Package soot.toolkits.astmetrics

Class IdentifiersMetric

  • All Implemented Interfaces:
    MetricInterface
    public class IdentifiersMetric
extends ASTMetric
    Author:
    Michael Batchelder Created on 5-Mar-2006

    • Constructor Detail

      • IdentifiersMetric

        public IdentifiersMetric​(polyglot.ast.Node astNode)
        Parameters:
        astNode - This metric will take a measure of the "complexity" of each identifier used within the program. An identifier's complexity is computed as follows: First the alpha tokens are parsed by splitting on non-alphas and capitals: example identifier: getASTNode alpha tokens: get, AST, Node example identifier: ___Junk$$name alpha tokens: Junk, name) The alpha tokens are then counted and a 'token complexity' is formed by the ratio of total tokens to the number of tokens found in the dictionary: example identifier: getASTNode Total: 3, Found: 2, Complexity: 1.5 Then the 'character complexity' is computed, which is a ratio of total number of characters to the number of non-complex characters. Non-complex characters are those which are NOT part of a multiple string of non-alphas. example identifier: ___Junk$$name complex char strings: '___', '$$' number of non-complex (Junk + name): 8, total: 13, Complexity: 1.625 Finally, the total identifier complexity is the sum of the token and character complexities multipled by the 'importance' of an identifier: Multipliers are as follows: Class multiplier = 3; Method multiplier = 4; Field multiplier = 2; Formal multiplier = 1.5; Local multiplier = 1;

    • Method Detail

      • reset

        public void reset()
        Specified by:
        reset in class ASTMetric

      • enter

        public polyglot.visit.NodeVisitor enter​(polyglot.ast.Node parent,
                                        polyglot.ast.Node n)
        Overrides:
        enter in class polyglot.visit.NodeVisitor