From b4922d319d293894fddd512d29b5f0d1411915d9 Mon Sep 17 00:00:00 2001
From: ARULNA <arul.nambi@amdocs.com>
Date: Mon, 12 Jun 2017 16:41:12 -0400
Subject: Initial commit for AAI-UI(sparky-backend)

Change-Id: I785397ed4197663cdf0c1351041d2f708ed08763
Signed-off-by: ARULNA <arul.nambi@amdocs.com>
---
 .../sparky/util/SuggestionsPermutation.java        | 82 ++++++++++++++++++++++
 1 file changed, 82 insertions(+)
 create mode 100644 src/main/java/org/openecomp/sparky/util/SuggestionsPermutation.java

(limited to 'src/main/java/org/openecomp/sparky/util/SuggestionsPermutation.java')

diff --git a/src/main/java/org/openecomp/sparky/util/SuggestionsPermutation.java b/src/main/java/org/openecomp/sparky/util/SuggestionsPermutation.java
new file mode 100644
index 0000000..876b2f4
--- /dev/null
+++ b/src/main/java/org/openecomp/sparky/util/SuggestionsPermutation.java
@@ -0,0 +1,82 @@
+/**
+ * ============LICENSE_START===================================================
+ * SPARKY (AAI UI service)
+ * ============================================================================
+ * Copyright © 2017 AT&T Intellectual Property.
+ * Copyright © 2017 Amdocs
+ * All rights reserved.
+ * ============================================================================
+ * 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
+ *
+ * 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=====================================================
+ *
+ * ECOMP and OpenECOMP are trademarks
+ * and service marks of AT&T Intellectual Property.
+ */
+package org.openecomp.sparky.util;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class SuggestionsPermutation {
+  
+  /*
+   * Will return all the unique combinations of the suggestions provided.
+   * The order of the permutation is not taken into account when computing
+   * the uniqueness.
+   * eg: 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 to create the unique permutations
+   * @return    A Arraylist which contains a array list of all possible combinations
+   */
+  @SuppressWarnings("serial")
+  public ArrayList<ArrayList<String>> getSuggestionsPermutation(List<String> list) {
+    List<String> statusList = new ArrayList<>(list);
+    List<String> dupStatusList;
+    ArrayList<ArrayList<String>> uniqueList = new ArrayList<ArrayList<String>>();
+    int mainLoopIndexCounter = 0;
+    for (String status : statusList) {
+      // Add the single entity subset
+      uniqueList.add(new ArrayList<String>() {
+        {
+          add(status);
+        }
+      });
+      // Remove all the elements to left till the current index
+      dupStatusList = truncateListUntill(statusList, mainLoopIndexCounter);
+
+      while (dupStatusList.size() > 0) {
+        ArrayList<String> suggListInIterate= new ArrayList<>();
+        suggListInIterate.add(status);
+        for (String dupStatus : dupStatusList) {
+          suggListInIterate.add(dupStatus);
+        }
+        uniqueList.add(suggListInIterate);
+        dupStatusList.remove(0);
+      }
+      mainLoopIndexCounter++;
+    }
+    return uniqueList;
+
+  }
+
+  private List<String> truncateListUntill(List<String> lists, int index) {
+    List<String> truncatedList = new ArrayList<>(lists);
+    int counter = 0;
+    while (counter <= index) {
+      truncatedList.remove(0);
+      counter++;
+    }
+    return truncatedList;
+  }
+}
-- 
cgit 1.2.3-korg