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1 package com.thoughtworks.xstream.converters.reflection;
2
3 import sun.misc.Unsafe;
4 import sun.reflect.ReflectionFactory;
5
6 import java.lang.reflect.Constructor  ;
7 import java.lang.reflect.Field ;
8 import java.lang.reflect.InvocationTargetException ;
9 import java.util.HashMap ;
10 import java.util.Map ;
11
12
20 public class Sun14ReflectionProvider extends PureJavaReflectionProvider {
21
22 private static final ReflectionFactory reflectionFactory = ReflectionFactory.getReflectionFactory();
23 private static final Map constructorCache = new HashMap ();
24 private static Unsafe cachedUnsafe;
25
26 private Unsafe getUnsafe() throws ClassNotFoundException , NoSuchFieldException , IllegalAccessException {
27 if (cachedUnsafe != null) {
28 return cachedUnsafe;
29 }
30 Class objectStreamClass = Class.forName("java.io.ObjectStreamClass$FieldReflector");
31 Field unsafeField = objectStreamClass.getDeclaredField("unsafe");
32 unsafeField.setAccessible(true);
33 cachedUnsafe = (Unsafe) unsafeField.get(null);
34 return cachedUnsafe;
35 }
36
37 public Object newInstance(Class type) {
38 try {
39 Constructor customConstructor = getMungedConstructor(type);
40 Object newValue = customConstructor.newInstance(new Object [0]);
41 return newValue;
42 } catch (NoSuchMethodException e) {
43 throw new ObjectAccessException("Cannot construct " + type.getName(), e);
44 } catch (SecurityException e) {
45 throw new ObjectAccessException("Cannot construct " + type.getName(), e);
46 } catch (InstantiationException e) {
47 throw new ObjectAccessException("Cannot construct " + type.getName(), e);
48 } catch (IllegalAccessException e) {
49 throw new ObjectAccessException("Cannot construct " + type.getName(), e);
50 } catch (IllegalArgumentException e) {
51 throw new ObjectAccessException("Cannot construct " + type.getName(), e);
52 } catch (InvocationTargetException e) {
53 throw new ObjectAccessException("Cannot construct " + type.getName(), e);
54 }
55 }
56
57 private Constructor getMungedConstructor(Class type) throws NoSuchMethodException {
58 if (!constructorCache.containsKey(type)) {
59 Constructor javaLangObjectConstructor = Object .class.getDeclaredConstructor(new Class [0]);
60 Constructor customConstructor = reflectionFactory.newConstructorForSerialization(type, javaLangObjectConstructor);
61 constructorCache.put(type, customConstructor);
62 }
63 return (Constructor ) constructorCache.get(type);
64 }
65
66 public void writeField(Object object, String fieldName, Object value, Class definedIn) {
67 write(fieldDictionary.field(object.getClass(), fieldName, definedIn), object, value);
68 }
69
70 private void write(Field field, Object object, Object value) {
71 try {
72 Unsafe unsafe = getUnsafe();
73 long offset = unsafe.objectFieldOffset(field);
74 Class type = field.getType();
75 if (type.isPrimitive()) {
76 if (type.equals(Integer.TYPE)) {
77 unsafe.putInt(object, offset, ((Integer ) value).intValue());
78 } else if (type.equals(Long.TYPE)) {
79 unsafe.putLong(object, offset, ((Long ) value).longValue());
80 } else if (type.equals(Short.TYPE)) {
81 unsafe.putShort(object, offset, ((Short ) value).shortValue());
82 } else if (type.equals(Character.TYPE)) {
83 unsafe.putChar(object, offset, ((Character ) value).charValue());
84 } else if (type.equals(Byte.TYPE)) {
85 unsafe.putByte(object, offset, ((Byte ) value).byteValue());
86 } else if (type.equals(Float.TYPE)) {
87 unsafe.putFloat(object, offset, ((Float ) value).floatValue());
88 } else if (type.equals(Double.TYPE)) {
89 unsafe.putDouble(object, offset, ((Double ) value).doubleValue());
90 } else if (type.equals(Boolean.TYPE)) {
91 unsafe.putBoolean(object, offset, ((Boolean ) value).booleanValue());
92 } else {
93 throw new ObjectAccessException("Could not set field " +
94 object.getClass() + "." + field.getName() +
95 ": Unknown type " + type);
96 }
97 } else {
98 unsafe.putObject(object, offset, value);
99 }
100
101 } catch (IllegalArgumentException e) {
102 throw new ObjectAccessException("Could not set field " + object.getClass() + "." + field.getName(), e);
103 } catch (IllegalAccessException e) {
104 throw new ObjectAccessException("Could not set field " + object.getClass() + "." + field.getName(), e);
105 } catch (NoSuchFieldException e) {
106 throw new ObjectAccessException("Could not set field " + object.getClass() + "." + field.getName(), e);
107 } catch (ClassNotFoundException e) {
108 throw new ObjectAccessException("Could not set field " + object.getClass() + "." + field.getName(), e);
109 }
110 }
111
112 protected void validateFieldAccess(Field field) {
113 }
115 }
116 |
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