class ActiveRecord::ConnectionAdapters::SchemaCache

# File activerecord/lib/active_record/connection_adapters/schema_cache.rb, line 9
def initialize(conn)
  @connection = conn

  @columns      = {}
  @columns_hash = {}
  @primary_keys = {}
  @data_sources = {}
  @indexes      = {}
end

# File activerecord/lib/active_record/connection_adapters/schema_cache.rb, line 61
def add(table_name)
  if data_source_exists?(table_name)
    primary_keys(table_name)
    columns(table_name)
    columns_hash(table_name)
    indexes(table_name)
  end
end

# File activerecord/lib/active_record/connection_adapters/schema_cache.rb, line 101
def clear!
  @columns.clear
  @columns_hash.clear
  @primary_keys.clear
  @data_sources.clear
  @indexes.clear
  @version = nil
  @database_version = nil
end

# File activerecord/lib/active_record/connection_adapters/schema_cache.rb, line 116
def clear_data_source_cache!(name)
  @columns.delete name
  @columns_hash.delete name
  @primary_keys.delete name
  @data_sources.delete name
  @indexes.delete name
end

# File activerecord/lib/active_record/connection_adapters/schema_cache.rb, line 75
def columns(table_name)
  @columns[table_name] ||= connection.columns(table_name)
end

# File activerecord/lib/active_record/connection_adapters/schema_cache.rb, line 81
def columns_hash(table_name)
  @columns_hash[table_name] ||= Hash[columns(table_name).map { |col|
    [col.name, col]
  }]
end

# File activerecord/lib/active_record/connection_adapters/schema_cache.rb, line 88
def columns_hash?(table_name)
  @columns_hash.key?(table_name)
end

# File activerecord/lib/active_record/connection_adapters/schema_cache.rb, line 53
def data_source_exists?(name)
  prepare_data_sources if @data_sources.empty?
  return @data_sources[name] if @data_sources.key? name

  @data_sources[name] = connection.data_source_exists?(name)
end

# File activerecord/lib/active_record/connection_adapters/schema_cache.rb, line 70
def data_sources(name)
  @data_sources[name]
end

# File activerecord/lib/active_record/connection_adapters/schema_cache.rb, line 28
def encode_with(coder)
  coder["columns"]          = @columns
  coder["columns_hash"]     = @columns_hash
  coder["primary_keys"]     = @primary_keys
  coder["data_sources"]     = @data_sources
  coder["indexes"]          = @indexes
  coder["version"]          = connection.migration_context.current_version
  coder["database_version"] = database_version
end

# File activerecord/lib/active_record/connection_adapters/schema_cache.rb, line 92
def indexes(table_name)
  @indexes[table_name] ||= connection.indexes(table_name)
end

# File activerecord/lib/active_record/connection_adapters/schema_cache.rb, line 38
def init_with(coder)
  @columns          = coder["columns"]
  @columns_hash     = coder["columns_hash"]
  @primary_keys     = coder["primary_keys"]
  @data_sources     = coder["data_sources"]
  @indexes          = coder["indexes"] || {}
  @version          = coder["version"]
  @database_version = coder["database_version"]
end

# File activerecord/lib/active_record/connection_adapters/schema_cache.rb, line 19
def initialize_dup(other)
  super
  @columns      = @columns.dup
  @columns_hash = @columns_hash.dup
  @primary_keys = @primary_keys.dup
  @data_sources = @data_sources.dup
  @indexes      = @indexes.dup
end

# File activerecord/lib/active_record/connection_adapters/schema_cache.rb, line 124
def marshal_dump
  # if we get current version during initialization, it happens stack over flow.
  @version = connection.migration_context.current_version
  [@version, @columns, @columns_hash, @primary_keys, @data_sources, @indexes, database_version]
end

# File activerecord/lib/active_record/connection_adapters/schema_cache.rb, line 130
def marshal_load(array)
  @version, @columns, @columns_hash, @primary_keys, @data_sources, @indexes, @database_version = array
  @indexes = @indexes || {}
end

# File activerecord/lib/active_record/connection_adapters/schema_cache.rb, line 48
def primary_keys(table_name)
  @primary_keys[table_name] ||= data_source_exists?(table_name) ? connection.primary_key(table_name) : nil
end

# File activerecord/lib/active_record/connection_adapters/schema_cache.rb, line 111
def size
  [@columns, @columns_hash, @primary_keys, @data_sources].sum(&:size)
end