hg: jdk9/dev/jaxp: 8144967: javax.xml.transform.Source and org.xml.sax.InputSource can be empty

[huizhe.wang at oracle.com]

Changeset: 1e29ca011af4
Author:    joehw
Date:      2016-01-08 10:51 -0800
URL:       http://hg.openjdk.java.net/jdk9/dev/jaxp/rev/1e29ca011af4

8144967: javax.xml.transform.Source and org.xml.sax.InputSource can be empty
Reviewed-by: darcy, rriggs

! src/java.xml/share/classes/javax/xml/transform/Source.java
! src/java.xml/share/classes/javax/xml/transform/dom/DOMSource.java
! src/java.xml/share/classes/javax/xml/transform/sax/SAXSource.java
! src/java.xml/share/classes/javax/xml/transform/stax/StAXSource.java
! src/java.xml/share/classes/javax/xml/transform/stream/StreamSource.java
! src/java.xml/share/classes/org/xml/sax/InputSource.java
+ test/javax/xml/jaxp/unittest/common/Sources.java