Class WorkbenchTriggerPointAdvisor

All Implemented Interfaces:
IExecutableExtension, ITriggerPointAdvisor

public class WorkbenchTriggerPointAdvisor extends Object implements ITriggerPointAdvisor, IExecutableExtension
Workbench implementation prompts the user with a dialog unless they've said that they don't want to be prompted. You may provide the certain strings to this class via method #2 of IExecutableExtension. This is provided as API so that non-SDK Eclipse applications can reuse and augment the default SDK trigger point behaviour.
See Also:
  • Field Details


      public static String PROCEED_MULTI
      The string to be used when prompting to proceed with multiple activities. Ie: "Enable the selected activities?"

      public static String PROCEED_SINGLE
      The string to be used when prompting to proceed with a single activity. Ie: "Enable the required activity?"
    • DONT_ASK

      public static String DONT_ASK
      The string to be used to label the "don't ask" button. Ie: "&Always enable activities and don't ask me again"

      public static String NO_DETAILS
      The string to be used when no activities are selected and Details are shown. Ie: "Select an activity to view its description."
  • Constructor Details

    • WorkbenchTriggerPointAdvisor

      public WorkbenchTriggerPointAdvisor()
      Create a new instance of this advisor.
  • Method Details

    • allow

      public Set<String> allow(ITriggerPoint triggerPoint, IIdentifier identifier)
      Description copied from interface: ITriggerPointAdvisor
      Answer whether the activities bound to the identifier should be enabled when triggered by the provided trigger point.
      Specified by:
      allow in interface ITriggerPointAdvisor
      triggerPoint - the trigger point to test
      identifier - the identifier to test against the trigger point
      the set of activities that should be enabled if this the contribution represented by this identifier is to be used. If this is not null, the caller can proceed with usage of the contribution provided that the collection of activities is enabled. If this is null, the caller should assume that the operation involving the contribution should be aborted. If this method returns the empty set then the operation can proceed without any changes to activity enablement state. Please note that it is the callers responsibility to ensure that the Set returned by this method is actually enabled - after setting the enabled state of the required activities the change should be verified by consulting IActivityManager.getEnabledActivityIds().
    • setInitializationData

      public void setInitializationData(IConfigurationElement config, String propertyName, Object data)
      Description copied from interface: IExecutableExtension
      This method is called by the implementation of the method IConfigurationElement.createExecutableExtension on a newly constructed extension, passing it its relevant configuration information. Most executable extensions only make use of the first two call arguments.

      Regular executable extensions specify their Java implementation class name as an attribute of the configuration element for the extension. For example

           <action run="com.example.BaseAction"/>

      In the above example, this method would be called with a reference to the <action> element (first argument), and "run" as the name of the attribute that defined this executable extension (second argument).

      The last parameter is for the specific use of extension adapters and is typically not used by regular executable extensions.

      There are two supported ways of associating additional adapter-specific data with the configuration in a way that is transparent to the extension point implementor:

      (1) by specifying adapter data as part of the implementation class attribute value. The Java class name can be followed by a ":" separator, followed by any adapter data in string form. For example, if the extension point specifies an attribute "run" to contain the name of the extension implementation, an adapter can be configured as

           <action run="com.example.ExternalAdapter:./cmds/util.exe -opt 3"/>

      (2) by converting the attribute used to specify the executable extension to a child element of the original configuration element, and specifying the adapter data in the form of xml markup. Using this form, the example above would become

               <run class="">
                   <parameter name="exec" value="./cmds/util.exe"/>
                   <parameter name="opt"  value="3"/>

      Form (2) will typically only be used for extension points that anticipate the majority of extensions configured into it will in fact be in the form of adapters.

      In either case, the specified adapter class is instantiated using its 0-argument public constructor. The adapter data is passed as the last argument of this method. The data argument is defined as Object. It can have the following values:

      • null, if no adapter data was supplied
      • in case (1), the initialization data string is passed as a String
      • in case (2), the initialization data is passed as a Hashtable containing the actual parameter names and values (both Strings)
      Specified by:
      setInitializationData in interface IExecutableExtension
      config - the configuration element used to trigger this execution. It can be queried by the executable extension for specific configuration properties
      propertyName - the name of an attribute of the configuration element used on the createExecutableExtension(String) call. This argument can be used in the cases where a single configuration element is used to define multiple executable extensions.
      data - adapter data in the form of a String, a Hashtable, or null.
      See Also:
    • computeEnablement

      public boolean computeEnablement(IActivityManager activityManager, IIdentifier identifier)
      This implementation of ITriggerPointAdvisor.computeEnablement(IActivityManager, IIdentifier) calls doComputeEnablement(IActivityManager, IIdentifier, boolean) with a boolean argument of false. Subclasses that wish to disable identifiers if there is at least one disabled expression-based activity should override this method and call doComputeEnablement(IActivityManager, IIdentifier, boolean) with a boolean argument of true. Subclasses may override.
      Specified by:
      computeEnablement in interface ITriggerPointAdvisor
      activityManager - the activity manager
      identifier - the identifier to update
      true if this identifier should be enabled, false otherwise
      See Also:
    • doComputeEnablement

      protected boolean doComputeEnablement(IActivityManager activityManager, IIdentifier identifier, boolean disabledExpressionActivitiesTakePrecedence)
      Helper method for determining whether an identifier should be enabled. Returns true if there is no applicable activity for the given identifier. Otherwise, if the boolean argument disabledExpressionActivitiesTakePrecedence is false, returns true if any of the applicable activities is enabled. If the boolean argument is true, this method returns false if there is at least one disabled expression-based activity; and it returns true if there are no disabled expression-based activities and there is at least one applicable activity that is enabled.
      activityManager - the activity manager
      identifier - the identifier to update
      disabledExpressionActivitiesTakePrecedence - see method description
      true if this identifier should be enabled, false otherwise