Updated phpdoc

Item/ItemProcessorInterface.php

@@ -16,13 +16,14 @@ interface ItemProcessorInterface
 {
     /**
      * Process the provided item, returning a potentially modified or new item for continued
-     * processing.  If the returned result is null, it is assumed that processing of the item
-     * should not continue.
+     * processing. It should not return null, instead it should throw an InvalidItemException
+     * in case of warning;
      *
      * @param mixed $item item to be processed
      *
-     * @return mixed Potentially modified or new item for continued processing, null if processing of the
-     *  provided item should not continue.
+     * @return mixed Potentially modified or new item for continued processing
+     * @throws InvalidItemException if there is a problem processing the current record
+     * (but the next one may still be valid)
      * @throws \Exception
      */
     public function process($item);

Item/ItemReaderInterface.php

@@ -21,16 +21,12 @@ interface ItemReaderInterface
      * <strong>must</strong> return <code>null</code> at the end of the input
      * data set.
      *
-     * @throws ParseException if there is a problem parsing the current record
+     * @throws InvalidItemException if there is a problem reading the current record
      * (but the next one may still be valid)
-     * @throws NonTransientResourceException if there is a fatal exception in
-     * the underlying resource. After throwing this exception implementations
-     * should endeavour to return null from subsequent calls to read.
-     * @throws UnexpectedInputException if there is an uncategorised problem
-     * with the input data. Assume potentially transient, so subsequent calls to
-     * read might succeed.
-     * @throws \Exception if an there is a non-specific error.
-     * @return null|mixed Returns false in case of reading error
+     * @throws \Exception if an there is a non-specific error. (step execution will
+     * be stopped in that case)
+     *
+     * @return null|mixed
      */
     public function read();
 }

Item/ItemWriterInterface.php

@@ -28,6 +28,8 @@ interface ItemWriterInterface
      *
      * FIXME: array is not maybe the best structure to hold the items. Investigate this point.
      *
+     * @throw InvalidItemException if there is a warning, step execution will continue to the
+     * next item.
      * @throws \Exception if there are errors. The framework will catch the
      * exception and convert or rethrow it as appropriate.
      */