Class: ChangesetSelector

Inherits:
Object
  • Object
show all
Defined in:
lib/vcseif/connection.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(condition) ⇒ ChangesetSelector

Returns a new instance of ChangesetSelector.



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# File 'lib/vcseif/connection.rb', line 12

def initialize(condition)
    """
        A ChangesetSelector instance is of the form: 
            attribute relational_operator value_or_expression
        Prime our 3 instance attributes of interest in case the regex match fails
    """
    @attribute = ""
    @relation  = ""
    @value     = ""
    # define our extractor regex to handle a string with "attribute relation value_or_expression_that_may have spaces"
    # examples: 'Revision = 4' or 'Author = NilsLofgren' or "CommitTimestamp >= '2012-09-12T17:32:49.000Z'"
    # We only support these relational operators (=, !=, <, <=, >, >=) 
    attr_identifier_pattern = '[a-zA-Z@$%&*].*[a-zA-Z0-9_@$%&*]+'
    relational_operators     = ['=', '!=', '<', '<=', '>', '>=']
    relations = "%s" % [relational_operators.join('|')]
    selector_pattern_spec = "^(?<attribute>%s)\s+(?<relation>%s)\s+(?<value>.+)$" % [attr_identifier_pattern, relations]

    selector_patt = Regexp.compile(selector_pattern_spec)
    md = selector_patt.match(condition)
    if not md.nil?
        @attribute = md[:attribute].strip()
        @relation  = md[:relation]
        @value     = md[:value].strip()
    end
    if (@attribute.empty? or @relation.empty? or @value.empty?)
        problem = "Invalid Changeset Selector specification: %s" % condition
        confex = VCSEIF_Exceptions::ConfigurationError.new(problem)
        raise confex, problem
    end
end

Instance Attribute Details

#attribute ⇒ Object

Returns the value of attribute attribute.



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# File 'lib/vcseif/connection.rb', line 10

def attribute
  @attribute
end

#relation ⇒ Object

Returns the value of attribute relation.



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# File 'lib/vcseif/connection.rb', line 10

def relation
  @relation
end

#value ⇒ Object

Returns the value of attribute value.



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# File 'lib/vcseif/connection.rb', line 10

def value
  @value
end