rosetta/src/main/java/com/att/rosetta/marshal/ObjMarshal.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
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  18  * * ============LICENSE_END====================================================\r
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  20  * * ECOMP is a trademark and service mark of AT&T Intellectual Property.\r
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  22  ******************************************************************************/\r
  23 package com.att.rosetta.marshal;\r
  24 \r
  25 import java.util.Iterator;\r
  26 \r
  27 import com.att.rosetta.Ladder;\r
  28 import com.att.rosetta.Marshal;\r
  29 import com.att.rosetta.ParseException;\r
  30 import com.att.rosetta.Parsed;\r
  31 \r
  32 /**\r
  33  * Object Marshal\r
  34  * Assumes has Fields and other Objects\r
  35  * s\r
  36  *\r
  37  * @param <T>\r
  38  */\r
  39 public abstract class ObjMarshal<T> extends Marshal<T> {\r
  40         // Note: Not Using List or ArrayList, because there is no "Peek" concept in their iterator.\r
  41         private Marshal<T>[] pml;\r
  42         private int end=0;\r
  43         \r
  44         /**\r
  45          * @param pm\r
  46          */\r
  47         @SuppressWarnings("unchecked")\r
  48         protected void add(Marshal<T> pm) {\r
  49                 if(pml==null) {\r
  50                         pml = new Marshal[Ladder.DEFAULT_INIT_SIZE]; \r
  51                 } else if(end>pml.length) {\r
  52                         Object temp[] = pml; \r
  53                         pml = new Marshal[pml.length+Ladder.DEFAULT_INIT_SIZE];\r
  54                         System.arraycopy(temp, 0, pml, 0, pml.length);\r
  55                 }\r
  56                 pml[end]=pm;\r
  57                 ++end;\r
  58         }\r
  59         \r
  60         /* (non-Javadoc)\r
  61          * @see com.att.rosetta.Parse#parse(java.lang.Object, com.att.rosetta.Parsed)\r
  62          */\r
  63         @SuppressWarnings("unchecked")\r
  64         @Override\r
  65         public Parsed<State> parse(T in, Parsed<State> parsed) throws ParseException {\r
  66                 Ladder<Iterator<?>> ladder = parsed.state.ladder;\r
  67                 Iterator<Marshal<T>> iter = (Iterator<Marshal<T>>)ladder.peek();\r
  68                 if(iter==null) {\r
  69                         if(pml.length>0) {\r
  70                                 ladder.push(new FieldsIterator());\r
  71                                 parsed.event = START_OBJ;\r
  72                         } else {\r
  73                                 ladder.push(DONE_ITERATOR);\r
  74                         }\r
  75                 } else if (DONE_ITERATOR.equals(iter)) {\r
  76                 } else {\r
  77                         FieldsIterator fields = (FieldsIterator)iter;\r
  78                         ladder.ascend(); // look at field info\r
  79                                 Iterator<?> currFieldIter = ladder.peek();\r
  80                                 Marshal<T> marshal;\r
  81                                 if(currFieldIter==null) {\r
  82                                         marshal=fields.next();\r
  83                                 } else if(!DONE_ITERATOR.equals(currFieldIter)) {\r
  84                                         marshal=fields.peek();\r
  85                                         if(marshal==null && fields.hasNext())marshal=fields.next();\r
  86                                 } else if(fields.hasNext()) {\r
  87                                         marshal=fields.next();\r
  88                                         ladder.push(null);\r
  89                                 } else {\r
  90                                         marshal=null;\r
  91                                 }\r
  92                                 \r
  93                                 if(marshal!=null)\r
  94                                         parsed = marshal.parse(in, parsed);\r
  95                         ladder.descend();\r
  96                         if(marshal==null || parsed.event==NONE) {\r
  97                                 parsed.event = END_OBJ;\r
  98                                 ladder.push(DONE_ITERATOR);\r
  99                         }\r
 100                 }\r
 101                 return parsed; // if unchanged, then it will end process\r
 102         }\r
 103 \r
 104         private class FieldsIterator implements Iterator<Marshal<T>> {\r
 105                 private int idx = -1;\r
 106 \r
 107                 @Override\r
 108                 public boolean hasNext() {\r
 109                         return idx<end;\r
 110                 }\r
 111 \r
 112                 @Override\r
 113                 public Marshal<T> next() {\r
 114                         return pml[++idx];\r
 115                 }\r
 116 \r
 117                 public Marshal<T> peek() {\r
 118                         return idx<0?null:pml[idx];\r
 119                 }\r
 120                 \r
 121                 @Override\r
 122                 public void remove() {\r
 123                         pml[idx]=null;\r
 124                 }\r
 125                 \r
 126         }\r
 127 \r
 128 }\r