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Hprose is a High Performance Remote Object Service Engine. It is a modern, lightweight, cross-language, cross-platform, object-oriented, high performance, remote dynamic communication middleware. It is not only easy to use, but powerful. You just need a little time to learn, then you can use it to easily construct cross language cross platform distributed application system. Hprose supports many programming languages, for example: * AAuto Quicker * ActionScript * ASP * C++ * Dart * Delphi/Free Pascal * dotNET(C#, Visual Basic...) * Golang * Java * JavaScript * Node.js * Objective-C * Perl * PHP * Python * Ruby * ... Through Hprose, You can conveniently and efficiently intercommunicate between those programming languages. This project is the implementation of Hprose for Java.

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/**********************************************************\
|                                                          |
|                          hprose                          |
|                                                          |
| Official WebSite: http://www.hprose.com/                 |
|                   http://www.hprose.org/                 |
|                                                          |
\**********************************************************/
/**********************************************************\
 *                                                        *
 * CollectionUnserializer.java                            *
 *                                                        *
 * Collection unserializer class for Java.                *
 *                                                        *
 * LastModified: Apr 17, 2016                             *
 * Author: Ma Bingyao                   *
 *                                                        *
\**********************************************************/

package hprose.io.unserialize;

import hprose.common.HproseException;
import static hprose.io.HproseTags.TagList;
import static hprose.io.HproseTags.TagNull;
import static hprose.io.HproseTags.TagOpenbrace;
import static hprose.io.HproseTags.TagRef;
import hprose.io.accessor.ConstructorAccessor;
import hprose.util.ClassUtil;
import java.io.IOException;
import java.io.InputStream;
import java.lang.reflect.Modifier;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.nio.ByteBuffer;
import java.util.Collection;

final class CollectionUnserializer implements Unserializer {

    public final static CollectionUnserializer instance = new CollectionUnserializer();

    @SuppressWarnings({"unchecked"})
    private static  Collection readCollection(Reader reader, ByteBuffer buffer, Class cls, Class componentClass, Type componentType) throws IOException {
        int tag = buffer.get();
        switch (tag) {
            case TagNull: return null;
            case TagList: {
                int count = ValueReader.readInt(buffer, TagOpenbrace);
                Collection a = (Collection)ConstructorAccessor.newInstance(cls);
                reader.refer.set(a);
                Unserializer unserializer = UnserializerFactory.get(componentClass);
                for (int i = 0; i < count; ++i) {
                    a.add((T)unserializer.read(reader, buffer, componentClass, componentType));
                }
                buffer.get();
                return a;
            }
            case TagRef: return (Collection)reader.readRef(buffer);
            default: throw ValueReader.castError(reader.tagToString(tag), cls);
        }
    }

    @SuppressWarnings({"unchecked"})
    private static  Collection readCollection(Reader reader, InputStream stream, Class cls, Class componentClass, Type componentType) throws IOException {
        int tag = stream.read();
        switch (tag) {
            case TagNull: return null;
            case TagList: {
                int count = ValueReader.readInt(stream, TagOpenbrace);
                Collection a = (Collection)ConstructorAccessor.newInstance(cls);
                reader.refer.set(a);
                Unserializer unserializer = UnserializerFactory.get(componentClass);
                for (int i = 0; i < count; ++i) {
                    a.add((T)unserializer.read(reader, stream, componentClass, componentType));
                }
                stream.read();
                return a;
            }
            case TagRef: return (Collection)reader.readRef(stream);
            default: throw ValueReader.castError(reader.tagToString(tag), cls);
        }
    }

    final static Collection readCollection(Reader reader, ByteBuffer buffer, Class cls, Type type) throws IOException {
        Type componentType;
        Class componentClass;
        if (type instanceof ParameterizedType) {
            componentType = ((ParameterizedType)type).getActualTypeArguments()[0];
            componentClass = ClassUtil.toClass(componentType);
        }
        else {
            componentType = Object.class;
            componentClass = Object.class;
        }
        return readCollection(reader, buffer, cls, componentClass, componentType);
    }

    final static Collection readCollection(Reader reader, InputStream stream, Class cls, Type type) throws IOException {
        Type componentType;
        Class componentClass;
        if (type instanceof ParameterizedType) {
            componentType = ((ParameterizedType)type).getActualTypeArguments()[0];
            componentClass = ClassUtil.toClass(componentType);
        }
        else {
            componentType = Object.class;
            componentClass = Object.class;
        }
        return readCollection(reader, stream, cls, componentClass, componentType);
    }

    public final Object read(Reader reader, ByteBuffer buffer, Class cls, Type type) throws IOException {
        if (!Modifier.isInterface(cls.getModifiers()) && !Modifier.isAbstract(cls.getModifiers())) {
            return readCollection(reader, buffer, cls, type);
        }
        else {
            throw new HproseException(type.toString() + " is not an instantiable class.");
        }
    }

    public final Object read(Reader reader, InputStream stream, Class cls, Type type) throws IOException {
        if (!Modifier.isInterface(cls.getModifiers()) && !Modifier.isAbstract(cls.getModifiers())) {
            return readCollection(reader, stream, cls, type);
        }
        else {
            throw new HproseException(type.toString() + " is not an instantiable class.");
        }
    }

}