| /******************************************************************************* |
| * Copyright (c) 2000, 2005 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.jdt.astview.views; |
| |
| import org.eclipse.jdt.core.dom.IBinding; |
| |
| import org.eclipse.swt.graphics.Image; |
| |
| |
| public abstract class DynamicBindingProperty extends ExceptionAttribute { |
| |
| protected static final String N_A= "N/A"; //$NON-NLS-1$ |
| private final Binding fParent; |
| |
| private Binding fViewerElement; |
| private String fLabel; |
| |
| public DynamicBindingProperty(Binding parent) { |
| fParent= parent; |
| } |
| |
| public Object getParent() { |
| return fParent; |
| } |
| |
| public Object[] getChildren() { |
| return EMPTY; |
| } |
| |
| public void setViewerElement(Binding viewerElement) { |
| if (fViewerElement == viewerElement) |
| return; |
| |
| fViewerElement= viewerElement; |
| fException= null; |
| IBinding trayBinding= fParent.getBinding(); |
| StringBuffer buf= new StringBuffer(getName()); |
| if (viewerElement != null) { |
| IBinding viewerBinding= viewerElement.getBinding(); |
| try { |
| String queryResult= executeQuery(viewerBinding, trayBinding); |
| buf.append(queryResult); |
| } catch (RuntimeException e) { |
| fException= e; |
| buf.append(e.getClass().getName()); |
| buf.append(" for \""); //$NON-NLS-1$ |
| if (viewerBinding == null) |
| buf.append("null"); //$NON-NLS-1$ |
| else |
| buf.append('"').append(viewerBinding.getKey()); |
| buf.append("\" and "); //$NON-NLS-1$ |
| buf.append(trayBinding.getKey()).append('"'); |
| } |
| } else { |
| buf.append(N_A); |
| } |
| fLabel= buf.toString(); |
| } |
| |
| /** |
| * Executes this dynamic binding property's query in a protected environment. |
| * A {@link RuntimeException} thrown by this method is made available via |
| * {@link #getException()}. |
| * |
| * @param viewerBinding the binding of the element selected in the AST viewer, or <code>null</code> iff none |
| * @param trayBinding the binding of the element selected in the comparison tray, or <code>null</code> iff none |
| * @return this property's result |
| */ |
| protected abstract String executeQuery(IBinding viewerBinding, IBinding trayBinding); |
| |
| /** |
| * @return a description of the dynamic property |
| */ |
| protected abstract String getName(); |
| |
| public String getLabel() { |
| return fLabel; |
| } |
| |
| public Image getImage() { |
| return null; |
| } |
| } |