SimpleMock

/*
 * File：SimpleMock.java
 * User：xiaocao000 
 * Date：2009-8-1
 */
package com.xiaocao000.lang;

import java.lang.reflect.AccessibleObject;
import java.lang.reflect.Array;
import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * SimpleMock<br>
 * SimpleMock 1. primitive array 2. inner class
 * @author xiaocao000
 * @version 1.0
 */
public class SimpleMock
{
    private static final int UNKNOWN_TYPE = -1;
    private static final int VOID = 0;
    private static final int BYTE = 1;
    private static final int SHORT = 2;
    private static final int INT = 3;
    private static final int LONG = 4;
    private static final int FLOAT = 5;
    private static final int DOUBLE = 6;
    private static final int CHAR = 7;
    private static final int BOOLEAN = 8;
    private static final int STRING = 9;
    private static final int DATE = 10;
    private static final int CALENDAR = 11;
    
    private static final int OBJECT = 99;
    private static final int CLASS = 98;
    

    private static Map<Class<?>, Integer> classMap = new HashMap<Class<?>, Integer>();
    static
    {
        classMap.put(void.class, VOID);
        classMap.put(byte.class, BYTE);
        classMap.put(short.class, SHORT);
        classMap.put(int.class, INT);
        classMap.put(long.class, LONG);
        classMap.put(float.class, FLOAT);
        classMap.put(double.class, DOUBLE);
        classMap.put(char.class, CHAR);
        classMap.put(boolean.class, BOOLEAN);
        classMap.put(Void.class, VOID);
        classMap.put(Byte.class, BYTE);
        classMap.put(Short.class, SHORT);
        classMap.put(Integer.class, INT);
        classMap.put(Long.class, LONG);
        classMap.put(Float.class, FLOAT);
        classMap.put(Double.class, DOUBLE);
        classMap.put(Character.class, CHAR);
        classMap.put(Boolean.class, BOOLEAN);
        classMap.put(String.class, STRING);
        classMap.put(Date.class, DATE);
        classMap.put(Calendar.class, CALENDAR);
        classMap.put(Object.class, OBJECT);
        classMap.put(Class.class, CLASS);
    }

    private static Integer getJavaType(Class<?> clazz)
    {
        if (classMap.containsKey(clazz))
        {
            return classMap.get(clazz);
        }

        return UNKNOWN_TYPE;
    }

    private static <T> T getValue(Class<T> clazz)
    {
        Object value = null;
        int javaType = getJavaType(clazz);
        switch (javaType)
        {
            case BYTE:
            {
                value = SimpleRandom.getByte();
                break;
            }
            case SHORT:
            {
                value = SimpleRandom.getShort();
                break;
            }
            case INT:
            {
                value = SimpleRandom.getInt();
                break;
            }
            case LONG:
            {
                value = SimpleRandom.getLong();
                break;
            }
            case FLOAT:
            {
                value = SimpleRandom.getFloat();
                break;
            }
            case DOUBLE:
            {
                value = SimpleRandom.getDouble();
                break;
            }
            case CHAR:
            {
                value = SimpleRandom.getCharacter();
                break;
            }
            case BOOLEAN:
            {
                value = SimpleRandom.getBoolean();
                break;
            }
            case STRING:
            {
                value = SimpleRandom.getString();
                break;
            }
            case DATE:
            {
                value = SimpleRandom.getDate();
                break;
            }
            case CALENDAR:
            {
                value = SimpleRandom.getCalendar();
                break;
            }
            case UNKNOWN_TYPE:
            {
                // TODO Inner Class 
//                if (clazz.getSimpleName().indexOf("$") != -1)
//                {
//                    System.out.println("innerClass:" + clazz.getName());
//                    value = null;
//                    break;
//                }
                value = mockObject(clazz);
                break;
            }
            case OBJECT:
            case CLASS:
            case VOID:
            default:
            {
                value = null;
                break;
            }
        }
        return (T)value;
    }
    

    /**
     * 模拟对象
     * @param <T> 
     * @param clazz
     * @return
     */
    public static <T> T mockObject(Class<T> clazz)
    {
        if (classMap.containsKey(clazz))
        {
            return (T)getValue(clazz);
        }
        
        T obj = null;
        try
        {
            obj = clazz.newInstance();
            // Field[] fields = clazz.getDeclaredFields();
            Field[] fields = ClassUtil.getAllField(clazz);
            AccessibleObject.setAccessible(fields, true);
            
            for (Field field : fields)
            {
                if (ObjectUtil.isIgnoreField(field))
                {
                    continue;
                }
                field.set(obj, getValue(field.getType()));
            }
        }
        catch (Exception e)
        {
            return null;
        }

        return obj;
    }
    
    /**
     * 模拟对象数组 
     * @param <T> 
     * @param clazz
     * @return
     */
    public static <T> T[] mockObjectArray(Class<T> clazz, int length)
    {
        length = (length > 0) ? length : 0;
        
        Object array = Array.newInstance(clazz, length);
        for (int i = 0; i < length; i++)
        {
            Array.set(array, i, mockObject(clazz));
        }
        System.out.println(ObjectUtil.toString(array));
        return (T[])array;
        
//        T[] t = null;
//        if (clazz.isPrimitive())
//        {
//            // TODO primitive array 
//            // Object array = new Integer[length];
//            // System.out.println(clazz);
//            // t = (T[])array;
//        }
//        else
//        {
//            t = (T[])Array.newInstance(clazz, length);
//        }
//        
//        for (int i = 0; i < length; i++)
//        {
//            // t[i] = mockObject(clazz);
//            Array.set(t, i, mockObject(clazz));
//        }
//        return t;
    }
    
    /**
     * 模拟对象List 
     * @param <T> List元素类型
     * @param valueType List元素Class类型
     * @return 模拟对象List 
     */
    public static <T> List<T> mockObjectList(Class<T> valueType, int size)
    {
        int length = (size > 0) ? size : 0;
        List<T> list = new ArrayList<T>(length);
        for (int i = 0; i < length; i++)
        {
            list.add(mockObject(valueType));
        }
        return list;
    }
    
    /**
     * 模拟对象Map
     * @param <K> Key的类型
     * @param <V> Value的类型
     * @param keys Key值数组
     * @param valueType value的Class Type
     * @return 模拟对象Map
     */
    public static <K,V> Map<K,V> mockObjectMap(K[] keys, Class<V> valueType)
    {
        int length = (keys == null) ? 0 : keys.length;
        
        Map<K,V> map = new HashMap<K,V>(length);
        for (int i = 0; i < length; i++)
        {
            map.put(keys[i], mockObject(valueType));
        }
        return map;
    }

    /**
     * 模拟对象Map
     * @param <K> Key的类型
     * @param <V> Value的类型
     * @param keyType Key的Class Type
     * @param valueType value的Class Type
     * @param size 要模拟的Map大小
     * @return 模拟的对象Map
     */
    public static <K,V> Map<K,V> mockObjectMap(Class<K> keyType, Class<V> valueType, int size)
    {
        int length = (size > 0) ? size : 0;
        
        Map<K,V> map = new HashMap<K,V>(length);
        for (int i = 0; i < length; i++)
        {
            map.put(mockObject(keyType), mockObject(valueType));
        }
        return map;
    }
}