org.apache.bcel.generic

Class ClassGen

java.lang.Object

org.apache.bcel.classfile.AccessFlags

org.apache.bcel.generic.ClassGen

All Implemented Interfaces:

Serializable, Cloneable

public class ClassGen
extends AccessFlags
implements Cloneable

Template class for building up a java class. May be initialized with an existing java class (file).

Version:

$Id: ClassGen.java 386056 2006-03-15 11:31:56Z tcurdt $

Author:

M. Dahm

See Also:

JavaClass, Serialized Form

Field Summary

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

access_flags

Constructor Summary

Constructors

Constructor and Description
ClassGen(JavaClass clazz) Initialize with existing class.
ClassGen(String class_name, String super_class_name, String file_name, int access_flags, String[] interfaces) Convenience constructor to set up some important values initially.
ClassGen(String class_name, String super_class_name, String file_name, int access_flags, String[] interfaces, ConstantPoolGen cp) Convenience constructor to set up some important values initially.

Method Summary

Methods

Modifier and Type	Method and Description
void	addAttribute(Attribute a) Add an attribute to this class.
void	addEmptyConstructor(int access_flags) Convenience method.
void	addField(Field f) Add a field to this class.
void	addInterface(String name) Add an interface to this class, i.e., this class has to implement it.
void	addMethod(Method m) Add a method to this class.
void	addObserver(ClassObserver o) Add observer for this object.
Object	clone()
boolean	containsField(Field f)
Field	containsField(String name)
Method	containsMethod(String name, String signature)
boolean	equals(Object obj) Return value as defined by given BCELComparator strategy.
Attribute[]	getAttributes()
String	getClassName()
int	getClassNameIndex()
static BCELComparator	getComparator()
ConstantPoolGen	getConstantPool()
Field[]	getFields()
String	getFileName()
String[]	getInterfaceNames()
int[]	getInterfaces()
JavaClass	getJavaClass()
int	getMajor()
Method	getMethodAt(int pos)
Method[]	getMethods()
int	getMinor()
String	getSuperclassName()
int	getSuperclassNameIndex()
int	hashCode() Return value as defined by given BCELComparator strategy.
void	removeAttribute(Attribute a) Remove an attribute from this class.
void	removeField(Field f) Remove a field to this class.
void	removeInterface(String name) Remove an interface from this class.
void	removeMethod(Method m) Remove a method from this class.
void	removeObserver(ClassObserver o) Remove observer for this object.
void	replaceField(Field old, Field new_) Replace given field with new one.
void	replaceMethod(Method old, Method new_) Replace given method with new one.
void	setClassName(String name)
void	setClassNameIndex(int class_name_index)
static void	setComparator(BCELComparator comparator)
void	setConstantPool(ConstantPoolGen constant_pool)
void	setMajor(int major) Set major version number of class file, default value is 45 (JDK 1.1)
void	setMethodAt(Method method, int pos)
void	setMethods(Method[] methods)
void	setMinor(int minor) Set minor version number of class file, default value is 3 (JDK 1.1)
void	setSuperclassName(String name)
void	setSuperclassNameIndex(int superclass_name_index)
void	update() Call notify() method on all observers.

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, isVolatile, isVolatile, setAccessFlags, setModifiers

Methods inherited from class java.lang.Object

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

Constructor Detail

ClassGen

public ClassGen(String class_name,
        String super_class_name,
        String file_name,
        int access_flags,
        String[] interfaces,
        ConstantPoolGen cp)

Convenience constructor to set up some important values initially.

Parameters:

class_name - fully qualified class name

super_class_name - fully qualified superclass name

file_name - source file name

access_flags - access qualifiers

interfaces - implemented interfaces

cp - constant pool to use

ClassGen

public ClassGen(String class_name,
        String super_class_name,
        String file_name,
        int access_flags,
        String[] interfaces)

Convenience constructor to set up some important values initially.

Parameters:

class_name - fully qualified class name

super_class_name - fully qualified superclass name

file_name - source file name

access_flags - access qualifiers

interfaces - implemented interfaces

ClassGen

public ClassGen(JavaClass clazz)

Initialize with existing class.

Parameters:

clazz - JavaClass object (e.g. read from file)

Method Detail

getJavaClass

public JavaClass getJavaClass()

Returns:

the (finally) built up Java class object.

addInterface

public void addInterface(String name)

Add an interface to this class, i.e., this class has to implement it.

Parameters:

name - interface to implement (fully qualified class name)

removeInterface

public void removeInterface(String name)

Remove an interface from this class.

Parameters:

name - interface to remove (fully qualified name)

getMajor

public int getMajor()

Returns:

major version number of class file

setMajor

public void setMajor(int major)

Set major version number of class file, default value is 45 (JDK 1.1)

Parameters:

major - major version number

setMinor

public void setMinor(int minor)

Set minor version number of class file, default value is 3 (JDK 1.1)

Parameters:

minor - minor version number

getMinor

public int getMinor()

Returns:

minor version number of class file

addAttribute

public void addAttribute(Attribute a)

Add an attribute to this class.

Parameters:

a - attribute to add

addMethod

public void addMethod(Method m)

Add a method to this class.

Parameters:

m - method to add

addEmptyConstructor

public void addEmptyConstructor(int access_flags)

Convenience method. Add an empty constructor to this class that does nothing but calling super().

Parameters:

access_flags - rights for constructor

addField

public void addField(Field f)

Add a field to this class.

Parameters:

f - field to add

containsField

public boolean containsField(Field f)

containsField

public Field containsField(String name)

Returns:

field object with given name, or null

containsMethod

public Method containsMethod(String name,
                    String signature)

Returns:

method object with given name and signature, or null

removeAttribute

public void removeAttribute(Attribute a)

Remove an attribute from this class.

Parameters:

a - attribute to remove

removeMethod

public void removeMethod(Method m)

Remove a method from this class.

Parameters:

m - method to remove

replaceMethod

public void replaceMethod(Method old,
                 Method new_)

Replace given method with new one. If the old one does not exist add the new_ method to the class anyway.

replaceField

public void replaceField(Field old,
                Field new_)

Replace given field with new one. If the old one does not exist add the new_ field to the class anyway.

removeField

public void removeField(Field f)

Remove a field to this class.

Parameters:

f - field to remove

getClassName

public String getClassName()

getSuperclassName

public String getSuperclassName()

getFileName

public String getFileName()

setClassName

public void setClassName(String name)

setSuperclassName

public void setSuperclassName(String name)

getMethods

public Method[] getMethods()

setMethods

public void setMethods(Method[] methods)

setMethodAt

public void setMethodAt(Method method,
               int pos)

getMethodAt

public Method getMethodAt(int pos)

getInterfaceNames

public String[] getInterfaceNames()

getInterfaces

public int[] getInterfaces()

getFields

public Field[] getFields()

getAttributes

public Attribute[] getAttributes()

getConstantPool

public ConstantPoolGen getConstantPool()

setConstantPool

public void setConstantPool(ConstantPoolGen constant_pool)

setClassNameIndex

public void setClassNameIndex(int class_name_index)

setSuperclassNameIndex

public void setSuperclassNameIndex(int superclass_name_index)

getSuperclassNameIndex

public int getSuperclassNameIndex()

getClassNameIndex

public int getClassNameIndex()

addObserver

public void addObserver(ClassObserver o)

Add observer for this object.

removeObserver

public void removeObserver(ClassObserver 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.

clone

public Object clone()

Overrides:

clone in class Object

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 ClassGen objects are said to be equal when their class names 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 class name.

Overrides:

hashCode in class Object

See Also:

Object.hashCode()