/*
 * Copyright (c) 2001-2008 Caucho Technology, Inc.  All rights reserved.
 *
 * The Apache Software License, Version 1.1
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:
 *       "This product includes software developed by the
 *        Caucho Technology (http://www.caucho.com/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The names "Burlap", "Resin", and "Caucho" must not be used to
 *    endorse or promote products derived from this software without prior
 *    written permission. For written permission, please contact
 *    info@caucho.com.
 *
 * 5. Products derived from this software may not be called "Resin"
 *    nor may "Resin" appear in their names without prior written
 *    permission of Caucho Technology.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL CAUCHO TECHNOLOGY OR ITS CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * @author Scott Ferguson
 */

package com.alibaba.com.caucho.hessian.io;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Date;

/**
 * Serializing an object for known object types.
 */
public class BasicDeserializer extends AbstractDeserializer {
    public static final int NULL = BasicSerializer.NULL;
    public static final int BOOLEAN = BasicSerializer.BOOLEAN;
    public static final int BYTE = BasicSerializer.BYTE;
    public static final int SHORT = BasicSerializer.SHORT;
    public static final int INTEGER = BasicSerializer.INTEGER;
    public static final int LONG = BasicSerializer.LONG;
    public static final int FLOAT = BasicSerializer.FLOAT;
    public static final int DOUBLE = BasicSerializer.DOUBLE;
    public static final int CHARACTER = BasicSerializer.CHARACTER;
    public static final int CHARACTER_OBJECT = BasicSerializer.CHARACTER_OBJECT;
    public static final int STRING = BasicSerializer.STRING;
    public static final int DATE = BasicSerializer.DATE;
    public static final int NUMBER = BasicSerializer.NUMBER;
    public static final int OBJECT = BasicSerializer.OBJECT;

    public static final int BOOLEAN_ARRAY = BasicSerializer.BOOLEAN_ARRAY;
    public static final int BYTE_ARRAY = BasicSerializer.BYTE_ARRAY;
    public static final int SHORT_ARRAY = BasicSerializer.SHORT_ARRAY;
    public static final int INTEGER_ARRAY = BasicSerializer.INTEGER_ARRAY;
    public static final int LONG_ARRAY = BasicSerializer.LONG_ARRAY;
    public static final int FLOAT_ARRAY = BasicSerializer.FLOAT_ARRAY;
    public static final int DOUBLE_ARRAY = BasicSerializer.DOUBLE_ARRAY;
    public static final int CHARACTER_ARRAY = BasicSerializer.CHARACTER_ARRAY;
    public static final int STRING_ARRAY = BasicSerializer.STRING_ARRAY;
    public static final int OBJECT_ARRAY = BasicSerializer.OBJECT_ARRAY;

    private int _code;

    public BasicDeserializer(int code) {
        _code = code;
    }

    @Override
    public Class getType() {
        switch (_code) {
            case NULL:
                return void.class;
            case BOOLEAN:
                return Boolean.class;
            case BYTE:
                return Byte.class;
            case SHORT:
                return Short.class;
            case INTEGER:
                return Integer.class;
            case LONG:
                return Long.class;
            case FLOAT:
                return Float.class;
            case DOUBLE:
                return Double.class;
            case CHARACTER:
                return Character.class;
            case CHARACTER_OBJECT:
                return Character.class;
            case STRING:
                return String.class;
            case DATE:
                return Date.class;
            case NUMBER:
                return Number.class;
            case OBJECT:
                return Object.class;

            case BOOLEAN_ARRAY:
                return boolean[].class;
            case BYTE_ARRAY:
                return byte[].class;
            case SHORT_ARRAY:
                return short[].class;
            case INTEGER_ARRAY:
                return int[].class;
            case LONG_ARRAY:
                return long[].class;
            case FLOAT_ARRAY:
                return float[].class;
            case DOUBLE_ARRAY:
                return double[].class;
            case CHARACTER_ARRAY:
                return char[].class;
            case STRING_ARRAY:
                return String[].class;
            case OBJECT_ARRAY:
                return Object[].class;
            default:
                throw new UnsupportedOperationException();
        }
    }

