Bug 80332 - logical structure factories

1 files changed, 70 insertions, 0 deletions

diff --git a/org.eclipse.debug.core/core/org/eclipse/debug/internal/core/LogicalStructureProvider.java b/org.eclipse.debug.core/core/org/eclipse/debug/internal/core/LogicalStructureProvider.java
new file mode 100644
index 000000000..e7f3dc52d
--- /dev/null
+++ b/org.eclipse.debug.core/core/org/eclipse/debug/internal/core/LogicalStructureProvider.java
@@ -0,0 +1,70 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2004 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 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
+ */
+public class LogicalStructureProvider {
+
+	private IConfigurationElement fConfigurationElement;
+	
+	private String fModelIdentifier;
+
+	private ILogicalStructureProvider fDelegate;
+
+	public LogicalStructureProvider(IConfigurationElement element) throws CoreException {
+		fConfigurationElement= element;
+		fModelIdentifier= fConfigurationElement.getAttribute("modelIdentifier"); //$NON-NLS-1$
+		if (fModelIdentifier == null) {
+			throw new CoreException(new Status(IStatus.ERROR, DebugPlugin.getUniqueIdentifier(), DebugPlugin.INTERNAL_ERROR, DebugCoreMessages.getString("LogicalStructureProvider.0"), null)); //$NON-NLS-1$
+		}
+		String className= fConfigurationElement.getAttribute("class"); //$NON-NLS-1$
+		if (className == null) {
+			throw new CoreException(new Status(IStatus.ERROR, DebugPlugin.getUniqueIdentifier(), DebugPlugin.INTERNAL_ERROR, DebugCoreMessages.getString("LogicalStructureProvider.1"), null)); //$NON-NLS-1$
+		}
+	}
+	
+	/**
+	 * Return the logical structure type able to provide a logical structure for
+	 * the given value.
+	 */
+	public ILogicalStructureType[] getLogicalStructures(IValue value) {
+		if (fModelIdentifier.equals(value.getModelIdentifier())) {
+			return getDelegate().getLogicalStructureTypes(value);
+		}
+		return new ILogicalStructureType[0];
+	}
+
+	/**
+	 * Return the ILogicalStructureProvider for this extension.
+	 */
+	protected ILogicalStructureProvider getDelegate() {
+		if (fDelegate == null) {
+			try {
+				fDelegate = (ILogicalStructureProvider) fConfigurationElement.createExecutableExtension("class"); //$NON-NLS-1$
+			} catch (CoreException e) {
+				DebugPlugin.log(e);
+			}
+		}
+		return fDelegate;
+	}
+
+}