Package org.eclipse.debug.core

Interface IExpressionManager

  • public interface IExpressionManager
    The expression manager manages the collection of registered expressions in the workspace. An expression is a snippet of code that can be evaluated to produce a value. Expression creation and evaluation are client responsibilities.

    Clients interested in expression change notification may register with the expression manager - see IExpressionListener and IExpressionsListener.

    Since:
    2.0
    See Also:
    IExpression, IExpressionListener, IExpressionsListener
    Restriction:
    This interface is not intended to be implemented by clients.
    Restriction:
    This interface is not intended to be extended by clients.

    • Method Detail

      • addExpression

        void addExpression​(IExpression expression)
        Adds the given expression to the collection of registered expressions in the workspace and notifies all registered listeners. This has no effect if the given expression is already registered.
        Parameters:
        expression - the expression to add

      • addExpressions

        void addExpressions​(IExpression[] expressions)
        Adds the given expressions to the collection of registered expressions in the workspace and notifies all registered listeners. Has no effect on expressions already registered.
        Parameters:
        expressions - the expressions to add
        Since:
        2.1

      • newWatchExpression

        IWatchExpression newWatchExpression​(String expressionText)
        Creates and returns a new watch expression with the given text. The returned expression is not added to this manager.
        Parameters:
        expressionText - the text for the new expression
        Returns:
        new watch expression
        Since:
        3.0

      • getExpressions

        IExpression[] getExpressions()
        Returns a collection of all registered expressions, possibly empty.
        Returns:
        an array of expressions

      • hasExpressions

        boolean hasExpressions()
        Returns whether there are any registered expressions
        Returns:
        whether there are any registered expressions

      • getExpressions

        IExpression[] getExpressions​(String modelIdentifier)
        Returns a collection of all expressions registered for the given debug model,possibly empty.
        Parameters:
        modelIdentifier - identifier of a debug model plug-in
        Returns:
        an array of expressions

      • removeExpression

        void removeExpression​(IExpression expression)
        Removes the given expression from the expression manager, and notifies all registered listeners. Has no effect if the given expression is not currently registered.
        Parameters:
        expression - the expression to remove

      • removeExpressions

        void removeExpressions​(IExpression[] expressions)
        Removes the given expressions from the collection of registered expressions in the workspace and notifies all registered listeners. Has no effect on expressions not already registered.
        Parameters:
        expressions - the expressions to remove
        Since:
        2.1

      • addExpressionListener

        void addExpressionListener​(IExpressionListener listener)
        Adds the given listener to the collection of registered expression listeners. Has no effect if an identical listener is already registered.
        Parameters:
        listener - the listener to add

      • removeExpressionListener

        void removeExpressionListener​(IExpressionListener listener)
        Removes the given listener from the collection of registered expression listeners. Has no effect if an identical listener is not already registered.
        Parameters:
        listener - the listener to remove

      • addExpressionListener

        void addExpressionListener​(IExpressionsListener listener)
        Adds the given listener to the collection of registered expression listeners. Has no effect if an identical listener is already registered.
        Parameters:
        listener - the listener to add
        Since:
        2.1

      • removeExpressionListener

        void removeExpressionListener​(IExpressionsListener listener)
        Removes the given listener from the collection of registered expression listeners. Has no effect if an identical listener is not already registered.
        Parameters:
        listener - the listener to remove
        Since:
        2.1

      • newWatchExpressionDelegate

        IWatchExpressionDelegate newWatchExpressionDelegate​(String id)
        Returns a new watch expression delegate for the given debug model or null if no delegate is available.
        Parameters:
        id - the unique identifier of a debug model for which a watch expression delegate has been contributed
        Returns:
        a watch expression delegate associated with the given model or null if none
        Since:
        3.0
        See Also:
        IWatchExpressionDelegate

      • hasWatchExpressionDelegate

        boolean hasWatchExpressionDelegate​(String id)
        Returns whether a watch expression delegate has been contributed for the given debug model.
        Parameters:
        id - the unique identifier of a debug model
        Returns:
        whether a watch expression delegate has been contributed for the given debug model
        Since:
        3.1
        See Also:
        IWatchExpressionDelegate