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TransportRegistry.js
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TransportRegistry.js
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/*
* Copyright (c) 2008 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.
*/
/**
* A registry for transports used by the CometD object.
*/
export class TransportRegistry {
#types = [];
#transports = {};
getTransportTypes() {
return this.#types.slice(0);
}
add(type, transport, index) {
let existing = false;
for (let i = 0; i < this.#types.length; ++i) {
if (this.#types[i] === type) {
existing = true;
break;
}
}
if (!existing) {
if (typeof index !== "number") {
this.#types.push(type);
} else {
this.#types.splice(index, 0, type);
}
this.#transports[type] = transport;
}
return !existing;
}
find(type) {
for (let i = 0; i < this.#types.length; ++i) {
if (this.#types[i] === type) {
return this.#transports[type];
}
}
return null;
}
negotiateTransport(types, version, crossDomain, url) {
for (let i = 0; i < this.#types.length; ++i) {
const type = this.#types[i];
for (let j = 0; j < types.length; ++j) {
if (type === types[j]) {
const transport = this.#transports[type];
if (transport.accept(version, crossDomain, url) === true) {
return transport;
}
}
}
}
return null;
}
clear() {
this.#types = [];
this.#transports = {};
}
reset(init) {
for (let i = 0; i < this.#types.length; ++i) {
this.#transports[this.#types[i]].reset(init);
}
}
findTransportTypes(version, crossDomain, url) {
const result = [];
for (let i = 0; i < this.#types.length; ++i) {
const type = this.#types[i];
if (this.#transports[type].accept(version, crossDomain, url) === true) {
result.push(type);
}
}
return result;
}
remove(type) {
for (let i = 0; i < this.#types.length; ++i) {
if (this.#types[i] === type) {
this.#types.splice(i, 1);
const transport = this.#transports[type];
delete this.#transports[type];
return transport;
}
}
return null;
}
}