Java AnnotationVisitor.visit方法代码示例

import org.objectweb.asm.AnnotationVisitor; //导入方法依赖的package包/类
private void visitAnnotationValue(AnnotationVisitor annotationVisitor, AnnotationValue<?> value) {
    String name = value.getName();
    if (value instanceof EnumAnnotationValue) {
        annotationVisitor.visitEnum(name, ((EnumAnnotationValue) value).getTypeDesc(), (String) value.getValue());
    } else if (value instanceof SimpleAnnotationValue) {
        annotationVisitor.visit(name, value.getValue());
    } else if (value instanceof ArrayAnnotationValue) {
        AnnotationVisitor arrayVisitor = annotationVisitor.visitArray(name);
        AnnotationValue<?>[] values = ((ArrayAnnotationValue) value).getValue();
        for (AnnotationValue<?> annotationValue : values) {
            visitAnnotationValue(arrayVisitor, annotationValue);
        }
        arrayVisitor.visitEnd();
    } else if (value instanceof AnnotationAnnotationValue) {
        AnnotationMember annotation = ((AnnotationAnnotationValue) value).getValue();
        AnnotationVisitor annVisitor = annotationVisitor.visitAnnotation(name, annotation.getName());
        visitAnnotationValues(annotation, annVisitor);
    }
}
 

import org.objectweb.asm.AnnotationVisitor; //导入方法依赖的package包/类
private void visitAnnotationValues(Annotation annotation, AnnotationVisitor annotationVisitor) {
    for (Method method : annotation.annotationType().getDeclaredMethods()) {
        String name = method.getName();
        Class<?> returnType = method.getReturnType();
        if (returnType.isEnum()) {
            annotationVisitor.visitEnum(name, Type.getType(returnType).getDescriptor(), getAnnotationParameterValue(annotation, method).toString());
        } else if (returnType.isArray() && !PRIMITIVE_TYPES.contains(returnType.getComponentType())) {
            AnnotationVisitor arrayVisitor = annotationVisitor.visitArray(name);
            Object[] elements = (Object[]) getAnnotationParameterValue(annotation, method);
            visitArrayElements(arrayVisitor, returnType.getComponentType(), elements);
            arrayVisitor.visitEnd();
        } else if (returnType.equals(Class.class)) {
            Class<?> clazz = (Class<?>) getAnnotationParameterValue(annotation, method);
            annotationVisitor.visit(name, Type.getType(clazz));
        } else if (returnType.isAnnotation()) {
            Annotation nestedAnnotation = (Annotation) getAnnotationParameterValue(annotation, method);
            AnnotationVisitor nestedAnnotationVisitor = annotationVisitor.visitAnnotation(name, Type.getType(returnType).getDescriptor());
            visitAnnotationValues(nestedAnnotation, nestedAnnotationVisitor);
            nestedAnnotationVisitor.visitEnd();
        } else {
            annotationVisitor.visit(name, getAnnotationParameterValue(annotation, method));
        }
    }
}
 

import org.objectweb.asm.AnnotationVisitor; //导入方法依赖的package包/类
/**
 * Makes the given visitor visit a given annotation value.
 * 
 * @param av
 *            an annotation visitor. Maybe <tt>null</tt>.
 * @param name
 *            the value name.
 * @param value
 *            the actual value.
 */
static void accept(final AnnotationVisitor av, final String name,
        final Object value) {
    if (av != null) {
        if (value instanceof String[]) {
            String[] typeconst = (String[]) value;
            av.visitEnum(name, typeconst[0], typeconst[1]);
        } else if (value instanceof AnnotationNode) {
            AnnotationNode an = (AnnotationNode) value;
            an.accept(av.visitAnnotation(name, an.desc));
        } else if (value instanceof List) {
            AnnotationVisitor v = av.visitArray(name);
            if (v != null) {
                List<?> array = (List<?>) value;
                for (int j = 0; j < array.size(); ++j) {
                    accept(v, null, array.get(j));
                }
                v.visitEnd();
            }
        } else {
            av.visit(name, value);
        }
    }
}
 

import org.objectweb.asm.AnnotationVisitor; //导入方法依赖的package包/类
@Override
public void begin(final String nm, final Attributes attrs)
        throws SAXException {
    AnnotationVisitor av = (AnnotationVisitor) peek();
    if (av != null) {
        av.visit(
                attrs.getValue("name"),
                getValue(attrs.getValue("desc"),
                        attrs.getValue("value")));
    }
}
 

import org.objectweb.asm.AnnotationVisitor; //导入方法依赖的package包/类
private static void addAnnotation(String name, Class<?> annotationMethodType, String typeDesc, AnnotationVisitor av,
        Object value)
        throws IllegalAccessException, InvocationTargetException {
    if (Enum.class.isAssignableFrom(annotationMethodType)) {
        av.visitEnum(name, typeDesc, value.toString());
    } else if (annotationMethodType.isAnnotation()) {
        @SuppressWarnings("unchecked")
        Class<? extends Annotation> annType = (Class<? extends Annotation>) annotationMethodType;
        AnnotationVisitor annotationVisitor = av.visitAnnotation(name, typeDesc);
        addAnnotationTree(annotationVisitor, (Annotation) value, annType);
        annotationVisitor.visitEnd();
    } else {
        av.visit(name, value);
    }
}