| /******************************************************************************* |
| * Copyright (c) 2000, 2013 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.ui.stringsubstitution; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.core.runtime.IConfigurationElement; |
| import org.eclipse.core.runtime.IExtensionPoint; |
| import org.eclipse.core.runtime.Platform; |
| import org.eclipse.core.variables.IStringVariable; |
| import org.eclipse.debug.internal.ui.DebugUIPlugin; |
| import org.eclipse.debug.ui.stringsubstitution.IArgumentSelector; |
| |
| import com.ibm.icu.text.MessageFormat; |
| |
| /** |
| * Manages argument selectors (choosers) for string variables. |
| * |
| * @since 3.0 |
| */ |
| public class StringVariablePresentationManager { |
| |
| /** |
| * String variable presentation extension point identifier |
| * (value <code>"stringVariablePresentations"</code>). |
| * |
| * @since 3.0 |
| */ |
| public static final String EXTENSION_POINT_STRING_VARIABLE_PRESENTATIONS = "stringVariablePresentations"; //$NON-NLS-1$ |
| |
| // default manager |
| private static StringVariablePresentationManager fgManager; |
| |
| // extension point attributes |
| public static final String ATTR_NAME = "variableName"; //$NON-NLS-1$ |
| public static final String ATTR_ARGUMENT_SELECTOR = "argumentSelector"; //$NON-NLS-1$ |
| |
| /** |
| * Table of configuration elements for variable presentations, |
| * keyed by variable name. |
| */ |
| private Map<String, IConfigurationElement> fConfigurations; |
| |
| /** |
| * Returns the singleton string variable presentation manager. |
| * |
| * @return the singleton string variable presentation manager |
| */ |
| public static StringVariablePresentationManager getDefault() { |
| if (fgManager == null) { |
| fgManager = new StringVariablePresentationManager(); |
| } |
| return fgManager; |
| } |
| |
| /** |
| * Returns an argument selector contributed for the given |
| * variable, or <code>null</code> if none. |
| * |
| * @param variable string substitution variable |
| * @return argument selector or <code>null</code> |
| */ |
| public IArgumentSelector getArgumentSelector(IStringVariable variable) { |
| IConfigurationElement element = fConfigurations.get(variable.getName()); |
| if (element != null) { |
| try { |
| return (IArgumentSelector)element.createExecutableExtension(ATTR_ARGUMENT_SELECTOR); |
| } catch (CoreException e) { |
| DebugUIPlugin.log(e); |
| } |
| } |
| return null; |
| } |
| |
| /** |
| * Constructs the manager, loading extensions. |
| */ |
| private StringVariablePresentationManager() { |
| initialize(); |
| } |
| |
| /** |
| * Load extensions |
| */ |
| private void initialize() { |
| fConfigurations = new HashMap<>(); |
| IExtensionPoint point= Platform.getExtensionRegistry().getExtensionPoint(DebugUIPlugin.getUniqueIdentifier(), EXTENSION_POINT_STRING_VARIABLE_PRESENTATIONS); |
| IConfigurationElement elements[]= point.getConfigurationElements(); |
| for (int i = 0; i < elements.length; i++) { |
| IConfigurationElement element = elements[i]; |
| String name= element.getAttribute(ATTR_NAME); |
| if (name == null) { |
| DebugUIPlugin.logErrorMessage(MessageFormat.format("String variable presentation extension missing required 'variableName' attribute: {0}", new Object[] { element.getDeclaringExtension().getLabel() })); //$NON-NLS-1$ |
| continue; |
| } |
| fConfigurations.put(name, element); |
| } |
| } |
| |
| |
| } |