| 1 | /******************************************************************************* |
|---|---|
| 2 | * Copyright (c) 2000, 2006 IBM Corporation and others. |
| 3 | * |
| 4 | * This program and the accompanying materials |
| 5 | * are made available under the terms of the Eclipse Public License 2.0 |
| 6 | * which accompanies this distribution, and is available at |
| 7 | * https://www.eclipse.org/legal/epl-2.0/ |
| 8 | * |
| 9 | * SPDX-License-Identifier: EPL-2.0 |
| 10 | * |
| 11 | * Contributors: |
| 12 | * IBM Corporation - initial API and implementation |
| 13 | *******************************************************************************/ |
| 14 | |
| 15 | package org.eclipse.jdt.astview.views; |
| 16 | |
| 17 | import org.eclipse.jdt.core.dom.IBinding; |
| 18 | |
| 19 | import org.eclipse.swt.graphics.Image; |
| 20 | |
| 21 | |
| 22 | public abstract class DynamicBindingProperty extends ExceptionAttribute { |
| 23 | |
| 24 | protected static final String N_A= "N/A"; //$NON-NLS-1$ |
| 25 | private final Binding fParent; |
| 26 | |
| 27 | private Binding fViewerElement; |
| 28 | private String fLabel= "<unknown>"; |
| 29 | |
| 30 | public DynamicBindingProperty(Binding parent) { |
| 31 | fParent= parent; |
| 32 | } |
| 33 | |
| 34 | @Override |
| 35 | public Object getParent() { |
| 36 | return fParent; |
| 37 | } |
| 38 | |
| 39 | @Override |
| 40 | public Object[] getChildren() { |
| 41 | return EMPTY; |
| 42 | } |
| 43 | |
| 44 | public void setViewerElement(Binding viewerElement) { |
| 45 | if (fViewerElement == viewerElement) |
| 46 | return; |
| 47 | |
| 48 | fViewerElement= viewerElement; |
| 49 | fException= null; |
| 50 | IBinding trayBinding= fParent.getBinding(); |
| 51 | StringBuilder buf= new StringBuilder(getName()); |
| 52 | if (viewerElement != null) { |
| 53 | IBinding viewerBinding= viewerElement.getBinding(); |
| 54 | try { |
| 55 | String queryResult= executeQuery(viewerBinding, trayBinding); |
| 56 | buf.append(queryResult); |
| 57 | } catch (RuntimeException e) { |
| 58 | fException= e; |
| 59 | buf.append(e.getClass().getName()); |
| 60 | buf.append(" for \""); //$NON-NLS-1$ |
| 61 | if (viewerBinding == null) |
| 62 | buf.append("null"); //$NON-NLS-1$ |
| 63 | else |
| 64 | buf.append('"').append(viewerBinding.getKey()); |
| 65 | buf.append("\" and "); //$NON-NLS-1$ |
| 66 | buf.append(trayBinding.getKey()).append('"'); |
| 67 | } |
| 68 | } else { |
| 69 | buf.append(N_A); |
| 70 | } |
| 71 | fLabel= buf.toString(); |
| 72 | } |
| 73 | |
| 74 | /** |
| 75 | * Executes this dynamic binding property's query in a protected environment. |
| 76 | * A {@link RuntimeException} thrown by this method is made available via |
| 77 | * {@link #getException()}. |
| 78 | * |
| 79 | * @param viewerBinding the binding of the element selected in the AST viewer, or <code>null</code> iff none |
| 80 | * @param trayBinding the binding of the element selected in the comparison tray, or <code>null</code> iff none |
| 81 | * @return this property's result |
| 82 | */ |
| 83 | protected abstract String executeQuery(IBinding viewerBinding, IBinding trayBinding); |
| 84 | |
| 85 | /** |
| 86 | * @return a description of the dynamic property |
| 87 | */ |
| 88 | protected abstract String getName(); |
| 89 | |
| 90 | @Override |
| 91 | public String getLabel() { |
| 92 | return fLabel; |
| 93 | } |
| 94 | |
| 95 | @Override |
| 96 | public Image getImage() { |
| 97 | return null; |
| 98 | } |
| 99 | } |
| 100 |
Members