Add popup action for Java projects in an Eclipse plugin

Question

I want to add popup item for Java projects in my Eclipse plugin. My plugin.xml contains:

<extension point="org.eclipse.ui.popupMenus">
  <objectContribution
        objectClass="org.eclipse.jdt.core.IJavaProject"
        id="com.contribution1">
     <action
           label="Action"
           class="com.actions.NewAction"
           enablesFor="1"
           id="com.actions.newAction">
     </action>
  </objectContribution>

However, the menu item is not shown in the popup. If I use IPackageFragment instead, the menu item shows just fine. Please advise.

Answer 1

Ok, the problem was that a Java project is considered an IJavaProject in the Java perspective only and the Eclipse instance used to test the plugin starts with the Resources perspective. If I switch to the Java perspective everything works as expected.

Answer 2

If you want to display your menu in another explorer (for instance in the Resources perspective's Project explorer), you'll have to change your objectContribution definition as follows:

1. Set the objectclass property to org.eclipse.core.resources.IProject .

2. Add a visibility element to filter your menu/actions for projects that DO NOT have the Java nature .

Ie:

<objectContribution
      adaptable="true"
      objectClass="org.eclipse.core.resources.IProject">
...
   <visibility>
      <objectState
            name="projectNature"
            value="org.eclipse.jdt.core.javanature">
      </objectState>
   </visibility>
</objectContribution>