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| <H2> Initializers</H2> |
| The main purpose of an initializer is to identify a scope. However, it is more |
| than just a unique identifier. It points to the Java class that supplies initialization |
| information to the scope. In order to create an object from the org.eclipse.core.component.types |
| extension point, Eclipse must manually construct an initializer of the appropriate |
| type. This allows Eclipse to pass required context to components from outside |
| the component framework. Any component is allowed to depend on the initializer |
| for its scope, it to access this context. Currently most of the initializers provided |
| by the workbench have an empty public interface, so most clients would not want |
| to do this yet. <br> |
| <br> |
| Inheritance <span style="font-style: italic;"><span |
| style="font-weight: bold;">is</span> </span>taken into consideration between |
| initializer types. Registering a component type on an initializer's base class |
| will also affect the initializer and all of its subclasses. Initializers cannot |
| be interfaces, so only single inheritance is possible. For example, an interface |
| registered on <span |
| style="font-style: italic;">org.eclipse.core.component.ExtensionInitializer </span>would |
| be visible both from a part and from its site since <span |
| style="font-style: italic;">org.eclipse.core.component.ExtensionInitializer</span> |
| is a base class for both the part and site initializers.<br> |
| <br> |
| The workbench supplies the following initializer types:<br> |
| <br> |
| <table style="width: 100%; text-align: left;" border="1" cellpadding="2" |
| cellspacing="2"> |
| <tbody> |
| <tr> |
| <td style="vertical-align: top; font-weight: bold;">Initializer<br> </td> |
| <td style="vertical-align: top; font-weight: bold;">Base class<br> </td> |
| <td style="vertical-align: top; font-weight: bold;">Used for<br> </td> |
| </tr> |
| <tr> |
| <td style="vertical-align: top;">org.eclipse.core.component.ExtensionInitializer<br> |
| </td> |
| <td style="vertical-align: top;">none<br> </td> |
| <td style="vertical-align: top;">Dependencies used by any component created |
| from an extension point.<br> </td> |
| </tr> |
| <tr> |
| <td style="vertical-align: top;">org.eclipse.ui.part.PartInitializer<br> |
| </td> |
| <td style="vertical-align: top;">org.eclipse.core.component.ExtensionInitializer</td> |
| <td style="vertical-align: top;">Interfaces that can be implemented by a |
| part.<br> </td> |
| </tr> |
| <tr> |
| <td style="vertical-align: top;">org.eclipse.ui.part.SiteInitializer</td> |
| <td style="vertical-align: top;">org.eclipse.core.component.ExtensionInitializer</td> |
| <td style="vertical-align: top;">Components available from a site (such |
| as things a part can take in its constructor).<br> </td> |
| </tr> |
| <tr> |
| <td style="vertical-align: top;">org.eclipse.ui.part.SiteMultiplexerInitializer<br> |
| </td> |
| <td style="vertical-align: top;">org.eclipse.ui.part.SiteInitializer</td> |
| <td style="vertical-align: top;">Dependencies that only apply to site inside |
| a multiplexer (used to override the default component implementation provided |
| by a site).<br> </td> |
| </tr> |
| </tbody> |
| </table> |
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