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module Arel
module Visitors
class DepthFirst < Arel::Visitors::Visitor
def initialize block = nil
@block = block || Proc.new
end
private
def visit o
super
@block.call o
end
def unary o
visit o.expr
end
alias :visit_Arel_Nodes_Group :unary
alias :visit_Arel_Nodes_Grouping :unary
alias :visit_Arel_Nodes_Having :unary
alias :visit_Arel_Nodes_Limit :unary
alias :visit_Arel_Nodes_Not :unary
alias :visit_Arel_Nodes_Offset :unary
alias :visit_Arel_Nodes_On :unary
alias :visit_Arel_Nodes_Ordering :unary
alias :visit_Arel_Nodes_Ascending :unary
alias :visit_Arel_Nodes_Descending :unary
alias :visit_Arel_Nodes_Top :unary
alias :visit_Arel_Nodes_UnqualifiedColumn :unary
def function o
visit o.expressions
visit o.alias
visit o.distinct
end
alias :visit_Arel_Nodes_Avg :function
alias :visit_Arel_Nodes_Exists :function
alias :visit_Arel_Nodes_Max :function
alias :visit_Arel_Nodes_Min :function
alias :visit_Arel_Nodes_Sum :function
def visit_Arel_Nodes_NamedFunction o
visit o.name
visit o.expressions
visit o.distinct
visit o.alias
end
def visit_Arel_Nodes_Count o
visit o.expressions
visit o.alias
visit o.distinct
end
def nary o
o.children.each { |child| visit child }
end
alias :visit_Arel_Nodes_And :nary
def binary o
visit o.left
visit o.right
end
alias :visit_Arel_Nodes_As :binary
alias :visit_Arel_Nodes_Assignment :binary
alias :visit_Arel_Nodes_Between :binary
alias :visit_Arel_Nodes_DeleteStatement :binary
alias :visit_Arel_Nodes_DoesNotMatch :binary
alias :visit_Arel_Nodes_Equality :binary
alias :visit_Arel_Nodes_GreaterThan :binary
alias :visit_Arel_Nodes_GreaterThanOrEqual :binary
alias :visit_Arel_Nodes_In :binary
alias :visit_Arel_Nodes_JoinSource :binary
alias :visit_Arel_Nodes_InnerJoin :binary
alias :visit_Arel_Nodes_LessThan :binary
alias :visit_Arel_Nodes_LessThanOrEqual :binary
alias :visit_Arel_Nodes_Matches :binary
alias :visit_Arel_Nodes_NotEqual :binary
alias :visit_Arel_Nodes_NotIn :binary
alias :visit_Arel_Nodes_Or :binary
alias :visit_Arel_Nodes_OuterJoin :binary
alias :visit_Arel_Nodes_TableAlias :binary
alias :visit_Arel_Nodes_Values :binary
def visit_Arel_Nodes_StringJoin o
visit o.left
end
def visit_Arel_Attribute o
visit o.relation
visit o.name
end
alias :visit_Arel_Attributes_Integer :visit_Arel_Attribute
alias :visit_Arel_Attributes_Float :visit_Arel_Attribute
alias :visit_Arel_Attributes_String :visit_Arel_Attribute
alias :visit_Arel_Attributes_Time :visit_Arel_Attribute
alias :visit_Arel_Attributes_Boolean :visit_Arel_Attribute
alias :visit_Arel_Attributes_Attribute :visit_Arel_Attribute
alias :visit_Arel_Attributes_Decimal :visit_Arel_Attribute
def visit_Arel_Table o
visit o.name
end
def terminal o
end
alias :visit_ActiveSupport_Multibyte_Chars :terminal
alias :visit_ActiveSupport_StringInquirer :terminal
alias :visit_Arel_Nodes_Lock :terminal
alias :visit_Arel_Nodes_Node :terminal
alias :visit_Arel_Nodes_SqlLiteral :terminal
alias :visit_Arel_SqlLiteral :terminal
alias :visit_BigDecimal :terminal
alias :visit_Bignum :terminal
alias :visit_Class :terminal
alias :visit_Date :terminal
alias :visit_DateTime :terminal
alias :visit_FalseClass :terminal
alias :visit_Fixnum :terminal
alias :visit_Float :terminal
alias :visit_NilClass :terminal
alias :visit_String :terminal
alias :visit_Symbol :terminal
alias :visit_Time :terminal
alias :visit_TrueClass :terminal
def visit_Arel_Nodes_InsertStatement o
visit o.relation
visit o.columns
visit o.values
end
def visit_Arel_Nodes_SelectCore o
visit o.projections
visit o.source
visit o.wheres
visit o.groups
visit o.having
end
def visit_Arel_Nodes_SelectStatement o
visit o.cores
visit o.orders
visit o.limit
visit o.lock
visit o.offset
end
def visit_Arel_Nodes_UpdateStatement o
visit o.relation
visit o.values
visit o.wheres
visit o.orders
visit o.limit
end
def visit_Array o
o.each { |i| visit i }
end
def visit_Hash o
o.each { |k,v| visit(k); visit(v) }
end
end
end
end
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