src/main/java/org/takes/facets/fork/FkChain.java
/*
* The MIT License (MIT)
*
* Copyright (c) 2014-2024 Yegor Bugayenko
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package org.takes.facets.fork;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import org.takes.Request;
import org.takes.Response;
import org.takes.misc.Opt;
/**
* A Fork chain. Routes to each given Fork in order, until one of them returns
* a response or until none are left.
* @since 0.33
*/
public final class FkChain implements Fork {
/**
* Forks.
*/
private final Collection<Fork> forks;
/**
* Ctor.
*/
public FkChain() {
this(Collections.emptyList());
}
/**
* Ctor.
* @param forks Forks
*/
public FkChain(final Fork... forks) {
this(Arrays.asList(forks));
}
/**
* Ctor.
* @param forks Forks
*/
public FkChain(final Collection<Fork> forks) {
this.forks = Collections.unmodifiableCollection(forks);
}
@Override
public Opt<Response> route(final Request request) throws Exception {
Opt<Response> response = new Opt.Empty<>();
for (final Fork fork : this.forks) {
final Opt<Response> current = fork.route(request);
if (current.has()) {
response = current;
break;
}
}
return response;
}
}