org.springframework.web.reactive.result.condition.AbstractMediaTypeExpression 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.reactive.result.condition;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.http.MediaType;
import org.springframework.lang.Nullable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.server.NotAcceptableStatusException;
import org.springframework.web.server.ServerWebExchange;
import org.springframework.web.server.UnsupportedMediaTypeStatusException;
/**
* Supports media type expressions as described in:
* {@link RequestMapping#consumes()} and {@link RequestMapping#produces()}.
*
* @author Rossen Stoyanchev
* @since 5.0
*/
abstract class AbstractMediaTypeExpression implements Comparable, MediaTypeExpression {
protected final Log logger = LogFactory.getLog(getClass());
private final MediaType mediaType;
private final boolean isNegated;
AbstractMediaTypeExpression(String expression) {
if (expression.startsWith("!")) {
this.isNegated = true;
expression = expression.substring(1);
}
else {
this.isNegated = false;
}
this.mediaType = MediaType.parseMediaType(expression);
}
AbstractMediaTypeExpression(MediaType mediaType, boolean negated) {
this.mediaType = mediaType;
this.isNegated = negated;
}
@Override
public MediaType getMediaType() {
return this.mediaType;
}
@Override
public boolean isNegated() {
return this.isNegated;
}
public final boolean match(ServerWebExchange exchange) {
try {
boolean match = matchMediaType(exchange);
return (!this.isNegated == match);
}
catch (NotAcceptableStatusException | UnsupportedMediaTypeStatusException ex) {
return false;
}
}
protected abstract boolean matchMediaType(ServerWebExchange exchange)
throws NotAcceptableStatusException, UnsupportedMediaTypeStatusException;
@Override
public int compareTo(AbstractMediaTypeExpression other) {
return MediaType.SPECIFICITY_COMPARATOR.compare(this.getMediaType(), other.getMediaType());
}
@Override
public boolean equals(@Nullable Object other) {
if (this == other) {
return true;
}
if (other == null || getClass() != other.getClass()) {
return false;
}
AbstractMediaTypeExpression otherExpr = (AbstractMediaTypeExpression) other;
return (this.mediaType.equals(otherExpr.mediaType) && this.isNegated == otherExpr.isNegated);
}
@Override
public int hashCode() {
return this.mediaType.hashCode();
}
@Override
public String toString() {
StringBuilder builder = new StringBuilder();
if (this.isNegated) {
builder.append('!');
}
builder.append(this.mediaType.toString());
return builder.toString();
}
}