Spring Framework example source code file (DirectFieldBindingResult.java)

This example Spring Framework source code file (DirectFieldBindingResult.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Spring Framework tags/keywords

abstractpropertybindingresult, configurablepropertyaccessor, configurablepropertyaccessor, directfieldbindingresult, directfieldbindingresult, object, object, string, target, target

The Spring Framework DirectFieldBindingResult.java source code

/*
 * Copyright 2002-2008 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 org.springframework.beans.ConfigurablePropertyAccessor;
import org.springframework.beans.PropertyAccessorFactory;
import org.springframework.util.Assert;

/**
 * Special implementation of the Errors and BindingResult interfaces,
 * supporting registration and evaluation of binding errors on value objects.
 * Performs direct field access instead of going through JavaBean getters.
 *
 * <p>This implementation just supports fields in the actual target object.
 * It is not able to traverse nested fields.
 *
 * @author Juergen Hoeller
 * @since 2.0
 * @see DataBinder#getBindingResult()
 * @see DataBinder#initDirectFieldAccess()
 * @see BeanPropertyBindingResult
 */
public class DirectFieldBindingResult extends AbstractPropertyBindingResult {

	private final Object target;

	private transient ConfigurablePropertyAccessor directFieldAccessor;


	/**
	 * Create a new DirectFieldBindingResult instance.
	 * @param target the target object to bind onto
	 * @param objectName the name of the target object
	 */
	public DirectFieldBindingResult(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 DirectFieldAccessor that this instance uses.
	 * Creates a new one if none existed before.
	 * @see #createDirectFieldAccessor()
	 */
	public final ConfigurablePropertyAccessor getPropertyAccessor() {
		if (this.directFieldAccessor == null) {
			this.directFieldAccessor = createDirectFieldAccessor();
			this.directFieldAccessor.setExtractOldValueForEditor(true);
		}
		return this.directFieldAccessor;
	}

	/**
	 * Create a new DirectFieldAccessor for the underlying target object.
	 * @see #getTarget()
	 */
	protected ConfigurablePropertyAccessor createDirectFieldAccessor() {
		return PropertyAccessorFactory.forDirectFieldAccess(getTarget());
	}

}