org.joda.beans.impl.BasicBeanBuilder Maven / Gradle / Ivy
/*
* Copyright 2001-present Stephen Colebourne
*
* 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 org.joda.beans.impl;
import org.joda.beans.Bean;
import org.joda.beans.BeanBuilder;
import org.joda.beans.MetaProperty;
/**
* Basic implementation of {@code BeanBuilder} that wraps a real bean.
*
* This approach saves creating a temporary map, but is only suitable if the
* bean has a no-arg constructor and allows properties to be set.
*
* @param the bean type
*/
public class BasicBeanBuilder
implements BeanBuilder {
/**
* The actual target bean.
*/
private final T bean;
/**
* Constructs the builder wrapping the target bean.
*
* @param bean the target bean, not null
*/
public BasicBeanBuilder(T bean) {
if (bean == null) {
throw new NullPointerException("Bean must not be null");
}
this.bean = bean;
}
//-----------------------------------------------------------------------
/**
* Gets the target bean.
*
* @return the target bean, not null
*/
protected T getTargetBean() {
return bean;
}
//-----------------------------------------------------------------------
@Override
public Object get(String propertyName) {
return bean.property(propertyName).get();
}
@Override
public P get(MetaProperty
metaProperty) {
return metaProperty.get(bean);
}
//-----------------------------------------------------------------------
@Override
public BeanBuilder set(String propertyName, Object value) {
return set(bean.metaBean().metaProperty(propertyName), value);
}
@Override
public BeanBuilder set(MetaProperty metaProperty, Object value) {
metaProperty.set(bean, value);
return this;
}
@Override
public T build() {
validate(bean);
return bean;
}
/**
* Hook to allow a subclass to validate the bean.
*
* @param bean the bean to validate, not null
*/
protected void validate(T bean) {
// override to validate the bean
}
//-----------------------------------------------------------------------
/**
* Returns a string that summarises the builder.
*
* @return a summary string, not null
*/
@Override
public String toString() {
return "BeanBuilder for " + bean.metaBean().beanName();
}
}