Class: Chicago::Database::SchemaGenerator Private

Inherits:
Object
  • Object
show all
Defined in:
lib/chicago/database/schema_generator.rb

Overview

This class is part of a private API. You should avoid using this class if possible, as it may be removed or be changed in the future.

A StarSchema Visitor which produces a hash similar to the hash produced by Sequel.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(type_converter) ⇒ SchemaGenerator

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns a new instance of SchemaGenerator.



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# File 'lib/chicago/database/schema_generator.rb', line 8

def initialize(type_converter)
  @type_converter = type_converter
end

Instance Attribute Details

#type_converter=(value) ⇒ Object (writeonly)

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/chicago/database/schema_generator.rb', line 6

def type_converter=(value)
  @type_converter = value
end

Instance Method Details

#traverse(schema) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/chicago/database/schema_generator.rb', line 12

def traverse(schema)
  schema.tables.inject({}) {|hsh,t| hsh.merge(t.visit(self)) }
end

#visit_column(column) ⇒ Object Also known as: visit_measure, visit_dimension_reference

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/chicago/database/schema_generator.rb', line 25

def visit_column(column)
  column.to_hash.merge :column_type => @type_converter.db_type(column)
end

#visit_dimension(dimension) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/chicago/database/schema_generator.rb', line 20

def visit_dimension(dimension)
  {dimension.table_name => basic_table(dimension)}.
    merge!(key_table(dimension))
end

#visit_fact(fact) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/chicago/database/schema_generator.rb', line 16

def visit_fact(fact)
  {fact.table_name => basic_table(fact)}
end