org.springframework.validation.BeanPropertyBindingResult Maven / Gradle / Ivy
/*
* Copyright 2002-2006 the original author or authors.
*
* 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.springframework.validation;
import java.io.Serializable;
import org.springframework.beans.BeanWrapper;
import org.springframework.beans.BeanWrapperImpl;
import org.springframework.beans.ConfigurablePropertyAccessor;
import org.springframework.util.Assert;
/**
* Default implementation of the {@link Errors} and {@link BindingResult}
* interfaces, for the registration and evaluation of binding errors on
* JavaBean objects.
*
* Performs standard JavaBean property access, also supporting nested
* properties. Normally, application code will work with the
* Errors interface or the BindingResult interface.
* A {@link DataBinder} returns its BindingResult via
* {@link org.springframework.validation.DataBinder#getBindingResult()}.
*
* @author Juergen Hoeller
* @since 2.0
* @see DataBinder#getBindingResult()
* @see DataBinder#initBeanPropertyAccess()
* @see DirectFieldBindingResult
*/
public class BeanPropertyBindingResult extends AbstractPropertyBindingResult implements Serializable {
private final Object target;
private transient BeanWrapper beanWrapper;
/**
* Creates a new instance of the {@link BeanPropertyBindingResult} class.
* @param target the target bean to bind onto
* @param objectName the name of the target object
* @throws IllegalArgumentException if the supplied target is null
*/
public BeanPropertyBindingResult(Object target, String objectName) {
super(objectName);
Assert.notNull(target, "Target bean must not be null");
this.target = target;
}
public final Object getTarget() {
return this.target;
}
/**
* Returns the {@link BeanWrapper} that this instance uses.
* Creates a new one if none existed before.
* @see #createBeanWrapper()
*/
public final ConfigurablePropertyAccessor getPropertyAccessor() {
if (this.beanWrapper == null) {
this.beanWrapper = createBeanWrapper();
this.beanWrapper.setExtractOldValueForEditor(true);
}
return this.beanWrapper;
}
/**
* Create a new {@link BeanWrapper} for the underlying target object.
* @see #getTarget()
*/
protected BeanWrapper createBeanWrapper() {
return new BeanWrapperImpl(getTarget());
}
}