### Eclipse Workspace Patch 1.0
#P org.eclipse.jdt.core.tests.model
Index: src/org/eclipse/jdt/core/tests/model/ClassFileTests.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.core.tests.model/src/org/eclipse/jdt/core/tests/model/ClassFileTests.java,v
retrieving revision 1.24
diff -u -r1.24 ClassFileTests.java
--- src/org/eclipse/jdt/core/tests/model/ClassFileTests.java	19 Apr 2006 15:29:05 -0000	1.24
+++ src/org/eclipse/jdt/core/tests/model/ClassFileTests.java	26 Apr 2006 10:28:34 -0000
@@ -609,8 +609,8 @@
 }
 
 /*
- * Ensures that asking for a IClassFile in a non-Java project throws a JavaModelException
- * (regression test for bug 132494 JavaModelException opening up class file in non java project
+ * Ensures that asking for the source range of a IClassFile in a non-Java project throws a JavaModelException
+ * (regression test for bug 132494 JavaModelException opening up class file in non java project)
  */
 public void testSourceRangeNonJavaProject() throws CoreException {
 	try {
@@ -630,6 +630,21 @@
 }
 
 /*
+ * Ensures that asking for the source range of a IClassFile not on the classpath of a Java project doesn't throw a JavaModelException
+ * (regression test for bug 138507 exception in .class file editor for classes imported via plug-in import)
+ */
+public void testSourceRangeNotOnClasspath() throws CoreException {
+	try {
+		createJavaProject("P2", new String[] {"src"}, "bin");
+		createFile("/P2/bin/X.class", "");
+		IClassFile classX = getClassFile("/P2/bin/X.class");
+		assertNull("Unxepected source range", classX.getSourceRange());
+	} finally {
+		deleteProject("P2");
+	}
+}
+
+/*
  * Ensure that opening a binary type parameter when its parent has not been open yet
  * doesn't throw a JavaModelException
  * (regression test for bug 101228 JME on code assist)
#P org.eclipse.jdt.core
Index: model/org/eclipse/jdt/internal/core/ClassFile.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.core/model/org/eclipse/jdt/internal/core/ClassFile.java,v
retrieving revision 1.123
diff -u -r1.123 ClassFile.java
--- model/org/eclipse/jdt/internal/core/ClassFile.java	4 Apr 2006 08:49:13 -0000	1.123
+++ model/org/eclipse/jdt/internal/core/ClassFile.java	26 Apr 2006 10:28:41 -0000
@@ -310,6 +310,8 @@
 		IBuffer buffer = openBuffer(null, info);
 		if (buffer != null)
 			return buffer;
+		if (status.getCode() == IJavaModelStatusConstants.ELEMENT_NOT_ON_CLASSPATH)
+			return null; // don't throw a JavaModelException to be able to open .class file outside the classpath (see https://bugs.eclipse.org/bugs/show_bug.cgi?id=138507)
 		throw new JavaModelException((IJavaModelStatus) status);
 	}
 }