In answer to Peter, the install is an explicit call to p2 Director from an Ant script as above with the build performed by Buckminster which we need to move away from. I stored an example of a clean up tool within this github repo. You can also use the lib file directly e.
Then you can try again to install with the p2 director again. Add a comment. Active Oldest Votes. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Podcast Making Agile work for data science. Stack Gives Back Featured on Meta.
Typical modules may include plug-ins "Plug-ins" , plug-in fragments "Fragments" , and features "Features". Each Feature may be packaged as a sub-directory in a directory named "features". Within a Feature, files named "feature. The terms and conditions governing Plug-ins and Fragments should be contained in files named "about.
The terms and conditions governing Features and Included Features should be contained in files named "license. Abouts and Feature Licenses may be located in any directory of a Download or Module including, but not limited to the following locations: - The top-level root directory - Plug-in and Fragment directories - Inside Plug-ins and Fragments packaged as JARs - Sub-directories of the directory named "src" of certain Plug-ins - Feature directories Note: if a Feature made available by the Eclipse Foundation is installed using the Provisioning Technology as defined below , you must agree to a license "Feature Update License" during the installation process.
If the Feature contains Included Features, the Feature Update License should either provide you with the terms and conditions governing the Included Features or inform you where you can locate them. Facebook Twitter. See installation instructions at:. Install WindowBuilder for Eclipse. Install e4 Tools Developer Resources for Eclipse. Java package name : org. Open Application.
In this exercise you create a model fragment to contribute a part descriptor. Create a simple plug-in project named com.
The following description abbreviates the plug-in name to the contribute. MF file, add the following plug-ins as dependencies to your contribute. The manifest should look similar to the following listing.
Version numbers have been removed as they change frequently-. Select the contribute. The fragment creation wizard also adds the org. To review this open the plugin. If the plugin. Select the Overview tab and click on the Extensions link. This shows the Extensions tab in the editor and once you add an extension in this tab the plugin. Ensure that on the the Extensions tab the field apply is set to always. Your entry then should look similar to this screenshot:.
If the entry in the plugin. Afterwards add a new extension for the org. Once this has been created, use the a right mouse click to add a fragment to the extension. Open the fragment. Select the Model Fragments node and press the Add button. Right click on this entry and select Add Child PartDescriptor. Choose the AdditionalInformationPart class. For pure e4 RCP applications this flag is not needed. Add the Eclipse model spy to your runtime application and ensure that you see the part descriptor.
Optional create a new handler which opens a new part based on this part descriptor. The programming model in Eclipse supports constructor, method and field injection according to the Java Specification Request JSR Eclipse also defines additional annotations for the purpose of dependency injection.
The most important annotations are covered in Annotations to define class dependencies in Eclipse , other more special annotations are covered in there corresponding chapters. The Eclipse dependency framework ensures that the key and the type of the injected object is correct.
For example, if you specify that you want to have an object of type Todo for the "xyz" key, as shown in the following field declaration, the framework will only inject an object if it finds one with an assignable type.
The following table gives an overview of dependency injection related annotations based on JSR and the Eclipse specific ones.
Defined by JSR, can be added to a field, a constructor or a method. The Eclipse framework tries to inject the corresponding objects into the fields or the parameters of the instance. Defined by JSR, defines the key for the value which should be injected. By default, the fully qualified class name is used as the key. Several keys for default values are defined as constants in the IServiceConstants interface. Eclipse specific annotation, marks an injected value to be optional.
If no valid object can be determined for the given key and type , the framework does not throw an exception. The specific behavior depends on where the Optional is placed. The following description is based on the key. If the key cannot be resolved the following happens:. Note that null is an acceptable value to be set in the context, and it is different from a key being removed from the context. For example, if the following is called context.
Eclipse specific annotation, indicates that updates for this Inject should be batched. If you change such objects in the Eclipse context, the update is triggered by the processWaiting method of the IEclipseContext object.
This annotation is intended to be used by the platform for performance optimization and should rarely be necessary in RCP applications. The Eclipse platform supports additional annotations for special purposes, e. The Eclipse runtime creates objects for the Java classes referred by the application model. During this instantiation the Eclipse runtime scans the class definition for annotations.
Based on these annotations the Eclipse framework performs the injection. Eclipse does not automatically perform dependency injection on objects which are created in your code with the new operator. The Eclipse framework tracks which object expressed a dependency to which key and type. If the value to which a key points changes, the Eclipse framework re-injects the new value in the object which expressed a dependency to the corresponding type.
This means applications can be freed from having to install and remove listeners. For example, you can define via Inject that you want to get the current selection injected. If the selection changes, the Eclipse framework will inject the new value. The re-injection only works on methods and fields which are marked with Inject. It will not work on parameters injected into constructors and methods which are marked with PostConstruct , as these methods are only executed once.
This does not mean that Eclipse tracks the fields of the value to which the key points. For example if the mykey1 key points to a Todo object as value, and the key points to a new object, this triggers the re-injection of the value to all objects which have a relevant class dependency. But if a field inside the existing Todo object changes, it does not trigger a re-injection.
OSGi services are available for dependency injection in Eclipse applications. If you define your custom OSGi services, you can inject them into your model objects. This removes the need to create singleton or factory implementations in your application to access data.
