Fields.java

/**
 *
 * Copyright 2010, Lawrence McAlpin.
 *
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 */
package play.modules.scaffold.utils;

import java.lang.annotation.Annotation;
import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

public class Fields {
    public static List<String> annotationNames(Field field) {
        List<String> output = new ArrayList<String>();
        Annotation[] annotations = field.getAnnotations();
        for (Annotation ann : annotations) {
            output.add(ann.annotationType().getName());
        }
        return output;
    }

    public static List<Class<? extends Annotation>> annotations(Field field) {
        List<Class<? extends Annotation>> output = new ArrayList<Class<? extends Annotation>>();
        Annotation[] annotations = field.getAnnotations();
        for (Annotation ann : annotations) {
            output.add(ann.annotationType());
        }
        return output;
    }

    public static List<Class<? extends Annotation>> annotations(Class<?> clazz, String fieldName) {
        List<Field> fields = Classes.publicFields(clazz);
        for (Field field : fields) {
            if (field.getName().equalsIgnoreCase(fieldName)) {
                return annotations(field);
            }
        }
        return null;
    }

    public static boolean isNumeric(Field field) {
        Class<?> type = field.getType();
        return Classes.isNumeric(type);
    }
}