Replaced with Map return type instead HashMap

[aai/data-router.git] / src / main / java / org / openecomp / datarouter / util / SearchSuggestionPermutation.java

diff --git a/src/main/java/org/openecomp/datarouter/util/SearchSuggestionPermutation.java b/src/main/java/org/openecomp/datarouter/util/SearchSuggestionPermutation.java
index fbf7c5b..0a72ce5 100644 (file)
--- a/src/main/java/org/openecomp/datarouter/util/SearchSuggestionPermutation.java
+++ b/src/main/java/org/openecomp/datarouter/util/SearchSuggestionPermutation.java
@@ -8,16 +8,16 @@
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
- *
- *       http://www.apache.org/licenses/LICENSE-2.0
- *
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  * ============LICENSE_END=========================================================
- *
+ * <p>
  * ECOMP is a trademark and service mark of AT&T Intellectual Property.
  */
 package org.openecomp.datarouter.util;
@@ -26,73 +26,73 @@ import java.util.ArrayList;
 import java.util.List;
 
 public class SearchSuggestionPermutation {
-  /*
-   * Will return all the unique combinations of the suggestions provided.
-   * The order of the permutation is not taken into account when computing
-   * the uniqueness.
-   * e.g.: A list of A,B,C,D will return
-   * [[A], [A, B, C, D], [A, C, D], [A, D], [B], [B, C, D], [B, D], [C], [C, D], [D]]
-   * 
-   * @param list The list of statuses to create permutations of
-   * @return     A list which contains a array list of all possible combinations
-   */
-  public static ArrayList<ArrayList<String>> getUniqueListForSuggestions(
-      List<String> originalList) {
-    ArrayList<ArrayList<String>> lists = new ArrayList<ArrayList<String>>();
-    if (originalList.isEmpty()) {
-      lists.add(new ArrayList<String>());
-      return lists;
-    }
-    List<String> list = new ArrayList<String>(originalList);
-    String head = list.get(0);
-    ArrayList<String> rest = new ArrayList<String>(list.subList(1, list.size()));
-    
-    for (ArrayList<String> activeList : getUniqueListForSuggestions(rest)) {
-      ArrayList<String> newList = new ArrayList<String>();
-      newList.add(head);
-      newList.addAll(activeList);
-      lists.add(newList);
-      lists.add(activeList);
-    }
-    return lists;
-  }
-  
-  public static ArrayList<ArrayList<String>> getNonEmptyUniqueLists(List<String> list){
-    ArrayList<ArrayList<String>> lists = getUniqueListForSuggestions(list);
-    // remove empty list from the power set 
-    for (ArrayList<String> emptyList : lists ){
-      if ( emptyList.isEmpty() ) {
-        lists.remove(emptyList);
-        break;
-      }
+    /*
+     * Will return all the unique combinations of the suggestions provided.
+     * The order of the permutation is not taken into account when computing
+     * the uniqueness.
+     * e.g.: A list of A,B,C,D will return
+     * [[A], [A, B, C, D], [A, C, D], [A, D], [B], [B, C, D], [B, D], [C], [C, D], [D]]
+     *
+     * @param list The list of statuses to create permutations of
+     * @return     A list which contains a array list of all possible combinations
+     */
+    public static ArrayList<ArrayList<String>> getUniqueListForSuggestions(
+            List<String> originalList) {
+        ArrayList<ArrayList<String>> lists = new ArrayList<>();
+        if (originalList.isEmpty()) {
+            lists.add(new ArrayList<String>());
+            return lists;
+        }
+        List<String> list = new ArrayList<>(originalList);
+        String head = list.get(0);
+        ArrayList<String> rest = new ArrayList<>(list.subList(1, list.size()));
+
+        for (ArrayList<String> activeList : getUniqueListForSuggestions(rest)) {
+            ArrayList<String> newList = new ArrayList<>();
+            newList.add(head);
+            newList.addAll(activeList);
+            lists.add(newList);
+            lists.add(activeList);
+        }
+        return lists;
     }
-    return lists;
-  }
 
-  public static List<List<String>> getListPermutations(List<String> list) {
-    List<String> inputList = new ArrayList<String>();
-    inputList.addAll(list);
-    if (inputList.size() == 0) {
-      List<List<String>> result = new ArrayList<List<String>>();
-      result.add(new ArrayList<String>());
-      return result;
+    public static ArrayList<ArrayList<String>> getNonEmptyUniqueLists(List<String> list) {
+        ArrayList<ArrayList<String>> lists = getUniqueListForSuggestions(list);
+        // remove empty list from the power set
+        for (ArrayList<String> emptyList : lists) {
+            if (emptyList.isEmpty()) {
+                lists.remove(emptyList);
+                break;
+            }
+        }
+        return lists;
     }
 
-    List<List<String>> listOfLists = new ArrayList<List<String>>();
+    public static List<List<String>> getListPermutations(List<String> list) {
+        List<String> inputList = new ArrayList<>();
+        inputList.addAll(list);
+        if (inputList.isEmpty()) {
+            List<List<String>> result = new ArrayList<>();
+            result.add(new ArrayList<String>());
+            return result;
+        }
+
+        List<List<String>> listOfLists = new ArrayList<>();
 
-    String firstElement = inputList.remove(0);
+        String firstElement = inputList.remove(0);
 
-    List<List<String>> recursiveReturn = getListPermutations(inputList);
-    for (List<String> li : recursiveReturn) {
+        List<List<String>> recursiveReturn = getListPermutations(inputList);
+        for (List<String> li : recursiveReturn) {
 
-      for (int index = 0; index <= li.size(); index++) {
-        List<String> temp = new ArrayList<String>(li);
-        temp.add(index, firstElement);
-        listOfLists.add(temp);
-      }
+            for (int index = 0; index <= li.size(); index++) {
+                List<String> temp = new ArrayList<>(li);
+                temp.add(index, firstElement);
+                listOfLists.add(temp);
+            }
 
+        }
+        return listOfLists;
     }
-    return listOfLists;
-  }
 
 }