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diff --git a/case-study/jdt-after/ui/org/eclipse/jdt/internal/ui/propertiesfileeditor/PropertiesFileDocumentSetupParticipant.java b/case-study/jdt-after/ui/org/eclipse/jdt/internal/ui/propertiesfileeditor/PropertiesFileDocumentSetupParticipant.java
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+/*******************************************************************************
+ * Copyright (c) 2000, 2008 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.jdt.internal.ui.propertiesfileeditor;
+
+import org.eclipse.core.filebuffers.IDocumentSetupParticipant;
+
+import org.eclipse.jface.text.IDocument;
+import org.eclipse.jface.text.IDocumentExtension3;
+import org.eclipse.jface.text.IDocumentPartitioner;
+import org.eclipse.jface.text.rules.FastPartitioner;
+
+/**
+ * The document setup participant for a properties file document.
+ *
+ * @since 3.1
+ */
+public class PropertiesFileDocumentSetupParticipant  implements IDocumentSetupParticipant {
+
+	/*
+	 * @see org.eclipse.core.filebuffers.IDocumentSetupParticipant#setup(org.eclipse.jface.text.IDocument)
+	 */
+	public void setup(IDocument document) {
+		setupDocument(document);
+	}
+
+	/**
+	 * @param document the document
+	 * @see org.eclipse.core.filebuffers.IDocumentSetupParticipant#setup(org.eclipse.jface.text.IDocument)
+	 */
+	public static void setupDocument(IDocument document) {
+		IDocumentPartitioner partitioner= createDocumentPartitioner();
+		if (document instanceof IDocumentExtension3) {
+			IDocumentExtension3 extension3= (IDocumentExtension3) document;
+			extension3.setDocumentPartitioner(IPropertiesFilePartitions.PROPERTIES_FILE_PARTITIONING, partitioner);
+		} else {
+			document.setDocumentPartitioner(partitioner);
+		}
+		partitioner.connect(document);
+	}
+
+	/**
+	 * Factory method for creating a properties file document specific document
+	 * partitioner.
+	 *
+	 * @return a newly created properties file document partitioner
+	 */
+	private static IDocumentPartitioner createDocumentPartitioner() {
+		return new FastPartitioner(new PropertiesFilePartitionScanner(), IPropertiesFilePartitions.PARTITIONS);
+	}
+}