FilesExpand file tree

 master

/

Reflection.java

Copy path

Blame

More file actions

Blame

More file actions

Latest commit

 

History

History

History

181 lines (153 loc) · 6.63 KB

 master

/

Reflection.java

Copy path

Top

File metadata and controls

• Code
• Blame

181 lines (153 loc) · 6.63 KB

Raw

Copy raw file

Download raw file

Open symbols panel

Edit and raw actions

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

75

76

77

78

79

80

81

82

83

84

85

86

87

88

89

90

91

92

93

94

95

96

97

98

99

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

import java.lang.reflect.Constructor;

import java.lang.reflect.Field;

import java.lang.reflect.Method;

import java.lang.reflect.Modifier;

import java.util.Scanner;

class Reflection {

Reflection() {

}

/* рефлексия по имени класса */

public static String disassembleClass(String nameClass) {

Class cls;

try {

cls = Class.forName(nameClass);

nameClass = disassembleClass(cls);

} catch (ClassNotFoundException ignored) {

}

return nameClass;

}

/* рефлексия по объекту типа Class */

public static String disassembleClass(Class cls) {

String str;

if (cls.isPrimitive()) str = ifPrimitive(cls);

else if (cls.isArray()) str = ifArray(cls);

else if (cls.isInterface()) str = ifInterface(cls);

else str = ifClass(cls);

return str;

}

// если примитивный тип

private static String ifPrimitive(Class cls) {

return cls.getSimpleName();

}

private static String ifArray(Class cls) {

return (cls.getSimpleName());

}

private static String ifInterface(Class cls) {

return "\tModifiers - " + getModifiers(cls.getModifiers()) + "\n" +

"\tPackage name - " + cls.getPackage().getName() + "\n" +

"\tName - " + cls.getSimpleName() + "\n" +

"\tSuperclass - " + cls.getSuperclass() + "\n\n" +

"\tInterfaces: \n" + getInterfaces(cls.getInterfaces()) + "\n" +

"\tFields: " + "\n" + getFields(cls.getFields()) + getFields(cls.getDeclaredFields()) +

"\tMethods: " + "\n" + getMethods(cls.getMethods()) + getMethods(cls.getDeclaredMethods());

}

// если класс (интерфейс + конструкторы)

private static String ifClass(Class cls) {

return ifInterface(cls) +

"\tConstructors:\n" + getConstructors(cls.getConstructors());

}

private static String getModifiers(int n) {

StringBuilder builder = new StringBuilder();

if (Modifier.isPublic(n)) builder.append("public ");

if (Modifier.isProtected(n)) builder.append("protected ");

if (Modifier.isPrivate(n)) builder.append("private ");

if (Modifier.isStatic(n)) builder.append("static ");

if (Modifier.isFinal(n)) builder.append("final ");

if (Modifier.isAbstract(n)) builder.append("abstract ");

if (Modifier.isInterface(n)) builder.append("interface ");

if (Modifier.isNative(n)) builder.append("native ");

if (Modifier.isSynchronized(n)) builder.append("synchronized ");

if (Modifier.isStrict(n)) builder.append("strict ");

if (Modifier.isTransient(n)) builder.append("transient ");

if (Modifier.isVolatile(n)) builder.append("volatile ");

return builder.toString();

}

private static String getFields(Field[] fields) {

StringBuilder builder = new StringBuilder();

for (Field field : fields) {

builder.append(field.toString());

builder.append("\n");

}

return builder.toString();

}

private static String getMethods(Method[] methods) {

StringBuilder builder = new StringBuilder();

for (Method method : methods) {

builder.append(method);

builder.append("\n");

}

return builder.toString();

}

private static String getConstructors(Constructor[] constructors) {

StringBuilder builder = new StringBuilder();

for (Constructor constructor : constructors) {

builder.append(constructor);

builder.append("\n");

}

return builder.toString();

}

private static String getInterfaces(Class[] interfaces) {

StringBuilder builder = new StringBuilder();

for (Class anInterface : interfaces) {

builder.append(anInterface);

builder.append("\n");

}

return builder.toString();

}

/* рефлексия по объекту + вызов метода */

public static void disassembleClass(DemoClass object) throws IllegalAccessException, FunctionNotFoundException {

boolean flag = false;

Scanner in = new Scanner(System.in);

Class cls = object.getClass();

Method[] methods = cls.getMethods();

System.out.println(disassembleObject(object));

System.out.print("Enter name method: ");

String nameMethod = in.next();

for (Method method : methods) {

if (method.getName().equals(nameMethod)) flag = true;

if (method.getName().equals(nameMethod)) {

try {

System.out.println("Result: " + method.invoke(object));

flag = true;

} catch (Exception ignored) {

}

}

}

if (!flag) throw new FunctionNotFoundException("Method not found!");

}

// разбор объекта на составляющие

private static String disassembleObject(DemoClass object) throws IllegalArgumentException,

IllegalAccessException, SecurityException {

Class cls = object.getClass();

StringBuilder builder = new StringBuilder();

builder.append("\tClass: ").append(getModifiers(cls.getModifiers())).append(cls.getName());

builder.append("\n\tFields:" + "\n");

Field[] fields = cls.getDeclaredFields();

for (Field field : fields) {

field.setAccessible(true);

builder.append(field.toString()).append(" = ").append(field.get(object));

builder.append("\n");

}

builder.append("\tMethods:" + "\n");

Method[] methods = cls.getMethods();

builder.append(getMethods(methods));

return builder.toString();

}

// запуск метода по заданому имени класса, названию метода и списка передаваемых параметров

public static void tryRunMethod(DemoClass object, String nameMethod, Object... parameters) throws SecurityException,

IllegalArgumentException, FunctionNotFoundException {

boolean flag = false;

Class cls = object.getClass();

Method[] methods = cls.getDeclaredMethods();

for (Method method : methods) {

if (method.getName().equals(nameMethod)) {

try {

method.invoke(object, parameters);

flag = true;

} catch (Exception ignored) {

}

}

}

if (!flag) throw new FunctionNotFoundException("Method not found!");

}

}