结构，该函数就会工作。
 
What is the best way to make a deep copy of a gwt overlay type?

I'm looking for a function or library that inspects a GWT overlay and clones it. It must be able to clone contained arrays or objects.

Thanks
解决方案
Based on Lineman78's answer and taking into consideration this other answer from A. Levy I created the following function:
public class JsoUtils {

    @SuppressWarnings("unchecked")
    public static <T extends JavaScriptObject> T deepCopy(T obj)
    {
        return (T) deepCopyImpl(obj);
    }

    private static native JavaScriptObject deepCopyImpl(JavaScriptObject obj) /*-{

        if (obj == null) return obj;

        var copy;        

        if (obj instanceof Date) {
            // Handle Date
            copy = new Date();
            copy.setTime(obj.getTime());
        } else if (obj instanceof Array) {
             // Handle Array
            copy = [];
            for (var i = 0, len = obj.length; i < len; i++) {
                if (obj[i] == null || typeof obj[i] != "object") copy[i] = obj[i];
                else copy[i] = @com.amindea.noah.client.utils.JsoUtils::deepCopyImpl(Lcom/google/gwt/core/client/JavaScriptObject;)(obj[i]);
            }
        } else {
            // Handle Object
            copy = {};
            for (var attr in obj) {
                if (obj.hasOwnProperty(attr)) {
                    if (obj[attr] == null || typeof obj[attr] != "object") copy[attr] = obj[attr];
                    else copy[attr] = @com.amindea.noah.client.utils.JsoUtils::deepCopyImpl(Lcom/google/gwt/core/client/JavaScriptObject;)(obj[attr]);
                }
            }
        }        
        return copy;
    }-*/;

} 
It supports deep copy of Object, Array, Date, String, Number, or Boolean. As explained by A. Levy the function will work as long as the data in the objects and arrays form a tree structure.

                        
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