48 lines
1.3 KiB
Ruby
48 lines
1.3 KiB
Ruby
module Polecat
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# reads an index directory
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#
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# This class reads the content of an index directory and builds the
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# necessary structures for the index type.
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class IndexReader
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attr_reader :path
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# initialize a new reader
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#
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# Create a new reader for the given path. If the directory is empty, you
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# will get an empty index, else all documents stored in that directory.
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# @param [String] path the path to the index directory
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def initialize path
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@path = path
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raise ArgumentError, 'no valid directory' unless File.directory? @path
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end
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# read the content of the directory
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#
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# Read all files of the directory and return an index object.
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# @raise [IOError] raised when the directory is locked
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# @return [Polecat::Index] the index with all documents
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def read
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raise IOError, 'index is locked' if locked?
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files = Dir[@path + '/*']
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if files.count > 0
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documents = []
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files.each do |file|
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documents += Marshal.load(File.read(file))
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end
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documents
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else
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[]
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end
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end
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# checks whether the directory is locked or not
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def locked?
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if File.exists? @path + '/index.lock'
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true
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else
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false
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end
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end
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end
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end
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