Examples of javassist.bytecode.analysis.Analyzer

javassist.bytecode.analysis.Analyzer

od to analyze public Object doSomething(int x) { Number n; if (x < 5) { n = new Double(0); } else { n = new Long(0); } return n; } // Which compiles to: // 0: iload_1 // 1: iconst_5 // 2: if_icmpge 17 // 5: new #18; //class java/lang/Double // 8: dup // 9: dconst_0 // 10: invokespecial #44; //Method java/lang/Double."":(D)V // 13: astore_2 // 14: goto 26 // 17: new #16; //class java/lang/Long // 20: dup // 21: lconst_1 // 22: invokespecial #47; //Method java/lang/Long."":(J)V // 25: astore_2 // 26: aload_2 // 27: areturn public void analyzeIt(CtClass clazz, MethodInfo method) { Analyzer analyzer = new Analyzer(); Frame[] frames = analyzer.analyze(clazz, method); frames[0].getLocal(0).getCtClass(); // returns clazz; frames[0].getLocal(1).getCtClass(); // returns java.lang.String frames[1].peek(); // returns Type.INTEGER frames[27].peek().getCtClass(); // returns java.lang.Number } @see FramePrinter @author Jason T. Greene

        fail("Invalid code should have triggered a BadBytecode exception");
    }


    public void testCodeFalloff() throws Exception {
        CtMethod method = generateCodeFalloff(ClassPool.getDefault());
        Analyzer analyzer = new Analyzer();
        try {
            analyzer.analyze(method.getDeclaringClass(), method.getMethodInfo2());
        } catch (BadBytecode e) {
            return;
        }


        fail("Code falloff should have triggered a BadBytecode exception");

        fail("Code falloff should have triggered a BadBytecode exception");
    }


    public void testJsrMerge() throws Exception {
        CtMethod method = generateJsrMerge(ClassPool.getDefault());
        Analyzer analyzer = new Analyzer();
        analyzer.analyze(method.getDeclaringClass(), method.getMethodInfo2());
        verifyReturn(method, "java.lang.String");
    }

        verifyReturn(method, "java.lang.String");
    }


    public void testJsrMerge2() throws Exception {
        CtMethod method = generateJsrMerge2(ClassPool.getDefault());
        Analyzer analyzer = new Analyzer();
        analyzer.analyze(method.getDeclaringClass(), method.getMethodInfo2());
        verifyReturn(method, "java.lang.String");
    }

Examples of javassist.bytecode.analysis.Analyzer

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