io.undertow.websockets.jsr.handshake.ExchangeHandshakeResponse Maven / Gradle / Ivy
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* Copyright 2014 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* 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
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*/
package io.undertow.websockets.jsr.handshake;
import java.util.List;
import java.util.Map;
import java.util.TreeMap;
import javax.websocket.HandshakeResponse;
import io.undertow.websockets.spi.WebSocketHttpExchange;
/**
* {@link HandshakeResponse} which wraps a {@link io.undertow.websockets.spi.WebSocketHttpExchange} to act on it.
* Once the processing of it is done {@link #update()} must be called to persist any changes
* made.
*
* @author Norman Maurer
*/
public final class ExchangeHandshakeResponse implements HandshakeResponse {
private final WebSocketHttpExchange exchange;
private Map> headers;
public ExchangeHandshakeResponse(final WebSocketHttpExchange exchange) {
this.exchange = exchange;
}
@Override
public Map> getHeaders() {
if (headers == null) {
headers = new TreeMap<>(String.CASE_INSENSITIVE_ORDER);
headers.putAll(exchange.getResponseHeaders());
}
return headers;
}
/**
* Persist all changes and update the wrapped {@link io.undertow.websockets.spi.WebSocketHttpExchange}.
*/
void update() {
if (headers != null) {
exchange.setResponseHeaders(headers);
}
}
}