Package org.apache.bcel

Class Repository

java.lang.Object

org.apache.bcel.Repository

public abstract class Repository
extends Object

The repository maintains informations about class interdependencies, e.g., whether a class is a sub-class of another. Delegates actual class loading to SyntheticRepository with current class path by default.

See Also:

• Repository
• SyntheticRepository

Constructor Summary

Constructors

Constructor	Description
Repository()

Method Summary

Modifier and Type	Method	Description
static JavaClass	addClass(JavaClass clazz)	Adds clazz to repository if there isn't an equally named class already in there.
static void	clearCache()	Clears the repository.
static JavaClass[]	getInterfaces(String className)
static JavaClass[]	getInterfaces(JavaClass clazz)
static Repository	getRepository()
static JavaClass[]	getSuperClasses(String className)
static JavaClass[]	getSuperClasses(JavaClass clazz)
static boolean	implementationOf(String clazz, String inter)
static boolean	implementationOf(String clazz, JavaClass inter)
static boolean	implementationOf(JavaClass clazz, String inter)
static boolean	implementationOf(JavaClass clazz, JavaClass inter)
static boolean	instanceOf(String clazz, String superclass)
static boolean	instanceOf(String clazz, JavaClass superclass)
static boolean	instanceOf(JavaClass clazz, String superclass)
static boolean	instanceOf(JavaClass clazz, JavaClass superclass)	Equivalent to runtime "instanceof" operator.
static JavaClass	lookupClass(Class<?> clazz)	Tries to find class source using the internal repository instance.
static JavaClass	lookupClass(String className)	Lookups class somewhere found on your CLASSPATH, or whereever the repository instance looks for it.
static ClassPath.ClassFile	lookupClassFile(String className)
static void	removeClass(String clazz)	Removes class with given (fully qualified) name from repository.
static void	removeClass(JavaClass clazz)	Removes given class from repository.
static void	setRepository(Repository rep)	Sets repository instance to be used for class loading

Methods inherited from class java.lang.Object

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

Constructor Details

Repository

public Repository()

Method Details

addClass

public static JavaClass addClass(JavaClass clazz)

Adds clazz to repository if there isn't an equally named class already in there.

Returns:

old entry in repository

clearCache

public static void clearCache()

Clears the repository.

getInterfaces

public static JavaClass[] getInterfaces(JavaClass clazz)
                                 throws ClassNotFoundException

Returns:

all interfaces implemented by class and its super classes and the interfaces that those interfaces extend, and so on. (Some people call this a transitive hull).

Throws:

ClassNotFoundException - if any of the class's superclasses or superinterfaces can't be found

getInterfaces

public static JavaClass[] getInterfaces(String className)
                                 throws ClassNotFoundException

Returns:

all interfaces implemented by class and its super classes and the interfaces that extend those interfaces, and so on

Throws:

ClassNotFoundException - if the named class can't be found, or if any of its superclasses or superinterfaces can't be found

getRepository

public static Repository getRepository()

Returns:

currently used repository instance

getSuperClasses

public static JavaClass[] getSuperClasses(JavaClass clazz)
                                   throws ClassNotFoundException

Returns:

list of super classes of clazz in ascending order, i.e., Object is always the last element

Throws:

ClassNotFoundException - if any of the superclasses can't be found

getSuperClasses

public static JavaClass[] getSuperClasses(String className)
                                   throws ClassNotFoundException

Returns:

list of super classes of clazz in ascending order, i.e., Object is always the last element.

Throws:

ClassNotFoundException - if the named class or any of its superclasses can't be found

implementationOf

public static boolean implementationOf(JavaClass clazz,
 JavaClass inter)
                                throws ClassNotFoundException

Returns:

true, if clazz is an implementation of interface inter

Throws:

ClassNotFoundException - if any superclasses or superinterfaces of clazz can't be found

implementationOf

public static boolean implementationOf(JavaClass clazz,
 String inter)
                                throws ClassNotFoundException

Returns:

true, if clazz is an implementation of interface inter

Throws:

ClassNotFoundException - if inter or any superclasses or superinterfaces of clazz can't be found

implementationOf

public static boolean implementationOf(String clazz,
 JavaClass inter)
                                throws ClassNotFoundException

Returns:

true, if clazz is an implementation of interface inter

Throws:

ClassNotFoundException - if clazz or any superclasses or superinterfaces of clazz can't be found

implementationOf

public static boolean implementationOf(String clazz,
 String inter)
                                throws ClassNotFoundException

Returns:

true, if clazz is an implementation of interface inter

Throws:

ClassNotFoundException - if clazz, inter, or any superclasses or superinterfaces of clazz can't be found

instanceOf

public static boolean instanceOf(JavaClass clazz,
 JavaClass superclass)
                          throws ClassNotFoundException

Equivalent to runtime "instanceof" operator.

Returns:

true, if clazz is an instance of superclass

Throws:

ClassNotFoundException - if any superclasses or superinterfaces of clazz can't be found

instanceOf

public static boolean instanceOf(JavaClass clazz,
 String superclass)
                          throws ClassNotFoundException

Returns:

true, if clazz is an instance of superclass

Throws:

ClassNotFoundException - if superclass can't be found

instanceOf

public static boolean instanceOf(String clazz,
 JavaClass superclass)
                          throws ClassNotFoundException

Returns:

true, if clazz is an instance of superclass

Throws:

ClassNotFoundException - if clazz can't be found

instanceOf

public static boolean instanceOf(String clazz,
 String superclass)
                          throws ClassNotFoundException

Returns:

true, if clazz is an instance of superclass

Throws:

ClassNotFoundException - if either clazz or superclass can't be found

lookupClass

public static JavaClass lookupClass(Class<?> clazz)
                             throws ClassNotFoundException

Tries to find class source using the internal repository instance.

Returns:

JavaClass object for given runtime class

Throws:

ClassNotFoundException - if the class could not be found or parsed correctly

See Also:

• Class

lookupClass

public static JavaClass lookupClass(String className)
                             throws ClassNotFoundException

Lookups class somewhere found on your CLASSPATH, or whereever the repository instance looks for it.

Returns:

class object for given fully qualified class name

Throws:

ClassNotFoundException - if the class could not be found or parsed correctly

lookupClassFile

public static ClassPath.ClassFile lookupClassFile(String className)

Returns:

class file object for given Java class by looking on the system class path; returns null if the class file can't be found

removeClass

public static void removeClass(JavaClass clazz)

Removes given class from repository.

removeClass

public static void removeClass(String clazz)

Removes class with given (fully qualified) name from repository.

setRepository

public static void setRepository(Repository rep)

Sets repository instance to be used for class loading