Class: WinExcelDb::MetaRange

Inherits:
Object
  • Object
show all
Defined in:
lib/win_excel_db/meta_range.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ MetaRange

Returns a new instance of MetaRange.



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# File 'lib/win_excel_db/meta_range.rb', line 9

def initialize
  @meta_rows = Array.new
end

Instance Attribute Details

#meta_rows ⇒ Object

attr_accessor :row_sheet



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# File 'lib/win_excel_db/meta_range.rb', line 7

def meta_rows
  @meta_rows
end

Instance Method Details

#each ⇒ Object 



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# File 'lib/win_excel_db/meta_range.rb', line 55

def each
  @meta_rows.each do |row|
    yield(row)
  end
end

#exclude_row(meta_row) ⇒ Object 



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# File 'lib/win_excel_db/meta_range.rb', line 27

def exclude_row(meta_row)
  @meta_rows.delete(meta_row)
end

#innerjoin(*args) ⇒ Object 



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# File 'lib/win_excel_db/meta_range.rb', line 207

def innerjoin(*args)
  case args.size
  when 3
    self_field = args[0]
    self_field2 = nil
    joining_range = args[1]
    joining_field = args[2]
    joining_field2 = nil
  when 5
    self_field = args[0]
    self_field2 = args[1]
    joining_range = args[2]
    joining_field = args[3]
    joining_field2 = args[4]
  end
  new_range = MetaRange.new
  new_meta_rows = new_range.meta_rows
  @meta_rows.each do |meta_row|
    new_meta_rows.push(meta_row)
  end
  new_range.innerjoin!(self_field, self_field2, joining_range, joining_field, joining_field2)
  return new_range
end

#innerjoin!(*args) ⇒ Object 



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# File 'lib/win_excel_db/meta_range.rb', line 166

def innerjoin!(*args)
  new_array = []

  case args.size
  when 3
    self_field = args[0]
    self_field2 = nil
    joining_range = args[1]
    joining_field = args[2]
    joining_field2 = nil
  when 5
    self_field = args[0]
    self_field2 = args[1]
    joining_range = args[2]
    joining_field = args[3]
    joining_field2 = args[4]
  end

  @meta_rows.each do |self_row|
    hit = false
    joining_range.meta_rows.each do |joining_row|
      first_match = (self_row.read(self_field) == joining_row.read(joining_field))
      second_match = self_field2.nil? || (self_row.read(self_field2) == joining_row.read(joining_field2))

      if first_match && second_match
        joining_row.data_rows.each_value do |joining_data_row|
          self_row.add(joining_data_row)
          hit = true
        end
        new_array << self_row
        break if hit
      end
    end
  end

  @meta_rows.clear
  new_array.each do |row|
    @meta_rows << row
  end
end

#leftjoin(*args) ⇒ Object 



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# File 'lib/win_excel_db/meta_range.rb', line 97

def leftjoin(*args)
  case args.size
  when 3
    self_field = args[0]
    self_field2 = nil
    joining_range = args[1]
    joining_field = args[2]
    joining_field2 = nil
  when 5
    self_field = args[0]
    self_field2 = args[1]
    joining_range = args[2]
    joining_field = args[3]
    joining_field2 = args[4]
  end
  new_range = MetaRange.new
  new_meta_rows = new_range.meta_rows
  # creating a deep copy of own meta_rows in new MetaRange filled with old DataRows
  @meta_rows.each do |meta_row|
    new_meta_rows.push(meta_row)
  end

  new_range.leftjoin!(self_field, self_field2, joining_range, joining_field, joining_field2)

  return new_range
end

#leftjoin!(*args) ⇒ Object 



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# File 'lib/win_excel_db/meta_range.rb', line 61

def leftjoin!(*args)
  case args.size
  when 3
    self_field = args[0]
    self_field2 = nil
    joining_range = args[1]
    joining_field = args[2]
    joining_field2 = nil
  when 5
    self_field = args[0]
    self_field2 = args[1]
    joining_range = args[2]
    joining_field = args[3]
    joining_field2 = args[4]
  end

  @meta_rows.each do |self_row|
    hit = false

    joining_range.meta_rows.each do |joining_row|
      # Vergleiche erstes Feld
      first_match = (self_row.read(self_field) == joining_row.read(joining_field))
      # Zweites Feld nur vergleichen, wenn angegeben, sonst true
      second_match = self_field2.nil? || (self_row.read(self_field2) == joining_row.read(joining_field2))

      if first_match && second_match
        joining_row.data_rows.each_value do |joining_data_row|
          self_row.add(joining_data_row)
          hit = true
        end
        break if hit
      end
    end
  end
end

#length ⇒ Object 



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# File 'lib/win_excel_db/meta_range.rb', line 13

def length
  return @meta_rows.length
end

#push(meta_row) ⇒ Object 



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# File 'lib/win_excel_db/meta_range.rb', line 21

def push(meta_row)
  if !@meta_rows.include?(meta_row) then
    @meta_rows.push(meta_row)
  end
end

#selection(field = '', value = '') ⇒ Object 



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# File 'lib/win_excel_db/meta_range.rb', line 154

def selection(field = '', value = '')
  new_range = MetaRange.new
  new_meta_rows = new_range.meta_rows
  @meta_rows.each { |meta_row| new_meta_rows.push(meta_row) }
  if block_given?
    new_range.selection!(field, value) { |row| yield row }
  else
    new_range.selection!(field, value)
  end
  return new_range
end

#selection!(field = '', value = '') ⇒ Object 



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# File 'lib/win_excel_db/meta_range.rb', line 124

def selection!(field = '', value = '')
  new_meta_rows = Array.new

  @meta_rows.each do |meta_row|
    if !(block_given?) then
      if value.is_a?(String) then
        if value == meta_row.read(field) then
          new_meta_rows.push(meta_row)
        end
      else
        # is regex
        if value === meta_row.read(field) then
          # three equals!
          new_meta_rows.push(meta_row)
        end
      end
    else
      # is a block!
      if yield(meta_row) then
        new_meta_rows.push(meta_row)
      end
    end

  end
  @meta_rows.clear
  new_meta_rows.each do |row|
    @meta_rows.push(row)
  end
end

#shuffle! ⇒ Object 



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# File 'lib/win_excel_db/meta_range.rb', line 17

def shuffle!
  @meta_rows.shuffle!
end

#sort_by(&block) ⇒ Object 



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# File 'lib/win_excel_db/meta_range.rb', line 35

def sort_by(&block)
  new_meta_rows = @meta_rows.sort_by &block
  new_meta_range = MetaRange.new
  new_meta_range.meta_rows = new_meta_rows
end

#sort_by!(&block) ⇒ Object 



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# File 'lib/win_excel_db/meta_range.rb', line 31

def sort_by!(&block)
  @meta_rows.sort_by! &block
end

#take(count) ⇒ Object 



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# File 'lib/win_excel_db/meta_range.rb', line 45

def take(count)
  new_meta_range = MetaRange.new
  new_meta_range.meta_rows = @meta_rows.take(count)
  return new_meta_range
end

#take!(count) ⇒ Object 



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# File 'lib/win_excel_db/meta_range.rb', line 41

def take!(count)
  @meta_rows = @meta_rows.take(count)
end

#take_rows(count) ⇒ Object 



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# File 'lib/win_excel_db/meta_range.rb', line 51

def take_rows(count)
  return @meta_rows.take(count)
end

#to_html ⇒ Object 



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# File 'lib/win_excel_db/meta_range.rb', line 234

def to_html
end

#to_sheet ⇒ Object 



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# File 'lib/win_excel_db/meta_range.rb', line 231

def to_sheet
end