Examples of org.eclipse.core.runtime.IConfigurationElement

org.eclipse.core.runtime.IConfigurationElement
A configuration element, with its attributes and children, directly reflects the content and structure of the extension section within the declaring plug-in's manifest (plugin.xml) file.
This interface also provides a way to create executable extension objects.

These registry objects are intended for relatively short-term use. Clients that deal with these objects must be aware that they may become invalid if the declaring plug-in is updated or uninstalled. If this happens, all methods except {@link #isValid()} will throw {@link InvalidRegistryObjectException}. For configuration element objects, the most common case is code in a plug-in dealing with extensions contributed to one of the extension points it declares. Code in a plug-in that has declared that it is not dynamic aware (or not declared anything) can safely ignore this issue, since the registry would not be modified while it is active. However, code in a plug-in that declares that it is dynamic aware must be careful when accessing the extension and configuration element objects because they become invalid if the contributing plug-in is removed. Similarly, tools that analyze or display the extension registry are vulnerable. Client code can pre-test for invalid objects by calling {@link #isValid()}, which never throws this exception. However, pre-tests are usually not sufficient because of the possibility of the extension or configuration element object becoming invalid as a result of a concurrent activity. At-risk clients must treat InvalidRegistryObjectException as if it were a checked exception. Also, such clients should probably register a listener with the extension registry so that they receive notification of any changes to the registry.
This interface can be used without OSGi running.
This interface is not intended to be implemented by clients.

      }
    }


    // The registry.
    for (int i = configurationElementCount - 1; i >= 0; i--) {
      final IConfigurationElement configurationElement = configurationElements[i];


      String id = configurationElement
          .getAttribute(ATT_KEY_CONFIGURATION_ID);
      if (id != null) {
        try {
          bindingManager
              .setActiveScheme(bindingManager.getScheme(id));
          return;
        } catch (final NotDefinedException e) {
          // Let's keep looking....
        }
      }


      id = configurationElement.getAttribute(ATT_VALUE);
      if (id != null) {
        try {
          bindingManager
              .setActiveScheme(bindingManager.getScheme(id));
          return;

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      final ICommandService commandService) {
    final Collection bindings = new ArrayList(configurationElementCount);
    final List warningsToLog = new ArrayList(1);


    for (int i = 0; i < configurationElementCount; i++) {
      final IConfigurationElement configurationElement = configurationElements[i];


      /*
       * Read out the command id. Doing this before determining if the key
       * binding is actually valid is a bit wasteful. However, it is
       * helpful to have the command identifier when logging syntax
       * errors.
       */
      String commandId = configurationElement
          .getAttribute(ATT_COMMAND_ID);
      if ((commandId == null) || (commandId.length() == 0)) {
        commandId = configurationElement.getAttribute(ATT_COMMAND);
      }
      if ((commandId != null) && (commandId.length() == 0)) {
        commandId = null;
      }
      final Command command;
      if (commandId != null) {
        command = commandService.getCommand(commandId);
        if (!command.isDefined()) {
          // Reference to an undefined command. This is invalid.
          addWarning(warningsToLog,
              "Cannot bind to an undefined command", //$NON-NLS-1$
              configurationElement, commandId);
          continue;
        }
      } else {
        command = null;
      }


      // Read out the scheme id.
      String schemeId = configurationElement.getAttribute(ATT_SCHEME_ID);
      if ((schemeId == null) || (schemeId.length() == 0)) {
        schemeId = configurationElement
            .getAttribute(ATT_KEY_CONFIGURATION_ID);
        if ((schemeId == null) || (schemeId.length() == 0)) {
          schemeId = configurationElement
              .getAttribute(ATT_CONFIGURATION);
          if ((schemeId == null) || (schemeId.length() == 0)) {
            // The scheme id should never be null. This is invalid.
            addWarning(warningsToLog, "Key bindings need a scheme", //$NON-NLS-1$
                configurationElement, commandId);
            continue;
          }
        }
      }