If a requested key is not found in the Eclipse context hierarchy, the Eclipse framework dynamically queries for a fitting OSGi service in the OSGi registry. For example, if you have an OSGi service declared for the TaskService interface you can inject it via the following code snippet into a field of an Eclipse part. During startup of an Eclipse application the Eclipse runtime creates an object based on the IEclipseContext interface.
This object is called the context or the Eclipse context. The context is similar to a Map data structure, in which objects can be placed under a certain key.
The key is a String and in several cases the fully qualified class name is used as key. The value to which the key points can be injected into other objects. But unlike a map, the Eclipse context is hierarchical and can also dynamically compute values for requested keys.
For certain model objects see Which model elements have a local context? Such a context is associated with an application model object. The different context objects are connected to form a hierarchical tree structure based on the structure of your application model. The highest level in this hierarchy is the application context. Objects can be placed at different levels in the context hierarchy. This allows that the same key points to different objects in the hierarchy. For example, a part can express a dependency to a Composite object via a field declaration similar to: Inject Composite parent; Since parts have different local contexts they can receive different objects of the type Composite.
Currently the following model elements implement the MContext interface and therefore have their own context:. The Eclipse framework creates the context hierarchy based on the application model during the start process. By default, it places certain objects under predefined keys into the context, e. The model objects and the created objects based on the class URI attributes are created by the Eclipse platform. For each model element with a custom context the Eclipse framework determines which objects should be available in the local context of the model object.
If required, it also creates the required Java objects referred by the Class URI property of the model elements. This is for example the case if a part is visible to the user. The renderer framework is responsible for creating the local context of the UI related model elements. This framework allows you to define classes which are responsible for setting up the UI implementation of the model objects.
A class responsible for a model element is called the renderer for this model element. For example, the ContributedPartRenderer class is the default renderer for part model objects. This renderer creates a Composite for every part and puts this Composite into the local context of the part. After the initial creation of the Eclipse context hierarchy, the framework or the application code can change the key-value pairs stored in the context.
In this case objects which were created with the related Eclipse functionality for example by the Eclipse dependency injection framework are updated with the new values. Objects in the context are persisted in memory transient , i. As described in On which objects does Eclipse perform dependency injection? During dependency injection for an object created by Eclipse, the Eclipse framework searches for a fitting object based on the specified key.
The search starts in the local context associated with the application model object. If this key is not available, Eclipse continues to search in the parent context.
This process continues until the main context has been reached. As you learn in later chapters the Eclipse context is not the only possible source of objects which can get injected. Other examples which are covered later are OSGi services, preferences, events and custom objects. The search happens mostly transparently for the caller of the injection. For the class references in the application model, the Eclipse framework creates the corresponding objects when needed.
Such an object has access to its corresponding model object via dependency injection. For example, in the implementation of a part you can access the model information of a part via: Inject MPart part;. The context can be modified by the application code and the framework. The Eclipse platform places the part which is currently selected and the active shell into the IEclipseContext of the application object.
The related keys are defined in the IServiceConstants interface. For example, the following method would allow you to track the current active part in another part. Eclipse uses handlers to define actions which can be triggered via menu or toolbar entries. For a handler implementation class it is not necessary to use these qualifiers, as a handler is executed in the active context of the application.
The Active annotation allows you to track values in a child context. The Eclipse framework keeps track of the current active branch in the hierarchy of the IEclipseContext. For example, if the user selects a part, the path in the IEclipseContext hierarchy from the root to the IEclipseContext of the part is the current active branch. With the Active annotation you can track values in the current active branch of a child element. Whenever the active branch changes and the value of the referred key changes this value is re-injected into the object which uses the Active annotation.
The Active annotation is currently not used within the Eclipse framework itself and the author of this tutorial has not yet managed to find a good use case for this annotation.
If you use a framework in your application, you need to have a convention for how your application interacts with the framework. For example, if a Java object is responsible for handling a toolbar button click, the framework needs to know which method of this object needs to be called. This API defines how you can interact with the framework from your code.
The API also defines the interaction of application objects created or controlled by the framework. Typically, a framework uses inheritance or annotations for this purpose. The "traditional" way of defining an API is via inheritance. This approach requires that your classes extend or implement framework classes and interfaces. The Eclipse 3.
In the example of the toolbar button the method might be called execute and the framework knows that this method must be called once the button is clicked. API definition via inheritance is a simple way to define an API, but it also couples the classes tightly to the framework. For example, testing the class without the framework is difficult. It also makes extending or updating the framework difficult as such an update may affect clients.
This is why the Eclipse 4. The Eclipse 4. These annotations are called behavior annotations. Is called after the class is constructed and the field and method injection has been performed. Is called if a save request on the part is triggered by the Eclipse framework.
Is called before the model object is disposed, so that the part is able to save its instance state. This method is called before the PreDestroy method. The PostConstruct , PreDestroy annotations are included in the javax. Persist , PersistState and Focus are part of the org. Eclipse defines additional behavior annotations for commands and for the application life cycle which are covered in the respective chapters. Behavior annotations imply that the framework needs to provide the specified parameters to the method, i.
If you also add the Inject annotation, the method is called twice, first during the dependency injection phase and later for the behavior annotation.
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