jclass

package module
v1.3.0 Latest Latest
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 Go to latest Published: Jul 14, 2017 License: Apache-2.0 Imports: 9 Imported by: 1

README

jclass

Golang library for Java class file format.

install:

go get github.com/wdsgyj/jclass

demo:

go get github.com/wdsgyj/jclass/cmd/jprint
jprint xxx.class

Documentation

Index

Constants

View Source 
const (
	MAGIC uint32 = 0xCAFEBABE
	DEBUG bool   = false
)

Variables

View Source 
var (
	ERR_NOT_CLASS_FILE = errors.New("not class file")
)

Functions

This section is empty.

Types

type Annotation 

type Annotation struct {
	TypeIndex            uint16
	NumElementValuePairs uint16
	ElementValuePairs    []*ElementValuePair
	// contains filtered or unexported fields
}

func NewAnnotation 

func NewAnnotation(r io.Reader, buf []byte, cp []*ConstantPoolInfo) (*Annotation, []byte, error)

func (*Annotation) ConstantPoolInfo 

func (a *Annotation) ConstantPoolInfo(i uint16) *ConstantPoolInfo

func (*Annotation) TypeString added in v1.1.0 

func (a *Annotation) TypeString() string

type AttributeInfo 

type AttributeInfo struct {
	NameIndex uint16
	Length    uint32
	Info      []byte

	Annotations []*Annotation
	// contains filtered or unexported fields
}

func NewAttributeInfo 

func NewAttributeInfo(r io.Reader, buf []byte, cp []*ConstantPoolInfo) (*AttributeInfo, []byte, error)

func (*AttributeInfo) ConstantPoolInfo 

func (a *AttributeInfo) ConstantPoolInfo(i uint16) *ConstantPoolInfo

func (*AttributeInfo) NameString 

func (i *AttributeInfo) NameString() string

func (*AttributeInfo) String 

func (i *AttributeInfo) String() string

type ClassAccessFlags 

type ClassAccessFlags uint16
const (
	CLASS_ACC_PUBLIC     ClassAccessFlags = 0x0001
	CLASS_ACC_FINAL      ClassAccessFlags = 0x0010
	CLASS_ACC_SUPER      ClassAccessFlags = 0x0020
	CLASS_ACC_INTERFACE  ClassAccessFlags = 0x0200
	CLASS_ACC_ABSTRACT   ClassAccessFlags = 0x0400
	CLASS_ACC_SYNTHETIC  ClassAccessFlags = 0x1000
	CLASS_ACC_ANNOTATION ClassAccessFlags = 0x2000
	CLASS_ACC_ENUM       ClassAccessFlags = 0x4000
)

type ClassFile 

type ClassFile struct {
	Magic uint32

	MinorVersion uint16
	MajorVersion uint16

	ConstantPoolCount uint16
	ConstantPool      []*ConstantPoolInfo

	AccessFlags ClassAccessFlags
	ThisClass   uint16
	SuperClass  uint16

	InterfaceCount uint16
	Interfaces     []uint16

	FieldsCount uint16
	Fields      []*FieldInfo

	MethodsCount uint16
	Methods      []*MethodInfo

	AttributesCount uint16
	Attributes      []*AttributeInfo
}

func NewClassFile 

func NewClassFile(r io.Reader) (*ClassFile, error)

func NewClassFileFromPath 

func NewClassFileFromPath(path string) (*ClassFile, error)

