1MARC::File(3)         User Contributed Perl Documentation        MARC::File(3)
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NAME

6       MARC::File - Base class for files of MARC records
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SYNOPSIS

9           use MARC::File::USMARC;
10
11           # If you have weird control fields...
12           use MARC::Field;
13           MARC::Field->allow_controlfield_tags('FMT', 'LDX');
14
15           my $file = MARC::File::USMARC->in( $filename );
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17           while ( my $marc = $file->next() ) {
18               # Do something
19           }
20           $file->close();
21           undef $file;
22

EXPORT

24       None.
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METHODS

27   in()
28       Opens a file for import. Ordinarily you will use "MARC::File::USMARC"
29       or "MARC::File::MicroLIF" to do this.
30
31           my $file = MARC::File::USMARC->in( 'file.marc' );
32
33       Returns a "MARC::File" object, or "undef" on failure. If you
34       encountered an error the error message will be stored in
35       $MARC::File::ERROR.
36
37       Optionally you can also pass in a filehandle, and "MARC::File".  will
38       "do the right thing".
39
40           my $handle = IO::File->new( 'gunzip -c file.marc.gz |' );
41           my $file = MARC::File::USMARC->in( $handle );
42
43   next( [\&filter_func] )
44       Reads the next record from the file handle passed in.
45
46       The $filter_func is a reference to a filtering function.  Currently,
47       only USMARC records support this.  See MARC::File::USMARC's "decode()"
48       function for details.
49
50       Returns a MARC::Record reference, or "undef" on error.
51
52   skip()
53       Skips over the next record in the file.  Same as "next()", without the
54       overhead of parsing a record you're going to throw away anyway.
55
56       Returns 1 or undef.
57
58   warnings()
59       Simlilar to the methods in MARC::Record and MARC::Batch, "warnings()"
60       will return any warnings that have accumulated while processing this
61       file; and as a side-effect will clear the warnings buffer.
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63   close()
64       Closes the file, both from the object's point of view, and the actual
65       file.
66
67   write()
68       Writes a record to the output file.  This method must be overridden in
69       your subclass.
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71   decode()
72       Decodes a record into a USMARC format.  This method must be overridden
73       in your subclass.
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76       MARC::Record
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TODO

79       •   "out()" method
80
81           We only handle files for input right now.
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LICENSE

84       This code may be distributed under the same terms as Perl itself.
85
86       Please note that these modules are not products of or supported by the
87       employers of the various contributors to the code.
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AUTHOR

90       Andy Lester, "<andy@petdance.com>"
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94perl v5.36.0                      2022-07-22                     MARC::File(3)
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