Function build
has 2019 lines of code (exceeds 25 allowed). Consider refactoring. Open
function build() {
var svg = { };
svg.FRAMERATE = 30;
svg.MAX_VIRTUAL_PIXELS = 30000;
File canvas-tools.src.js
has 2486 lines of code (exceeds 250 allowed). Consider refactoring. Open
/**
* @license A class to parse color values
* @author Stoyan Stefanov <sstoo@gmail.com>
* @link http://www.phpied.com/rgb-color-parser-in-javascript/
* Use it if you like it
Function path
has 266 lines of code (exceeds 25 allowed). Consider refactoring. Open
svg.Element.path = function(node) {
this.base = svg.Element.PathElementBase;
this.base(node);
var d = this.attribute('d').value;
Function RGBColor
has 253 lines of code (exceeds 25 allowed). Consider refactoring. Open
function RGBColor(color_string)
{
this.ok = false;
// strip any leading #
Function path
has 156 lines of code (exceeds 25 allowed). Consider refactoring. Open
this.path = function(ctx) {
var pp = this.PathParser;
pp.reset();
var bb = new svg.BoundingBox();
Function RGBColor
has a Cognitive Complexity of 36 (exceeds 5 allowed). Consider refactoring. Open
function RGBColor(color_string)
{
this.ok = false;
// strip any leading #
- Read upRead up
Cognitive Complexity
Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.
A method's cognitive complexity is based on a few simple rules:
- Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
- Code is considered more complex for each "break in the linear flow of the code"
- Code is considered more complex when "flow breaking structures are nested"
Further reading
Function ElementBase
has 109 lines of code (exceeds 25 allowed). Consider refactoring. Open
svg.Element.ElementBase = function(node) {
this.attributes = {};
this.styles = {};
this.children = [];
Function Property
has 97 lines of code (exceeds 25 allowed). Consider refactoring. Open
svg.Property = function(name, value) {
this.name = name;
this.value = value;
this.hasValue = function() {
Function loadXmlDoc
has 88 lines of code (exceeds 25 allowed). Consider refactoring. Open
svg.loadXmlDoc = function(ctx, dom) {
svg.init(ctx);
var mapXY = function(p) {
var e = ctx.canvas;
Function PathParser
has 84 lines of code (exceeds 25 allowed). Consider refactoring. Open
this.PathParser = new (function(d) {
this.tokens = d.split(' ');
this.reset = function() {
this.i = -1;
Function Transform
has 82 lines of code (exceeds 25 allowed). Consider refactoring. Open
svg.Transform = function(v) {
var that = this;
this.Type = {}
// translate
Function BoundingBox
has 81 lines of code (exceeds 25 allowed). Consider refactoring. Open
svg.BoundingBox = function(x1, y1, x2, y2) { // pass in initial points if you want
this.x1 = Number.NaN;
this.y1 = Number.NaN;
this.x2 = Number.NaN;
this.y2 = Number.NaN;
Function TextElementBase
has 79 lines of code (exceeds 25 allowed). Consider refactoring. Open
svg.Element.TextElementBase = function(node) {
this.base = svg.Element.RenderedElementBase;
this.base(node);
this.getGlyph = function(font, text, i) {
Function feGaussianBlur
has 60 lines of code (exceeds 25 allowed). Consider refactoring. Open
svg.Element.feGaussianBlur = function(node) {
this.base = svg.Element.ElementBase;
this.base(node);
function make_fgauss(sigma) {
Function svg
has 57 lines of code (exceeds 25 allowed). Consider refactoring. Open
svg.Element.svg = function(node) {
this.base = svg.Element.RenderedElementBase;
this.base(node);
this.baseClearContext = this.clearContext;
Function text
has 55 lines of code (exceeds 25 allowed). Consider refactoring. Open
svg.Element.text = function(node) {
this.base = svg.Element.RenderedElementBase;
this.base(node);
if (node != null) {
Function AnimateBase
has 52 lines of code (exceeds 25 allowed). Consider refactoring. Open
svg.Element.AnimateBase = function(node) {
this.base = svg.Element.ElementBase;
this.base(node);
svg.Animations.push(this);
Function configure
has 51 lines of code (exceeds 25 allowed). Consider refactoring. Open
configure: function (chart) {
var renderer = this,
options = chart.options.tooltip,
