| /******************************************************************************* |
| * Copyright (c) 2000, 2006 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 DynamicAttributeProperty extends ExceptionAttribute { |
| |
| protected static final String N_A= "N/A"; //$NON-NLS-1$ |
| private final Object fParent; |
| private final String fName; |
| |
| private Object fViewerElement; |
| private String fLabel= "<unknown>"; |
| |
| public DynamicAttributeProperty(Object parentAttribute, String name) { |
| fParent= parentAttribute; |
| fName= name; |
| } |
| |
| public Object getParent() { |
| return fParent; |
| } |
| |
| public Object[] getChildren() { |
| return EMPTY; |
| } |
| |
| public void setViewerElement(Object viewerAttribute) { |
| if (fViewerElement == viewerAttribute) |
| return; |
| |
| fViewerElement= viewerAttribute; |
| fException= null; |
| Object trayObject= ASTView.unwrapAttribute(fParent); |
| StringBuffer buf= new StringBuffer(fName); |
| if (viewerAttribute != null) { |
| Object viewerObject= ASTView.unwrapAttribute(viewerAttribute); |
| try { |
| String queryResult= executeQuery(viewerObject, trayObject); |
| buf.append(queryResult); |
| } catch (RuntimeException e) { |
| fException= e; |
| buf.append(e.getClass().getName()); |
| buf.append(" for \""); //$NON-NLS-1$ |
| if (viewerObject == null) |
| buf.append("null"); //$NON-NLS-1$ |
| else |
| buf.append('"').append(objectToString(viewerObject)); |
| buf.append("\" and "); //$NON-NLS-1$ |
| buf.append(objectToString(trayObject)).append('"'); |
| } |
| } else { |
| buf.append(N_A); |
| } |
| fLabel= buf.toString(); |
| } |
| |
| private String objectToString(Object object) { |
| if (object instanceof IBinding) { |
| return ((IBinding) object).getKey(); |
| } else { |
| return String.valueOf(object); |
| } |
| } |
| |
| /** |
| * Executes this dynamic attribute property's query in a protected environment. |
| * A {@link RuntimeException} thrown by this method is made available via |
| * {@link #getException()}. |
| * |
| * @param viewerObject the object of the element selected in the AST viewer, or <code>null</code> iff none |
| * @param trayObject the object of the element selected in the comparison tray, or <code>null</code> iff none |
| * @return this property's result |
| */ |
| protected abstract String executeQuery(Object viewerObject, Object trayObject); |
| |
| public String getLabel() { |
| return fLabel; |
| } |
| |
| public Image getImage() { |
| return null; |
| } |
| } |