      // Read out the context id.
      String contextId = configurationElement
          .getAttribute(ATT_CONTEXT_ID);
      if (LEGACY_DEFAULT_SCOPE.equals(contextId)) {
        contextId = null;
      } else if ((contextId == null) || (contextId.length() == 0)) {
        contextId = configurationElement.getAttribute(ATT_SCOPE);
        if (LEGACY_DEFAULT_SCOPE.equals(contextId)) {
          contextId = null;
        }
      }
      if ((contextId == null) || (contextId.length() == 0)) {
        contextId = IContextIds.CONTEXT_ID_WINDOW;
      }


      // Read out the key sequence.
      KeySequence keySequence = null;
      String keySequenceText = configurationElement
          .getAttribute(ATT_SEQUENCE);
      if ((keySequenceText == null) || (keySequenceText.length() == 0)) {
        keySequenceText = configurationElement
            .getAttribute(ATT_KEY_SEQUENCE);
      }
      if ((keySequenceText == null) || (keySequenceText.length() == 0)) {
        keySequenceText = configurationElement.getAttribute(ATT_STRING);
        if ((keySequenceText == null)
            || (keySequenceText.length() == 0)) {
          // The key sequence should never be null. This is pointless
          addWarning(
              warningsToLog,
              "Defining a key binding with no key sequence has no effect", //$NON-NLS-1$
              configurationElement, commandId);
          continue;
        }


        // The key sequence is in the old-style format.
        try {
          keySequence = convert2_1Sequence(parse2_1Sequence(keySequenceText));
        } catch (final IllegalArgumentException e) {
          addWarning(warningsToLog, "Could not parse key sequence", //$NON-NLS-1$
              configurationElement, commandId, "keySequence", //$NON-NLS-1$
              keySequenceText);
          continue;
        }


      } else {
        // The key sequence is in the new-style format.
        try {
          keySequence = KeySequence.getInstance(keySequenceText);
        } catch (final ParseException e) {
          addWarning(warningsToLog, "Could not parse key sequence", //$NON-NLS-1$
              configurationElement, commandId, "keySequence", //$NON-NLS-1$
              keySequenceText);
          continue;
        }
        if (keySequence.isEmpty() || !keySequence.isComplete()) {
          addWarning(
              warningsToLog,
              "Key bindings should not have an empty or incomplete key sequence", //$NON-NLS-1$
              configurationElement, commandId, "keySequence", //$NON-NLS-1$
              keySequence.toString());
          continue;
        }


      }


      // Read out the locale and platform.
      String locale = configurationElement.getAttribute(ATT_LOCALE);
      if ((locale != null) && (locale.length() == 0)) {
        locale = null;
      }
      String platform = configurationElement.getAttribute(ATT_PLATFORM);
      if ((platform != null) && (platform.length() == 0)) {
        platform = null;
      }


      // Read out the parameters, if any.

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    }


    final List warningsToLog = new ArrayList(1);


    for (int i = 0; i < configurationElementCount; i++) {
      final IConfigurationElement configurationElement = configurationElements[i];


      // Read out the attributes.
      final String id = readRequired(configurationElement, ATT_ID,
          warningsToLog, "Schemes need an id"); //$NON-NLS-1$
      if (id == null) {
        continue;
      }
      final String name = readRequired(configurationElement, ATT_NAME,
          warningsToLog, "A scheme needs a name", id); //$NON-NLS-1$
      if (name == null) {
        continue;
      }
      final String description = readOptional(configurationElement,
          ATT_DESCRIPTION);


      String parentId = configurationElement.getAttribute(ATT_PARENT_ID);
      if ((parentId != null) && (parentId.length() == 0)) {
        parentId = configurationElement.getAttribute(ATT_PARENT);
        if ((parentId != null) && (parentId.length() == 0)) {
          parentId = null;
        }
      }

