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我有一個實現這樣一個比較類:如何使用Java自定義比較訂購火花RDD
public class MyObject<T>
{
public static class MyObjectComp<T> implements Comparator<MyObject<T>>
{
private LinkedHashSet<Integer> attrList;
public MyObjectComp (int[] intList)
{
this.attrList = new LinkedHashSet<Integer>();
for (int idx: intList)
attrList.add(idx);
}
public MyObjectComp (LinkedHashSet<Integer> attrList)
{
this.attrList = attrList;
}
public int compare(MyObject<T> pf1, MyObject<T> pf2)
{
for (Integer idx: attrList)
{
double pf1Norm = pf1.atribute.get(idx).myList.size();
double pf2Norm = pf2.atribute.get(idx).myList.size();
if (pf1Norm > pf2Norm)
return 1;
else if (pf1Norm < pf2Norm)
return -1;
}
return (pf1.key > pf2.key) ? 1 : ((pf1.key < pf2.key) ? -1 : 0);
}
}
}
在用Scala編寫代碼的另一部分我創建了一個RDD本爲MyObject 。現在我需要使用MyObject的這個內部比較器類來排序此RDD的元素。我怎麼能做到這一點使用像myRDD. sort()?