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.

This interface is not intended to be implemented by clients.

Since:

2.0

See Also:

IExpression, IExpressionListener

Method Summary

void	addExpression(IExpression expression) Adds the given expression to the collection of registered expressions in the workspace and notifies all registered listeners.
void	addExpressionListener(IExpressionListener listener) Adds the given listener to the collection of registered expression listeners.
IExpression[]	getExpressions() Returns a collection of all registered expressions, possibly empty.
IExpression[]	getExpressions(String modelIdentifier) Returns a collection of all expressions registered for the given debug model,possibly empty.
boolean	hasExpressions() Returns whether there are any registered expressions
void	removeExpression(IExpression expression) Removes the given expression from the expression manager, and notifies all registered listeners.
void	removeExpressionListener(IExpressionListener listener) Removes the given listener from the collection of registered expression listeners.

Method Detail

addExpression

public 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

getExpressions

public IExpression[] getExpressions()

Returns a collection of all registered expressions, possibly empty.

Returns:

an array of expressions

hasExpressions

public boolean hasExpressions()

Returns whether there are any registered expressions

Returns:

whether there are any registered expressions

getExpressions

public 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

public 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

addExpressionListener

public 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

public 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