001/* 002 * Copyright 2002-2020 the original author or authors. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * https://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017package org.springframework.validation; 018 019import java.io.Serializable; 020import java.util.Map; 021 022import org.springframework.lang.NonNull; 023import org.springframework.lang.Nullable; 024import org.springframework.util.Assert; 025 026/** 027 * Map-based implementation of the BindingResult interface, 028 * supporting registration and evaluation of binding errors on 029 * Map attributes. 030 * 031 * <p>Can be used as errors holder for custom binding onto a 032 * Map, for example when invoking a Validator for a Map object. 033 * 034 * @author Juergen Hoeller 035 * @since 2.0 036 * @see java.util.Map 037 */ 038@SuppressWarnings("serial") 039public class MapBindingResult extends AbstractBindingResult implements Serializable { 040 041 private final Map<?, ?> target; 042 043 044 /** 045 * Create a new MapBindingResult instance. 046 * @param target the target Map to bind onto 047 * @param objectName the name of the target object 048 */ 049 public MapBindingResult(Map<?, ?> target, String objectName) { 050 super(objectName); 051 Assert.notNull(target, "Target Map must not be null"); 052 this.target = target; 053 } 054 055 056 /** 057 * Return the target Map to bind onto. 058 */ 059 public final Map<?, ?> getTargetMap() { 060 return this.target; 061 } 062 063 @Override 064 @NonNull 065 public final Object getTarget() { 066 return this.target; 067 } 068 069 @Override 070 @Nullable 071 protected Object getActualFieldValue(String field) { 072 return this.target.get(field); 073 } 074 075}