Get the value of the field in the given object. - Java Reflection

Java examples for Reflection:Field Value

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Description

Get the value of the field in the given object.

Demo Code

/*/*w w w.  j a  v  a 2 s . co m*/
 * Copyright 2013 Balazs Berkes.
 *
 * 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.
 */
import static java.lang.reflect.Modifier.isFinal;
import static java.lang.reflect.Modifier.isPublic;
import static java.lang.reflect.Modifier.isStatic;
import static org.mockannotations.utils.MockAnnotationValidationUtils.notNull;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;

public class Main{
    /**
     * Get the value of the field in the given object.
     * <p>
     * @param field which value will be returned
     * @param target the target object which contains the field
     * @return the value of the field
     * <p>
     * @throws UnableToReadFieldException when setting the field failed
     */
    public static Object getField(Field field, Object target)
            throws UnableToReadFieldException {
        Object fieldValue = null;
        if (notNull(target)) {
            fieldValue = getFieldWithRuntimeException(field, target);
        }
        return fieldValue;
    }
    private static Object getFieldWithRuntimeException(Field field,
            Object target) throws UnableToReadFieldException,
            SecurityException {
        field.setAccessible(true);
        try {
            return field.get(target);
        } catch (Exception ex) {
            throw new UnableToReadFieldException(field, ex);
        }
    }
}

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