root/main/trunk/greenstone2/perllib/DBDrivers/JDBM.pm @ 30370

Revision 30370, 3.7 KB (checked in by jmt12, 4 years ago)

Reverting these back to the older but better supported ISA approach to declaring inheritance. Not even sure why I used the new parent mechanism (aside from possibly copying from tutorial)... can I still blame baby brain after 10 months?

Line 
1###############################################################################
2#
3# DBDrivers/JDBM.pm -- utility functions for writing to jdbm databases
4#
5# A component of the Greenstone digital library software from the New Zealand
6# Digital Library Project at the University of Waikato, New Zealand.
7#
8# Copyright (C) 1999-2015 New Zealand Digital Library Project
9#
10# This program is free software; you can redistribute it and/or modify it under
11# the terms of the GNU General Public License as published by the Free Software
12# Foundation; either version 2 of the License, or (at your option) any later
13# version.
14#
15# This program is distributed in the hope that it will be useful, but WITHOUT
16# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
17# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
18# more details.
19#
20# You should have received a copy of the GNU General Public License along with
21# this program; if not, write to the Free Software Foundation, Inc., 675 Mass
22# Ave, Cambridge, MA 02139, USA.
23#
24###############################################################################
25
26package DBDrivers::JDBM;
27
28# Pragma
29use strict;
30
31# Libraries
32use util;
33use FileUtils;
34use DBDrivers::70HyphenFormat;
35
36sub BEGIN
37{
38    if (!defined $ENV{'GSDLHOME'} || !defined $ENV{'GSDLOS'}) {
39        die("Error! Environment must be prepared by sourcing setup.bash\n");
40    }
41    @DBDrivers::JDBM::ISA = ('DBDrivers::70HyphenFormat');
42}
43
44
45## @function constructor
46#
47sub new
48{
49    my $class = shift(@_);
50    my $self = DBDrivers::70HyphenFormat->new(@_);
51    $self->{'default_file_extension'} = 'jdb';
52
53    # Executables need a little extra work since we are using Java
54    # - we need to build up the classpath continue the Jar libraries to use
55    my $jdbmwrap_jar = &FileUtils::filenameConcatenate($ENV{'GSDLHOME'}, 'bin', 'java', 'JDBMWrapper.jar');
56    my $jdbm_jar = &FileUtils::filenameConcatenate($ENV{'GSDLHOME'}, 'lib', 'java', 'jdbm.jar');
57    my $classpath = &util::pathname_cat($jdbmwrap_jar,$jdbm_jar);
58    # Massage paths for Cygwin. Away to run a java program, using a binary that
59    # is native to Windows, so need Windows directory and path separators
60    # Note: this is done after the util::pathname_cat as that fuction can also
61    # (incorrectly) change file separators.
62    if ($^O eq "cygwin") {
63    $classpath = `cygpath -wp "$classpath"`;
64    chomp($classpath);
65    $classpath =~ s%\\%\\\\%g;
66    }
67    $self->{'executable_path'} = '';
68    $self->{'read_executable'} = 'java -cp "' . $classpath . '" Jdb2Txt';
69    $self->{'keyread_executable'} = 'java -cp "' . $classpath . '" JdbKeys';
70    $self->{'write_executable'} = 'java -cp "' . $classpath . '" Txt2Jdb';
71    # Support
72    $self->{'supports_set'} = 1;
73
74    bless($self, $class);
75    return $self;
76}
77## constructor() ##
78
79
80# -----------------------------------------------------------------------------
81#   JDBM IMPLEMENTATION
82# -----------------------------------------------------------------------------
83
84# When DBUtil::* is properly structured with inheritence, then
85# much of this code (along with GDBM and GDBM-TXT-GZ) can be grouped into
86# a shared base class.  Really it is only the the command that needs to
87# be constructed that changes between much of the code that is used
88
89# Handled by BaseDBDriver
90# sub get_infodb_file_path {}
91
92# Handles by 70HyphenFormat
93# sub open_infodb_write_handle(string, string?) => filehandle
94# sub close_infodb_write_handle(filehandle) => void
95# sub read_infodb_file(string, hashmap) => void
96# sub read_infodb_keys(string, hashmap) => void
97# sub write_infodb_entry(filehandle, string, hashmap) => void
98# sub write_infodb_rawentry(filehandle, string, string) => void
99# sub set_infodb_entry(filehandle, string, string) => void
100# sub delete_infodb_entry(filehandle, string) => void
101
1021;
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