Missing required bundle org.eclipse.core.databinding.beans_0.0.0

开发环境：

eclipse 3.7.1  RCP SDK

问题产生过程：

新建eclipse RCP工程，使用windowbuilder设计editor界面，将某控件（如：label）进行数据绑定。

 

eclipse 后台生成代码：

protected DataBindingContext initDataBindings() {
        DataBindingContext bindingContext = new DataBindingContext();
        
        IObservableValue lblSysNoObserveTextObserveWidget = SWTObservables.observeText(lblSysNo);
        IObservableValue sysContextSysTypesystemNameObserveValue = PojoObservables.observeValue(sysContext, "sysType.systemNo");
        bindingContext.bindValue(lblSysNoObserveTextObserveWidget, sysContextSysTypesystemNameObserveValue, null, null);

return bindingContext;

}

 保存程序后运行代码出现一下错误信息。 

错误信息： 

!SESSION 2011-11-22 22:58:20.305 -----------------------------------------------

eclipse.buildId=unknown

java.version=1.6.0_22

java.vendor=Sun Microsystems Inc.

BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=zh_CN

Framework arguments:  -application teshost.application

Command-line arguments:  -application teshost.application -data D:\work\src/../runtime-teshost.application -dev file:D:/work/src/.metadata/.plugins/org.eclipse.pde.core/teshost.application/dev.properties -os win32 -ws win32 -arch x86 -consoleLog

!ENTRY org.eclipse.osgi 2 0 2011-11-22 22:58:21.360

!MESSAGE One or more bundles are not resolved because the following root constraints are not resolved:

!SUBENTRY 1 org.eclipse.osgi 2 0 2011-11-22 22:58:21.360

!MESSAGE Bundle initial@reference:file:http://www.cnblogs.com/work/src/teshost/ was not resolved.

!SUBENTRY 2 teshost 2 0 2011-11-22 22:58:21.360

!MESSAGE Missing required bundle org.eclipse.core.databinding.beans_0.0.0.

!ENTRY org.eclipse.osgi 2 0 2011-11-22 22:58:21.361

!MESSAGE The following is a complete list of bundles which are not resolved, see the prior log entry for the root cause if it exists:

!SUBENTRY 1 org.eclipse.osgi 2 0 2011-11-22 22:58:21.362

!MESSAGE Bundle teshost_1.0.0 [38] was not resolved.

!SUBENTRY 2 teshost 2 0 2011-11-22 22:58:21.362

!MESSAGE Missing required bundle org.eclipse.core.databinding.beans_0.0.0.

!ENTRY org.eclipse.osgi 2 0 2011-11-22 22:58:21.371

!MESSAGE One or more bundles are not resolved because the following root constraints are not resolved:

!SUBENTRY 1 org.eclipse.osgi 2 0 2011-11-22 22:58:21.371

!MESSAGE Bundle initial@reference:file:http://www.cnblogs.com/work/src/teshost/ was not resolved.

!SUBENTRY 2 teshost 2 0 2011-11-22 22:58:21.372

!MESSAGE Missing required bundle org.eclipse.core.databinding.beans_0.0.0.

!ENTRY org.eclipse.osgi 2 0 2011-11-22 22:58:21.373

!MESSAGE The following is a complete list of bundles which are not resolved, see the prior log entry for the root cause if it exists:

!SUBENTRY 1 org.eclipse.osgi 2 0 2011-11-22 22:58:21.373

!MESSAGE Bundle teshost_1.0.0 [38] was not resolved.

!SUBENTRY 2 teshost 2 0 2011-11-22 22:58:21.373

!MESSAGE Missing required bundle org.eclipse.core.databinding.beans_0.0.0.

!ENTRY org.eclipse.osgi 4 0 2011-11-22 22:58:21.374

!MESSAGE Application error

!STACK 1

java.lang.RuntimeException: Application "teshost.application" could not be found in the registry. The applications available are: org.eclipse.equinox.app.error.

at org.eclipse.equinox.internal.app.EclipseAppContainer.startDefaultApp(EclipseAppContainer.java:248)

at org.eclipse.equinox.internal.app.MainApplicationLauncher.run(MainApplicationLauncher.java:29)

at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)

at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)

at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:369)

at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

at java.lang.reflect.Method.invoke(Unknown Source)

at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:619)

at org.eclipse.equinox.launcher.Main.basicRun(Main.java:574)

at org.eclipse.equinox.launcher.Main.run(Main.java:1407)

at org.eclipse.equinox.launcher.Main.main(Main.java:1383)

An error has occurred. See the log file 

错误原因：

生成的绑定代码中，PojoObservables 来自于

 org.eclipse.core.databinding.beans jar包。 

这个jar包本在 Plug-in Dependencies中，但是项目无论如何加载不了，具体错误原因不明，跟进代码调试，会报异常：

 java.lang.RuntimeException: No application id has been found.

at org.eclipse.equinox.internal.app.EclipseAppContainer.startDefaultApp(EclipseAppContainer.java:242)

解决方法： 

1. 找到eclipse安装目录下的对应jar包， 如： d:\eclipse-SDK-3.7.1-win32\eclipse\plugins\org.eclipse.core.databinding.beans_1.2.100.I20100824-0800.jar

2. 将该jar包以外部jar包形式添加到项目引用（Add Extenal JARS...）

3. 将 jar包copy到项目下的lib文件夹下

4.  打开项目的MANIFEST.MF文件，转到MANIFEST.MF Tab页面

5. 删除依赖项：

 Require-Bundle: org.eclipse.ui,

 org.eclipse.core.runtime,

 org.eclipse.core.databinding,

 org.eclipse.core.databinding.beans,  //删除这一行，由于第2部的原因，项目生成代码不会因为找到命名空间而报错。

 org.eclipse.core.databinding.observable,

 org.eclipse.core.databinding.property,

 org.eclipse.jface.databinding

 6. 分别在runtime 和 build tab页面中添加jar包的引用

7. 重新启动执行，问题解决 

PS: 该问题具体原因不明，有可能是RCP的一个bug。