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type_info.rb
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type_info.rb
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#!/usr/bin/env ruby
# =============================================================================================
# Schemaform
# A DSL giving the power of spreadsheets in a relational setting.
#
# [Website] http://schemaform.org
# [Copyright] Copyright 2004-2012 Chris Poirier
# [License] Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# =============================================================================================
#
# Represents a SQL type within the system.
module Schemaform
module Adapters
module GenericSQL
class TypeInfo
def initialize( type_manager, sql, index_width, quoted = false, properties = {}, &formatter )
@type_manager = type_manager
@sql = sql
@index_width = index_width
@quoted = quoted
@properties = properties
@formatter = formatter
end
attr_reader :type_manager, :sql, :index_width, :properties
def quoted?() ; @quoted ; end
def indexable?() ; @index_width > 0 ; end
def quote_literal( adapter, value )
if value.nil? then
"null"
elsif value == [] then
"?"
elsif @quoted then
@type_manager.adapter.quote_string(format_literal(value))
else
format_literal(value)
end
end
def format_literal( adapter, value )
@formatter ? @formatter.call(value.to_s) : value.to_s
end
def description()
@sql
end
end # TypeInfo
end # Adapters
end # GenericSQL
end # Schemaform