content: package act.util;
  
  /*-
   * #%L
   * ACT Framework
   * %%
   * Copyright (C) 2014 - 2017 ActFramework
   * %%
   * 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.
   * #L%
   */
  
  /*
   * Copyright 1999-2101 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.
   */
  
  import com.alibaba.fastjson.serializer.*;
  
  import java.io.IOException;
  import java.lang.reflect.ParameterizedType;
  import java.lang.reflect.Type;
  import java.util.HashSet;
  import java.util.TreeSet;
  
  /**
   * @author wenshao[szujobs@hotmail.com]
   */
  public class FastJsonIterableSerializer implements ObjectSerializer {
  
      public final static FastJsonIterableSerializer instance = new FastJsonIterableSerializer();
  
      public void write(JSONSerializer serializer, Object object, Object fieldName, Type fieldType, int features) throws IOException {
          SerializeWriter out = serializer.getWriter();
  
          if (object == null) {
              if (out.isEnabled(SerializerFeature.WriteNullListAsEmpty)) {
                  out.write("[]");
              } else {
                  out.writeNull();
              }
              return;
          }
  
          Type elementType = null;
          if (serializer.isEnabled(SerializerFeature.WriteClassName)) {
              if (fieldType instanceof ParameterizedType) {
                  ParameterizedType param = (ParameterizedType) fieldType;
                  elementType = param.getActualTypeArguments()[0];
              }
          }
  
          Iterable<?> iterable = (Iterable<?>) object;
  
          SerialContext context = serializer.getContext();
          serializer.setContext(context, object, fieldName, 0);
  
          if (serializer.isEnabled(SerializerFeature.WriteClassName)) {
              if (HashSet.class == iterable.getClass()) {
                  out.append("Set");
              } else if (TreeSet.class == iterable.getClass()) {
                  out.append("TreeSet");
              }
          }
  
          try {
              int i = 0;
              out.append('[');
              for (Object item : iterable) {
  
                  if (i++ != 0) {
                      out.append(',');
                  }
  
                  if (item == null) {
                      out.writeNull();
                      continue;
                  }
  
                  Class<?> clazz = item.getClass();
  
                  if (clazz == Integer.class) {
                      out.writeInt(((Integer) item).intValue());
                      continue;
                  }
  
                  if (clazz == Long.class) {
                      out.writeLong(((Long) item).longValue());
  
                      if (out.isEnabled(SerializerFeature.WriteClassName)) {
                          out.write('L');
                      }
                      continue;
                  }
  
                  ObjectSerializer itemSerializer = serializer.getObjectWriter(clazz);
                  itemSerializer.write(serializer, item, i - 1, elementType, 0);
              }
              out.append(']');
          } finally {
              serializer.setContext(context);
          }
      }
  
  }
  