    @Override
    public Object readObject(AbstractHessianInput in)
            throws IOException {
        if (in.checkAndReadNull()) {
            return null;
        }
        switch (_code) {
            case NULL:
                // hessian/3490
                in.readObject();

                return null;

            case BOOLEAN:
                return Boolean.valueOf(in.readBoolean());

            case BYTE:
                return Byte.valueOf((byte) in.readInt());

            case SHORT:
                return Short.valueOf((short) in.readInt());

            case INTEGER:
                return Integer.valueOf(in.readInt());

            case LONG:
                return Long.valueOf(in.readLong());

            case FLOAT:
                return Float.valueOf((float) in.readDouble());

            case DOUBLE:
                return Double.valueOf(in.readDouble());

            case STRING:
                return in.readString();

            case OBJECT:
                return in.readObject();

            case CHARACTER: {
                String s = in.readString();
                if (s == null || s.equals(""))
                    return Character.valueOf((char) 0);
                else
                    return Character.valueOf(s.charAt(0));
            }

            case CHARACTER_OBJECT: {
                String s = in.readString();
                if (s == null || s.equals(""))
                    return null;
                else
                    return Character.valueOf(s.charAt(0));
            }

            case DATE:
                return new Date(in.readUTCDate());

            case NUMBER:
                return in.readObject();

            case BYTE_ARRAY:
                return in.readBytes();

            case CHARACTER_ARRAY: {
                String s = in.readString();

                if (s == null)
                    return null;
                else {
                    int len = s.length();
                    char[] chars = new char[len];
                    s.getChars(0, len, chars, 0);
                    return chars;
                }
            }

            case BOOLEAN_ARRAY:
            case SHORT_ARRAY:
            case INTEGER_ARRAY:
            case LONG_ARRAY:
            case FLOAT_ARRAY:
            case DOUBLE_ARRAY:
            case STRING_ARRAY: {
                int code = in.readListStart();

                switch (code) {
                    case 'N':
                        return null;

                    case 0x10:
                    case 0x11:
                    case 0x12:
                    case 0x13:
                    case 0x14:
                    case 0x15:
                    case 0x16:
                    case 0x17:
                    case 0x18:
                    case 0x19:
                    case 0x1a:
                    case 0x1b:
                    case 0x1c:
                    case 0x1d:
                    case 0x1e:
                    case 0x1f:
                        int length = code - 0x10;
                        in.readInt();

                        return readLengthList(in, length);

                    default:
                        String type = in.readType();
                        length = in.readLength();

                        return readList(in, length);
                }
            }

            default:
                throw new UnsupportedOperationException();
        }
    }

    @Override
    public Object readList(AbstractHessianInput in, int length)
            throws IOException {
        switch (_code) {
            case BOOLEAN_ARRAY: {
                if (length >= 0) {
                    boolean[] data = new boolean[length];

                    in.addRef(data);

                    for (int i = 0; i < data.length; i++)
                        data[i] = in.readBoolean();

                    in.readEnd();

                    return data;
                } else {
                    ArrayList list = new ArrayList();

                    while (!in.isEnd())
                        list.add(Boolean.valueOf(in.readBoolean()));

                    in.readEnd();

                    boolean[] data = new boolean[list.size()];

                    in.addRef(data);

                    for (int i = 0; i < data.length; i++)
                        data[i] = ((Boolean) list.get(i)).booleanValue();

                    return data;
                }
            }

            case SHORT_ARRAY: {
                if (length >= 0) {
                    short[] data = new short[length];

                    in.addRef(data);

                    for (int i = 0; i < data.length; i++)
                        data[i] = (short) in.readInt();

                    in.readEnd();

                    return data;
                } else {
                    ArrayList list = new ArrayList();

                    while (!in.isEnd())
                        list.add(Short.valueOf((short) in.readInt()));

                    in.readEnd();

                    short[] data = new short[list.size()];
                    for (int i = 0; i < data.length; i++)
                        data[i] = ((Short) list.get(i)).shortValue();

                    in.addRef(data);

                    return data;
                }
            }

            case INTEGER_ARRAY: {
                if (length >= 0) {
                    int[] data = new int[length];

                    in.addRef(data);

                    for (int i = 0; i < data.length; i++)
                        data[i] = in.readInt();

                    in.readEnd();

                    return data;
                } else {
                    ArrayList list = new ArrayList();

                    while (!in.isEnd())
                        list.add(Integer.valueOf(in.readInt()));


                    in.readEnd();

                    int[] data = new int[list.size()];
                    for (int i = 0; i < data.length; i++)
                        data[i] = ((Integer) list.get(i)).intValue();

                    in.addRef(data);

                    return data;
                }
            }

            case LONG_ARRAY: {
                if (length >= 0) {
                    long[] data = new long[length];

                    in.addRef(data);

                    for (int i = 0; i < data.length; i++)
                        data[i] = in.readLong();

                    in.readEnd();

                    return data;
                } else {
                    ArrayList list = new ArrayList();

                    while (!in.isEnd())
                        list.add(Long.valueOf(in.readLong()));

                    in.readEnd();

