Small Stax fixes.

org.springframework.core/src/main/java/org/springframework/util/xml/StaxEventXMLReader.java

@@ -80,7 +80,7 @@ class StaxEventXMLReader extends AbstractStaxXMLReader {
 	StaxEventXMLReader(XMLEventReader reader) {
 		try {
 			XMLEvent event = reader.peek();
-			if (event == null || !(event.isStartDocument() || event.isStartElement())) {
+			if (event != null && !(event.isStartDocument() || event.isStartElement())) {
 				throw new IllegalStateException("XMLEventReader not at start of document or element");
 			}
 		}
@@ -146,7 +146,7 @@ class StaxEventXMLReader extends AbstractStaxXMLReader {
 					break;
 			}
 		}
-		if (!documentEnded) {
+		if (documentStarted && !documentEnded) {
 			handleEndDocument();
 		}
 
@@ -169,19 +169,19 @@ class StaxEventXMLReader extends AbstractStaxXMLReader {
 			getContentHandler().setDocumentLocator(new Locator2() {
 
 				public int getColumnNumber() {
-					return location.getColumnNumber();
+					return location != null ? location.getColumnNumber() : -1;
 				}
 
 				public int getLineNumber() {
-					return location.getLineNumber();
+					return location != null ? location.getLineNumber() : -1;
 				}
 
 				public String getPublicId() {
-					return location.getPublicId();
+					return location != null ? location.getPublicId() : null;
 				}
 
 				public String getSystemId() {
-					return location.getSystemId();
+					return location != null ? location.getSystemId() : null;
 				}
 
 				public String getXMLVersion() {

org.springframework.core/src/main/java/org/springframework/util/xml/StaxStreamXMLReader.java

@@ -143,19 +143,19 @@ class StaxStreamXMLReader extends AbstractStaxXMLReader {
 			getContentHandler().setDocumentLocator(new Locator2() {
 
 				public int getColumnNumber() {
-					return location.getColumnNumber();
+					return location != null ? location.getColumnNumber() : -1;
 				}
 
 				public int getLineNumber() {
-					return location.getLineNumber();
+					return location != null ? location.getLineNumber() : -1;
 				}
 
 				public String getPublicId() {
-					return location.getPublicId();
+					return location != null ? location.getPublicId() : null;
 				}
 
 				public String getSystemId() {
-					return location.getSystemId();
+					return location != null ? location.getSystemId() : null;
 				}
 
 				public String getXMLVersion() {