borderWidth = options.borderWidth,
tooltipDiv = renderer.ttDiv,
Function setContext
has 47 lines of code (exceeds 25 allowed). Consider refactoring. Open
this.setContext = function(ctx) {
// initial values
ctx.strokeStyle = 'rgba(0,0,0,0)';
ctx.lineCap = 'butt';
ctx.lineJoin = 'miter';
Function RenderedElementBase
has 45 lines of code (exceeds 25 allowed). Consider refactoring. Open
svg.Element.RenderedElementBase = function(node) {
this.base = svg.Element.ElementBase;
this.base(node);
this.setContext = function(ctx) {
Function style
has 45 lines of code (exceeds 25 allowed). Consider refactoring. Open
svg.Element.style = function(node) {
this.base = svg.Element.ElementBase;
this.base(node);
// text, or spaces then CDATA
Function GradientBase
has 45 lines of code (exceeds 25 allowed). Consider refactoring. Open
svg.Element.GradientBase = function(node) {
this.base = svg.Element.ElementBase;
this.base(node);
this.gradientUnits = this.attribute('gradientUnits').valueOrDefault('objectBoundingBox');
Function setContext
has 41 lines of code (exceeds 25 allowed). Consider refactoring. Open
this.setContext = function(ctx) {
// fill
if (this.style('fill').Definition.isUrl()) {
var fs = this.style('fill').Definition.getFillStyle(this);
if (fs != null) ctx.fillStyle = fs;
Function canvg
has 39 lines of code (exceeds 25 allowed). Consider refactoring. Open
this.canvg = function (target, s, opts) {
// no parameters
if (target == null && s == null && opts == null) {
var svgTags = document.getElementsByTagName('svg');
for (var i=0; i<svgTags.length; i++) {
Function Mouse
has 38 lines of code (exceeds 25 allowed). Consider refactoring. Open
svg.Mouse = new (function() {
this.events = [];
this.hasEvents = function() { return this.events.length != 0; }
this.onclick = function(x, y) {
Function filter
has 35 lines of code (exceeds 25 allowed). Consider refactoring. Open
svg.Element.filter = function(node) {
this.base = svg.Element.ElementBase;
this.base(node);
this.apply = function(ctx, element) {
Function addBezierCurve
has 35 lines of code (exceeds 25 allowed). Consider refactoring. Open
this.addBezierCurve = function(p0x, p0y, p1x, p1y, p2x, p2y, p3x, p3y) {
// from http://blog.hackers-cafe.net/2009/06/how-to-calculate-bezier-curves-bounding.html
var p0 = [p0x, p0y], p1 = [p1x, p1y], p2 = [p2x, p2y], p3 = [p3x, p3y];
this.addPoint(p0[0], p0[1]);
this.addPoint(p3[0], p3[1]);
Function PathElementBase
has 35 lines of code (exceeds 25 allowed). Consider refactoring. Open
svg.Element.PathElementBase = function(node) {
this.base = svg.Element.RenderedElementBase;
this.base(node);
this.path = function(ctx) {
Function draw
has 34 lines of code (exceeds 25 allowed). Consider refactoring. Open
var draw = function() {
svg.ViewPort.Clear();
if (ctx.canvas.parentNode) svg.ViewPort.SetCurrent(ctx.canvas.parentNode.clientWidth, ctx.canvas.parentNode.clientHeight);
if (svg.opts['ignoreDimensions'] != true) {
Function getHelpXML
has 33 lines of code (exceeds 25 allowed). Consider refactoring. Open
this.getHelpXML = function () {
var examples = new Array();
// add regexps
for (var i = 0; i < color_defs.length; i++) {
Function renderChildren
has 33 lines of code (exceeds 25 allowed). Consider refactoring. Open
this.renderChildren = function(ctx) {
var textAnchor = this.style('text-anchor').valueOrDefault('start');
var x = this.attribute('x').Length.toPixels('x');
var y = this.attribute('y').Length.toPixels('y');
for (var i=0; i<this.children.length; i++) {
Function createGradient
has 33 lines of code (exceeds 25 allowed). Consider refactoring. Open
this.createGradient = function(ctx, element) {
var stopsContainer = this;
if (this.attribute('xlink:href').hasValue()) {
stopsContainer = this.attribute('xlink:href').Definition.getDefinition();
}
Function AspectRatio
has 10 arguments (exceeds 4 allowed). Consider refactoring. Open
svg.AspectRatio = function(ctx, aspectRatio, width, desiredWidth, height, desiredHeight, minX, minY, refX, refY) {
Function setContainer
