com.alibaba.fastjson.asm

类 ClassWriter

java.lang.Object

com.alibaba.fastjson.asm.ClassWriter

public class ClassWriter
extends Object

A ClassVisitor that generates classes in bytecode form. More precisely this visitor generates a byte array conforming to the Java class file format. It can be used alone, to generate a Java class "from scratch", or with one or more and adapter class visitor to generate a modified class from one or more existing Java classes.

作者:

Eric Bruneton

字段概要

字段

限定符和类型	字段和说明
static int	COMPUTE_FRAMES Flag to automatically compute the stack map frames of methods from scratch.
static int	COMPUTE_MAXS Flag to automatically compute the maximum stack size and the maximum number of local variables of methods.

构造器概要

构造器

构造器和说明
ClassWriter()

方法概要

方法

限定符和类型	方法和说明
int	newClass(String value)
int	newNameType(String name, String desc)
int	newUTF8(String value)
byte[]	toByteArray() Returns the bytecode of the class that was build with this class writer.
void	visit(int version, int access, String name, String superName, String[] interfaces)
void	visitEnd()
FieldVisitor	visitField(int access, String name, String desc)
MethodVisitor	visitMethod(int access, String name, String desc, String signature, String[] exceptions)

从类继承的方法 java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

字段详细资料

COMPUTE_MAXS

public static final int COMPUTE_MAXS

Flag to automatically compute the maximum stack size and the maximum number of local variables of methods. If this flag is set, then the arguments of the visitMaxs method of the MethodVisitor returned by the visitMethod method will be ignored, and computed automatically from the signature and the bytecode of each method.

另请参阅:

ClassWriter(int), 常量字段值

COMPUTE_FRAMES

public static final int COMPUTE_FRAMES

Flag to automatically compute the stack map frames of methods from scratch. If this flag is set, then the calls to the MethodVisitor#visitFrame method are ignored, and the stack map frames are recomputed from the methods bytecode. The arguments of the visitMaxs method are also ignored and recomputed from the bytecode. In other words, computeFrames implies computeMaxs.

另请参阅:

ClassWriter(int), 常量字段值

构造器详细资料

ClassWriter

public ClassWriter()

方法详细资料

visit

public void visit(int version,
         int access,
         String name,
         String superName,
         String[] interfaces)

visitField

public FieldVisitor visitField(int access,
                      String name,
                      String desc)

visitMethod

public MethodVisitor visitMethod(int access,
                        String name,
                        String desc,
                        String signature,
                        String[] exceptions)

visitEnd

public void visitEnd()

toByteArray

public byte[] toByteArray()

Returns the bytecode of the class that was build with this class writer.

返回:

the bytecode of the class that was build with this class writer.

newUTF8

public int newUTF8(String value)

newClass

public int newClass(String value)

newNameType

public int newNameType(String name,
              String desc)