| /******************************************************************************* |
| * Copyright (c) 2000, 2011 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.debug.internal.core; |
| |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.core.runtime.IConfigurationElement; |
| import org.eclipse.core.runtime.IStatus; |
| import org.eclipse.core.runtime.Status; |
| import org.eclipse.debug.core.DebugPlugin; |
| import org.eclipse.debug.core.ILogicalStructureProvider; |
| import org.eclipse.debug.core.ILogicalStructureType; |
| import org.eclipse.debug.core.model.IValue; |
| |
| /** |
| * Manage logical structure provider extensions |
| * |
| * @see IConfigurationElementConstants |
| */ |
| public class LogicalStructureProvider { |
| |
| private IConfigurationElement fConfigurationElement; |
| |
| private String fModelIdentifier; |
| |
| private ILogicalStructureProvider fDelegate; |
| |
| public LogicalStructureProvider(IConfigurationElement element) throws CoreException { |
| fConfigurationElement= element; |
| fModelIdentifier= fConfigurationElement.getAttribute(IConfigurationElementConstants.MODEL_IDENTIFIER); |
| if (fModelIdentifier == null) { |
| throw new CoreException(new Status(IStatus.ERROR, DebugPlugin.getUniqueIdentifier(), DebugPlugin.ERROR, DebugCoreMessages.LogicalStructureProvider_0, null)); |
| } |
| String className= fConfigurationElement.getAttribute(IConfigurationElementConstants.CLASS); |
| if (className == null) { |
| throw new CoreException(new Status(IStatus.ERROR, DebugPlugin.getUniqueIdentifier(), DebugPlugin.ERROR, DebugCoreMessages.LogicalStructureProvider_1, null)); |
| } |
| } |
| |
| /** |
| * Return the logical structure type able to provide a logical structure for |
| * the given value. |
| * |
| * @param value value for which structure types are requested |
| * @return logical structure types |
| */ |
| public ILogicalStructureType[] getLogicalStructures(IValue value) { |
| if (fModelIdentifier.equals(value.getModelIdentifier())) { |
| return getDelegate().getLogicalStructureTypes(value); |
| } |
| return new ILogicalStructureType[0]; |
| } |
| |
| /** |
| * Return the ILogicalStructureProvider for this extension. |
| * @return the {@link ILogicalStructureProvider} |
| */ |
| protected ILogicalStructureProvider getDelegate() { |
| if (fDelegate == null) { |
| try { |
| fDelegate = (ILogicalStructureProvider) fConfigurationElement.createExecutableExtension(IConfigurationElementConstants.CLASS); |
| } catch (CoreException e) { |
| DebugPlugin.log(e); |
| } |
| } |
| return fDelegate; |
| } |
| |
| } |