7u40 Request for approval for CR 8013900: More warnings compiling jaxp.

[Daniel Fuchs]

Hi,

This is a request for approval to backport
<https://jbs.oracle.com/bugs/browse/JDK-8013900>
The fix adds several hashCode() methods to classes that were
redefining equals without redefining hashCode().

The changeset for jdk7u-dev [1] had to be altered on one count
compared to the changes pushed in jdk8 [2]:

Since jaxp needs to be compiled using the bootstrap
compiler, it was not possible to use the new
JDK 7 java.util.Objects API.

In order to minimize the changes between the two
changesets - I added an Objects class emulating
the two 'hashCode' and 'equals' methods of java.util.Objects
in the util packages of Xerces, Xalan, and Bcel.

The altered changeset for JDK 7 was reviewed in this thread:
<http://mail.openjdk.java.net/pipermail/core-libs-dev/2013-May/017508.html> 
and reviewed by Joe Wang (joehw) and Chris
Hegarty (chegar).

Here is the altered changeset for jdk7u-dev:
[1] <http://cr.openjdk.java.net/~dfuchs/JDK-8013900/webrev-jdk7u-dev.00/>

Here is the changeset that was pushed in jdk8:
[2] <http://cr.openjdk.java.net/~dfuchs/JDK-8013900/webrev.01/>

Best regards,

-- daniel

Review for the original jdk8 changeset [2] happened on core-libs-dev:
<http://mail.openjdk.java.net/pipermail/core-libs-dev/2013-May/017033.html>