1 files changed, 120 insertions, 0 deletions
diff --git a/org.eclipse.debug.core/core/org/eclipse/debug/internal/core/ContributedDelegate.java b/org.eclipse.debug.core/core/org/eclipse/debug/internal/core/ContributedDelegate.java
new file mode 100644
index 000000000..260143578
--- /dev/null
+++ b/org.eclipse.debug.core/core/org/eclipse/debug/internal/core/ContributedDelegate.java
@@ -0,0 +1,120 @@
+/*******************************************************************************
+ * 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;
+
+import java.text.MessageFormat;
+import java.util.HashSet;
+import java.util.Set;
+import java.util.StringTokenizer;
+
+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.model.ILaunchConfigurationDelegate;
+
+/**
+ * A placeholder for a launch delegate contributed for a launch mode for an
+ * existing launch configuration type.
+ */
+public class ContributedDelegate {
+
+	/**
+	 * The configuration element of the extension.
+	 */
+	private IConfigurationElement fElement;
+	
+	/**
+	 * Modes this delegate supports.
+	 */
+	private Set fModes;
+	
+	/**
+	 * Delegate, or <code>null</code> if not yet instantiated.
+	 */
+	private ILaunchConfigurationDelegate fDelegate;
+	
+	/**
+	 * Constructs a new contributed delegate on the
+	 * given configuration element.
+	 * 
+	 * @param element configuration element
+	 */
+	protected ContributedDelegate(IConfigurationElement element) {
+		setConfigurationElement(element);
+	}
+	
+	/**
+	 * Sets this delegate's configuration element.
+	 * 
+	 * @param element this delegate's configuration element
+	 */
+	private void setConfigurationElement(IConfigurationElement element) {
+		fElement = element;
+	}
+	
+	/**
+	 * Returns this delegate's configuration element.
+	 * 
+	 * @return this delegate's configuration element
+	 */
+	protected IConfigurationElement getConfigurationElement() {
+		return fElement;
+	}	
+	
+	/**
+	 * Returns the set of modes specified in the configuration data.
+	 * 
+	 * @return the set of modes specified in the configuration data
+	 */
+	protected Set getModes() {
+		if (fModes == null) {
+			String modes= getConfigurationElement().getAttribute("modes"); //$NON-NLS-1$
+			if (modes == null) {
+				return new HashSet(0);
+			}
+			StringTokenizer tokenizer= new StringTokenizer(modes, ","); //$NON-NLS-1$
+			fModes = new HashSet(tokenizer.countTokens());
+			while (tokenizer.hasMoreTokens()) {
+				fModes.add(tokenizer.nextToken().trim());
+			}
+		}
+		return fModes;
+	}
+	
+	/**
+	 * Returns the type identifier of launch configuration type this delegate is
+	 * contributed to.
+	 */
+	protected String getLaunchConfigurationType() {
+		return getConfigurationElement().getAttribute("type"); //$NON-NLS-1$
+	}
+	
+	protected ILaunchConfigurationDelegate getDelegate() throws CoreException {
+		if (fDelegate == null) {
+			Object object = getConfigurationElement().createExecutableExtension("delegate"); //$NON-NLS-1$
+			if (object instanceof ILaunchConfigurationDelegate) {
+				fDelegate = (ILaunchConfigurationDelegate)object;
+			} else {
+				throw new CoreException(new Status(IStatus.ERROR, DebugPlugin.getUniqueIdentifier(), DebugPlugin.INTERNAL_ERROR, MessageFormat.format(DebugCoreMessages.getString("LaunchConfigurationType.Launch_delegate_for_{0}_does_not_implement_required_interface_ILaunchConfigurationDelegate._1"), new String[]{getIdentifier()}), null)); //$NON-NLS-1$
+			}		
+		}
+		return fDelegate;
+	}
+	
+	/**
+	 * Returns the identifier of this extension point.
+	 */
+	protected String getIdentifier() {
+		return getConfigurationElement().getAttribute("id"); //$NON-NLS-1$
+	}	
+}