Class: KBIndex

Inherits:
Object show all
Includes:
KBEncryptionMixin, KBTypeConversionsMixin
Defined in:
lib/kirbybase.rb

Overview

KBIndex

Constant Summary

Constants included from KBEncryptionMixin

KBEncryptionMixin::EN_KEY, KBEncryptionMixin::EN_KEY1, KBEncryptionMixin::EN_KEY_LEN, KBEncryptionMixin::EN_STR, KBEncryptionMixin::EN_STR_LEN

Constants included from KBTypeConversionsMixin

KBTypeConversionsMixin::ENCODE_RE, KBTypeConversionsMixin::KB_NIL, KBTypeConversionsMixin::UNENCODE_RE

Instance Method Summary collapse

Methods included from KBEncryptionMixin

#encrypt_str, #unencrypt_str

Methods included from KBTypeConversionsMixin

#convert_to_encoded_string, #convert_to_native_type

Constructor Details

#initialize(table, index_fields) ⇒ KBIndex

initialize



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# File 'lib/kirbybase.rb', line 3421

def initialize(table, index_fields)
    @last_update = Time.new
    @idx_arr = []
    @table = table
    @index_fields = index_fields
    @col_poss = index_fields.collect {|i| table.field_names.index(i) }
    @col_names = index_fields
    @col_types = index_fields.collect {|i|
     table.field_types[table.field_names.index(i)]}
end

Instance Method Details

#add_index_rec(rec) ⇒ Object

add_index_rec



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# File 'lib/kirbybase.rb', line 3483

def add_index_rec(rec)
    @last_upddate = Time.new if append_new_rec_to_index_array(rec)
end

#append_new_rec_to_index_array(rec) ⇒ Object

append_new_rec_to_index_array



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# File 'lib/kirbybase.rb', line 3507

def append_new_rec_to_index_array(rec)
    idx_rec = []
    @col_poss.zip(@col_types).each do |col_pos, col_type|
        idx_rec << convert_to_native_type(col_type, rec[col_pos])
     end

    return false if idx_rec.uniq == [kb_nil]

    idx_rec << rec.first.to_i
    @idx_arr << idx_rec
    return true
end

#delete_index_rec(recno) ⇒ Object

delete_index_rec



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# File 'lib/kirbybase.rb', line 3490

def delete_index_rec(recno)
    i = @idx_arr.rassoc(recno.to_i)
    @idx_arr.delete_at(@idx_arr.index(i)) unless i.nil?
    @last_update = Time.new
end

#get_idx ⇒ Object

get_idx



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# File 'lib/kirbybase.rb', line 3435

def get_idx
    return @idx_arr
end

#get_timestamp ⇒ Object

get_timestamp



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# File 'lib/kirbybase.rb', line 3442

def get_timestamp
    return @last_update
end

#rebuild(fptr) ⇒ Object

rebuild



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# File 'lib/kirbybase.rb', line 3449

def rebuild(fptr)
    @idx_arr.clear

    encrypted = @table.encrypted?

    # Skip header rec.
    fptr.readline

    begin
        # Loop through table.
        while true
            line = fptr.readline

            line = unencrypt_str(line) if encrypted
            line.strip!

            # If blank line (i.e. 'deleted'), skip it.
            next if line == ''

            # Split the line up into fields.
            rec = line.split('|', @col_poss.max+2)

            append_new_rec_to_index_array(rec)
        end
    # Here's how we break out of the loop...
    rescue EOFError
    end

    @last_update = Time.new
end

#update_index_rec(rec) ⇒ Object

update_index_rec



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# File 'lib/kirbybase.rb', line 3499

def update_index_rec(rec)
    delete_index_rec(rec.first.to_i)
    add_index_rec(rec)
end