content: /*
   * Copyright 1999-2018 Alibaba Group.
   *
   * 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.
   */
  package com.alibaba.fastjson.serializer;
  
  import java.io.IOException;
  import java.lang.reflect.Array;
  import java.lang.reflect.GenericArrayType;
  import java.lang.reflect.ParameterizedType;
  import java.lang.reflect.Type;
  import java.lang.reflect.TypeVariable;
  
  import com.alibaba.fastjson.JSONArray;
  import com.alibaba.fastjson.parser.DefaultJSONParser;
  import com.alibaba.fastjson.parser.JSONLexer;
  import com.alibaba.fastjson.parser.JSONToken;
  import com.alibaba.fastjson.parser.deserializer.ObjectDeserializer;
  import com.alibaba.fastjson.util.TypeUtils;
  
  /**
   * @author wenshao[szujobs@hotmail.com]
   */
  public class ObjectArrayCodec implements ObjectSerializer, ObjectDeserializer {
  
      public static final ObjectArrayCodec instance = new ObjectArrayCodec();
  
      public ObjectArrayCodec(){
      }
  
      public final void write(JSONSerializer serializer, Object object, Object fieldName, Type fieldType, int features)
                                                                                                         throws IOException {
          SerializeWriter out = serializer.out;
  
          Object[] array = (Object[]) object;
  
          if (object == null) {
              out.writeNull(SerializerFeature.WriteNullListAsEmpty);
              return;
          }
  
          int size = array.length;
  
          int end = size - 1;
  
          if (end == -1) {
              out.append("[]");
              return;
          }
  
          SerialContext context = serializer.context;
          serializer.setContext(context, object, fieldName, 0);
  
          try {
              Class<?> preClazz = null;
              ObjectSerializer preWriter = null;
              out.append('[');
  
              if (out.isEnabled(SerializerFeature.PrettyFormat)) {
                  serializer.incrementIndent();
                  serializer.println();
                  for (int i = 0; i < size; ++i) {
                      if (i != 0) {
                          out.write(',');
                          serializer.println();
                      }
                      serializer.writeWithFieldName(array[i], Integer.valueOf(i));
                  }
                  serializer.decrementIdent();
                  serializer.println();
                  out.write(']');
                  return;
              }
  
              for (int i = 0; i < end; ++i) {
                  Object item = array[i];
  
                  if (item == null) {
                      out.append("null,");
                  } else {
                      if (serializer.containsReference(item)) {
                          serializer.writeReference(item);
                      } else {
                          Class<?> clazz = item.getClass();
  
                          if (clazz == preClazz) {
                              preWriter.write(serializer, item, i, null, 0);
                          } else {
                              preClazz = clazz;
                              preWriter = serializer.getObjectWriter(clazz);
  
                              preWriter.write(serializer, item, i, null, 0);
                          }
                      }
                      out.append(',');
                  }
              }
  
              Object item = array[end];
  
              if (item == null) {
                  out.append("null]");
              } else {
                  if (serializer.containsReference(item)) {
                      serializer.writeReference(item);
                  } else {
                      serializer.writeWithFieldName(item, end);
                  }
                  out.append(']');
              }
          } finally {
              serializer.context = context;
          }
      }
      
      @SuppressWarnings({ "unchecked", "rawtypes" })
      public <T> T deserialze(DefaultJSONParser parser, Type type, Object fieldName) {
          final JSONLexer lexer = parser.lexer;
          int token = lexer.token();
          if (token == JSONToken.NULL) {
              lexer.nextToken(JSONToken.COMMA);
              return null;
          }
  
          if (token == JSONToken.LITERAL_STRING || token == JSONToken.HEX) {
              byte[] bytes = lexer.bytesValue();
              lexer.nextToken(JSONToken.COMMA);
  
              if (bytes.length == 0 && type != byte[].class) {
                  return null;
              }
  
              return (T) bytes;
          }
  
          Class componentClass;
          Type componentType;
          if (type instanceof GenericArrayType) {
              GenericArrayType clazz = (GenericArrayType) type;
              componentType = clazz.getGenericComponentType();
              if (componentType instanceof TypeVariable) {
                  TypeVariable typeVar = (TypeVariable) componentType;
                  Type objType = parser.getContext().type;
                  if (objType instanceof ParameterizedType) {
                      ParameterizedType objParamType = (ParameterizedType) objType;
                      Type objRawType = objParamType.getRawType();
                      Type actualType = null;
                      if (objRawType instanceof Class) {
                          TypeVariable[] objTypeParams = ((Class) objRawType).getTypeParameters();
                          for (int i = 0; i < objTypeParams.length; ++i) {
                              if (objTypeParams[i].getName().equals(typeVar.getName())) {
                                  actualType = objParamType.getActualTypeArguments()[i];
                              }
                          }
                      }
                      if (actualType instanceof Class) {
                          componentClass = (Class) actualType;
                      } else {
                          componentClass = Object.class;
                      }
                  } else {
                      componentClass = TypeUtils.getClass(typeVar.getBounds()[0]);
                  }
              } else {
                  componentClass = TypeUtils.getClass(componentType);
              }
          } else {
              Class clazz = (Class) type;
              componentType = componentClass = clazz.getComponentType();
          }
          JSONArray array = new JSONArray();
          parser.parseArray(componentType, array, fieldName);
  
          return (T) toObjectArray(parser, componentClass, array);
      }
  
      @SuppressWarnings("unchecked")
      private <T> T toObjectArray(DefaultJSONParser parser, Class<?> componentType, JSONArray array) {
          if (array == null) {
              return null;
          }
  
          int size = array.size();
  
          Object objArray = Array.newInstance(componentType, size);
          for (int i = 0; i < size; ++i) {
              Object value = array.get(i);
  
              if (value == array) {
                  Array.set(objArray, i, objArray);
                  continue;
              }
  
              if (componentType.isArray()) {
                  Object element;
                  if (componentType.isInstance(value)) {
                      element = value;
                  } else {
                      element = toObjectArray(parser, componentType, (JSONArray) value);
                  }
  
                  Array.set(objArray, i, element);
              } else {
                  Object element = null;
                  if (value instanceof JSONArray) {
                      boolean contains = false;
                      JSONArray valueArray = (JSONArray) value;
                      int valueArraySize = valueArray.size();
                      for (int y = 0; y < valueArraySize; ++y) {
                          Object valueItem = valueArray.get(y);
                          if (valueItem == array) {
                              valueArray.set(i, objArray);
                              contains = true;
                          }
                      }
                      if (contains) {
                          element = valueArray.toArray();
                      }
                  }
  
                  if (element == null) {
                      element = TypeUtils.cast(value, componentType, parser.getConfig());
                  }
                  Array.set(objArray, i, element);
  
              }
          }
  
          array.setRelatedArray(objArray);
          array.setComponentType(componentType);
          return (T) objArray; // TODO
      }
  
      public int getFastMatchToken() {
          return JSONToken.LBRACKET;
      }
  }
  