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home > news > java technology > stringtemplate part 3: complex data types and renderers

StringTemplate Part 3: Complex Data Types and Renderers

In Part 1 and Part 2 we dealt with simple data types who's string representation is well known. Complex data types may not have a string representation that meets the needs of a particular template. // Example 1: Some objects don't have a useful toString() Object objectParamater = new Object(); StringTemplate template = new StringTemplate("Hello $param$ !"); template.setAttribute("param", objectParamater); System.out.println(template); Output: Hello java.lang.Object@18eb9e6 ! Your output will very but I think it's safe to say that in most cases this output is undesirable. Here is another example of a well intentioned toString() that just won't do for our purposes. //Example 2: Even a well intentioned toString() methods may not be useful. Planet mars = createMars(); template = new StringTemplate("Hello $param$ !"); template.setAttribute("param", mars); System.out.println("Example 2:"); System.out.println(template); Output: Example 2: Hello Planet [atmosphere=CO2 N2, diameter=0.532, inclinationToSunsEquator=5.65, mass=0.11, moons=[Phobos, Deimos], name=Mars, orbitalEccentricity=0.093, orbitalPeriod=1.88, orbitalRadius=1.52, rings=false, rotationPeriod=1.03] ! For object that follow the JavaBean specification (getters and setters) StringTemplate provides property access via the “.” notation. This allows you to access properties from within your template. //Example 3: Dot notati...


Date: June, 07 2010
Url: http://www.java.net/blog/aberrant/archive/2010/06/07/stringtemplate-part-3-complex-data-types-and-renderers


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