func (*ClassFile) AccessFlagsString 

func (cf *ClassFile) AccessFlagsString() string

func (*ClassFile) HasField 

func (cf *ClassFile) HasField() bool

func (*ClassFile) HasInterfaces 

func (cf *ClassFile) HasInterfaces() bool

func (*ClassFile) HasMethod 

func (cf *ClassFile) HasMethod() bool

func (*ClassFile) InterfaceStrings 

func (cf *ClassFile) InterfaceStrings() []string

func (*ClassFile) IsAbstract 

func (cf *ClassFile) IsAbstract() bool

是抽象类或者接口

func (*ClassFile) IsAnnotation 

func (cf *ClassFile) IsAnnotation() bool

是 @interface

func (*ClassFile) IsClass 

func (cf *ClassFile) IsClass() bool

是 class 但不是 enum

func (*ClassFile) IsEnum 

func (cf *ClassFile) IsEnum() bool

是 enum

func (*ClassFile) IsFinal 

func (cf *ClassFile) IsFinal() bool

如果为 true 则表明一定为类或 enum，不是接口、@interface 或者抽象类

func (*ClassFile) IsInterface 

func (cf *ClassFile) IsInterface() bool

是 interface 但不是 @interface

func (*ClassFile) IsPublic 

func (cf *ClassFile) IsPublic() bool

如果为 true 则表示是 public 的类、interface、@interface 或 enum；否则为 package 的

func (*ClassFile) IsSynthetic 

func (cf *ClassFile) IsSynthetic() bool

是编译器生成的类或者接口

func (*ClassFile) String 

func (cf *ClassFile) String() string

func (*ClassFile) SuperClassString 

func (cf *ClassFile) SuperClassString() string

func (*ClassFile) ThisClassString 

func (cf *ClassFile) ThisClassString() string

type ConstantClassInfo 

type ConstantClassInfo ConstantPoolInfo

CONSTANT_Class 7

func (*ConstantClassInfo) NameIndex 

func (i *ConstantClassInfo) NameIndex() uint16

func (*ConstantClassInfo) String 

func (i *ConstantClassInfo) String() string

type ConstantDoubleInfo 

type ConstantDoubleInfo ConstantPoolInfo

CONSTANT_Double 6

func (*ConstantDoubleInfo) Double 

func (i *ConstantDoubleInfo) Double() float64

func (*ConstantDoubleInfo) String 

func (i *ConstantDoubleInfo) String() string

type ConstantFieldrefInfo 

type ConstantFieldrefInfo ConstantPoolInfo

CONSTANT_Fieldref 9

func (*ConstantFieldrefInfo) ClassIndex 

func (i *ConstantFieldrefInfo) ClassIndex() uint16

func (*ConstantFieldrefInfo) NameAndTypeIndex 

func (i *ConstantFieldrefInfo) NameAndTypeIndex() uint16

func (*ConstantFieldrefInfo) String 

func (i *ConstantFieldrefInfo) String() string

type ConstantFloatInfo 

type ConstantFloatInfo ConstantPoolInfo

CONSTANT_Float 4

func (*ConstantFloatInfo) Float 

func (i *ConstantFloatInfo) Float() float32

func (*ConstantFloatInfo) String 

func (i *ConstantFloatInfo) String() string

type ConstantIntegerInfo 

type ConstantIntegerInfo ConstantPoolInfo

CONSTANT_Integer 3

func (*ConstantIntegerInfo) Integer 

func (i *ConstantIntegerInfo) Integer() int32

func (*ConstantIntegerInfo) String 

func (i *ConstantIntegerInfo) String() string

type ConstantInterfaceMethodrefInfo 

type ConstantInterfaceMethodrefInfo ConstantPoolInfo

CONSTANT_InterfaceMethodref 11

func (*ConstantInterfaceMethodrefInfo) ClassIndex 

func (i *ConstantInterfaceMethodrefInfo) ClassIndex() uint16

func (*ConstantInterfaceMethodrefInfo) NameAndTypeIndex 

func (i *ConstantInterfaceMethodrefInfo) NameAndTypeIndex() uint16

func (*ConstantInterfaceMethodrefInfo) String 

func (i *ConstantInterfaceMethodrefInfo) String() string

type ConstantInvokeDynamicInfo 

type ConstantInvokeDynamicInfo ConstantPoolInfo

CONSTANT_InvokeDynamic 18

func (*ConstantInvokeDynamicInfo) BootstrapMethodAttrIndex 

func (i *ConstantInvokeDynamicInfo) BootstrapMethodAttrIndex() uint16

