rosetta/src/main/java/org/onap/aaf/rosetta/InJson.java

   1 /*******************************************************************************\r
   2  * ============LICENSE_START====================================================\r
   3  * * org.onap.aaf\r
   4  * * ===========================================================================\r
   5  * * Copyright © 2017 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  * * ECOMP is a trademark and service mark of AT&T Intellectual Property.\r
  21  * *\r
  22  ******************************************************************************/\r
  23 package org.onap.aaf.rosetta;\r
  24 \r
  25 import java.io.IOException;\r
  26 import java.io.Reader;\r
  27 \r
  28 import org.onap.aaf.inno.env.Env;\r
  29 import org.onap.aaf.inno.env.TimeTaken;\r
  30 import org.onap.aaf.rosetta.InJson.State;\r
  31 \r
  32 public class InJson implements Parse<Reader, State> {\r
  33         public Parsed<State> parse(Reader r, Parsed<State> parsed) throws ParseException {\r
  34                 // First things first, if there's a "leftover" event, process that immediately\r
  35                 State state = (State)parsed.state;\r
  36                 if(state.unsent > 0) {\r
  37                         parsed.event = state.unsent;\r
  38                         state.unsent = 0;\r
  39                         return parsed;\r
  40                 }\r
  41                 \r
  42                 int ch;\r
  43                 char c;\r
  44                 StringBuilder sb = parsed.sb;\r
  45                 boolean inQuotes = false, escaped = false;\r
  46                 boolean go = true;\r
  47                 try {\r
  48                         // Gather data from Reader, looking for special characters when not in Quotes\r
  49                         while(go && (ch=r.read())>=0) {\r
  50                                 if(state.braces>=0 || ch==Parse.START_OBJ) { // ignore garbage/whitespace before content\r
  51                                         c=(char)ch;\r
  52                                         // Character is a quote.  \r
  53                                         if(c=='"') {\r
  54                                                 if(inQuotes) {\r
  55                                                         if(escaped) {  // if escaped Quote, add to data.\r
  56                                                                 sb.append(c);\r
  57                                                                 escaped = false;\r
  58                                                         } else {\r
  59                                                                 inQuotes = false;\r
  60                                                         }\r
  61                                                 } else {\r
  62                                                         parsed.isString=true;\r
  63                                                         inQuotes = true;\r
  64                                                 }\r
  65                                         } else { // Not a Quote\r
  66                                                 if(inQuotes) {\r
  67                                                         if(c=='\\') {\r
  68                                                                 if(escaped) {\r
  69                                                                         sb.append("\\\\");\r
  70                                                                         escaped = false;\r
  71                                                                 } else {\r
  72                                                                         escaped = true;\r
  73                                                                 }\r
  74                                                         } else {\r
  75                                                                 sb.append(c);\r
  76                                                         }\r
  77                                                 } else {\r
  78                                                         switch(c) {\r
  79                                                                 case ':':\r
  80                                                                         parsed.dataIsName();\r
  81                                                                         parsed.isString = false;\r
  82                                                                         break;\r
  83                                                                 case Parse.START_OBJ:\r
  84                                                                         if(state.braces++ == 0) {\r
  85                                                                                 parsed.event = START_DOC;\r
  86                                                                                 state.unsent = c;\r
  87                                                                         } else {\r
  88                                                                                 parsed.event = c;\r
  89                                                                         }\r
  90                                                                         go = false;\r
  91                                                                         break;\r
  92                                                                 case Parse.END_OBJ:\r
  93                                                                         if(--state.braces == 0) {\r
  94                                                                                 parsed.event = c;\r
  95                                                                                 state.unsent = END_DOC;\r
  96                                                                         } else {\r
  97                                                                                 parsed.event = c;\r
  98                                                                         }\r
  99                                                                         go = false;\r
 100                                                                         break;\r
 101                                                                 // These three end the data gathering, and send it along with the event that is ending the data gathering\r
 102                                                                 case Parse.NEXT:\r
 103                                                                         if(parsed.name.startsWith("__")) {\r
 104                                                                                 parsed.event = Parse.ATTRIB;\r
 105                                                                                 parsed.name = parsed.name.substring(2);\r
 106                                                                         } else {\r
 107                                                                                 parsed.event = c;\r
 108                                                                         }\r
 109                                                                         go = false;\r
 110                                                                         break;\r
 111                                                                 case Parse.START_ARRAY:\r
 112                                                                 case Parse.END_ARRAY:\r
 113                                                                         parsed.event = c;\r
 114                                                                         go = false;\r
 115                                                                         break;\r
 116                                                                                 \r
 117                                                                 // The Escape Sequence, for Quote marks within Quotes\r
 118                                                                 case '\\':\r
 119                                                                 // Ignore these, unless within quotes, at which point data-gather\r
 120                                                                 case ' ':\r
 121                                                                 case '\b':\r
 122                                                                 case '\f':\r
 123                                                                 case '\n':\r
 124                                                                 case '\r':\r
 125                                                                 case '\t':\r
 126                                                                         break;\r
 127                                                                 // Normal data... gather it\r
 128                                                                 default:\r
 129                                                                         sb.append(c);\r
 130                                                         }\r
 131                                                 }\r
 132                                         }\r
 133                                 }\r
 134                         }\r
 135                         return parsed;\r
 136                 } catch (IOException e) {\r
 137                         throw new ParseException(e);\r
 138                 }\r
 139         }\r
 140 \r
 141         public static class State {\r
 142                 public int braces = 0;\r
 143                 public char unsent = 0;\r
 144         }\r
 145         \r
 146 //      @Override\r
 147         public Parsed<State> newParsed() {\r
 148                 return new Parsed<State>(new State()); // no State needed\r
 149         }\r
 150 \r
 151 //      @Override\r
 152         public TimeTaken start(Env env) {\r
 153                 return env.start("Rosetta JSON In", Env.JSON);\r
 154         }\r
 155 }\r