| /******************************************************************************* |
| * Copyright (c) 2000, 2013 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.debug.core.model; |
| |
| |
| /** |
| * An expression is a snippet of code that can be evaluated |
| * to produce a value. When and how an expression is evaluated |
| * is implementation specific. The context/binding required to |
| * evaluate an expression varies by debug model, and by |
| * user intent. Furthermore, an expression may need to be evaluated |
| * at a specific location in a program (for example, at a |
| * breakpoint/line where certain variables referenced in the |
| * expression are visible/allocated). A user may want to |
| * evaluate an expression once to produce a value that can |
| * be inspected iteratively, or they may wish to evaluate an |
| * expression iteratively producing new values each time |
| * (i.e. as in a watch list). |
| * <p> |
| * Clients are intended to implement this interface. |
| * </p> |
| * @since 2.0 |
| */ |
| public interface IExpression extends IDebugElement { |
| |
| /** |
| * Returns this expression's snippet of code. |
| * |
| * @return the expression |
| */ |
| String getExpressionText(); |
| |
| /** |
| * Returns the current value of this expression or |
| * <code>null</code> if this expression does not |
| * currently have a value. |
| * |
| * @return value or <code>null</code> |
| */ |
| IValue getValue(); |
| |
| /** |
| * Returns the debug target this expression is associated |
| * with, or <code>null</code> if this expression is not |
| * associated with a debug target. |
| * |
| * @return debug target or <code>null</code> |
| * @see IDebugElement#getDebugTarget() |
| */ |
| @Override IDebugTarget getDebugTarget(); |
| |
| /** |
| * Notifies this expression that it has been removed |
| * from the expression manager. Any required clean up |
| * is be performed such that this expression can be |
| * garbage collected. |
| */ |
| void dispose(); |
| } |