构建 Eclipse 插件在 EMF 模型中浏览内容

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AdapterFactoryContentProvider

AdapterFactoryLabelProvider

ComposedAdapterFactory

关于 Common Navigator Framework 的更多信息 Michael Elder 的博客（请参阅 参考资料）中提供了大量有关 Common Navigator Framework (CNF) 的功能和用法的教程。我强烈建议对 CMF 感兴趣的开发人员学习一下这些教程。

org.eclipse.ui.navigator

org.eclipse.ui.navigator.resources

IResource

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ModelNavigator

com.ibm.navigator.example.modelnavigator

com.ibm.navigator.example.modelnavigator.ModelNavigatorPlugin

com.ibm.navigator.example.modelnavigator.mncategory

Model Navigator

com.ibm.navigator.example.modelnavigator.mnview

Model Navigator View

org.eclipse.ui.navigator.CommonNavigator

com.ibm.navigator.example.modelnavigator.mncategory

ViewPart

org.eclipse.ui.navigator

com.ibm.navigator.example.modelnavigator.mnview

IResource

viewerContentBinding

viewerActionBinding

IResource

com.ibm.navigator.example.modelnavigator.mnview

org.eclipse.ui.navigator.resourceContent

IResource

com.ibm.navigator.example.modelnavigator.mnview

org.eclipse.ui.navigator.resources.*

IResource

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org.eclipse.ui.navigator.navigatorContent

triggerPoints

possibleChildren

navigatorContent

org.eclipse.ui.navigator.navigatorContent

com.ibm.navigator.example.modelnavigator.emfModelContent

EMF Model Content

com.ibm.navigator.example.modelnavigator.MNViewContentProvider

com.ibm.navigator.example.modelnavigator.MNViewLabelProvider

normal

true

AdapterFactoryContentProvider

AdapterFactoryLabelProvider

MNComposedAdapterFactory

org.eclipse.emf.codegen.ecore.ui

ComposedAdapterFactory

MNComposedAdapterFactory

...
public class MNComposedAdapterFactory
{
private static ComposedAdapterFactory mnCompAdapterFactory;

public final static ComposedAdapterFactory getAdapterFactory()
{
if (mnCompAdapterFactory == null)
mnCompAdapterFactory = new ComposedAdapterFactory(createFactoryList());
return mnCompAdapterFactory;
}

public final static ArrayList<AdapterFactory> createFactoryList()
{
ArrayList<AdapterFactory> factories = new ArrayList<AdapterFactory>();
factories.add(new ResourceItemProviderAdapterFactory());
factories.add(new EcoreItemProviderAdapterFactory());
factories.add(new ReflectiveItemProviderAdapterFactory());
return factories;
}
}

EcoreItemProviderAdapterFactory

navigatorContent

MNViewContentProvider

ITreeContentProvider

MNViewContentProvider

AdapterFactoryContentProvider

AdapterFactoryContentProvider

ITreeContentProvider

AdapterFactoryContentProvider

super(MNComposedAdapterFactory.getAdapterFactory());

getChildren

getParent

hasChildren

getElements

getChildren

getElements

getChildren

AdapterFactoryContentProvider

getChildren

getElements

getChildren

...
public Object[] getChildren(Object parentElement)
{
if (parentElement instanceof IFile)
{
String path = ((IFile)parentElement).getFullPath().toString();
URI uri = URI.createPlatformResourceURI(path, true);
parentElement = resourceSet.getResource(uri, true);
}
return super.getChildren(parentElement);
}
...

...
public Object getParent(Object element)
{
if (element instanceof IFile)
return ((IResource)element).getParent();
return super.getParent(element);
}

public boolean hasChildren(Object element)
{
if (element instanceof IFile)
return true;
return super.hasChildren(element);
}
...

org.eclipse.core.resources

private static ResourceSetImpl resourceSet = new ResourceSetImpl();

MNViewContentProvider

AdapterFactoryLabelProvider

Image

String

AdapterFactoryLabelProvider

...
public MNViewLabelProvider()
{
super(MNComposedAdapterFactory.getAdapterFactory());
}

public Image getImage(Object element)
{
return super.getImage(element);
}

public String getText(Object element)
{
return super.getText(element);
}
...

<possibleChildren />

<triggerPoints />

<triggerPoints>
<or>
<and>
<instanceof value="org.eclipse.core.resources.IResource"/>
<test
forcePluginActivation="true"
property="org.eclipse.core.resources.extension"
value="ecore"/>
</and>
</or>
</triggerPoints>
<possibleChildren>
<or>
<instanceof value="org.eclipse.emf.ecore.resource.Resource"/>
<instanceof value="org.eclipse.emf.ecore.EObject"/>
</or>
</possibleChildren>

IResource

com.ibm.navigator.example.modelnavigator.emfModelContent

navigatorContent

com.ibm.navigator.example.modelnavigator.emfModelContent

IResource

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测试 EMF 项目 要运行此测试，您可以选择将现有的 EMF 项目导入到运行时 Eclipse 工作区，或者创建新项目。EMF Developers Guide 教程向您展示了如何创建导入 UML 模型的新项目，可以选择下载并安装。

SchoolLibrary

SchoolLibrary

SchoolLibrary

library

SchoolLibrary

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MNViewContentProvider

IResourceChangeListener

IResourceDeltaVisitor

resourceChanged(IResourceChangeEvent event)

resourceChanged(IResourceChangeEvent event)

...
try
{
IResourceDelta delta = event.getDelta();
delta.accept(this);
}
catch (CoreException e)
{
...

visit(IResourceDelta delta)

...
IResource changedResource = delta.getResource();
if (changedResource.getType() == IResource.FILE
&& changedResource.getFileExtension().equals("ecore"))
{
try
{
String path = ((IFile)changedResource).getFullPath().toString();
URI uri = URI.createPlatformResourceURI(path, true);
Resource res = resourceSet.getResource(uri, true);
res.unload();
res.load(resourceSet.getLoadOptions());
}
catch(IOException ie)
{
System.out.println("Error reloading resource - " + ie.toString());
}
return false;
}
return true;
...

MNContentProvider

ResourcesPlugin.getWorkspace().addResourceChangeListener(this, IResourceChangeEvent.POST_CHANGE);

ResourcesPlugin.getWorkspace().removeResourceChangeListener(this);

Test

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ComposedAdapterFactory

genmodel

MNComposedAdapterFactory

factories.add(new GenModelItemProviderAdapterFactory());

createFactoryList()

<and>
<instanceof value="org.eclipse.core.resources.IResource"/>
<test
forcePluginActivation="true"
property="org.eclipse.core.resources.extension"
value="genmodel"/>
</and>

IResource

IResource

genmodel

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	关于下载方法的信息

		Javier Torres 是一名软件工程师，任职于 IBM Software Group 的新兴标准组织。他在 2007 年受聘于 IBM，目前他主要致力于能源和公用事业中基于标准的解决方案开发工作。他拥有 Florida International University 计算机科学专业的硕士学位和计算机工程专业的学士学位。