has 31 lines of code (exceeds 25 allowed). Consider refactoring. Open
setContainer: function (container, chartWidth, chartHeight) {
var containerStyle = container.style,
containerParent = container.parentNode,
containerLeft = containerStyle.left,
containerTop = containerStyle.top,
Function a
has 30 lines of code (exceeds 25 allowed). Consider refactoring. Open
svg.Element.a = function(node) {
this.base = svg.Element.TextElementBase;
this.base(node);
this.hasText = true;
Function Font
has 29 lines of code (exceeds 25 allowed). Consider refactoring. Open
svg.Font = new (function() {
this.Styles = ['normal','italic','oblique','inherit'];
this.Variants = ['normal','small-caps','inherit'];
this.Weights = ['normal','bold','bolder','lighter','100','200','300','400','500','600','700','800','900','inherit'];
Function renderChildren
has 29 lines of code (exceeds 25 allowed). Consider refactoring. Open
this.renderChildren = function(ctx) {
var customFont = this.parent.style('font-family').Definition.getDefinition();
if (customFont != null) {
var fontSize = this.parent.style('font-size').numValueOrDefault(svg.Font.Parse(svg.ctx.font).fontSize);
var fontStyle = this.parent.style('font-style').valueOrDefault(svg.Font.Parse(svg.ctx.font).fontStyle);
Function font
has 29 lines of code (exceeds 25 allowed). Consider refactoring. Open
svg.Element.font = function(node) {
this.base = svg.Element.ElementBase;
this.base(node);
this.horizAdvX = this.attribute('horiz-adv-x').numValue();
Function apply
has 29 lines of code (exceeds 25 allowed). Consider refactoring. Open
this.apply = function(ctx, element) {
// render as temp svg
var bb = element.getBoundingBox();
var x = this.attribute('x').Length.toPixels('x');
var y = this.attribute('y').Length.toPixels('y');
Function mask
has 28 lines of code (exceeds 25 allowed). Consider refactoring. Open
svg.Element.mask = function(node) {
this.base = svg.Element.ElementBase;
this.base(node);
this.apply = function(ctx, element) {
Function update
has 28 lines of code (exceeds 25 allowed). Consider refactoring. Open
this.update = function(delta) {
// set initial value
if (this.initialValue == null) {
this.initialValue = this.getProperty().value;
}
Function radialGradient
has 27 lines of code (exceeds 25 allowed). Consider refactoring. Open
svg.Element.radialGradient = function(node) {
this.base = svg.Element.GradientBase;
this.base(node);
this.getGradient = function(ctx, element) {
Function image
has 27 lines of code (exceeds 25 allowed). Consider refactoring. Open
svg.Element.image = function(node) {
this.base = svg.Element.RenderedElementBase;
this.base(node);
svg.Images.push(this);
Function rect
has 26 lines of code (exceeds 25 allowed). Consider refactoring. Open
svg.Element.rect = function(node) {
this.base = svg.Element.PathElementBase;
this.base(node);
this.path = function(ctx) {
Function addBezierCurve
has 8 arguments (exceeds 4 allowed). Consider refactoring. Open
this.addBezierCurve = function(p0x, p0y, p1x, p1y, p2x, p2y, p3x, p3y) {
Function imSet
has 7 arguments (exceeds 4 allowed). Consider refactoring. Open
function imSet(img, x, y, width, height, rgba, val) {
Avoid deeply nested control flow statements. Open
if (typeof(this.glyphs[child.unicode]) == 'undefined') this.glyphs[child.unicode] = [];
Function CreateFont
has 6 arguments (exceeds 4 allowed). Consider refactoring. Open
this.CreateFont = function(fontStyle, fontVariant, fontWeight, fontSize, fontFamily, inherit) {
Function addQuadraticCurve
has 6 arguments (exceeds 4 allowed). Consider refactoring. Open
this.addQuadraticCurve = function(p0x, p0y, p1x, p1y, p2x, p2y) {
Avoid deeply nested control flow statements. Open
else if (!set.fontWeight && that.Weights.indexOf(d[i]) != -1) { if (d[i] != 'inherit') f.fontWeight = d[i]; set.fontStyle = set.fontVariant = set.fontWeight = true; }
Function imGet
has 6 arguments (exceeds 4 allowed). Consider refactoring. Open
function imGet(img, x, y, width, height, rgba) {
Avoid deeply nested control flow statements. Open
for (var name in styles) {
