Examples of javassist.CtClass.detach()

javassist.CtClass.detach()
Removes this CtClass object from the ClassPool. After this method is called, any method cannot be called on the removed CtClass object.
If get() in ClassPool is called with the name of the removed method, the ClassPool will read the class file again and constructs another CtClass object representing the same class.

    
    ClassPool pool = ClassPool.getDefault();
    // Class have to have no package name for the JPQL to work, not clear why, presumably I missed a mapping somewhere
    // but it doesn't matter because this class is internal to the process space anyway
    CtClass cc = pool.makeClass("TemplateClass" + nStep);
    cc.detach();
    // Remove all fields:
    for (CtField toRemove: cc.getFields()) {
      cc.removeField(toRemove);
    }

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        for (CtMethod m : cc.getDeclaredMethods()) {
          m.insertBefore("org.stagemonitor.requestmonitor.profiler.Profiler.start();");
          m.insertAfter("org.stagemonitor.requestmonitor.profiler.Profiler.stop(\""+m.getLongName()+"\");", true);
        }
        byteCode = cc.toBytecode();
        cc.detach();
      } catch (Exception ex) {
        throw new RuntimeException(ex);
      }
    }

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            CtClass c = classPool.getAndRename(NoOpTypeParameterMatcher.class.getName(), className);
            c.setModifiers(c.getModifiers() | Modifier.FINAL);
            c.getDeclaredMethod("match").setBody("{ return $1 instanceof " + typeName + "; }");
            byte[] byteCode = c.toBytecode();
            c.detach();
            Method method = ClassLoader.class.getDeclaredMethod(
                    "defineClass", String.class, byte[].class, int.class, int.class);
            method.setAccessible(true);


            Class<?> generated = (Class<?>) method.invoke(classLoader, className, byteCode, 0, byteCode.length);

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         {
            handleCtClass(ctClass, resource);
         }
         finally
         {
            ctClass.detach();               
         }
      }
      catch (ClassNotFoundException e)
      {
         if (forceAnnotations)

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        if (cc == null) {
            return null;
        }
        byte[] newClass = cc.toBytecode();
        cc.defrost();
        cc.detach();
        return newClass;
    }


    /**
     * Try to perform the actual model enhancing.

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  public void removeGeneratedClasses() {
    ClassPool pool = ClassPool.getDefault();
    for (Class<?> clazz : interfaces.values()) {
      CtClass ctClass = pool.getOrNull(clazz.getName());
      if (ctClass != null) {
        ctClass.detach();
        logger.debug("class {} is detached", clazz.getName());
      }
    }
  }
}

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         {
            handleCtClass(ctClass, resource);
         }
         finally
         {
            ctClass.detach();               
         }
      }
      catch (ClassNotFoundException e)
      {
         if (forceAnnotations)

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      Enum[] enums = c.getEnumConstants();


      // Rewrite the enum class
      CtClass oldEnum = info.getClazz();
      ClassPool pool = oldEnum.getClassPool();
      oldEnum.detach();
      CtClass baseEnum = pool.get("org.jboss.lang.Enum");
      CtClass newEnum = pool.makeClass(classname, baseEnum);


      // Create the enum ctor
      String ctorSrc = "protected " + newEnum.getSimpleName() + "(String name, int ord){super(name, ord);}";

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            if (verbose) {
                e.printStackTrace();
            }
        } finally {
            if (cl != null) {
                cl.detach();
            }
        }
        return classBytes;
    }

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  public void removeGeneratedClasses() {
    ClassPool pool = ClassPool.getDefault();
    for (Class<?> clazz : interfaces.values()) {
      CtClass ctClass = pool.getOrNull(clazz.getName());
      if (ctClass != null) {
        ctClass.detach();
        logger.debug("class {} is detached", clazz.getName());
      }
    }
  }
}

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