Class: CassandraCQL::Result

Inherits:
Object
  • Object
show all
Includes:
Enumerable
Defined in:
lib/cassandra-cql/result.rb

Direct Known Subclasses

V08::Result, V10::Result, V11::Result, V12::Result

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(result) ⇒ Result

Returns a new instance of Result.



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# File 'lib/cassandra-cql/result.rb', line 44

def initialize(result)
  @result = result
  @schema = ResultSchema.new(result.schema) if rows?
  @cursor = 0
end

Instance Attribute Details

#cursor ⇒ Object

Returns the value of attribute cursor.



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# File 'lib/cassandra-cql/result.rb', line 42

def cursor
  @cursor
end

#result ⇒ Object (readonly)

Returns the value of attribute result.



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# File 'lib/cassandra-cql/result.rb', line 42

def result
  @result
end

#schema ⇒ Object (readonly)

Returns the value of attribute schema.



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# File 'lib/cassandra-cql/result.rb', line 42

def schema
  @schema
end

Instance Method Details

#each ⇒ Object 



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# File 'lib/cassandra-cql/result.rb', line 76

def each
  fetch { |row| yield row }
end

#fetch ⇒ Object 



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# File 'lib/cassandra-cql/result.rb', line 97

def fetch
  if block_given?
    while row = fetch_row
      yield row
    end
  else
    fetch_row
  end
end

#fetch_array ⇒ Object 



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# File 'lib/cassandra-cql/result.rb', line 127

def fetch_array
  if block_given?
    while row = fetch_row
      if row.kind_of?(Fixnum)
        yield [row]
      else
        yield row.to_a
      end
    end
  else
    if (row = fetch_row).kind_of?(Fixnum)
      [row]
    else
      row.to_a
    end
  end
end

#fetch_hash ⇒ Object 



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# File 'lib/cassandra-cql/result.rb', line 107

def fetch_hash
  if block_given?
    while row = fetch_row
      if row.kind_of?(Fixnum)
        yield({row => row})
      else
        yield row.to_hash
      end
    end
  else
    if row = fetch_row
      if row.kind_of?(Fixnum)
        {row => row}
      else
        row.to_hash
      end
    end
  end
end

#fetch_row ⇒ Object 



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# File 'lib/cassandra-cql/result.rb', line 80

def fetch_row
  case @result.type
  when CassandraCQL::Thrift::CqlResultType::ROWS
    return nil if @cursor >= rows

    row = Row.new(@result.rows[@cursor], @schema)
    @cursor += 1
    return row
  when CassandraCQL::Thrift::CqlResultType::VOID
    return nil
  when CassandraCQL::Thrift::CqlResultType::INT
    return @result.num
  else
    raise Error::InvalidResultType, "Expects one of 0, 1, 2; was #{@result.type} "
  end
end

#int? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/cassandra-cql/result.rb', line 54

def int?
  @result.type == CassandraCQL::Thrift::CqlResultType::INT
end

#rows ⇒ Object Also known as: size, count, length 



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# File 'lib/cassandra-cql/result.rb', line 62

def rows
  @result.rows.size
end

#rows? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/cassandra-cql/result.rb', line 58

def rows?
  @result.type == CassandraCQL::Thrift::CqlResultType::ROWS
end

#void? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/cassandra-cql/result.rb', line 50

def void?
  @result.type == CassandraCQL::Thrift::CqlResultType::VOID
end