| /******************************************************************************* |
| * Copyright (c) 2000, 2003 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Common Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/cpl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.debug.internal.core.variables; |
| |
| |
| import java.util.SortedMap; |
| import java.util.TreeMap; |
| |
| import org.eclipse.core.runtime.IConfigurationElement; |
| import org.eclipse.core.runtime.IExtension; |
| import org.eclipse.core.runtime.IExtensionPoint; |
| import org.eclipse.core.runtime.IPluginRegistry; |
| import org.eclipse.core.runtime.IStatus; |
| import org.eclipse.core.runtime.Platform; |
| import org.eclipse.core.runtime.Status; |
| import org.eclipse.debug.core.DebugPlugin; |
| import org.eclipse.debug.core.variables.IContextLaunchVariable; |
| |
| /** |
| * Registry for context launch variables. |
| * |
| * @since 3.0 |
| */ |
| public class ContextLaunchVariableRegistry { |
| // Format of the variable extension points |
| // <extension point="org.eclipse.debug.ui.launchConfigurationVariables> |
| // <variable |
| // tag={string} |
| // description={string} |
| // componentClass={string:IVariableComponent} |
| // expanderClass={string:IVariableExpander}> |
| // </variable> |
| // </extension> |
| // |
| |
| /** |
| * Element and attribute tags of a variable extension. |
| */ |
| protected static final String TAG_VARIABLE = "variable"; //$NON-NLS-1$ |
| protected static final String TAG_NAME = "name"; //$NON-NLS-1$ |
| protected static final String TAG_DESCRIPTION = "description"; //$NON-NLS-1$ |
| protected static final String TAG_EXPANDER_CLASS = "expanderClass"; //$NON-NLS-1$ |
| |
| /** |
| * Sorted map of variables where the key is the variable tag |
| * and the value is the corresponding variable. |
| */ |
| private SortedMap variables; |
| |
| /** |
| * The extension point id to read the variables from |
| */ |
| protected String extensionPointId; |
| |
| public ContextLaunchVariableRegistry() { |
| this(DebugPlugin.EXTENSION_POINT_CONTEXT_LAUNCH_VARIABLES); |
| } |
| |
| /** |
| * Creates a new registry and loads the variables. |
| */ |
| protected ContextLaunchVariableRegistry(String extensionPointId) { |
| this.extensionPointId = extensionPointId; |
| loadVariables(); |
| } |
| |
| /** |
| * Returns the variable for the specified tag, or |
| * <code>null</code> if none found. |
| */ |
| private final IContextLaunchVariable findVariable(String tag) { |
| return (IContextLaunchVariable) variables.get(tag); |
| } |
| |
| /** |
| * Returns the number of variables in the registry. |
| */ |
| private final int getVariableCount() { |
| return variables.size(); |
| } |
| |
| /** |
| * Returns the variable with the given name or <code>null</code> |
| * if no such variable exists. If multiple variables with the given name have |
| * been added to this registry, returns the most recently added variable |
| * with that name. |
| * |
| * @param name the name of the variable |
| * @return the launch configuration variable with the given name or |
| * <code>null</code> if no such variable exists. |
| */ |
| public IContextLaunchVariable getVariable(String tag) { |
| return findVariable(tag); |
| } |
| |
| /** |
| * Returns all the context variables in the registry. |
| * |
| * @return the variables in this registry |
| */ |
| public IContextLaunchVariable[] getVariables() { |
| IContextLaunchVariable[] results = new ContextLaunchVariable[getVariableCount()]; |
| variables.values().toArray(results); |
| return results; |
| } |
| |
| /** |
| * Load the available variables |
| */ |
| private void loadVariables() { |
| variables = new TreeMap(); |
| IPluginRegistry registry = Platform.getPluginRegistry(); |
| IExtensionPoint point = registry.getExtensionPoint(DebugPlugin.getUniqueIdentifier(), extensionPointId); |
| if (point != null) { |
| IExtension[] extensions = point.getExtensions(); |
| for (int i = 0; i < extensions.length; i++) { |
| IConfigurationElement[] elements = extensions[i].getConfigurationElements(); |
| for (int j = 0; j < elements.length; j++) { |
| IConfigurationElement element = elements[j]; |
| if (element.getName().equals(TAG_VARIABLE)) { |
| String tag = element.getAttribute(TAG_NAME); |
| String description = element.getAttribute(TAG_DESCRIPTION); |
| String className = element.getAttribute(TAG_EXPANDER_CLASS); |
| |
| boolean valid = true; |
| if (tag == null || tag.length() == 0) { |
| valid = false; |
| DebugPlugin.log(new Status(IStatus.ERROR, DebugPlugin.getUniqueIdentifier(), IStatus.ERROR, "Missing tag attribute value for variable element.", null)); //$NON-NLS-1$ |
| } |
| if (description == null || description.length() == 0) { |
| valid = false; |
| DebugPlugin.log(new Status(IStatus.ERROR, DebugPlugin.getUniqueIdentifier(), IStatus.ERROR, "Missing description attribute value for variable element.", null)); //$NON-NLS-1$ |
| } |
| if (className == null || className.length() == 0) { |
| valid = false; |
| DebugPlugin.log(new Status(IStatus.ERROR, DebugPlugin.getUniqueIdentifier(), IStatus.ERROR, "Missing expander class attribute value for variable element.", null)); //$NON-NLS-1$ |
| } |
| |
| if (valid) |
| variables.put(tag, newVariable(tag, description, element)); |
| } |
| } |
| } |
| } |
| } |
| |
| /** |
| * Creates a new variable from the specified information. |
| */ |
| private IContextLaunchVariable newVariable(String tag, String description, IConfigurationElement element) { |
| return new ContextLaunchVariable(tag, description, element); |
| } |
| |
| } |