### Eclipse Workspace Patch 1.0
#P org.eclipse.jdt.core
Index: compiler/org/eclipse/jdt/internal/compiler/lookup/ReferenceBinding.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.core/compiler/org/eclipse/jdt/internal/compiler/lookup/ReferenceBinding.java,v
retrieving revision 1.105
diff -u -r1.105 ReferenceBinding.java
--- compiler/org/eclipse/jdt/internal/compiler/lookup/ReferenceBinding.java	23 Oct 2006 16:48:39 -0000	1.105
+++ compiler/org/eclipse/jdt/internal/compiler/lookup/ReferenceBinding.java	7 Nov 2006 16:16:05 -0000
@@ -370,6 +370,8 @@
 					this.id = TypeIds.T_JavaUtilIterator;
 				else if (CharOperation.equals(TypeConstants.JAVA_IO_SERIALIZABLE, this.compoundName))
 				    this.id = TypeIds.T_JavaIoSerializable;
+				else if (CharOperation.equals(TypeConstants.JAVA_IO_EXTERNALIZABLE, this.compoundName))
+				    this.id = TypeIds.T_JavaIoExternalizable;
 				return;
 			}
 		
Index: compiler/org/eclipse/jdt/internal/compiler/lookup/TypeIds.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.core/compiler/org/eclipse/jdt/internal/compiler/lookup/TypeIds.java,v
retrieving revision 1.28
diff -u -r1.28 TypeIds.java
--- compiler/org/eclipse/jdt/internal/compiler/lookup/TypeIds.java	29 Mar 2006 02:45:27 -0000	1.28
+++ compiler/org/eclipse/jdt/internal/compiler/lookup/TypeIds.java	7 Nov 2006 16:16:05 -0000
@@ -83,6 +83,8 @@
 	final int T_JavaLangReflectField = 54;
 	final int T_JavaLangReflectMethod = 55;
 
+	final int T_JavaIoExternalizable = 56;
+
 	final int NoId = Integer.MAX_VALUE;
 
 	public static final int IMPLICIT_CONVERSION_MASK = 0xFF;
Index: compiler/org/eclipse/jdt/internal/compiler/lookup/TypeConstants.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.core/compiler/org/eclipse/jdt/internal/compiler/lookup/TypeConstants.java,v
retrieving revision 1.43
diff -u -r1.43 TypeConstants.java
--- compiler/org/eclipse/jdt/internal/compiler/lookup/TypeConstants.java	6 Jul 2006 11:20:36 -0000	1.43
+++ compiler/org/eclipse/jdt/internal/compiler/lookup/TypeConstants.java	7 Nov 2006 16:16:05 -0000
@@ -118,12 +118,17 @@
 	char[][] JAVA_LANG_ANNOTATION_ELEMENTTYPE = {JAVA, LANG, ANNOTATION, "ElementType".toCharArray()}; //$NON-NLS-1$
 	char[][] JAVA_LANG_REFLECT_FIELD = new char[][] {JAVA, LANG, REFLECT, "Field".toCharArray()}; //$NON-NLS-1$
 	char[][] JAVA_LANG_REFLECT_METHOD = new char[][] {JAVA, LANG, REFLECT, "Method".toCharArray()}; //$NON-NLS-1$
+	char[][] JAVA_IO_OBJECTSTREAMEXCEPTION = new char[][] { JAVA, IO, "ObjectStreamException".toCharArray()};//$NON-NLS-1$
+	char[][] JAVA_IO_EXTERNALIZABLE = {JAVA, IO, "Externalizable".toCharArray()}; //$NON-NLS-1$
+	char[][] JAVA_IO_IOEXCEPTION = new char[][] { JAVA, IO, "IOException".toCharArray()};//$NON-NLS-1$
+	char[][] JAVA_IO_OBJECTOUTPUTSTREAM = new char[][] { JAVA, IO, "ObjectOutputStream".toCharArray()}; //$NON-NLS-1$
+	char[][] JAVA_IO_OBJECTINPUTSTREAM = new char[][] { JAVA, IO, "ObjectInputStream".toCharArray()}; //$NON-NLS-1$
 	