                    long[] data = new long[list.size()];
                    for (int i = 0; i < data.length; i++)
                        data[i] = ((Long) list.get(i)).longValue();

                    in.addRef(data);

                    return data;
                }
            }

            case FLOAT_ARRAY: {
                if (length >= 0) {
                    float[] data = new float[length];
                    in.addRef(data);

                    for (int i = 0; i < data.length; i++)
                        data[i] = (float) in.readDouble();

                    in.readEnd();

                    return data;
                } else {
                    ArrayList list = new ArrayList();

                    while (!in.isEnd())
                        list.add(new Float(in.readDouble()));

                    in.readEnd();

                    float[] data = new float[list.size()];
                    for (int i = 0; i < data.length; i++)
                        data[i] = ((Float) list.get(i)).floatValue();

                    in.addRef(data);

                    return data;
                }
            }

            case DOUBLE_ARRAY: {
                if (length >= 0) {
                    double[] data = new double[length];
                    in.addRef(data);

                    for (int i = 0; i < data.length; i++)
                        data[i] = in.readDouble();

                    in.readEnd();

                    return data;
                } else {
                    ArrayList list = new ArrayList();

                    while (!in.isEnd())
                        list.add(new Double(in.readDouble()));

                    in.readEnd();

                    double[] data = new double[list.size()];
                    in.addRef(data);
                    for (int i = 0; i < data.length; i++)
                        data[i] = ((Double) list.get(i)).doubleValue();

                    return data;
                }
            }

            case STRING_ARRAY: {
                if (length >= 0) {
                    String[] data = new String[length];
                    in.addRef(data);

                    for (int i = 0; i < data.length; i++)
                        data[i] = in.readString();

                    in.readEnd();

                    return data;
                } else {
                    ArrayList list = new ArrayList();

                    while (!in.isEnd())
                        list.add(in.readString());

                    in.readEnd();

                    String[] data = new String[list.size()];
                    in.addRef(data);
                    for (int i = 0; i < data.length; i++)
                        data[i] = (String) list.get(i);

                    return data;
                }
            }

            case OBJECT_ARRAY: {
                if (length >= 0) {
                    Object[] data = new Object[length];
                    in.addRef(data);

                    for (int i = 0; i < data.length; i++)
                        data[i] = in.readObject();

                    in.readEnd();

                    return data;
                } else {
                    ArrayList list = new ArrayList();

                    in.addRef(list); // XXX: potential issues here

                    while (!in.isEnd())
                        list.add(in.readObject());

                    in.readEnd();

                    Object[] data = new Object[list.size()];
                    for (int i = 0; i < data.length; i++)
                        data[i] = (Object) list.get(i);

                    return data;
                }
            }

            default:
                throw new UnsupportedOperationException(String.valueOf(this));
        }
    }

    @Override
    public Object readLengthList(AbstractHessianInput in, int length)
            throws IOException {
        switch (_code) {
            case BOOLEAN_ARRAY: {
                boolean[] data = new boolean[length];

                in.addRef(data);

                for (int i = 0; i < data.length; i++)
                    data[i] = in.readBoolean();

                return data;
            }

            case SHORT_ARRAY: {
                short[] data = new short[length];

                in.addRef(data);

                for (int i = 0; i < data.length; i++)
                    data[i] = (short) in.readInt();

                return data;
            }

            case INTEGER_ARRAY: {
                int[] data = new int[length];

                in.addRef(data);

                for (int i = 0; i < data.length; i++)
                    data[i] = in.readInt();

                return data;
            }

            case LONG_ARRAY: {
                long[] data = new long[length];

                in.addRef(data);

                for (int i = 0; i < data.length; i++)
                    data[i] = in.readLong();

                return data;
            }

            case FLOAT_ARRAY: {
                float[] data = new float[length];
                in.addRef(data);

                for (int i = 0; i < data.length; i++)
                    data[i] = (float) in.readDouble();

                return data;
            }

            case DOUBLE_ARRAY: {
                double[] data = new double[length];
                in.addRef(data);

                for (int i = 0; i < data.length; i++)
                    data[i] = in.readDouble();

                return data;
            }

            case STRING_ARRAY: {
                String[] data = new String[length];
                in.addRef(data);

                for (int i = 0; i < data.length; i++)
                    data[i] = in.readString();

                return data;
            }

            case OBJECT_ARRAY: {
                Object[] data = new Object[length];
                in.addRef(data);

                for (int i = 0; i < data.length; i++)
                    data[i] = in.readObject();

                return data;
            }

            default:
                throw new UnsupportedOperationException(String.valueOf(this));
        }
    }

    public String toString()
    {
        return getClass().getSimpleName() + "[" + _code + "]";
    }
}