Intercept field access using Java Instrumentation

Question

I am building a profiler Using Java Instrumentation + Javaassit to intercept all the method, constructor calls. I would also like to intercept the Class Field access (Would like to monitor the static fields data to prevent misuse).

Class A { public static String data = "1"; public static void main(String[] s) { //I would like to intercept this field access System.out.println(data); //I would like to intercept this field data modification data ="2"; } }

Is this possible to intercept them? Thanks in Advance

kutschkem · Accepted Answer · 2018-06-22 12:14:27Z

Javassist's FieldAccess has a method replace which replaces the field access with your own code. I suppose this could be used to achieve what you want.

See also http://www.javassist.org/html/javassist/expr/ExprEditor.html

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