### Eclipse Workspace Patch 1.0
#P org.eclipse.jdt.core
Index: model/org/eclipse/jdt/internal/core/JavaModelManager.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.core/model/org/eclipse/jdt/internal/core/JavaModelManager.java,v
retrieving revision 1.395
diff -u -r1.395 JavaModelManager.java
--- model/org/eclipse/jdt/internal/core/JavaModelManager.java	25 Apr 2008 10:09:57 -0000	1.395
+++ model/org/eclipse/jdt/internal/core/JavaModelManager.java	16 May 2008 14:34:57 -0000
@@ -1726,6 +1726,27 @@
 		return this.cache.getExistingElement(element);
 	}
 
+	public HashSet getExternalWorkingCopyProjects() {
+		synchronized (this.perWorkingCopyInfos) {
+			HashSet result = null;
+			Iterator values = this.perWorkingCopyInfos.values().iterator();
+			while (values.hasNext()) {
+				Map ownerCopies = (Map) values.next();
+				Iterator workingCopies = ownerCopies.keySet().iterator();
+				while (workingCopies.hasNext()) {
+					ICompilationUnit workingCopy = (ICompilationUnit) workingCopies.next();
+					IJavaProject project = workingCopy.getJavaProject();
+					if (project.getElementName().equals(ExternalJavaProject.EXTERNAL_PROJECT_NAME)) {
+						if (result == null)
+							result = new HashSet();
+						result.add(project);
+					}
+				}
+			}
+			return result;
+		}
+	}
+	
 	/**
 	 * Get workspace eclipse preference for JavaCore plug-in.
 	 */
Index: model/org/eclipse/jdt/internal/core/DeltaProcessor.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.core/model/org/eclipse/jdt/internal/core/DeltaProcessor.java,v
retrieving revision 1.321
diff -u -r1.321 DeltaProcessor.java
--- model/org/eclipse/jdt/internal/core/DeltaProcessor.java	13 May 2008 13:02:59 -0000	1.321
+++ model/org/eclipse/jdt/internal/core/DeltaProcessor.java	16 May 2008 14:34:56 -0000
@@ -705,8 +705,22 @@
 		try {
 			if (monitor != null) monitor.beginTask("", 1); //$NON-NLS-1$
 
+			boolean hasExternalWorkingCopyProject = false;
 			for (int i = 0, length = elementsScope.length; i < length; i++) {
+				IJavaElement element = elementsScope[i];
 				this.state.addForRefresh(elementsScope[i]);
+				if (element.getElementType() == IJavaElement.JAVA_MODEL) {
+					// ensure external working copies' projects' caches are reset
+					HashSet projects = JavaModelManager.getJavaModelManager().getExternalWorkingCopyProjects();
+					if (projects != null) {
+						hasExternalWorkingCopyProject = true;
+						Iterator iterator = projects.iterator();
+						while (iterator.hasNext()) {
+							JavaProject project = (JavaProject) iterator.next();
+							project.resetCaches();
+						}
+					}
+				}
 			}
 			HashSet elementsToRefresh = this.state.removeExternalElementsToRefresh();
 			boolean hasDelta = elementsToRefresh != null && createExternalArchiveDelta(elementsToRefresh, monitor);
@@ -744,6 +758,9 @@
 				if (this.currentDelta != null) { // if delta has not been fired while creating markers
 					this.fire(this.currentDelta, DEFAULT_CHANGE_EVENT);
 				}
+			} else if (hasExternalWorkingCopyProject) {
+				// flush jar type cache
+				JavaModelManager.getJavaModelManager().resetJarTypeCache();
 			}
 		} finally {
 			this.currentDelta = null;
#P org.eclipse.jdt.core.tests.model
Index: src/org/eclipse/jdt/core/tests/model/ReconcilerTests.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.core.tests.model/src/org/eclipse/jdt/core/tests/model/ReconcilerTests.java,v
retrieving revision 1.130
diff -u -r1.130 ReconcilerTests.java
--- src/org/eclipse/jdt/core/tests/model/ReconcilerTests.java	21 Apr 2008 12:54:43 -0000	1.130
+++ src/org/eclipse/jdt/core/tests/model/ReconcilerTests.java	16 May 2008 14:34:58 -0000
@@ -1623,6 +1623,54 @@
 }
 
 /*
+ * Ensures that an error is detected after refreshing external archives used by
+ * an external working copy.
+ * (regression test for https://bugs.eclipse.org/bugs/show_bug.cgi?id=216772 )
+ */
+public void testExternal3() throws Exception {
+	try {
+		this.workingCopy.discardWorkingCopy(); // don't use the one created in setUp()
+		this.workingCopy = null;
+		this.problemRequestor =  new ProblemRequestor();
+		createJar(new String[] {
+			"p/Lib.java",
+			"package p;\n" +
+			"public class Lib {\n" +
+			"}"
+		}, getExternalResourcePath("lib.jar"));
+		IClasspathEntry[] classpath = new IClasspathEntry[] {
+			JavaCore.newLibraryEntry(getExternalJCLPath(), null, null),
+			JavaCore.newLibraryEntry(new Path(getExternalResourcePath("lib.jar")), null, null)
+		};
+		this.workingCopy = newExternalWorkingCopy("External.java", classpath, this.problemRequestor,
+			"public class External {\n"+
+			"	p.Lib field;\n"+
+			"}\n"
+		);
+		this.workingCopy.reconcile(ICompilationUnit.NO_AST, false, null/*no owner*/, null);
+	
+		createJar(new String[] {
+			"p/Lib2.java",
+			"package p;\n" +
+			"public class Lib2 {\n" +
+			"}"
+		}, getExternalResourcePath("lib.jar"));
+		getJavaModel().refreshExternalArchives(null, null);
+		this.problemRequestor.reset();
+		this.workingCopy.reconcile(ICompilationUnit.NO_AST, true/*force problem detection*/, null/*no owner*/, null);
+		assertProblems(
+			"Unexpected problems",
+			"----------\n" + 
+			"1. ERROR in / /External.java\n" + 
+			"p.Lib cannot be resolved to a type\n" + 
+			"----------\n"
+		);
+	} finally {
+		deleteExternalResource("lib.jar");
+	}
+}
+
+/*
  * Ensures that included part of prereq project are visible
  */
 public void testIncludePartOfAnotherProject1() throws CoreException {