Package com.yworks.yguard.obf.classfile

Class AttrInfo

java.lang.Object

com.yworks.yguard.obf.classfile.AttrInfo

All Implemented Interfaces:

ClassConstants

Direct Known Subclasses:

AnnotationDefaultAttrInfo, BootstrapMethodsAttrInfo, CodeAttrInfo, ConstantValueAttrInfo, DeprecatedAttrInfo, EnclosingMethodAttrInfo, ExceptionsAttrInfo, InnerClassesAttrInfo, LineNumberTableAttrInfo, LocalVariableTableAttrInfo, LocalVariableTypeTableAttrInfo, MethodParametersAttrInfo, ModuleAttrInfo, ModuleMainClassAttrInfo, ModulePackagesAttrInfo, NestHostAttrInfo, NestMembersAttrInfo, PermittedSubclassesAttrInfo, RecordAttrInfo, RuntimeVisibleAnnotationsAttrInfo, RuntimeVisibleParameterAnnotationsAttrInfo, RuntimeVisibleTypeAnnotationsAttrInfo, SignatureAttrInfo, SourceFileAttrInfo, StackMapTableAttrInfo, SyntheticAttrInfo

public class AttrInfo
extends java.lang.Object
implements ClassConstants

Representation of an attribute. Specific attributes have their representations sub-classed from this.

Field Summary

Fields

Modifier and Type	Field	Description
static int	CONSTANT_FIELD_SIZE	The constant CONSTANT_FIELD_SIZE.
protected ClassFile	owner	The Owner.
protected int	u4attrLength	The length of the attribute in bytes.

Fields inherited from interface com.yworks.yguard.obf.classfile.ClassConstants

ACC_ABSTRACT, ACC_ANNOTATION, ACC_BRIDGE, ACC_ENUM, ACC_FINAL, ACC_INTERFACE, ACC_NATIVE, ACC_PRIVATE, ACC_PROTECTED, ACC_PUBLIC, ACC_STATIC, ACC_SUPER, ACC_SYNCHRONIZED, ACC_SYNTHETIC, ACC_TRANSIENT, ACC_VARARGS, ACC_VOLATILE, ATTR_AnnotationDefault, ATTR_BootstrapMethods, ATTR_Bridge, ATTR_Code, ATTR_ConstantValue, ATTR_Deprecated, ATTR_EnclosingMethod, ATTR_Enum, ATTR_Exceptions, ATTR_InnerClasses, ATTR_LineNumberTable, ATTR_LocalVariableTable, ATTR_LocalVariableTypeTable, ATTR_MethodParameters, ATTR_Module, ATTR_ModuleMainClass, ATTR_ModulePackages, ATTR_NestHost, ATTR_NestMembers, ATTR_PermittedSubclasses, ATTR_Record, ATTR_RuntimeInvisibleAnnotations, ATTR_RuntimeInvisibleParameterAnnotations, ATTR_RuntimeInvisibleTypeAnnotations, ATTR_RuntimeVisibleAnnotations, ATTR_RuntimeVisibleParameterAnnotations, ATTR_RuntimeVisibleTypeAnnotations, ATTR_Signature, ATTR_SourceDebug, ATTR_SourceDebugExtension, ATTR_SourceFile, ATTR_StackMapTable, ATTR_Synthetic, ATTR_Unknown, ATTR_Varargs, CONSTANT_Class, CONSTANT_Double, CONSTANT_Dynamic, CONSTANT_Fieldref, CONSTANT_Float, CONSTANT_Integer, CONSTANT_InterfaceMethodref, CONSTANT_InvokeDynamic, CONSTANT_Long, CONSTANT_MethodHandle, CONSTANT_Methodref, CONSTANT_MethodType, CONSTANT_Module, CONSTANT_NameAndType, CONSTANT_Package, CONSTANT_String, CONSTANT_Utf8, KNOWN_ATTRS, MAGIC, MAJOR_VERSION, MINOR_VERSION_MAX, REF_getField, REF_getStatic, REF_invokeInterface, REF_invokeSpecial, REF_invokeStatic, REF_invokeVirtual, REF_newInvokeSpecial, REF_putField, REF_putStatic, REQUIRED_ATTRS

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AttrInfo(ClassFile cf, int attrNameIndex, int attrLength)	Instantiates a new Attr info.

