Java tutorial
/* * Copyright 2002-2017 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 * * https://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.ui; import java.util.Collection; import java.util.Map; import org.springframework.lang.Nullable; /** * Subclass of {@link ModelMap} that implements the {@link Model} interface. * Java 5 specific like the {@code Model} interface itself. * * <p>This is an implementation class exposed to handler methods by Spring MVC, typically via * a declaration of the {@link org.springframework.ui.Model} interface. There is no need to * build it within user code; a plain {@link org.springframework.ui.ModelMap} or even a just * a regular {@link Map} with String keys will be good enough to return a user model. * * @author Juergen Hoeller * @since 2.5.1 */ @SuppressWarnings("serial") public class ExtendedModelMap extends ModelMap implements Model { @Override public ExtendedModelMap addAttribute(String attributeName, @Nullable Object attributeValue) { super.addAttribute(attributeName, attributeValue); return this; } @Override public ExtendedModelMap addAttribute(Object attributeValue) { super.addAttribute(attributeValue); return this; } @Override public ExtendedModelMap addAllAttributes(@Nullable Collection<?> attributeValues) { super.addAllAttributes(attributeValues); return this; } @Override public ExtendedModelMap addAllAttributes(@Nullable Map<String, ?> attributes) { super.addAllAttributes(attributes); return this; } @Override public ExtendedModelMap mergeAttributes(@Nullable Map<String, ?> attributes) { super.mergeAttributes(attributes); return this; } @Override public Map<String, Object> asMap() { return this; } }