misc/env/src/main/java/org/onap/aaf/misc/env/util/Split.java

   1 /**\r
   2  * ============LICENSE_START====================================================\r
   3  * org.onap.aaf\r
   4  * ===========================================================================\r
   5  * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.\r
   6  * ===========================================================================\r
   7  * Licensed under the Apache License, Version 2.0 (the "License");\r
   8  * you may not use this file except in compliance with the License.\r
   9  * You may obtain a copy of the License at\r
  10  * \r
  11  *      http://www.apache.org/licenses/LICENSE-2.0\r
  12  * \r
  13  * Unless required by applicable law or agreed to in writing, software\r
  14  * distributed under the License is distributed on an "AS IS" BASIS,\r
  15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\r
  16  * See the License for the specific language governing permissions and\r
  17  * limitations under the License.\r
  18  * ============LICENSE_END====================================================\r
  19  *\r
  20  */\r
  21 \r
  22 package org.onap.aaf.misc.env.util;\r
  23 \r
  24 /**\r
  25  * Split by Char, optional Trim\r
  26  * \r
  27  * Note: I read the String split and Pattern split code, and we can do this more efficiently for a single Character\r
  28  * \r
  29  * Jonathan 8/20/2015\r
  30  */\r
  31 \r
  32 public class Split {\r
  33           private static final String[] BLANK = new String[0];\r
  34           \r
  35           public static String[] split(char c, String value) {\r
  36                   if(value==null) {\r
  37                           return BLANK;\r
  38                   }\r
  39 \r
  40                   // Count items to preallocate Array (memory alloc is more expensive than counting twice)\r
  41                   int count,idx;\r
  42                   for(count=1,idx=value.indexOf(c);idx>=0;idx=value.indexOf(c,++idx),++count);\r
  43                   String[] rv = new String[count];\r
  44                   if(count==1) {\r
  45                           rv[0]=value;\r
  46                   } else {\r
  47                           int last=0;\r
  48                           count=-1;\r
  49                           for(idx=value.indexOf(c);idx>=0;idx=value.indexOf(c,idx)) {\r
  50                                   rv[++count]=value.substring(last,idx);\r
  51                                   last = ++idx;\r
  52                           }\r
  53                           rv[++count]=value.substring(last);\r
  54                   }\r
  55                   return rv;\r
  56           }\r
  57 \r
  58           public static String[] splitTrim(char c, String value) {\r
  59                   if(value==null) {\r
  60                           return BLANK;\r
  61                   }\r
  62                   // Count items to preallocate Array (memory alloc is more expensive than counting twice)\r
  63                   int count,idx;\r
  64                   for(count=1,idx=value.indexOf(c);idx>=0;idx=value.indexOf(c,++idx),++count);\r
  65                   String[] rv = new String[count];\r
  66                   if(count==1) {\r
  67                           rv[0]=value.trim();\r
  68                   } else {\r
  69                           int last=0;\r
  70                           count=-1;\r
  71                           for(idx=value.indexOf(c);idx>=0;idx=value.indexOf(c,idx)) {\r
  72                                   rv[++count]=value.substring(last,idx).trim();\r
  73                                   last = ++idx;\r
  74                           }\r
  75                           rv[++count]=value.substring(last).trim();\r
  76                   }\r
  77                   return rv;\r
  78           }\r
  79 \r
  80           public static String[] splitTrim(char c, String value, int size) {\r
  81                   if(value==null) {\r
  82                           return BLANK;\r
  83                   }\r
  84 \r
  85                   int idx;\r
  86                   String[] rv = new String[size];\r
  87                   if(size==1) {\r
  88                           rv[0]=value.trim();\r
  89                   } else {\r
  90                           int last=0;\r
  91                           int count=-1;\r
  92                           size-=2;\r
  93                           for(idx=value.indexOf(c);idx>=0 && count<size;idx=value.indexOf(c,idx)) {\r
  94                                   rv[++count]=value.substring(last,idx).trim();\r
  95                                   last = ++idx;\r
  96                           }\r
  97                           rv[++count]=value.substring(last).trim();\r
  98                   }\r
  99                   return rv;\r
 100           }\r
 101 \r
 102 }\r