Method Summary

Modifier and Type	Method	Description
static AttrInfo	create(java.io.DataInput din, ClassFile cf)	Create a new AttrInfo from the data passed.
protected int	getAttrInfoLength()	Return the length of the attribute in bytes; over-ride this in sub-classes.
protected java.lang.String	getAttrName()	Return the String name of the attribute; over-ride this in sub-classes.
protected int	getAttrNameIndex()	Get attr name index int.
protected void	markUtf8Refs(ConstantPool pool)	Check for Utf8 references to constant pool and mark them.
protected void	markUtf8RefsInInfo(ConstantPool pool)	Check for Utf8 references in the 'info' data to the constant pool and mark them; over-ride this in sub-classes.
protected void	readInfo(java.io.DataInput din)	Read the data following the header; over-ride this in sub-classes.
java.lang.String	toString()
protected void	trimAttrsExcept(java.lang.String[] keepAttrs)	Trim attributes from the classfile except those in the String[].
void	write(java.io.DataOutput dout)	Export the representation to a DataOutput stream.
void	writeInfo(java.io.DataOutput dout)	Export data following the header to a DataOutput stream; over-ride this in sub-classes.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

CONSTANT_FIELD_SIZE

public static final int CONSTANT_FIELD_SIZE

The constant CONSTANT_FIELD_SIZE.

See Also:

Constant Field Values

u4attrLength

protected int u4attrLength

The length of the attribute in bytes.

owner

protected ClassFile owner

The Owner.

Constructor Detail

AttrInfo

protected AttrInfo(ClassFile cf,
                   int attrNameIndex,
                   int attrLength)

Instantiates a new Attr info.

Parameters:

cf - the cf

attrNameIndex - the attr name index

attrLength - the attr length

Method Detail

create

public static AttrInfo create(java.io.DataInput din,
                              ClassFile cf)
                       throws java.io.IOException

Create a new AttrInfo from the data passed.

Parameters:

din - the din

cf - the cf

Returns:

the attr info

Throws:

java.io.IOException - if class file is corrupt or incomplete

getAttrNameIndex

protected int getAttrNameIndex()

Get attr name index int.

Returns:

the int

getAttrInfoLength

protected int getAttrInfoLength()

Return the length of the attribute in bytes; over-ride this in sub-classes.

Returns:

the attr info length

getAttrName

protected java.lang.String getAttrName()

Return the String name of the attribute; over-ride this in sub-classes.

Returns:

the attr name

trimAttrsExcept

protected void trimAttrsExcept(java.lang.String[] keepAttrs)

Trim attributes from the classfile except those in the String[].

Parameters:

keepAttrs - the keep attrs

markUtf8Refs

protected void markUtf8Refs(ConstantPool pool)

Check for Utf8 references to constant pool and mark them.

Parameters:

pool - the pool

markUtf8RefsInInfo

protected void markUtf8RefsInInfo(ConstantPool pool)

Check for Utf8 references in the 'info' data to the constant pool and mark them; over-ride this in sub-classes.

Parameters:

pool - the pool

readInfo

protected void readInfo(java.io.DataInput din)
                 throws java.io.IOException

Read the data following the header; over-ride this in sub-classes.

Parameters:

din - the din

Throws:

java.io.IOException - the io exception

write

public final void write(java.io.DataOutput dout)
                 throws java.io.IOException

Export the representation to a DataOutput stream.

Parameters:

dout - the dout

Throws:

java.io.IOException - the io exception

writeInfo

public void writeInfo(java.io.DataOutput dout)
               throws java.io.IOException

Export data following the header to a DataOutput stream; over-ride this in sub-classes.

Parameters:

dout - the dout

Throws:

java.io.IOException - the io exception

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object