org.unitils.objectvalidation.rules.ClassMustBeSerializableRule Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of unitils-objectvalidation Show documentation

Unitils module to validate objects.

There is a newer version: 1.1.9

Show newest version

package org.unitils.objectvalidation.rules;

import static java.lang.reflect.Modifier.isFinal;
import static java.lang.reflect.Modifier.isPrivate;
import static java.lang.reflect.Modifier.isStatic;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;
import static org.unitils.util.ReflectionUtils.getFieldWithName;

import java.io.Serializable;
import java.lang.reflect.Field;

import org.unitils.objectvalidation.Rule;


/**
 * Rule to check that the class passed in parameter must implement {@link java.io.Serializable}.
 * 
 * @author Matthieu Mestrez
 * @since Oct 23, 2013
 */
public class ClassMustBeSerializableRule implements Rule {
    
    @Override
    public void validate(Class classToValidate) {
        assertTrue("Class is not Serializable.", classToValidate instanceof Serializable);
        assertSerialsVersionUIDExists(classToValidate);
    }

    private void assertSerialsVersionUIDExists(Class classToValidate) {
        Field field = getFieldWithName(classToValidate, "serialVersionUID", true);
        assertNotNull("Class does not contains serialVersionUID field.", field);
        assertTrue("serialVersionUID is not final.", isFinal(field.getModifiers()));
        assertTrue("serialVersionUID is not private", isPrivate(field.getModifiers()));
        assertTrue("serialVersionUID is not static", isStatic(field.getModifiers()));
    }
}