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/*
 * Copyright (C) 2014 Square, Inc.
 *
 * 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.squareup.moshi;

import com.jn.langx.annotation.Nullable;

import java.io.IOException;
import java.lang.annotation.Annotation;
import java.lang.reflect.Array;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;

/**
 * Converts arrays to JSON arrays containing their converted contents. This
 * supports both primitive and object arrays.
 */
final class ArrayJsonAdapter extends JsonAdapter {
    public static final Factory FACTORY = new Factory() {
        @Override
        public @Nullable
        JsonAdapter create(
                Type type, Set annotations, Moshi moshi) {
            Type elementType = Types.arrayComponentType(type);
            if (elementType == null) {
                return null;
            }
            if (!annotations.isEmpty()) {
                return null;
            }
            Class elementClass = Types.getRawType(elementType);
            JsonAdapter elementAdapter = moshi.adapter(elementType);
            return new ArrayJsonAdapter(elementClass, elementAdapter).nullSafe();
        }
    };

    private final Class elementClass;
    private final JsonAdapter elementAdapter;

    ArrayJsonAdapter(Class elementClass, JsonAdapter elementAdapter) {
        this.elementClass = elementClass;
        this.elementAdapter = elementAdapter;
    }

    @Override
    public Object fromJson(JsonReader reader) throws IOException {
        List list = new ArrayList();
        reader.beginArray();
        while (reader.hasNext()) {
            list.add(elementAdapter.fromJson(reader));
        }
        reader.endArray();
        Object array = Array.newInstance(elementClass, list.size());
        for (int i = 0; i < list.size(); i++) {
            Array.set(array, i, list.get(i));
        }
        return array;
    }

    @Override
    public void toJson(JsonWriter writer, Object value) throws IOException {
        writer.beginArray();
        for (int i = 0, size = Array.getLength(value); i < size; i++) {
            elementAdapter.toJson(writer, Array.get(value, i));
        }
        writer.endArray();
    }

    @Override
    public String toString() {
        return elementAdapter + ".array()";
    }
}
    

    

    

            

    

            



    
    






    
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