我开发了一个简单的插件来生成一些例程代码。这个插件对包资源管理器的弹出菜单有贡献。从开发环境（来自 Eclipse RCP）运行时，它按预期工作Launch as Eclipse application——适当的菜单项出现在菜单中，并且它的调用符合预期。
但是，我很难将它部署到不同的 Eclipse 实例中。
开发的插件使用导出向导导出，生成一个单独的 jar 文件。这个 jar 文件已被放置到另一个 Eclipse 安装（新解包）的 dropings 目录中。当这个 Eclipse 实例启动时，Package Explorer 的弹出菜单不包含贡献的菜单项。来自 Eclipse Installation Details 的信息显示插件存在于 Plug-Ins 选项卡上，并且 Configuration 选项卡将其列为tg.companion (1.0.0.201208132302) "Companion Object Generator" [Starting].
我错过了什么？为什么贡献的菜单项不显示？
谢谢。
对于locationURI菜单贡献是popup:org.eclipse.jdt.ui.PackageExplorer，对于属性的价值allPopups是true。
该插件未签名。
这是可能会有所启发的插件文件。
插件.xml：
<?xml version="1.0" encoding="UTF-8"?>
<?eclipse version="3.4"?>
<plugin>
<extension point="org.eclipse.ui.menus">
<menuContribution
allPopups="true"
locationURI="popup:org.eclipse.jdt.ui.PackageExplorer">
<command
commandId="tg.companion.handler.generator"
label="TG Create Companion Object"
style="push"
tooltip="Creates a companion object to the selected entity object, and provides DAO/RAO implementations">
</command>
</menuContribution>
</extension>
<extension point="org.eclipse.ui.commands">
<command
defaultHandler="tg.companion.handler.GenerateCompanionObjects"
id="tg.companion.handler.generator"
name="Generate Comanion">
</command>
</extension>
</plugin>
清单.MF：
Manifest-Version: 1.0
Bundle-ManifestVersion: 2
Bundle-Name: Companion Object Generator
Bundle-SymbolicName: tg.companion;singleton:=true
Bundle-Version: 1.0.0.qualifier
Bundle-Activator: tg.companion.Activator
Bundle-Vendor: TG
Require-Bundle: org.eclipse.ui,
org.eclipse.core.runtime,
org.eclipse.jdt.core;bundle-version="3.8.1",
org.eclipse.core.resources;bundle-version="3.8.0",
org.eclipse.core.expressions;bundle-version="3.4.400"
Bundle-RequiredExecutionEnvironment: JavaSE-1.6
Bundle-ActivationPolicy: lazy
命令处理程序：
package tg.companion.handler;
import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.commands.IHandler;
import org.eclipse.core.resources.IFolder;
import org.eclipse.core.resources.IProject;
import org.eclipse.jdt.core.ICompilationUnit;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.IPackageFragment;
import org.eclipse.jdt.core.IPackageFragmentRoot;
import org.eclipse.jdt.core.IType;
import org.eclipse.jdt.core.JavaCore;
import org.eclipse.jdt.core.JavaModelException;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.handlers.HandlerUtil;
public class GenerateCompanionObjects extends AbstractHandler implements IHandler {
@Override
public Object execute(final ExecutionEvent event) throws ExecutionException {
final Shell shell = HandlerUtil.getActiveShell(event);
final ISelection sel = HandlerUtil.getActiveMenuSelection(event);
final IStructuredSelection selection = (IStructuredSelection) sel;
final Object firstElement = selection.getFirstElement();
if (firstElement instanceof ICompilationUnit) {
createOutput(shell, (ICompilationUnit) firstElement);
} else {
MessageDialog.openWarning(shell, "Companion Object Generation Warning", "Please select an entity object for generating a corresponding companion.");
}
return null;
}
private void createOutput(final Shell shell, final ICompilationUnit cu) {
// does code generation work using Java Model
}
}