 	// Constraints for generic type argument inference
     int CONSTRAINT_EQUAL = 0;		// Actual = Formal
     int CONSTRAINT_EXTENDS = 1;	// Actual << Formal
     int CONSTRAINT_SUPER = 2;		// Actual >> Formal
-	
+
 	// Constants used to perform bound checks
 	int OK = 0;
 	int UNCHECKED = 1;
Index: compiler/org/eclipse/jdt/internal/compiler/ast/TypeDeclaration.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.core/compiler/org/eclipse/jdt/internal/compiler/ast/TypeDeclaration.java,v
retrieving revision 1.128
diff -u -r1.128 TypeDeclaration.java
--- compiler/org/eclipse/jdt/internal/compiler/ast/TypeDeclaration.java	28 Oct 2006 04:11:27 -0000	1.128
+++ compiler/org/eclipse/jdt/internal/compiler/ast/TypeDeclaration.java	7 Nov 2006 16:16:05 -0000
@@ -944,8 +944,51 @@
 						this.scope.compilerOptions().getSeverity(CompilerOptions.MissingSerialVersion) != ProblemSeverities.Ignore
 						&& sourceType.isClass() 
 						&& !sourceType.isAbstract() 
+						&& sourceType.findSuperTypeErasingTo(TypeIds.T_JavaIoExternalizable, false /*Serializable is not a class*/) == null
 						&& sourceType.findSuperTypeErasingTo(TypeIds.T_JavaIoSerializable, false /*Serializable is not a class*/) != null;
-		
+
+		if (needSerialVersion) {
+			// if Object writeReplace() throws java.io.ObjectStreamException is present, then no serialVersionUID is needed
+			// see https://bugs.eclipse.org/bugs/show_bug.cgi?id=101476
+    		CompilationUnitScope compilationUnitScope = this.scope.compilationUnitScope();
+			MethodBinding methodBinding = sourceType.getExactMethod(TypeConstants.WRITEREPLACE, new TypeBinding[0], compilationUnitScope);
+    		if (methodBinding != null
+    				&& methodBinding.isValidBinding()
+    				&& methodBinding.returnType == this.scope.getJavaLangObject()) {
+    			ReferenceBinding[] throwsExceptions = methodBinding.thrownExceptions;
+    			needSerialVersion = throwsExceptions.length != 1
+    					|| !CharOperation.equals(throwsExceptions[0].compoundName, TypeConstants.JAVA_IO_OBJECTSTREAMEXCEPTION);
+    		}
+    		if (needSerialVersion) {
+    			// check the presence of an implementation of the methods
+    			// private void writeObject(java.io.ObjectOutputStream out) throws IOException
+    			// private void readObject(java.io.ObjectInputStream out) throws IOException
+    			boolean hasWriteObjectMethod = false;
+    			boolean hasReadObjectMethod = false;
+    			TypeBinding argumentTypeBinding = this.scope.getType(TypeConstants.JAVA_IO_OBJECTOUTPUTSTREAM, 3);
+    			ReferenceBinding[] throwsExceptions;
+    			if (argumentTypeBinding.isValidBinding()) {
+            		methodBinding = sourceType.getExactMethod(TypeConstants.WRITEOBJECT, new TypeBinding[] { argumentTypeBinding }, compilationUnitScope);
+            		hasWriteObjectMethod = methodBinding != null
+            				&& methodBinding.isValidBinding()
+            				&& methodBinding.modifiers == ClassFileConstants.AccPrivate
+            				&& methodBinding.returnType == TypeBinding.VOID
+            				&& (throwsExceptions = methodBinding.thrownExceptions).length == 1
+            				&& CharOperation.equals(throwsExceptions[0].compoundName, TypeConstants.JAVA_IO_IOEXCEPTION);
+    			}
+    			argumentTypeBinding = this.scope.getType(TypeConstants.JAVA_IO_OBJECTINPUTSTREAM, 3);
+     			if (argumentTypeBinding.isValidBinding()) {
+            		methodBinding = sourceType.getExactMethod(TypeConstants.READOBJECT, new TypeBinding[] { argumentTypeBinding }, compilationUnitScope);
+            		hasReadObjectMethod = methodBinding != null
+            				&& methodBinding.isValidBinding()
+            				&& methodBinding.modifiers == ClassFileConstants.AccPrivate
+            				&& methodBinding.returnType == TypeBinding.VOID
+            				&& (throwsExceptions = methodBinding.thrownExceptions).length == 1
+            				&& CharOperation.equals(throwsExceptions[0].compoundName, TypeConstants.JAVA_IO_IOEXCEPTION);
+    			}
+    			needSerialVersion = !hasWriteObjectMethod || !hasReadObjectMethod;
+    		}
+		}
 		// generics (and non static generic members) cannot extend Throwable
 		if (sourceType.findSuperTypeErasingTo(TypeIds.T_JavaLangThrowable, true) != null) {
 			ReferenceBinding current = sourceType;