Semmle Code - Sample Query in .QL

Sample Query in .QL

To illustrate the use of .QL, consider the well-known rule in object-oriented programming that public fields should be declared final. To find violations of that rule, we should search for fields that are public but not final. In .QL, that requirement is expressed as follows:

from Field f where f.hasModifier("public") and not(f.hasModifier("final")) select f.getDeclaringType.getPackage, f.getDeclaringType, f

Here we select not only the offending field f, but also the package and type in which its declaration occurs.

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