[PATCH] JMC-4326 : "ItemHandlerPage" - Columns should exist even though there is no data

[Marcus Hirt]

Hi Miro,

I think there may be some unintended consequences (e.g. Event Browser behaviour) 
with this solution. Let's chat a bit tonight.

Kind regards,
Marcus

On 2018-08-27, 09:57, "jmc-dev on behalf of Miro Wengner" <jmc-dev-bounces at openjdk.java.net on behalf of miro.wengner at gmail.com> wrote:

    Hi Marcus and everyone,
    
      here is my patch.
    test scenario:
     1. mvn clean package, mvn verify -> SUCCESS
     2. I’ve created different reading and changed columns visibilities, page state has been persisted and displayed after starting JCM again.
    
    Kind Regards,
    Miro
    
    patch:
    diff -r c4c637714f61 application/org.openjdk.jmc.flightrecorder.ui/src/main/java/org/openjdk/jmc/flightrecorder/ui/pages/itemhandler/AttributeComponentConfiguration.java
    --- a/application/org.openjdk.jmc.flightrecorder.ui/src/main/java/org/openjdk/jmc/flightrecorder/ui/pages/itemhandler/AttributeComponentConfiguration.java	Tue Aug 21 20:36:23 2018 +0200
    +++ b/application/org.openjdk.jmc.flightrecorder.ui/src/main/java/org/openjdk/jmc/flightrecorder/ui/pages/itemhandler/AttributeComponentConfiguration.java	Sun Aug 26 23:09:22 2018 +0200
    @@ -79,7 +79,7 @@
    
     	private void forEachType(IItemCollection items) {
     		if (items != null) {
    -			ItemCollectionToolkit.stream(items).filter(IItemIterable::hasItems).map(IItemIterable::getType)
    +			ItemCollectionToolkit.stream(items).map(IItemIterable::getType)
     					.forEach(type -> {
     						allTypes.put(type.getIdentifier(), type);
     						for (IAttribute<?> a : type.getAttributes()) {
    diff -r c4c637714f61 application/org.openjdk.jmc.flightrecorder.ui/src/main/java/org/openjdk/jmc/flightrecorder/ui/pages/itemhandler/ItemHandlerPage.java
    --- a/application/org.openjdk.jmc.flightrecorder.ui/src/main/java/org/openjdk/jmc/flightrecorder/ui/pages/itemhandler/ItemHandlerPage.java	Tue Aug 21 20:36:23 2018 +0200
    +++ b/application/org.openjdk.jmc.flightrecorder.ui/src/main/java/org/openjdk/jmc/flightrecorder/ui/pages/itemhandler/ItemHandlerPage.java	Sun Aug 26 23:09:22 2018 +0200
    @@ -215,7 +215,7 @@
     		private final ItemListAndChart itemListAndChart;
     		private IRange<IQuantity> currentRange;
     		private IItemCollection filteredItems;
    -		AttributeComponentConfiguration acc;
    +		private AttributeComponentConfiguration acc;
     		private IItemCollection selectionItems;
     		private String[] topics;