Class: Lafcadio::Query::CompoundCondition

Inherits:
Condition
  • Object
show all
Defined in:
lib/lafcadio/query.rb

Overview

:nodoc:

Direct Known Subclasses

Include

Instance Attribute Summary

Attributes inherited from Condition

#domain_class

Instance Method Summary collapse

Methods inherited from Condition

#&, #db_field_name, #eql?, #field, #not, #one_pk_id?, #primary_key_field?, #query, search_term_type, #to_condition, #|

Constructor Details

#initialize(*args) ⇒ CompoundCondition

Returns a new instance of CompoundCondition.



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# File 'lib/lafcadio/query.rb', line 444

def initialize( *args )
	if( [ :and, :or ].include?( args.last ) )
		@compound_type = args.last
		args.pop
	else
		@compound_type = :and
	end
	@conditions = args.map { |arg|
		arg.respond_to?( :to_condition ) ? arg.to_condition : arg
	}
	@domain_class = @conditions[0].domain_class
end

Instance Method Details

#dobj_satisfies?(anObj) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/lafcadio/query.rb', line 457

def dobj_satisfies?(anObj)
	if @compound_type == :and
		@conditions.inject( true ) { |result, cond|
			result && cond.dobj_satisfies?( anObj )
		}
	else
		@conditions.inject( false ) { |result, cond|
			result || cond.dobj_satisfies?( anObj )
		}
	end
end

#implied_by?(other_condition) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/lafcadio/query.rb', line 469

def implied_by?( other_condition )
	@compound_type == :or && @conditions.any? { |cond|
		cond.implies?( other_condition )
	}
end

#implies?(other_condition) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/lafcadio/query.rb', line 475

def implies?( other_condition )
	super( other_condition ) or (
		@compound_type == :and and @conditions.any? { |cond|
			cond.implies? other_condition
		}
	) or (
		@compound_type == :or and @conditions.all? { |cond|
			cond.implies? other_condition
		}
	)
end

#to_sql ⇒ Object 



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# File 'lib/lafcadio/query.rb', line 487

def to_sql
	booleanString = @compound_type == :and ? 'and' : 'or'
	subSqlStrings = @conditions.collect { |cond| cond.to_sql }
	"(#{ subSqlStrings.join(" #{ booleanString } ") })"
end