### Eclipse Workspace Patch 1.0
#P org.eclipse.jdt.core
Index: model/org/eclipse/jdt/core/Signature.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.core/model/org/eclipse/jdt/core/Signature.java,v
retrieving revision 1.98
diff -u -r1.98 Signature.java
--- model/org/eclipse/jdt/core/Signature.java	20 Oct 2010 14:25:10 -0000	1.98
+++ model/org/eclipse/jdt/core/Signature.java	26 Nov 2010 07:29:52 -0000
@@ -974,7 +974,9 @@
  *   correct
  */
 public static String getElementType(String typeSignature) throws IllegalArgumentException {
-	return new String(getElementType(typeSignature.toCharArray()));
+	char[] signature = typeSignature.toCharArray();
+	char[] elementType = getElementType(signature);
+	return signature == elementType ? typeSignature : new String(elementType);
 }
 /**
  * Returns the number of parameter types in the given method signature.
@@ -1387,7 +1389,9 @@
  * @since 3.1
  */
 public static String getTypeErasure(String parameterizedTypeSignature) throws IllegalArgumentException {
-	return new String(getTypeErasure(parameterizedTypeSignature.toCharArray()));
+	char[] signature = parameterizedTypeSignature.toCharArray();
+	char[] erasure = getTypeErasure(signature);
+	return signature == erasure ? parameterizedTypeSignature : new String(erasure);
 }
 
 /**
#P org.eclipse.jdt.core.tests.model
Index: src/org/eclipse/jdt/core/tests/model/SignatureTests.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.core.tests.model/src/org/eclipse/jdt/core/tests/model/SignatureTests.java,v
retrieving revision 1.51
diff -u -r1.51 SignatureTests.java
--- src/org/eclipse/jdt/core/tests/model/SignatureTests.java	5 Mar 2010 21:25:00 -0000	1.51
+++ src/org/eclipse/jdt/core/tests/model/SignatureTests.java	26 Nov 2010 07:29:54 -0000
@@ -173,6 +173,10 @@
 		"Signature#getElementType not correct", "Qlist<Qstring;>;",
 		Signature.getElementType("[[[[Qlist<Qstring;>;"));
 }
+public void testGetElementType2() {
+	String typeSign = "Ljava.util.List;";
+	assertTrue(Signature.getElementType(typeSign) == typeSign);
+}
 /**
  * @see Signature
  */
@@ -771,6 +775,18 @@
 	);
 }
 
+public void testGetTypeErasure9() {
+	String sign = "Ljava.util.List;";
+	assertTrue(Signature.getTypeErasure(sign) == sign);
+}
+
+public void testGetTypeErasure10() {
+	assertEquals(
+			"Ljava.util.List;",
+			Signature.getTypeErasure("Ljava.util.List<-[Ljava.lang.Number;>;")
+	);
+}
+
 /**
  * @see Signature
  */