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

ClassVisitor

Source Link

Usage

From source file:com.smartitengineering.util.simple.DefaultClassScannerImplTest.java

License:Open Source License

@Override
protected void setUp() throws Exception {
    super.setUp();
    classScanner = IOFactory.getDefaultClassScanner();
    classVisitor = new ClassVisitor() {

        public void visit(int verison, int scope, String name, String signature, String supername,
                String[] interfaces) {
            assertEquals((scope & Opcodes.ACC_PUBLIC), Opcodes.ACC_PUBLIC);
            assert (name.startsWith(TestClass.class.getName().replaceAll("\\.", "/")));
            System.out.println();
        }//  ww  w.j  a  v  a2 s .  c o m

        public void visitSource(String arg0, String arg1) {
        }

        public void visitOuterClass(String arg0, String arg1, String arg2) {
        }

        public AnnotationVisitor visitAnnotation(String desc, boolean visible) {
            return null;
        }

        public void visitAttribute(Attribute arg0) {
        }

        public void visitInnerClass(String arg0, String arg1, String arg2, int arg3) {
        }

        public FieldVisitor visitField(int arg0, String arg1, String arg2, String arg3, Object arg4) {
            return null;
        }

        public MethodVisitor visitMethod(int arg0, String arg1, String arg2, String arg3, String[] arg4) {
            return null;
        }

        public void visitEnd() {
        }
    };
}

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From source file:org.eclipse.ocl.examples.codegen.java.JavaAnnotationReader.java

License:Open Source License

/**
 * Return true for an @NonNull annotation, false for an @Nullable annotation, null otherwise.
 *///from  w  w  w. java2  s .  c  om
public Boolean getIsNonNull(@NonNull Method method) {
    final String className = method.getDeclaringClass().getName();
    final String requiredDesc = className + ";" + method.getName() + Type.getMethodDescriptor(method);
    Boolean state = desc2state.get(requiredDesc);
    if (state != null) {
        return state;
    }
    if (!readClasses.add(className)) {
        return null;
    }
    //      System.out.println("getIsNonNull: " + requiredDesc);
    InputStream classStream = null;
    try {
        final int flags = ClassReader.SKIP_DEBUG | ClassReader.SKIP_FRAMES | ClassReader.SKIP_CODE;
        ClassLoader contextClassLoader = Thread.currentThread().getContextClassLoader();
        String classFileName = className.replace('.', '/') + ".class";
        classStream = contextClassLoader.getResourceAsStream(classFileName);
        final ClassReader cr = new ClassReader(classStream);
        ClassVisitor cv = new ClassVisitor() {
            @Override
            public MethodVisitor visitMethod(int access, String name, String desc, String signature,
                    String[] exceptions) {
                final String methodDesc = className + ";" + name + desc;
                //               System.out.println("  ClassVisitor.visitMethod: " + methodDesc);
                desc2state.put(methodDesc, null);
                return new MethodVisitor() {
                    @Override
                    public AnnotationVisitor visitAnnotation(String annotationDesc, boolean visible) {
                        //                     System.out.println("    MethodVisitor:" + annotationDesc + " " + true);
                        if (annotationDesc.equals(nonNullDesc)) {
                            desc2state.put(methodDesc, true);
                        } else if (annotationDesc.equals(nullableDesc)) {
                            desc2state.put(methodDesc, false);
                        }
                        return null;
                    }

                    @Override
                    public AnnotationVisitor visitAnnotationDefault() {
                        return null;
                    }

                    @Override
                    public AnnotationVisitor visitParameterAnnotation(int parameter, String desc,
                            boolean visible) {
                        return null;
                    }

                    @Override
                    public void visitAttribute(Attribute attr) {
                    }

                    @Override
                    public void visitCode() {
                    }

                    @Override
                    public void visitFrame(int type, int nLocal, Object[] local, int nStack, Object[] stack) {
                    }

                    @Override
                    public void visitInsn(int opcode) {
                    }

                    @Override
                    public void visitIntInsn(int opcode, int operand) {
                    }

                    @Override
                    public void visitVarInsn(int opcode, int var) {
                    }

                    @Override
                    public void visitTypeInsn(int opcode, String type) {
                    }

                    @Override
                    public void visitFieldInsn(int opcode, String owner, String name, String desc) {
                    }

                    @Override
                    public void visitMethodInsn(int opcode, String owner, String name, String desc) {
                    }

                    @Override
                    public void visitJumpInsn(int opcode, Label label) {
                    }

                    @Override
                    public void visitLabel(Label label) {
                    }

                    @Override
                    public void visitLdcInsn(Object cst) {
                    }

                    @Override
                    public void visitIincInsn(int var, int increment) {
                    }

                    @Override
                    public void visitTableSwitchInsn(int min, int max, Label dflt, Label[] labels) {
                    }

                    @Override
                    public void visitLookupSwitchInsn(Label dflt, int[] keys, Label[] labels) {
                    }

                    @Override
                    public void visitMultiANewArrayInsn(String desc, int dims) {
                    }

                    @Override
                    public void visitTryCatchBlock(Label start, Label end, Label handler, String type) {
                    }

                    @Override
                    public void visitLocalVariable(String name, String desc, String signature, Label start,
                            Label end, int index) {
                    }

                    @Override
                    public void visitLineNumber(int line, Label start) {
                    }

                    @Override
                    public void visitMaxs(int maxStack, int maxLocals) {
                    }

                    @Override
                    public void visitEnd() {
                    }
                };
            }

            @Override
            public void visit(int version, int access, String name, String signature, String superName,
                    String[] interfaces) {
            }

            @Override
            public void visitSource(String source, String debug) {
            }

            @Override
            public void visitOuterClass(String owner, String name, String desc) {
            }

            @Override
            public AnnotationVisitor visitAnnotation(String desc, boolean visible) {
                return null;
            }

            @Override
            public void visitAttribute(Attribute attr) {
            }

            @Override
            public void visitInnerClass(String name, String outerName, String innerName, int access) {
            }

            @Override
            public FieldVisitor visitField(int access, String name, String desc, String signature,
                    Object value) {
                return null;
            }

            @Override
            public void visitEnd() {
            }
        };
        cr.accept(cv, flags);
    } catch (IOException e) {
        logger.error("Failed to read '" + className + "'", e);
    } finally {
        if (classStream != null) {
            try {
                classStream.close();
            } catch (IOException e) {
            }
        }
    }
    return desc2state.get(requiredDesc);
}

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