com.codename1.properties.NumericProperty Maven / Gradle / Ivy
/*
* Copyright (c) 2012, Codename One and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Codename One designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Codename One through http://www.codenameone.com/ if you
* need additional information or have any questions.
*/
package com.codename1.properties;
/**
* This is the base class to all number properties, it introduces nullability and the ability to convert to all
* number types.
*
*
* @author Shai Almog
*/
public abstract class NumericProperty extends Property {
private boolean nullable;
/**
* {@inheritDoc}
*/
public NumericProperty(String name) {
super(name);
nullable = true;
}
/**
* {@inheritDoc}
*/
public NumericProperty(String name, Class genericType) {
super(name, genericType);
nullable = true;
}
/**
* {@inheritDoc}
*/
public NumericProperty(String name, T value) {
super(name, value);
nullable = value == null;
}
/**
* {@inheritDoc}
*/
public NumericProperty(String name, Class genericType, T value) {
super(name, genericType, value);
nullable = value == null;
}
/**
* If the field is nullable {@code set(null)} will fail
* @return the nullable
*/
public boolean isNullable() {
return nullable;
}
/**
* If the field is nullable {@code set(null)} will fail
* @param nullable the nullable to set
*/
public void setNullable(boolean nullable) {
this.nullable = nullable;
}
@Override
public K set(T value) {
if(!nullable && value == null) {
throw new NullPointerException(getName() + " can't be null");
}
return super.set(value);
}
}