1.23

[ZOOM-Perl-moved-to-github.git] / Changes

$Id: Changes,v 1.78 2008-06-09 13:50:13 mike Exp $

Revision history for Perl extension Net::Z3950::ZOOM.

1.23  Mon Jun  9 14:50:09 BST 2008
        - Net::Z3950::ZOOM::record_get() now patches around the
          problem of naughty servers that refuse to return anything
          for an OPAC record when there is no non-bibliographic part,
          by falling back on requesting an XML record in such cases.

1.22  Tue May 27 14:00:12 BST 2008
        - Fix Net::Z3950::ZOOM::record_get() to use a struct datachunk
          _when_ appropriate, e.g. for "render" not for "database" and
          "syntax".
        - Remove the unused $len reference parameter from record_get()
          and $record->get(): this is now used in the underlying C
          layer to make Perl strings of the right length, and is of no
          value higher up the stack.
        - Fix a bug in ZOOM::ResultSet::records(): requests including
          the last record in the set were incorrectly declined.
        - Better Debian packaging: use "make debian" to create new
          "debian/output" directory containing .deb package file,
          changes file, etc.
        - Clear up a few warnings in ZOOM.xs
        - Minor documentation improvements.

1.21  Mon Oct 29 12:07:25 GMT 2007
        - In the "typemap" file's handling of opaquechar*, use STRLEN
          type for _unused_len in instead of unsigned: this prevents a
          (possibly serious) warning on some 64-bit architectures,
          although applications that do not use the option_binary()
          methods will be safe with the previous release.
        - Add explicit "#include <yaz/log.h>" to ZOOM.xs in the hope
          of preventing undeclared-function warnings that some users
          have reported but which I have been unable to reproduce.

1.20  Fri Sep 21 17:51:55 BST 2007
        - Add new sample program, samples/zoom/zoomscan.pl
        - samples/zoom/zoomtst1.pl now accepts arbitrary options at
          the end of the command-line, so that (for example) you can
          specify a non-USMARC record syntax.
        - Add new functions Net::Z3950::ZOOM::diag_srw_str() and
          ZOOM::diag_srw_str() to map SRW diagnostic codes into
          human-readable messages.
        - ZOOM::Exception() constructor uses diag_srw_str() to fill in
          the error message, if it is undefined, for SRW errors.
        - The render() method of ZOOM::Exception(), and therefore the
          overloaded stringifying operator, deals with exceptions that
          have no message().
        - Corrected the scan parts of the test-suite that use CQL so
          that they explicitly perform client-side CQL compilation and
          send the resulting Type-1 query.  Previously, these tests
          were (accidentally) requesting that CQL be sent as-is to the
          server, but this mistake was being masked by an error in
          older versions of ZOOM-C that compiled client-side anyway!

1.19  Mon Jul  9 14:09:31 BST 2007
        - Add $conn->exception() method.
        - Set version number for Net::Z3950 to 0.99 -- less than the
          1.0 version number that will be used when it successfully
          emulates the old Net::Z3950 module, but superseding the last
          release, 0.51, of that module.
        - Include samples/zoom/zdump.pl in distribution.
        - Add "irspy" namespace to samples/zoom/zselect

1.18  Mon Feb 26 14:57:48 GMT 2007
        - When a connection is in asynchronous mode, failing
          operations (search, scan, etc.) no longer throw exceptions.
          This is because the event-loop in asychronous applications
          needs to check for errors anyway, in case the server has
          returned high-level diagnostics such as "unsupported use
          attribute".  So this check within the event-loop is now the
          only place where error-checking need be done.
        - Add new public ZOOM::Connection() function, check(), which
          throws an exception if an error is pending (even if the
          connection is asynchronous).
        - New YAZ logging level, "zoom_check", notes when errors are
          detected and either left unreported (asynchronous
          connections) or thrown as exception (synchronous).

1.17  Thu Feb 22 20:38:45 GMT 2007
        - Change Net::Z3950::ZOOM::event() to allocate its array of
          connection pointers dynamically, so there is no longer an
          arbitrary limit of 100.
        - New connection-level option "_check_debug" emits messages on
          standard error when checking a connection find an error that
          is about to result in throwing an exception.  There is no
          reason for you ever to use this, though -- pretend you don't
          know about it.

1.16  Tue Jan 16 11:18:34 GMT 2007
        - Require version 2.1.41 or better of YAZ, so that Init
          Response options are available using
          $conn->option("init_opt_sort") etc.
        - Include samples/zoom/zhello.pl to exercise these options.
        - Add ZOOM_connection_peek_event() and $conn->peek_event().
        - Require YAZ version 2.1.45, which is the first to provide
          ZOOM_connection_peek_event().

