org.springframework.web.accept.ParameterContentNegotiationStrategy Maven / Gradle / Ivy
/*
* Copyright 2002-2018 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.web.accept;
import java.util.Map;
import org.springframework.http.MediaType;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;
import org.springframework.web.context.request.NativeWebRequest;
/**
* Strategy that resolves the requested content type from a query parameter.
* The default query parameter name is {@literal "format"}.
*
* You can register static mappings between keys (i.e. the expected value of
* the query parameter) and MediaType's via {@link #addMapping(String, MediaType)}.
* As of 5.0 this strategy also supports dynamic lookups of keys via
* {@link org.springframework.http.MediaTypeFactory#getMediaType}.
*
* @author Rossen Stoyanchev
* @since 3.2
*/
public class ParameterContentNegotiationStrategy extends AbstractMappingContentNegotiationStrategy {
private String parameterName = "format";
/**
* Create an instance with the given map of file extensions and media types.
*/
public ParameterContentNegotiationStrategy(Map mediaTypes) {
super(mediaTypes);
}
/**
* Set the name of the parameter to use to determine requested media types.
* By default this is set to {@code "format"}.
*/
public void setParameterName(String parameterName) {
Assert.notNull(parameterName, "'parameterName' is required");
this.parameterName = parameterName;
}
public String getParameterName() {
return this.parameterName;
}
@Override
@Nullable
protected String getMediaTypeKey(NativeWebRequest request) {
return request.getParameter(getParameterName());
}
}