func (*ConstantInvokeDynamicInfo) NameAndTypeIndex 

func (i *ConstantInvokeDynamicInfo) NameAndTypeIndex() uint16

func (*ConstantInvokeDynamicInfo) String 

func (i *ConstantInvokeDynamicInfo) String() string

type ConstantLongInfo 

type ConstantLongInfo ConstantPoolInfo

CONSTANT_Long 5

func (*ConstantLongInfo) Long 

func (i *ConstantLongInfo) Long() int64

func (*ConstantLongInfo) String 

func (i *ConstantLongInfo) String() string

type ConstantMethodHandleInfo 

type ConstantMethodHandleInfo ConstantPoolInfo

CONSTANT_MethodHandle 15

func (*ConstantMethodHandleInfo) ReferenceIndex 

func (i *ConstantMethodHandleInfo) ReferenceIndex() uint16

func (*ConstantMethodHandleInfo) ReferenceKind 

func (i *ConstantMethodHandleInfo) ReferenceKind() uint8

func (*ConstantMethodHandleInfo) String 

func (i *ConstantMethodHandleInfo) String() string

type ConstantMethodTypeInfo 

type ConstantMethodTypeInfo ConstantPoolInfo

CONSTANT_MethodType 16

func (*ConstantMethodTypeInfo) DescriptorIndex 

func (i *ConstantMethodTypeInfo) DescriptorIndex() uint16

func (*ConstantMethodTypeInfo) String 

func (i *ConstantMethodTypeInfo) String() string

type ConstantMethodrefInfo 

type ConstantMethodrefInfo ConstantPoolInfo

CONSTANT_Methodref 10

func (*ConstantMethodrefInfo) ClassIndex 

func (i *ConstantMethodrefInfo) ClassIndex() uint16

func (*ConstantMethodrefInfo) NameAndTypeIndex 

func (i *ConstantMethodrefInfo) NameAndTypeIndex() uint16

func (*ConstantMethodrefInfo) String 

func (i *ConstantMethodrefInfo) String() string

type ConstantNameAndTypeInfo 

type ConstantNameAndTypeInfo ConstantPoolInfo

CONSTANT_NameAndType 12

func (*ConstantNameAndTypeInfo) DescriptorIndex 

func (i *ConstantNameAndTypeInfo) DescriptorIndex() uint16

func (*ConstantNameAndTypeInfo) NameIndex 

func (i *ConstantNameAndTypeInfo) NameIndex() uint16

func (*ConstantNameAndTypeInfo) String 

func (i *ConstantNameAndTypeInfo) String() string

type ConstantPoolInfo 

type ConstantPoolInfo struct {
	Tag  uint8
	Info []byte
}

func NewConstantPoolInfo 

func NewConstantPoolInfo(r io.Reader, buf []byte) (*ConstantPoolInfo, []byte, error)

func (*ConstantPoolInfo) String 

func (i *ConstantPoolInfo) String() string

type ConstantStringInfo 

type ConstantStringInfo ConstantPoolInfo

CONSTANT_String 8

func (*ConstantStringInfo) String 

func (i *ConstantStringInfo) String() string

func (*ConstantStringInfo) StringIndex 

func (i *ConstantStringInfo) StringIndex() uint16

type ConstantUtf8Info 

type ConstantUtf8Info ConstantPoolInfo

CONSTANT_Utf8 1

func (*ConstantUtf8Info) Bytes 

func (i *ConstantUtf8Info) Bytes() []byte

func (*ConstantUtf8Info) Length 

func (i *ConstantUtf8Info) Length() uint16

func (*ConstantUtf8Info) String 

func (i *ConstantUtf8Info) String() string

func (*ConstantUtf8Info) Utf8 

func (info *ConstantUtf8Info) Utf8() string

type ElementValue 

type ElementValue struct {
	Tag               string
	Info              []byte
	ConstantPoolIndex uint16
	// contains filtered or unexported fields
}

func NewElementValue 

func NewElementValue(r io.Reader, buf []byte, cp []*ConstantPoolInfo) (*ElementValue, []byte, error)

func (*ElementValue) ConstantPoolInfo 

func (ev *ElementValue) ConstantPoolInfo(i uint16) *ConstantPoolInfo

type ElementValuePair 

type ElementValuePair struct {
	ElementNameIndex uint16
	Value            *ElementValue
	// contains filtered or unexported fields
}