this.styles[name] = styles[name];
}
Avoid deeply nested control flow statements. Open
for (var name in styles) {
this.styles[name] = styles[name];
}
Avoid deeply nested control flow statements. Open
for (var k=0; k<cssProps.length; k++) {
var prop = cssProps[k].indexOf(':');
var name = cssProps[k].substr(0, prop);
var value = cssProps[k].substr(prop + 1, cssProps[k].length - prop);
if (name != null && value != null) {
Avoid deeply nested control flow statements. Open
else if (!set.fontSize) { if (d[i] != 'inherit') f.fontSize = d[i].split('/')[0]; set.fontStyle = set.fontVariant = set.fontWeight = set.fontSize = true; }
else { if (d[i] != 'inherit') ff += d[i]; }
Avoid deeply nested control flow statements. Open
if (cssClass == '@font-face') {
var fontFamily = props['font-family'].value.replace(/"/g,'');
var srcs = props['src'].value.split(',');
for (var s=0; s<srcs.length; s++) {
if (srcs[s].indexOf('format("svg")') > 0) {
Function convolve_even
has 5 arguments (exceeds 4 allowed). Consider refactoring. Open
function convolve_even(src, dst, mask, width, height) {
Function drawSvg
has 5 arguments (exceeds 4 allowed). Consider refactoring. Open
CanvasRenderingContext2D.prototype.drawSvg = function(s, dx, dy, dw, dh) {
Function apply
has 5 arguments (exceeds 4 allowed). Consider refactoring. Open
this.apply = function(ctx, x, y, width, height) {
Avoid too many return
statements within this function. Open
if (s.match(/%$/)) return that.numValue() * svg.ViewPort.ComputeSize(viewPort);
Avoid too many return
statements within this function. Open
return that.numValue();
Avoid too many return
statements within this function. Open
if (s.match(/mm$/)) return that.numValue() * this.DPI(viewPort) / 25.4;
Avoid too many return
statements within this function. Open
if (s.match(/in$/)) return that.numValue() * this.DPI(viewPort);
Avoid too many return
statements within this function. Open
if (s.match(/cm$/)) return that.numValue() * this.DPI(viewPort) / 2.54;
Avoid too many return
statements within this function. Open
if (s.match(/pt$/)) return that.numValue() * 1.25;
Avoid too many return
statements within this function. Open
return that.numValue() * (Math.PI / 180.0);
Avoid too many return
statements within this function. Open
if (s.match(/pc$/)) return that.numValue() * 15;
TODO found Open
return 96.0; // TODO: compute?
- Exclude checks
TODO found Open
bb.addPoint(cp.x, cp.y); // TODO: this is too naive, make it better
- Exclude checks
TODO found Open
// TODO: convert to real lexer based on http://www.w3.org/TR/SVG11/paths.html#PathDataBNF
- Exclude checks
Identical blocks of code found in 3 locations. Consider refactoring. Open
(function(){
// canvg(target, s)
// empty parameters: replace all 'svg' elements on page with 'canvas' elements
// target: canvas element or the id of a canvas element
// s: svg string, url to svg file, or xml document
- Read upRead up
Duplicated Code
Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:
Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.
When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).
Tuning
This issue has a mass of 34908.
We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.
The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.
If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.
See codeclimate-duplication
's documentation for more information about tuning the mass threshold in your .codeclimate.yml
.
Refactorings
- Extract Method
- Extract Class
- Form Template Method
- Introduce Null Object
- Pull Up Method
- Pull Up Field
- Substitute Algorithm
Further Reading
- Don't Repeat Yourself on the C2 Wiki
- Duplicated Code on SourceMaking
- Refactoring: Improving the Design of Existing Code by Martin Fowler. Duplicated Code, p76
Identical blocks of code found in 3 locations. Consider refactoring. Open
function RGBColor(color_string)
{
this.ok = false;
// strip any leading #
- Read upRead up
Duplicated Code
Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:
Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.