1.15  Fri Dec  1 14:17:49 GMT 2006
        - ZOOM::Error::INIT is renamed to ZOOM::Error::ZINIT, since
          INIT is a reserved word in Perl.  In version 1.14 and
          earlier, "require ZOOM" would fail, saying "Too late to run
          INIT block", and "use ZOOM" would result in
          ZOOM::Error::INIT having a value equal to its name (why?!)
          rather than, as intended, Net::Z3950::ZOOM::ERROR_INIT.
        - Belatedly added documentation for $rec->error() and
          $rec->exception().

1.14  Tue Nov 28 17:33:07 GMT 2006
        - Add $record->error() to return non-surrogate diagnostics,
          and $record->exception() to return the same information
          wrapped in a ZOOM::Exception object.
        - Requires YAZ 2.1.40, which provides ZOOM_record_error().
        - $conn->error_x() now returns the error-code when called in
          scalar context, rather than the diagnostic set name.

1.13  Sat Nov  4 16:47:00 GMT 2006
        - ZOOM::Connection::create() may now take either a single
          argument, which is a ZOOM::Options object, or any even
          number of argument (including zero), which are key => value
          pairs of options to set.
        - ZOOM::Connection::new(), having been refactored to use
          create(), can now also take a ZOOM::Options argument.
        - Documentation now includes information on specifying SRW,
          SRU-over-GET and SRU-over-POST connections.
        - ZOOM::ResultSet::record() throws a diagnostic if asked to
          retrieve records out of range for the result-set.
        - All tests against indexdata.com are now explicitly against
          z3950.indexdata.com, as the identity of the former name has
          recently changed.

1.12  (NEVER PUBLICLY RELEASED; these changes are included in 1.13)
        - Include the useful example program samples/zoom/zselect,
          which is installed as part of "make install".
        - Add ZOOM_connection_is_idle() and $conn->is_idle().
        - Require YAZ version 2.1.35, which is the first to provide
          ZOOM_connection_is_idle().
        - Fix bug in ZOOM::Connection class code that made the
          difficult to subclass -- when called as
          $class->SUPER::new(@_), the constructor blessed the new
          object into ZOOM::Connection rather than info the subclass.

1.11  Thu Aug 31 16:47:53 BST 2006
        - Require YAZ version 2.1.17, which has important ZOOM-C
          bug-fixes.
        - Do not use "-Wdeclaration-after-statement" compiler option,
          since this supported only by GCC (and only recent versions).

1.10  Thu Jun 15 16:42:47 BST 2006
        - No functional changes, but use Adam's modified API to
          ZOOM_query_ccl2rpn().  This incompatible change means that
          RELEASE 1.09 WILL NOT BUILD against any recent YAZ.

1.09  Tue Jun 13 17:44:43 2006
        - Add new function Net::Z3950::ZOOM::query_ccl2rpn(), for
          client-side CCL compilation.
        - Add new ZOOM::Query::CCL2RPN class, encapsulating CCL
          compiler functionality as a Query subclass.  This allows
          client-side CCL to be used for both search and scan.
        - Add two new error-codes, CCL_CONFIG and CCL_PARSE,
          returned by the client-side CCL facilities.
        - Supply a sample CCL profile file: samples/ccl/default.bib,
          copied from the same-named file distributed with YAZ.
        - The test-scripts t/12-query.t and t/22-query.t are extended
          to also test client-side CCL searching.
        - The test-scripts t/15-scan.t and t/25-scan.t are extended
          to also test client-side CCL scanning.
        - Documentation updated to describe use of CCL.
        - Add a nice, simple update client: samples/zoom/update.pl

1.08  Thu May 11 22:40:41 BST 2006
        - Requires version 2.1.11 of YAZ, not 2.0.11.  This is a
          bugfix: the old reliance on 2.0.11 was merely a typo.

1.07  Thu May 11 17:45:37 BST 2006
        - Makefile.PL checks for at least version 2.1.11 of YAZ, and
          refuses to build if it's not present.  Thanks to "gregor"
          (an otherwise anonymous CPAN tester) for notifying me of the
          previously poor reporting of failure when running against an
          earlier YAZ.
        - No changes to functionality or documentation.

1.06  Wed Apr 19 21:11:52 BST 2006
        - Avoid mixed statement/declaration in ZOOM.xs.  *sigh*  Why
          the heck GCC allows this by default I will never understand.
        - Add (commented out) OPTIMIZE option to Makefile.PL, to turn
          on -Wdeclaration-after-statement, which makes mixed
          statement/declaration illegal.

