/*

 * 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 com.alibaba.fastjson.util.TypeUtils;



import java.io.IOException;

import java.lang.reflect.Type;

import java.util.List;



/**

 * @author wenshao[szujobs@hotmail.com]

 */

public final class ListSerializer implements ObjectSerializer {



    public static final ListSerializer instance = new ListSerializer();



    public final void write(JSONSerializer serializer, Object object, Object fieldName, Type fieldType, int features)

                                                                                                       throws IOException {



        boolean writeClassName = serializer.out.isEnabled(SerializerFeature.WriteClassName)

                || SerializerFeature.isEnabled(features, SerializerFeature.WriteClassName);



        SerializeWriter out = serializer.out;



        Type elementType = null;

        if (writeClassName) {

            elementType = TypeUtils.getCollectionItemType(fieldType);

        }



        if (object == null) {

            out.writeNull(SerializerFeature.WriteNullListAsEmpty);

            return;

        }



        List<?> list = (List<?>) object;



        if (list.size() == 0) {

            out.append("[]");

            return;

        }



        SerialContext context = serializer.context;

        serializer.setContext(context, object, fieldName, 0);



        ObjectSerializer itemSerializer = null;

        try {

            if (out.isEnabled(SerializerFeature.PrettyFormat)) {

                out.append('[');

                serializer.incrementIndent();



                int i = 0;

                for (Object item : list) {

                    if (i != 0) {

                        out.append(',');

                    }



                    serializer.println();

                    if (item != null) {

                        if (serializer.containsReference(item)) {

                            serializer.writeReference(item);

                        } else {

                            itemSerializer = serializer.getObjectWriter(item.getClass());

                            SerialContext itemContext = new SerialContext(context, object, fieldName, 0, 0);

                            serializer.context = itemContext;

                            itemSerializer.write(serializer, item, i, elementType, features);

                        }

                    } else {

                        serializer.out.writeNull();

                    }

                    i++;

                }



                serializer.decrementIdent();

                serializer.println();

                out.append(']');

                return;

            }



            out.append('[');

            for (int i = 0, size = list.size(); i < size; ++i) {

                Object item = list.get(i);

                if (i != 0) {

                    out.append(',');

                }

                

                if (item == null) {

                    out.append("null");

                } else {

                    Class<?> clazz = item.getClass();



                    if (clazz == Integer.class) {

                        out.writeInt(((Integer) item).intValue());

                    } else if (clazz == Long.class) {

                        long val = ((Long) item).longValue();

                        if (writeClassName) {

                            out.writeLong(val);

                            out.write('L');

                        } else {

                            out.writeLong(val);

                        }

                    } else {

                        if ((SerializerFeature.DisableCircularReferenceDetect.mask & features) != 0){

                            itemSerializer = serializer.getObjectWriter(item.getClass());

                            itemSerializer.write(serializer, item, i, elementType, features);

                        }else {

                            if (!out.disableCircularReferenceDetect) {

                                SerialContext itemContext = new SerialContext(context, object, fieldName, 0, 0);

                                serializer.context = itemContext;

                            }



                            if (serializer.containsReference(item)) {

                                serializer.writeReference(item);

                            } else {

                                itemSerializer = serializer.getObjectWriter(item.getClass());

                                if ((SerializerFeature.WriteClassName.mask & features) != 0

                                        && itemSerializer instanceof JavaBeanSerializer)

                                {

                                    JavaBeanSerializer javaBeanSerializer = (JavaBeanSerializer) itemSerializer;

                                    javaBeanSerializer.writeNoneASM(serializer, item, i, elementType, features);

                                } else {

                                    itemSerializer.write(serializer, item, i, elementType, features);

                                }

                            }

                        }

                    }

                }

            }

            out.append(']');

        } finally {

            serializer.context = context;

        }

    }



}