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    // Sort the bindings extension point based on element name.
    final IConfigurationElement[] bindingsExtensionPoint = registry
        .getConfigurationElementsFor(EXTENSION_BINDINGS);
    for (int i = 0; i < bindingsExtensionPoint.length; i++) {
      final IConfigurationElement configurationElement = bindingsExtensionPoint[i];
      final String name = configurationElement.getName();


      // Check if it is a binding definition.
      if (TAG_KEY.equals(name)) {
        addElementToIndexedArray(configurationElement,
            indexedConfigurationElements,
            INDEX_BINDING_DEFINITIONS, bindingDefinitionCount++);
      } else
      // Check to see if it is a scheme definition.
      if (TAG_SCHEME.equals(name)) {
        addElementToIndexedArray(configurationElement,
            indexedConfigurationElements, INDEX_SCHEME_DEFINITIONS,
            schemeDefinitionCount++);
      }


    }


    // Sort the commands extension point based on element name.
    final IConfigurationElement[] commandsExtensionPoint = registry
        .getConfigurationElementsFor(EXTENSION_COMMANDS);
    for (int i = 0; i < commandsExtensionPoint.length; i++) {
      final IConfigurationElement configurationElement = commandsExtensionPoint[i];
      final String name = configurationElement.getName();


      // Check if it is a binding definition.
      if (TAG_KEY_BINDING.equals(name)) {
        addElementToIndexedArray(configurationElement,
            indexedConfigurationElements,
            INDEX_BINDING_DEFINITIONS, bindingDefinitionCount++);


        // Check if it is a scheme defintion.
      } else if (TAG_KEY_CONFIGURATION.equals(name)) {
        addElementToIndexedArray(configurationElement,
            indexedConfigurationElements, INDEX_SCHEME_DEFINITIONS,
            schemeDefinitionCount++);


        // Check if it is an active scheme identifier.
      } else if (TAG_ACTIVE_KEY_CONFIGURATION.equals(name)) {
        addElementToIndexedArray(configurationElement,
            indexedConfigurationElements, INDEX_ACTIVE_SCHEME,
            activeSchemeElementCount++);
      }
    }


    /*
     * Sort the accelerator configuration extension point into the scheme
     * definitions.
     */
    final IConfigurationElement[] acceleratorConfigurationsExtensionPoint = registry
        .getConfigurationElementsFor(EXTENSION_ACCELERATOR_CONFIGURATIONS);
    for (int i = 0; i < acceleratorConfigurationsExtensionPoint.length; i++) {
      final IConfigurationElement configurationElement = acceleratorConfigurationsExtensionPoint[i];
      final String name = configurationElement.getName();


      // Check if the name matches the accelerator configuration element
      if (TAG_ACCELERATOR_CONFIGURATION.equals(name)) {
        addElementToIndexedArray(configurationElement,
            indexedConfigurationElements, INDEX_SCHEME_DEFINITIONS,

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                .getConfigurationElements();


        // look for the startup tag in each element and run the extension
        boolean foundAtLeastOne = false;
        for (int i = 0; i < configElements.length; ++i) {
            IConfigurationElement element = configElements[i];
            if (element != null
                    && element.getName()
                            .equals(IWorkbenchConstants.TAG_STARTUP)) {
                runEarlyStartup(getExecutableExtension(element));
                foundAtLeastOne = true;
            }
        }

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    commandImageManager.clear();


    final List warningsToLog = new ArrayList(1);


    for (int i = 0; i < configurationElementCount; i++) {
      final IConfigurationElement configurationElement = configurationElements[i];


      // Read out the command identifier.
      final String commandId = readRequired(configurationElement,
          ATT_COMMAND_ID, warningsToLog, "Image needs an id"); //$NON-NLS-1$
      if (commandId == null) {
        continue;
      }


      if (!commandService.getCommand(commandId).isDefined()) {
        // Reference to an undefined command. This is invalid.
        addWarning(warningsToLog,
            "Cannot bind to an undefined command", //$NON-NLS-1$
            configurationElement, commandId);
        continue;
      }