1.05  Wed Apr 12 13:31:27 BST 2006
        - Implementation of asynchronous events!  The Net::Z3950::ZOOM
          interface provides this through the event, last_event() and
          event_str() functions.  The ZOOM interface provides it
          through the ZOOM::event() and ZOOM:event_str() functions,
          and the ZOOM::Connection class's last_event() function.
        - New sample programs added illustrating both asynchronous
          interfaces: samples/net-z3950-zoom/zoomtst3.pl and
          samples/zoom/zoomtst3.pl respectively.  Additional sample
          programs "async.pl" and "trivial-async.pl" for the ZOOM
          interface only, the latter being a "shortest possible
          broadcast search application".
        - Added documentation on writing asynchronous applications.
        - Added test-scripts "t/19-events.t" and "t/29-event.t" for
          events on an asynchronous connection.
        - Fix ZOOM::Connection::new so that options are handled in
          accordance with the documentation: applied _before_ the
          connection is forged, so that "async" and similar options
          can take effect.

1.04  Mon Apr  3 14:56:11 BST 2006
        - The ZOOM-Perl layer now provides access to the underlying
          ZOOM-C's character-translation functionality, through new
          optional arguments to ZOOM::Record's render() and raw()
          methods, and a new underlying get() method.

1.03  Thu Mar  9 12:55:23 GMT 2006
        - Allow additional key => value pairs as arguments to the
          ZOOM::Connectoion constructor; these are added as Connection
          options before the protocol connection is forged.

1.02  Thu Mar  9 11:36:55 GMT 2006
        - Add interface to yaz_version().
        - Emit big warning at startup time if YAZ version is less than
          2.0.11 (which is what ZOOM-Perl 1.02 requires) unless the
          file /tmp/ignore-ZOOM-YAZ-version-mismatch exists.
        - Fix incorrect ZOOM-package URL in documentation.
        - Fix typo ("createdb" package) in documentation.
        - The ZOOM::Connection constructor may now be called with only
          a single argument (host-string) and does not require a
          dummy port-number argument.

1.01  Thu Dec 22 14:13:34 GMT 2005
        - Place some CODE: chunks in "ZOOM.xs" inside curly brackets
          so that the declarations they begin with are at the start of
          the block.  This avoid mixed code/declarations.  (The
          "correct" solution is to use INIT: clauses in the XS file,
          but they don't seem to work: the code in them is slapped
          down right next to the CODE:, so declarations are not
          acceptable there either.)
        - Add new function Net::Z3950::ZOOM::connection_scan1(), which
          uses a query object to indicate the start-term.  This opens
          the way for using CQL queries for scanning once the
          underlying ZOOM-C code supports this.
        - NOTE BACKWARDS-INCOMPATIBLE CHANGE: The ZOOM::Connection
          method scan() is renamed scan_pqf(), and a new scan() method
          is introduced which calls the underlying scan1() function.
          Thus the scan()/scan_pqf() dichotomy is consistent with that
          between search()/search_pqf().
        - The tests t/15-scan.t and t/25-scan.t now also test for
          scanning by CQL query.  To support these tests, a new files
          is added to the distribution, "samples/cql/pqf.properties"
        - Remove nonsensical clause about CQL sort-specifications from
          the documentation.
        - Add new function Net::Z3950::ZOOM::query_cql2rpn(), for
          client-side CQL compilation.
        - Add new ZOOM::Query::CQL2RPN class, encapsulating CQL
          compiler functionality as a Query subclass.
        - Add two new error-codes, CQL_PARSE and CQL_TRANSFORM,
          returned by the client-side CQL facilities.
        - The test-scripts t/12-query.t and t/22-query.t are extended
          to also test client-side CQL compilation.
        - Add all the yaz_log*() functions within the Net::Z3950::ZOOM
          namespace. 
        - Add new ZOOM::Log class for logging, providing aliases for
          the functions in the Net::Z3950::ZOOM layer.
        - Add diagnostic set to rendering of Exception objects.
        - Documentation added for CQL compilation and logging.

1.00  Wed Dec 14 11:18:33 GMT 2005
        - First distributed version.

0.01  Fri Oct  7 16:14:20 2005
        - original version; created by h2xs 1.23 with options
                --name=Net::Z3950::ZOOM --compat-version=5.8.0 \
                --omit-constant --skip-exporter --skip-ppport \
                --autogen-xsubs yaz/zoom.h -lyaz -lxml2

--

To be done in future releases:
        - Complete, test and document "update.pl"
        - Create old-style Net::Z3950 compatibility layer.
        - Fix memory leaks in callback functions for option sets.
        - Fix limitation that option-set callback functions must be
          specified as strings containing package-qualified function
          names.