misc/rosetta/src/main/java/org/onap/aaf/misc/rosetta/marshal/ObjArray.java

   1 /**
   2  * ============LICENSE_START====================================================
   3  * org.onap.aaf
   4  * ===========================================================================
   5  * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
   6  * ===========================================================================
   7  * Licensed under the Apache License, Version 2.0 (the "License");
   8  * you may not use this file except in compliance with the License.
   9  * You may obtain a copy of the License at
  10  *
  11  *      http://www.apache.org/licenses/LICENSE-2.0
  12  *
  13  * Unless required by applicable law or agreed to in writing, software
  14  * distributed under the License is distributed on an "AS IS" BASIS,
  15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16  * See the License for the specific language governing permissions and
  17  * limitations under the License.
  18  * ============LICENSE_END====================================================
  19  *
  20  */
  21
  22 package org.onap.aaf.misc.rosetta.marshal;
  23
  24 import java.util.Iterator;
  25 import java.util.List;
  26
  27 import org.onap.aaf.misc.rosetta.Ladder;
  28 import org.onap.aaf.misc.rosetta.Marshal;
  29 import org.onap.aaf.misc.rosetta.ParseException;
  30 import org.onap.aaf.misc.rosetta.Parsed;
  31
  32
  33 public abstract class ObjArray<T,S> extends Marshal<T> {
  34         private String name;
  35         private Marshal<S> subMarshaller;
  36
  37         public ObjArray(String name, Marshal<S> subMarshaller) {
  38                 this.name = name;
  39                 this.subMarshaller = subMarshaller;
  40         }
  41
  42         @SuppressWarnings("unchecked")
  43         @Override
  44         public Parsed<State> parse(T t, Parsed<State> parsed) throws ParseException {
  45                 Ladder<Iterator<?>> ladder = parsed.state.ladder;
  46                 Iterator<?> iter = ladder.peek();
  47                 if(iter==null) {
  48                         List<S> list = data(t);
  49                         if(list.isEmpty() && parsed.state.smallest) {
  50                                 ladder.push(DONE_ITERATOR);
  51                         } else {
  52                                 ladder.push(new ListIterator<S>(list));
  53                                 parsed.event = START_ARRAY;
  54                                 parsed.name = name;
  55                         }
  56                 } else if (DONE_ITERATOR.equals(iter)) {
  57                 } else {
  58                         ladder.ascend(); // look at field info
  59                                 Iterator<?> memIter = ladder.peek();
  60                                 ListIterator<S> mems = (ListIterator<S>)iter;
  61                                 S mem;
  62                                 if(memIter==null) {
  63                                         mem=mems.next();
  64                                 } else if(!DONE_ITERATOR.equals(memIter)) {
  65                                         mem=mems.peek();
  66                                 } else if(iter.hasNext()) {
  67                                         mem=null;
  68                                         ladder.push(null);
  69                                 } else {
  70                                         mem=null;
  71                                 }
  72
  73                                 if(mem!=null)
  74                                         parsed = subMarshaller.parse(mem, parsed);
  75                         ladder.descend();
  76                         if(mem==null) {
  77                                 if(iter.hasNext()) {
  78                                         parsed.event = NEXT;
  79                                 } else {
  80                                         parsed.event = END_ARRAY;
  81                                         ladder.push(DONE_ITERATOR);
  82                                 }
  83                         }
  84                 }
  85                 return parsed; // if unchanged, then it will end process
  86         }
  87
  88         protected abstract List<S> data(T t);
  89
  90 }