/** * Build and return the default (zero-argument) constructor for the factory class. */ protected Constructor buildFactoryDefaultConstructor() throws DescriptorException { return this.buildDefaultConstructorFor(this.getFactoryClass()); }
protected Object buildFactory() throws DescriptorException { // If there is no factory class specified, there is no factory; // we will be using a static method defined by the descriptor class... if (this.getFactoryClass() == null) { return null; } // If there is a factory class specified but no factory method name, // instantiate the factory using the default constructor if (this.getFactoryMethodName() == null) { return this.buildFactoryUsingDefaultConstructor(); } // If both the factory class and the factory method name have been specified, // instantiate the factory by invoking the static factory method return this.buildFactoryUsingStaticMethod(); }
/** * Build and return the factory, using the specified static method. */ protected Object buildFactoryUsingStaticMethod() throws DescriptorException { Method factoryMethod = this.buildMethod(this.getFactoryClass(), this.getFactoryMethodName(), new Class[0]); try { // it should be static and zero-argument... if (PrivilegedAccessHelper.shouldUsePrivilegedAccess()){ try { return AccessController.doPrivileged(new PrivilegedMethodInvoker(factoryMethod, null, null)); } catch (PrivilegedActionException exception) { Exception throwableException = exception.getException(); if (throwableException instanceof IllegalAccessException) { throw DescriptorException.illegalAccessWhileMethodInstantiationOfFactory(getFactoryMethodName(), getDescriptor(), throwableException); } else { throw DescriptorException.targetInvocationWhileMethodInstantiationOfFactory(getFactoryMethodName(), getDescriptor(), throwableException); } } } else { return PrivilegedAccessHelper.invokeMethod(factoryMethod, null, null); } } catch (IllegalAccessException exception) { throw DescriptorException.illegalAccessWhileMethodInstantiationOfFactory(getFactoryMethodName(), getDescriptor(), exception); } catch (InvocationTargetException exception) { throw DescriptorException.targetInvocationWhileMethodInstantiationOfFactory(getFactoryMethodName(), getDescriptor(), exception); } catch (NullPointerException exception) { // Some JVMs will throw a NULL pointer exception here throw DescriptorException.nullPointerWhileMethodInstantiationOfFactory(getFactoryMethodName(), getDescriptor(), exception); } }