### Eclipse Workspace Patch 1.0
#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 1.97
diff -u -r1.97 ReconcilerTests.java
--- src/org/eclipse/jdt/core/tests/model/ReconcilerTests.java	11 Apr 2006 13:31:48 -0000	1.97
+++ src/org/eclipse/jdt/core/tests/model/ReconcilerTests.java	14 Apr 2006 15:28:05 -0000
@@ -11,6 +11,7 @@
 package org.eclipse.jdt.core.tests.model;
 
 
+import java.io.File;
 import java.io.IOException;
 
 import junit.framework.Test;
@@ -19,6 +20,7 @@
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.IProgressMonitor;
 import org.eclipse.core.runtime.OperationCanceledException;
+import org.eclipse.core.runtime.Path;
 import org.eclipse.jdt.core.*;
 import org.eclipse.jdt.core.compiler.CompilationParticipant;
 import org.eclipse.jdt.core.compiler.IProblem;
@@ -805,6 +807,63 @@
 		"	f2[*]: {CATEGORIES}"
 	);
 }
+/*
+ * Ensures that changing and external jar and refreshing takes the change into account
+ * (regression test for bug 
+ */
+public void testChangeExternalJar() throws CoreException, IOException {
+	IJavaProject project = getJavaProject("Reconciler");
+	String jarPath = getExternalPath() + "lib.jar";
+	try {
+		org.eclipse.jdt.core.tests.util.Util.createJar(new String[] {
+			"p/Y.java",
+			"package p;\n" +
+			"public class Y {\n" +
+			"  public void foo() {\n" +
+			"  }\n" +
+			"}"
+		}, jarPath, "1.4");
+		addLibraryEntry(project, jarPath, false);
+		
+		// force Y.class file to be cached during resolution
+		setWorkingCopyContents(
+			"package p1;\n" +
+			"public class X extends p.Y {\n" +
+			"  public void bar() {\n" +
+			"    foo();\n" +
+			"  }\n" +
+			"}");
+		this.workingCopy.reconcile(ICompilationUnit.NO_AST, false, null, null);
+		
+		// change jar and refresh
+		org.eclipse.jdt.core.tests.util.Util.createJar(new String[] {
+			"p/Y.java",
+			"package p;\n" +
+			"public class Y {\n" +
+			"  public void foo(String s) {\n" +
+			"  }\n" +
+			"}"
+		}, jarPath, "1.4");
+		getJavaModel().refreshExternalArchives(null,null);
+		
+		setWorkingCopyContents(
+			"package p1;\n" +
+			"public class X extends p.Y {\n" +
+			"  public void bar() {\n" +
+			"    foo(\"a\");\n" +
+			"  }\n" +
+			"}");
+		this.workingCopy.reconcile(ICompilationUnit.NO_AST, false, null, null);
+		assertProblems(
+			"Unexpected problems", 
+			"----------\n" + 
+			"----------\n"
+		);
+	} finally {
+		removeLibraryEntry(project, new Path(jarPath));
+		deleteFile(new File(jarPath));
+	}
+}
 /**
  * Ensures that the reconciler reconciles the new contents with the current
  * contents,updating the structure of this reconciler's compilation
Index: src/org/eclipse/jdt/core/tests/model/AbstractJavaModelTests.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.core.tests.model/src/org/eclipse/jdt/core/tests/model/AbstractJavaModelTests.java,v
retrieving revision 1.164
diff -u -r1.164 AbstractJavaModelTests.java
--- src/org/eclipse/jdt/core/tests/model/AbstractJavaModelTests.java	6 Apr 2006 15:25:02 -0000	1.164
+++ src/org/eclipse/jdt/core/tests/model/AbstractJavaModelTests.java	14 Apr 2006 15:28:04 -0000
@@ -1663,10 +1663,11 @@
 	protected void removeLibraryEntry(IJavaProject project, Path path) throws JavaModelException {
 		IClasspathEntry[] entries = project.getRawClasspath();
 		int length = entries.length;
-		IClasspathEntry[] newEntries = new IClasspathEntry[length-1];
+		IClasspathEntry[] newEntries = null;
 		for (int i = 0; i < length; i++) {
 			IClasspathEntry entry = entries[i];
 			if (entry.getPath().equals(path)) {
+				newEntries = new IClasspathEntry[length-1];
 				if (i > 0)
 					System.arraycopy(entries, 0, newEntries, 0, i);
 				if (i < length-1)
@@ -1674,7 +1675,8 @@
 				break;
 			}	
 		}
-		project.setRawClasspath(newEntries, null);
+		if (newEntries != null)
+			project.setRawClasspath(newEntries, null);
 	}
 
 	/**
#P org.eclipse.jdt.core
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 1.282
diff -u -r1.282 DeltaProcessor.java
--- model/org/eclipse/jdt/internal/core/DeltaProcessor.java	29 Mar 2006 03:08:48 -0000	1.282
+++ model/org/eclipse/jdt/internal/core/DeltaProcessor.java	14 Apr 2006 15:28:08 -0000
@@ -309,6 +309,10 @@
 			if (hasDelta){
 				// force classpath marker refresh of affected projects
 				JavaModel.flushExternalFileCache();
+				
+				// flush jar type cache
+				JavaModelManager.getJavaModelManager().resetJarTypeCache();
+				
 				IJavaElementDelta[] projectDeltas = this.currentDelta.getAffectedChildren();
 				final int length = projectDeltas.length;
 				final IProject[] projectsToTouch = new IProject[length];