When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).
Tuning
This issue has a mass of 2037.
We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.
The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.
If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.
See codeclimate-duplication
's documentation for more information about tuning the mass threshold in your .codeclimate.yml
.
Refactorings
- Extract Method
- Extract Class
- Form Template Method
- Introduce Null Object
- Pull Up Method
- Pull Up Field
- Substitute Algorithm
Further Reading
- Don't Repeat Yourself on the C2 Wiki
- Duplicated Code on SourceMaking
- Refactoring: Improving the Design of Existing Code by Martin Fowler. Duplicated Code, p76
Similar blocks of code found in 3 locations. Consider refactoring. Open
(function (Highcharts) { // encapsulate
var UNDEFINED,
DIV = 'div',
ABSOLUTE = 'absolute',
RELATIVE = 'relative',
- Read upRead up
Duplicated Code
Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:
Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.
When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).
Tuning
This issue has a mass of 1275.
We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.
The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.
If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.
See codeclimate-duplication
's documentation for more information about tuning the mass threshold in your .codeclimate.yml
.
Refactorings
- Extract Method
- Extract Class
- Form Template Method
- Introduce Null Object
- Pull Up Method
- Pull Up Field
- Substitute Algorithm
Further Reading
- Don't Repeat Yourself on the C2 Wiki
- Duplicated Code on SourceMaking
- Refactoring: Improving the Design of Existing Code by Martin Fowler. Duplicated Code, p76
Similar blocks of code found in 3 locations. Consider refactoring. Open
if (CanvasRenderingContext2D) {
CanvasRenderingContext2D.prototype.drawSvg = function(s, dx, dy, dw, dh) {
canvg(this.canvas, s, {
ignoreMouse: true,
ignoreAnimation: true,
- Read upRead up
Duplicated Code
Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:
Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.
When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).
Tuning
This issue has a mass of 90.
We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.
The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.
If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.
See codeclimate-duplication
's documentation for more information about tuning the mass threshold in your .codeclimate.yml
.
Refactorings
- Extract Method
- Extract Class
- Form Template Method
- Introduce Null Object
- Pull Up Method
- Pull Up Field
- Substitute Algorithm
Further Reading
- Don't Repeat Yourself on the C2 Wiki
- Duplicated Code on SourceMaking
- Refactoring: Improving the Design of Existing Code by Martin Fowler. Duplicated Code, p76
Identical blocks of code found in 3 locations. Consider refactoring. Open
if(!Array.prototype.indexOf){
Array.prototype.indexOf = function(obj){
for(var i=0; i<this.length; i++){
if(this[i]==obj){
return i;
- Read upRead up
Duplicated Code
Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:
Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.
When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).
Tuning
This issue has a mass of 88.
We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.
The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.
If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.
See codeclimate-duplication
's documentation for more information about tuning the mass threshold in your .codeclimate.yml
.
Refactorings
- Extract Method
- Extract Class
- Form Template Method
- Introduce Null Object
- Pull Up Method
- Pull Up Field
- Substitute Algorithm
Further Reading
- Don't Repeat Yourself on the C2 Wiki
- Duplicated Code on SourceMaking
- Refactoring: Improving the Design of Existing Code by Martin Fowler. Duplicated Code, p76
Identical blocks of code found in 3 locations. Consider refactoring. Open
if(!window.console) {
window.console = {};
window.console.log = function(str) {};
window.console.dir = function(str) {};
}
- Read upRead up
Duplicated Code
Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:
Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.
When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).
Tuning
This issue has a mass of 69.
We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.
The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.
If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.
See codeclimate-duplication
's documentation for more information about tuning the mass threshold in your .codeclimate.yml
.
Refactorings
- Extract Method
- Extract Class
- Form Template Method
- Introduce Null Object
- Pull Up Method
- Pull Up Field
- Substitute Algorithm
Further Reading
- Don't Repeat Yourself on the C2 Wiki
- Duplicated Code on SourceMaking
- Refactoring: Improving the Design of Existing Code by Martin Fowler. Duplicated Code, p76