[stringtemplate-interest] Map usage

[D. Frej]

Hi,

here is the situation that I want to get solved: in Java I have an array containing Integer (the Object, not the primitive type int). 

Integer[] ar = new Integer[7];
ar[0] = 8;
ar[1] = 3;
ar[2] = 5;
ar[3] = 8;
ar[4] = 7;
ar[5] = 5;
ar[6] = 9;

This array contains duplicates (on purpose). The output I want to have - using stringtemplate - is the following

1	8	occurs in the array more than 1 time
2	3	
3	5	occurs in the array more than 1 time
and so on

Printing the array is easy. Using (Java code)

StringTemplateGroup stGroup = new StringTemplateGroup("mygroup", "C:\\workspace");
StringTemplate st = stGroup.getInstanceOf("jexample");
st.setAttribute("numbers", ar);
System.out.println(st.toString());

and the template

junitclass(numbers) ::= <<
$numbers:{ a | $i$\t$a$ }$
>>

As far as I have seen in the documentation, there is no way that I can call a method on a Java object. Since it is possible to retrieve attributes one way to undermine this is to create a method in the Java object starting with getXYZ() and print out object.xyz. Is it correct that I cannot pass a parameter into the method from the template? Equivalent to a call in Java like object.getXYZ(i).

Did I understand correctly that the proposed way would be to create a map containing the values of the array as keys (in the example 3, 5, 7, 8, 9) and the value of the map is the number of occurances? How would the code look alike?

And: how can I find out if a certain key is in the map or not? E.g. if I checked for the key '4' (if 4 is a key in the map), how can print out some message stating that it "is not in the map"?

Thanks in advance,

Didi
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