From f318b5e6a3e5c5ab9d026bc52ccea2e8625c3417 Mon Sep 17 00:00:00 2001
From: akosyakov <anton.kosyakov@itemis.de>
Date: Tue, 14 Apr 2015 15:47:46 +0200
Subject: [PATCH] [idea][performance] Only relink a model on the modification
 counter change, reparsing should be triggered by changing a corresponding
 xtext file

Change-Id: I716eefbbe1166569179564c50335d4e2d61808e3
Signed-off-by: akosyakov <anton.kosyakov@itemis.de>
---
 .../org/eclipse/xtext/resource/XtextResource.java | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/plugins/org.eclipse.xtext/src/org/eclipse/xtext/resource/XtextResource.java b/plugins/org.eclipse.xtext/src/org/eclipse/xtext/resource/XtextResource.java
index a75f9cbbb..f3d50185b 100644
--- a/plugins/org.eclipse.xtext/src/org/eclipse/xtext/resource/XtextResource.java
+++ b/plugins/org.eclipse.xtext/src/org/eclipse/xtext/resource/XtextResource.java
@@ -226,6 +226,21 @@ public class XtextResource extends ResourceImpl {
 		super.doUnload();
 		parseResult = null;
 	}
+	
+	/**
+	 * @since 2.9
+	 */
+	public void relink() {
+		if (!isLoaded()) {
+			throw new IllegalStateException("You can't update an unloaded resource.");
+		}
+		try {
+			isUpdating = true;
+			updateInternalState(parseResult, parseResult);
+		} finally {
+			isUpdating = false;
+		}
+	}
 
 	public void update(int offset, int replacedTextLength, String newText) {
 		if (!isLoaded()) {