      // Read out the style.
      final String style = readOptional(configurationElement, ATT_STYLE);


      // Read out the default icon.
      final String icon = readRequired(configurationElement, ATT_ICON,
          warningsToLog, commandId);
      if (icon == null) {
        continue;
      }


      final String disabledIcon = readOptional(configurationElement,
          ATT_DISABLEDICON);
      final String hoverIcon = readOptional(configurationElement,
          ATT_HOVERICON);


      final URL iconURL = BundleUtility.find(configurationElement
          .getNamespace(), icon);
      commandImageManager.bind(commandId,
          CommandImageManager.TYPE_DEFAULT, style, iconURL);
      if (disabledIcon != null) {
        final URL disabledIconURL = BundleUtility.find(
            configurationElement.getNamespace(), disabledIcon);
        commandImageManager.bind(commandId,
            CommandImageManager.TYPE_DISABLED, style,
            disabledIconURL);
      }
      if (hoverIcon != null) {
        final URL hoverIconURL = BundleUtility.find(
            configurationElement.getNamespace(), hoverIcon);
        commandImageManager.bind(commandId,
            CommandImageManager.TYPE_HOVER, style, hoverIconURL);
      }
    }

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    // Sort the commands extension point based on element name.
    final IConfigurationElement[] commandImagesExtensionPoint = registry
        .getConfigurationElementsFor(EXTENSION_COMMAND_IMAGES);
    for (int i = 0; i < commandImagesExtensionPoint.length; i++) {
      final IConfigurationElement configurationElement = commandImagesExtensionPoint[i];
      final String name = configurationElement.getName();


      // Check if it is a binding definition.
      if (TAG_IMAGE.equals(name)) {
        addElementToIndexedArray(configurationElement,
            indexedConfigurationElements, INDEX_IMAGES,

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            WorkbenchMessages.CommandService_AutogeneratedCategoryDescription);


    final List warningsToLog = new ArrayList(1);


    for (int i = 0; i < configurationElementCount; i++) {
      final IConfigurationElement configurationElement = configurationElements[i];


      // Read out the category identifier.
      final String categoryId = readRequired(configurationElement,
          ATT_ID, warningsToLog, "Categories need an id"); //$NON-NLS-1$
      if (categoryId == null) {

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    }


    final List warningsToLog = new ArrayList(1);


    for (int i = 0; i < configurationElementCount; i++) {
      final IConfigurationElement configurationElement = configurationElements[i];


      // Read out the command identifier.
      final String commandId = readRequired(configurationElement, ATT_ID,
          warningsToLog, "Commands need an id"); //$NON-NLS-1$
      if (commandId == null) {
        continue;
      }


      // Read out the name.
      final String name = readRequired(configurationElement, ATT_NAME,
          warningsToLog, "Commands need a name"); //$NON-NLS-1$
      if (name == null) {
        continue;
      }


      // Read out the description.
      final String description = readOptional(configurationElement,
          ATT_DESCRIPTION);


      // Read out the category id.
      String categoryId = configurationElement
          .getAttribute(ATT_CATEGORY_ID);
      if ((categoryId == null) || (categoryId.length() == 0)) {
        categoryId = configurationElement.getAttribute(ATT_CATEGORY);
        if ((categoryId != null) && (categoryId.length() == 0)) {
          categoryId = null;
        }
      }

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    }


    int insertionIndex = 0;
    Parameter[] parameters = new Parameter[parameterElements.length];
    for (int i = 0; i < parameterElements.length; i++) {
      final IConfigurationElement parameterElement = parameterElements[i];
      // Read out the id
      final String id = readRequired(parameterElement, ATT_ID,
          warningsToLog, "Parameters need an id"); //$NON-NLS-1$
      if (id == null) {
        continue;

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