Package org.apache.bcel.generic

Class FieldGen

java.lang.Object

org.apache.bcel.classfile.AccessFlags

org.apache.bcel.generic.FieldGenOrMethodGen

org.apache.bcel.generic.FieldGen

All Implemented Interfaces:

Cloneable, NamedAndTyped

public class FieldGen
extends FieldGenOrMethodGen

Template class for building up a field. The only extraordinary thing one can do is to add a constant value attribute to a field (which must of course be compatible with to the declared type).

See Also:

• Field

Field Summary

Fields inherited from class org.apache.bcel.generic.FieldGenOrMethodGen

cp, name, type

Fields inherited from class org.apache.bcel.classfile.AccessFlags

access_flags

Constructor Summary

Constructors

Constructor	Description
FieldGen(int access_flags, Type type, String name, ConstantPoolGen cp)	Declare a field.
FieldGen(Field field, ConstantPoolGen cp)	Instantiate from existing field.

Method Summary

Modifier and Type	Method	Description
void	addObserver(FieldObserver o)	Add observer for this object.
void	cancelInitValue()	Remove any initial value.
FieldGen	copy(ConstantPoolGen cp)
boolean	equals(Object obj)	Return value as defined by given BCELComparator strategy.
static BCELComparator	getComparator()
Field	getField()	Get field object after having set up all necessary values.
String	getInitValue()
String	getSignature()
int	hashCode()	Return value as defined by given BCELComparator strategy.
void	removeObserver(FieldObserver o)	Remove observer for this object.
static void	setComparator(BCELComparator comparator)
void	setInitValue(boolean b)
void	setInitValue(byte b)
void	setInitValue(char c)
void	setInitValue(double d)
void	setInitValue(float f)
void	setInitValue(int i)
void	setInitValue(long l)
void	setInitValue(short s)
void	setInitValue(String str)	Set (optional) initial value of field, otherwise it will be set to null/0/false by the JVM automatically.
final String	toString()	Return string representation close to declaration format, `public static final short MAX = 100', e.g..
void	update()	Call notify() method on all observers.

Methods inherited from class org.apache.bcel.generic.FieldGenOrMethodGen

addAnnotationEntry, addAttribute, clone, getAnnotationEntries, getAttributes, getConstantPool, getName, getType, removeAnnotationEntries, removeAnnotationEntry, removeAttribute, removeAttributes, setConstantPool, setName, setType

Methods inherited from class org.apache.bcel.classfile.AccessFlags

getAccessFlags, getModifiers, isAbstract, isAbstract, isAnnotation, isAnnotation, isEnum, isEnum, isFinal, isFinal, isInterface, isInterface, isNative, isNative, isPrivate, isPrivate, isProtected, isProtected, isPublic, isPublic, isStatic, isStatic, isStrictfp, isStrictfp, isSynchronized, isSynchronized, isSynthetic, isSynthetic, isTransient, isTransient, isVarArgs, isVarArgs, isVolatile, isVolatile, setAccessFlags, setModifiers

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Details

FieldGen

public FieldGen(int access_flags,
 Type type,
 String name,
 ConstantPoolGen cp)

Declare a field. If it is static (isStatic() == true) and has a basic type like int or String it may have an initial value associated with it as defined by setInitValue().

Parameters:

access_flags - access qualifiers

type - field type

name - field name

cp - constant pool

FieldGen

public FieldGen(Field field,
 ConstantPoolGen cp)

Instantiate from existing field.

Parameters:

field - Field object

cp - constant pool (must contain the same entries as the field's constant pool)

Method Details

setInitValue

public void setInitValue(String str)

Set (optional) initial value of field, otherwise it will be set to null/0/false by the JVM automatically.

setInitValue

public void setInitValue(long l)

setInitValue

public void setInitValue(int i)

setInitValue

public void setInitValue(short s)

setInitValue

public void setInitValue(char c)

setInitValue

public void setInitValue(byte b)

setInitValue

public void setInitValue(boolean b)

setInitValue

public void setInitValue(float f)

setInitValue

public void setInitValue(double d)

cancelInitValue

public void cancelInitValue()

Remove any initial value.

getField

public Field getField()

Get field object after having set up all necessary values.

getSignature

public String getSignature()

Specified by:

getSignature in class FieldGenOrMethodGen

Returns:

signature of method/field.

addObserver

public void addObserver(FieldObserver o)

Add observer for this object.

removeObserver

public void removeObserver(FieldObserver o)

Remove observer for this object.

update

public void update()

Call notify() method on all observers. This method is not called automatically whenever the state has changed, but has to be called by the user after he has finished editing the object.

getInitValue

public String getInitValue()

toString

public final String toString()

Return string representation close to declaration format, `public static final short MAX = 100', e.g..

Overrides:

toString in class Object

Returns:

String representation of field

copy

public FieldGen copy(ConstantPoolGen cp)

Returns:

deep copy of this field

getComparator

public static BCELComparator getComparator()

Returns:

Comparison strategy object

setComparator

public static void setComparator(BCELComparator comparator)

Parameters:

comparator - Comparison strategy object

equals

public boolean equals(Object obj)

Return value as defined by given BCELComparator strategy. By default two FieldGen objects are said to be equal when their names and signatures are equal.

Overrides:

equals in class Object

See Also:

• Object.equals(java.lang.Object)

hashCode

public int hashCode()

Return value as defined by given BCELComparator strategy. By default return the hashcode of the field's name XOR signature.

Overrides:

hashCode in class Object

See Also:

• Object.hashCode()