springobjectmapper.ReflectionHelper.java Source code

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Here is the source code for springobjectmapper.ReflectionHelper.java

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/*
 * Copyright 2010 Janne Hietamaki
 *
 * 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 springobjectmapper;

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

import org.springframework.util.ReflectionUtils;

public class ReflectionHelper {
    public static Object[] getValues(List<Field> fields, Object o) {
        List<Object> results = new ArrayList<Object>();
        for (Field field : fields) {
            try {
                results.add(field.get(o));
            } catch (Exception e) {
                ReflectionUtils.handleReflectionException(e);
            }
        }
        return results.toArray();
    }

    public static Field getAnnotatedField(Class<?> c, Class<? extends Annotation> annotationType) {
        for (Field field : getFields(c)) {
            Annotation annotation = field.getAnnotation(annotationType);
            if (annotation != null) {
                return field;
            }
        }
        throw new RuntimeException("Field with annotation " + annotationType.getCanonicalName()
                + " was not found on type " + c.getName() + "!");
    }

    public static Field getField(Class<?> c, String name) {
        do {
            try {
                Field field = c.getDeclaredField(name);
                field.setAccessible(true);
                return field;
            } catch (NoSuchFieldException ex) {
            } catch (Exception e) {
                ReflectionUtils.handleReflectionException(e);
            }
            c = c.getSuperclass();
        } while (c != null);
        throw new RuntimeException("Field " + name + " was not found!");
    }

    public static Object getFieldValue(Field field, Object o) {
        try {
            return field.get(o);
        } catch (Exception e) {
            ReflectionUtils.handleReflectionException(e);
            return null;
        }
    }

    public static List<Field> getFields(Class<?> c) {
        List<Field> results = new ArrayList<Field>();
        do {
            Field[] fields = c.getDeclaredFields();
            for (Field field : fields) {
                if (isEntityField(field)) {
                    results.add(field);
                }
                field.setAccessible(true);
            }
            c = c.getSuperclass();
        } while (c != null);
        return results;
    }

    private static boolean isEntityField(Field field) {
        return !field.isSynthetic() && !Modifier.isStatic(field.getModifiers())
                && !Modifier.isTransient(field.getModifiers());
    }

}