plugin.xml

<?xml version="1.0" encoding="UTF-8"?>
<?eclipse version="3.4"?>
<plugin>
   <extension point="org.eclipse.ui.commands">
      <category name="JCE" id="JCE.commands.category" />
      <command name="Ecorify From..." categoryId="JCE.commands.category" id="JCE.commands.ecorifyCommand" />
      <command categoryId="JCE.commands.category" id="JCE.commands.extractCommand" name="Extract From..." />
   </extension>
   <extension point="org.eclipse.ui.handlers">
      <handler commandId="JCE.commands.ecorifyCommand" class="jce.handlers.EcorificationHandler" />
      <handler class="jce.handlers.ExtractionHandler" commandId="JCE.commands.extractCommand" />
   </extension>
   <extension point="org.eclipse.ui.menus">
      <menuContribution locationURI="popup:org.eclipse.ui.popup.any">
         <menu icon="src/main/resources/jce.gif" label="JCE" tooltip="Java Code Ecorification">
            <command commandId="JCE.commands.ecorifyCommand" id="JCE.menus.extractCommand" label="Ecorify Java Project..." mnemonic="S" tooltip="Start the Ecorification of Java code.">
               <visibleWhen>
                  <with variable="activeMenuSelection">
                     <iterate ifEmpty="false">
                        <adapt type="org.eclipse.core.resources.IProject">
                           <test property="org.eclipse.core.resources.open" value="open" />
                        </adapt>
                     </iterate>
                  </with>
               </visibleWhen>
            </command>
            <command commandId="JCE.commands.extractCommand" id="JCE.menus.extractCommand" label="Extract Ecore Metamodel..." tooltip="Start only the Ecore metamodel extraction of the Ecorification of Java code.">
               <visibleWhen>
                  <with variable="activeMenuSelection">
                     <iterate ifEmpty="false">
                        <adapt type="org.eclipse.core.resources.IProject">
                           <test property="org.eclipse.core.resources.open" value="open" />
                        </adapt>
                     </iterate>
                  </with>
               </visibleWhen>
            </command>
         </menu>
      </menuContribution>
   </extension>
</plugin>