Example usage for org.objectweb.asm ClassVisitor ClassVisitor

Introduction

In this page you can find the example usage for org.objectweb.asm ClassVisitor ClassVisitor.

Prototype

public ClassVisitor(final int api)

Source Link

Document

Constructs a new ClassVisitor .

Usage

From source file:scouter.agent.DirectPatch.java

License:Apache License

private static String getClassName(byte[] bytes) {
    try {//from w w  w .ja va2s  . com
        final ClassDesc classDesc = new ClassDesc();
        ClassReader cr = new ClassReader(bytes);
        cr.accept(new ClassVisitor(Opcodes.ASM7) {
            public void visit(int version, int access, String name, String signature, String superName,
                    String[] interfaces) {
                classDesc.set(version, access, name, signature, superName, interfaces);
            }
        }, 0);
        return classDesc.name.replace('.', '/');
    } catch (Throwable t) {
        return null;
    }
}

From source file:scouter.agent.LambdaFormTransformer.java

License:Apache License

public byte[] transform(final ClassLoader loader, String className, final Class classBeingRedefined,
        ProtectionDomain protectionDomain, byte[] classfileBuffer, String lambdaMethodName,
        String lambdaMethodDesc, String factoryMethodName, String factoryMethodDesc)
        throws IllegalClassFormatException {
    try {/*from   w w  w . j  av a2 s .c om*/
        if (className == null)
            return null;

        boolean scoped = false;

        for (int i = 0; i < scanScopePrefix.size(); i++) {
            if (className.indexOf(scanScopePrefix.get(i)) == 0) {
                scoped = true;
                break;
            }
        }

        if (!scoped) {
            return null;
        }

        final ClassDesc classDesc = new ClassDesc();
        ClassReader cr = new ClassReader(classfileBuffer);
        cr.accept(new ClassVisitor(Opcodes.ASM7) {
            public void visit(int version, int access, String name, String signature, String superName,
                    String[] interfaces) {
                classDesc.set(version, access, name, signature, superName, interfaces);
                super.visit(version, access, name, signature, superName, interfaces);
            }
        }, 0);
        if (AsmUtil.isInterface(classDesc.access)) {
            return null;
        }
        classDesc.classBeingRedefined = classBeingRedefined;
        ClassWriter cw = getClassWriter(classDesc);
        ClassVisitor cv = cw;
        List<ILASM> workAsms = asms;
        for (int i = workAsms.size() - 1; i >= 0; i--) {
            cv = workAsms.get(i).transform(cv, className, classDesc, lambdaMethodName, lambdaMethodDesc,
                    factoryMethodName, factoryMethodDesc);
            if (cv != cw) {
                cr = new ClassReader(classfileBuffer);
                cr.accept(cv, ClassReader.EXPAND_FRAMES);
                classfileBuffer = cw.toByteArray();
                cv = cw = getClassWriter(classDesc);
            }
        }
        return classfileBuffer;
    } catch (Throwable t) {
        Logger.println("B101", "LambdaFormTransformer Error", t);
        t.printStackTrace();
    } finally {
    }
    return null;
}

From source file:se.eris.functional.nested.NestedAnnotatedInstrumenterTest.java

License:Apache License

private List<AsmInnerClass> getAsmInnerClasses(final ClassReader cr) {
    final List<AsmInnerClass> asmInnerClasses = new ArrayList<>();
    cr.accept(new ClassVisitor(AsmUtils.ASM_OPCODES_VERSION) {
        @Override//from w  w  w .  jav  a2s .co  m
        public void visitInnerClass(final String name, final String outerName, final String innerName,
                final int access) {
            asmInnerClasses.add(new AsmInnerClass(name, outerName, innerName, access));
        }
    }, 0);
    return asmInnerClasses;
}

From source file:se.eris.functional.nested.NestedAnnotatedInstrumenterTest.java

License:Apache License

@NotNull
private List<String> getStringConstants(final ClassReader cr, final String methodName) {
    final List<String> strings = new ArrayList<>();
    cr.accept(new ClassVisitor(AsmUtils.ASM_OPCODES_VERSION) {
        @Override//from   ww  w  .j  a  v a2 s  .  co  m
        public MethodVisitor visitMethod(final int access, final String name, final String desc,
                final String signature, final String[] exceptions) {
            if (name.equals(methodName)) {
                return new MethodVisitor(AsmUtils.ASM_OPCODES_VERSION) {
                    @Override
                    public void visitLdcInsn(final Object cst) {
                        if (cst instanceof String) {
                            strings.add(desc + ":" + cst);
                        }
                    }
                };
            }
            return super.visitMethod(access, name, desc, signature, exceptions);
        }
    }, 0);
    return strings;
}