func NewElementValuePair 

func NewElementValuePair(r io.Reader, buf []byte, cp []*ConstantPoolInfo) (*ElementValuePair, []byte, error)

func (*ElementValuePair) ConstantPoolInfo 

func (evp *ElementValuePair) ConstantPoolInfo(i uint16) *ConstantPoolInfo

func (*ElementValuePair) ElementNameString added in v1.2.0 

func (evp *ElementValuePair) ElementNameString() string

type FieldAccessFlags 

type FieldAccessFlags uint16
const (
	FIELD_ACC_PUBLIC    FieldAccessFlags = 0x0001
	FIELD_ACC_PRIVATE   FieldAccessFlags = 0x0002
	FIELD_ACC_PROTECTED FieldAccessFlags = 0x0004
	FIELD_ACC_STATIC    FieldAccessFlags = 0x0008
	FIELD_ACC_FINAL     FieldAccessFlags = 0x0010
	FIELD_ACC_VOLATILE  FieldAccessFlags = 0x0040
	FIELD_ACC_TRANSIENT FieldAccessFlags = 0x0080
	FIELD_ACC_SYNTHETIC FieldAccessFlags = 0x1000
	FIELD_ACC_ENUM      FieldAccessFlags = 0x4000
)

type FieldInfo 

type FieldInfo struct {
	AccessFlags     FieldAccessFlags
	NameIndex       uint16
	DescriptorIndex uint16
	AttributesCount uint16
	Attributes      []*AttributeInfo
	// contains filtered or unexported fields
}

func NewFieldInfo 

func NewFieldInfo(r io.Reader, buf []byte, cp []*ConstantPoolInfo) (*FieldInfo, []byte, error)

func (*FieldInfo) AccessFlagsString 

func (i *FieldInfo) AccessFlagsString() string

func (*FieldInfo) DescriptorString 

func (i *FieldInfo) DescriptorString() string

func (*FieldInfo) NameString 

func (i *FieldInfo) NameString() string

func (*FieldInfo) String 

func (i *FieldInfo) String() string

type MethodAccessFlags 

type MethodAccessFlags uint16
const (
	METHOD_ACC_PUBLIC       MethodAccessFlags = 0x0001
	METHOD_ACC_PRIVATE      MethodAccessFlags = 0x0002
	METHOD_ACC_PROTECTED    MethodAccessFlags = 0x0004
	METHOD_ACC_STATIC       MethodAccessFlags = 0x0008
	METHOD_ACC_FINAL        MethodAccessFlags = 0x0010
	METHOD_ACC_SYNCHRONIZED MethodAccessFlags = 0x0020
	METHOD_ACC_BRIDGE       MethodAccessFlags = 0x0040
	METHOD_ACC_VARARGS      MethodAccessFlags = 0x0080
	METHOD_ACC_NATIVE       MethodAccessFlags = 0x0100
	METHOD_ACC_ABSTRACT     MethodAccessFlags = 0x0400
	METHOD_ACC_STRICT       MethodAccessFlags = 0x0800
	METHOD_ACC_SYNTHETIC    MethodAccessFlags = 0x1000
)

type MethodInfo 

type MethodInfo struct {
	AccessFlags     MethodAccessFlags
	NameIndex       uint16
	DescriptorIndex uint16
	AttributesCount uint16
	Attributes      []*AttributeInfo
	// contains filtered or unexported fields
}

func NewMethodInfo 

func NewMethodInfo(r io.Reader, buf []byte, cp []*ConstantPoolInfo) (*MethodInfo, []byte, error)

func (*MethodInfo) AccessFlagsString 

func (i *MethodInfo) AccessFlagsString() string

func (*MethodInfo) DescriptorString 

func (i *MethodInfo) DescriptorString() string

func (*MethodInfo) NameString 

func (i *MethodInfo) NameString() string

func (*MethodInfo) String 

func (i *MethodInfo) String() string

Source Files

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Directories

Path Synopsis
cmd
jprint

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