Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
import java.lang.annotation.Annotation;

import java.lang.reflect.Field;

import java.util.ArrayList;
import java.util.List;

public class Main {
    /**
     * Gets the given class's {@link Field}s marked with the annotation of the
     * specified class.
     * <p>
     * Unlike {@link Class#getFields()}, the result will include any non-public
     * fields, including fields defined in supertypes of the given class.
     * </p>
     * 
     * @param c The class to scan for annotated fields.
     * @param annotationClass The type of annotation for which to scan.
     * @return A new list containing all fields with the requested annotation.
     */
    public static <A extends Annotation> List<Field> getAnnotatedFields(final Class<?> c,
            final Class<A> annotationClass) {
        final ArrayList<Field> fields = new ArrayList<Field>();
        getAnnotatedFields(c, annotationClass, fields);
        return fields;
    }

    /**
     * Gets the given class's {@link Field}s marked with the annotation of the
     * specified class.
     * <p>
     * Unlike {@link Class#getFields()}, the result will include any non-public
     * fields, including fields defined in supertypes of the given class.
     * </p>
     * 
     * @param c The class to scan for annotated fields.
     * @param annotationClass The type of annotation for which to scan.
     * @param fields The list to which matching fields will be added.
     */
    public static <A extends Annotation> void getAnnotatedFields(final Class<?> c, final Class<A> annotationClass,
            final List<Field> fields) {
        if (c == null)
            return;

        // check supertypes for annotated fields first
        getAnnotatedFields(c.getSuperclass(), annotationClass, fields);
        for (final Class<?> iface : c.getInterfaces()) {
            getAnnotatedFields(iface, annotationClass, fields);
        }

        for (final Field f : c.getDeclaredFields()) {
            final A ann = f.getAnnotation(annotationClass);
            if (ann != null)
                fields.add(f);
        }
    }
}