RFR [15/java.xml] 8237456: Transform filtered through SAX filter mishandles character entities

[Joe Wang]

Hi,

Please review a fix to a regression that resulted in invalid output in a 
transform that contains entity references. The regression was caused by 
a JDK9 patch [1]. Adding back the conditional checks fixed the issue.

JBS: https://bugs.openjdk.java.net/browse/JDK-8237456
webrevs: http://cr.openjdk.java.net/~joehw/jdk15/8237456/webrev/

[1] https://bugs.openjdk.java.net/browse/JDK-8087303

Thanks,
Joe