edu.wisc.cs.java
Class Accessible

java.lang.Object
  |
  +--edu.wisc.cs.java.Accessible

Direct Known Subclasses:

ClassFile, FieldInfo, MethodInfo

public abstract class Accessible

extends java.lang.Object

This is the superclass of the ClassFile, MethodInfo, and FieldInfo classes. It provides an interface for dealing which objects which have associated access flags. For more information on the access flags provided as constants in this class, see the Java Language and Java Virtual Machine specifications. Note that this is an abstract class, and as such it is not instantiable.

Field Summary

static int	ACC_ABSTRACT Set by all interfaces and some classes to indicate that the type is abstract.
static int	ACC_FINAL Indicates the final property.
static int	ACC_INTERFACE Indicates that the type is an interface.
static int	ACC_NATIVE Indicates that this methods is native.
static int	ACC_PRIVATE Indicates private access.
static int	ACC_PROTECTED Indicates protected access.
static int	ACC_PUBLIC Used to indicate public access.
static int	ACC_STATIC Indicates that the member is static.
static int	ACC_SUPER Used by classes and interfaces to indicate that the INVOKESPECIAL semantics should be used.
static int	ACC_SYNCHRONIZED Used by methods to indicate synchronized semantics are to be used.
static int	ACC_TRANSIENT Used by fields in classes to indicate the transient property.
static int	ACC_VOLATILE Used by fields in classes to indicate the volatile property.
protected int	access_flags The bit field representing the flags that are set.

Constructor Summary

protected

Accessible() Constructs a new Accessable object with no flags set.

Method Summary

boolean	getFlag(int flag) Queries the status of an access flag.
void	setFlag(int flags) Sets one or more flags for this object.
void	unSetFlag(int flags) Unsets one or more flags for this object.

Methods inherited from class java.lang.Object

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

Field Detail

ACC_PUBLIC

public static final int ACC_PUBLIC

Used to indicate public access. Set by classes, interfaces, fields, and methods. Note that all interface methods must set this flag.

ACC_PRIVATE

public static final int ACC_PRIVATE

Indicates private access. Set by fields and methods.

ACC_PROTECTED

public static final int ACC_PROTECTED

Indicates protected access. Set by fields and methods.

ACC_STATIC

public static final int ACC_STATIC

Indicates that the member is static. Set by fields and methods.

ACC_FINAL

public static final int ACC_FINAL

Indicates the final property. Set by classes, fields, and methods.

ACC_SYNCHRONIZED

public static final int ACC_SYNCHRONIZED

Used by methods to indicate synchronized semantics are to be used.

ACC_SUPER

public static final int ACC_SUPER

Used by classes and interfaces to indicate that the INVOKESPECIAL semantics should be used. All current compilers should set this flag.

ACC_VOLATILE

public static final int ACC_VOLATILE

Used by fields in classes to indicate the volatile property.

ACC_TRANSIENT

public static final int ACC_TRANSIENT

Used by fields in classes to indicate the transient property.

ACC_NATIVE

public static final int ACC_NATIVE

Indicates that this methods is native.

ACC_INTERFACE

public static final int ACC_INTERFACE

Indicates that the type is an interface.

ACC_ABSTRACT

public static final int ACC_ABSTRACT

Set by all interfaces and some classes to indicate that the type is abstract. Also used by methods in abstracted classes and all interface methods.

access_flags

protected int access_flags

The bit field representing the flags that are set.

Constructor Detail

Accessible

protected Accessible()

Constructs a new Accessable object with no flags set. This is intended as a simple initialization step to be called from the constructors of sub-classes.

Method Detail

getFlag

public boolean getFlag(int flag)

Queries the status of an access flag. The flag is expected to be one of the constants defined for this class.

Parameters:

flag - an integer encoding the flag being queried.

Returns:

true if the requested flag is set, false otherwise.

setFlag

public void setFlag(int flags)

Sets one or more flags for this object. The flags are expected to be one of the constants defined for this class, or a set of those constants combined with bitwise or.

Parameters:

flags - an integer encoding the flag or flags being set.

unSetFlag

public void unSetFlag(int flags)

Unsets one or more flags for this object. The flags are expected to be one of the constants defined for this class, or a set of those constants combined with bitwise or.

Parameters:

flags - an integer encoding the flag or flags being unset.