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## 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.

Version:
  $Id: Repository.java 386056 2006-03-15 11:31:56Z tcurdt $
See Also:
  `Repository`, `SyntheticRepository`

Constructor Summary
`Repository()`

Method Summary
`static JavaClass` | `addClass(JavaClass clazz)` Add clazz to repository if there isn't an equally named class already in there.
`static void` | `clearCache()` Clear the repository.
`static JavaClass[]` | `getInterfaces(JavaClass clazz)`
`static JavaClass[]` | `getInterfaces(String class_name)`
`static Repository` | `getRepository()`
`static JavaClass[]` | `getSuperClasses(JavaClass clazz)`
`static JavaClass[]` | `getSuperClasses(String class_name)`
`static boolean` | `implementationOf(JavaClass clazz, JavaClass inter)`
`static boolean` | `implementationOf(JavaClass clazz, String inter)`
`static boolean` | `implementationOf(String clazz, JavaClass inter)`
`static boolean` | `implementationOf(String clazz, String inter)`
`static boolean` | `instanceOf(JavaClass clazz, JavaClass super_class)` Equivalent to runtime "instanceof" operator.
`static boolean` | `instanceOf(JavaClass clazz, String super_class)`
`static boolean` | `instanceOf(String clazz, JavaClass super_class)`
`static boolean` | `instanceOf(String clazz, String super_class)`
`static JavaClass` | `lookupClass(Class clazz)` Try to find class source using the internal repository instance.
`static JavaClass` | `lookupClass(String class_name)` Lookup class somewhere found on your CLASSPATH, or whereever the repository instance looks for it.
`static ClassPath.ClassFile` | `lookupClassFile(String class_name)`
`static void` | `removeClass(JavaClass clazz)` Remove given class from repository.
`static void` | `removeClass(String clazz)` Remove class with given (fully qualified) name from repository.
`static void` | `setRepository(Repository rep)` Set 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 Detail

### Repository

    public Repository()

Method Detail

### getRepository

    public static Repository getRepository()

  Returns:
    currently used repository instance

### setRepository

    public static void setRepository(Repository rep)

  Set repository instance to be used for class loading

### lookupClass

    public static JavaClass lookupClass(String class_name)
                                 throws ClassNotFoundException

  Lookup 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

### lookupClass

    public static JavaClass lookupClass(Class clazz)
                                 throws ClassNotFoundException

  Try 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`

### lookupClassFile

    public static ClassPath.ClassFile lookupClassFile(String class_name)

  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

### clearCache

    public static void clearCache()

  Clear the repository.

### addClass

    public static JavaClass addClass(JavaClass clazz)

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

  Returns:
    old entry in repository

### removeClass

    public static void removeClass(String clazz)

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

### removeClass

    public static void removeClass(JavaClass clazz)

  Remove given class from repository.

### 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 class_name)
                                       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

### 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 class_name)
                                     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

### instanceOf

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

  Equivalent to runtime "instanceof" operator.

  Returns:
    true, if clazz is an instance of super_class
  Throws:
    `ClassNotFoundException` - if any superclasses or superinterfaces of clazz can't be found

### instanceOf

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

  Returns:
    true, if clazz is an instance of super_class
  Throws:
    `ClassNotFoundException` - if either clazz or super_class can't be found

### instanceOf

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

  Returns:
    true, if clazz is an instance of super_class
  Throws:
    `ClassNotFoundException` - if super_class can't be found

### instanceOf

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

  Returns:
    true, if clazz is an instance of super_class
  Throws:
    `ClassNotFoundException` - if clazz 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(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

### 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

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