Widgetset not compiling when Vaadin Board dependency added in Frame work 7.

Flow
1

this is what i get when I try to compile and I am using jdk 1.8

"— vaadin-maven-plugin:7.7.15:compile (default-cli) @ Harpy —
auto discovered modules [com.mycompany.harpy.AppWidgetSet]

Jun 14, 2019 11:22:36 AM java.util.prefs.WindowsPreferences
WARNING: Could not open/create prefs root node Software\JavaSoft\Prefs at root 0x80000002. Windows RegCreateKeyEx(…) returned error code 5.
Compiling module com.mycompany.harpy.AppWidgetSet
Tracing compile failure path for type ‘com.vaadin.board.client.BoardState’
[ERROR]
Errors in ‘jar:file:/C:/Users/Papa/.m2/repository/com/vaadin/vaadin-board/1.1.0/vaadin-board-1.1.0.jar!/com/vaadin/board/client/BoardState.java’
[ERROR]
Line 21: com.vaadin.shared.ui.AbstractComponentContainerState cannot be resolved to a type
Tracing compile failure path for type ‘com.vaadin.board.client.RowConnector’
[ERROR]
Errors in ‘jar:file:/C:/Users/Papa/.m2/repository/com/vaadin/vaadin-board/1.1.0/vaadin-board-1.1.0.jar!/com/vaadin/board/client/RowConnector.java’
[ERROR]
Line 39: Lambda expressions are allowed only at source level 1.8 or above
[ERROR]
Line 55: The return type is incompatible with AbstractComponentConnector.getState()
[ERROR]
Line 56: Cannot cast from AbstractComponentState to RowState
Tracing compile failure path for type ‘com.vaadin.board.client.BoardConnector’
[ERROR]
Errors in ‘jar:file:/C:/Users/Papa/.m2/repository/com/vaadin/vaadin-board/1.1.0/vaadin-board-1.1.0.jar!/com/vaadin/board/client/BoardConnector.java’
[ERROR]
Line 48: Lambda expressions are allowed only at source level 1.8 or above
[ERROR]
Line 89: Lambda expressions are allowed only at source level 1.8 or above
[ERROR]
Line 59: The return type is incompatible with AbstractComponentConnector.getState()
[ERROR]
Line 60: Cannot cast from AbstractComponentState to BoardState
Tracing compile failure path for type ‘com.vaadin.board.client.RowState’
[ERROR]
Errors in ‘jar:file:/C:/Users/Papa/.m2/repository/com/vaadin/vaadin-board/1.1.0/vaadin-board-1.1.0.jar!/com/vaadin/board/client/RowState.java’
[ERROR]
Line 25: The import com.vaadin.shared.ui.AbstractComponentContainerState cannot be resolved
[ERROR]
Line 27: AbstractComponentContainerState cannot be resolved to a type
[ERROR]
Aborting compile due to errors in some input files

BUILD FAILURE

2

There is a simple reason for this, Board component does not support Vaadin 7.

3

Tatu Lund:
There is a simple reason for this, Board component does not support Vaadin 7.

Hi Tatu,

So I removed the Board dependency( see attached POM.xml) and I am still getting a 500:

"
javax.servlet.ServletException: Filter execution threw an exception

root cause
java.lang.IncompatibleClassChangeError: Implementing class
"

thx

17737790.xml (12.7 KB)