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 and Description
    `Repository()`

  - ### Method Summary

    All Methods Static Methods Concrete Methods
    Modifier and Type | Method and 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(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)` Tries to find class source using the internal repository instance.
    `static JavaClass` | `lookupClass(String class_name)` Lookups 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)` Removes given class from repository.
    `static void` | `removeClass(String clazz)` Removes class with given (fully qualified) name 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 Detail

    - #### Repository

          public Repository()

  - ### Method Detail

    - #### getRepository

          public static Repository getRepository()

      Returns:
        currently used repository instance

    - #### setRepository

          public static void setRepository(Repository rep)

      Sets repository instance to be used for class loading

    - #### lookupClass

          public static JavaClass lookupClass(String class_name)
                                       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

    - #### 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`

    - #### 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()

      Clears the repository.

    - #### 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

    - #### removeClass

          public static void removeClass(String clazz)

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

    - #### removeClass

          public static void removeClass(JavaClass clazz)

      Removes 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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