/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.sshd.common.util.closeable;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Objects;
import org.apache.sshd.common.Closeable;
import org.apache.sshd.common.future.SshFuture;
import org.apache.sshd.common.util.ObjectBuilder;
/**
* @author <a href="mailto:dev@mina.apache.org">Apache MINA SSHD Project</a>
*/
public final class Builder implements ObjectBuilder<Closeable> {
private final Object lock;
private final List<Closeable> closeables = new ArrayList<>();
public Builder(Object lock) {
this.lock = Objects.requireNonNull(lock, "No lock");
}
public Builder run(Runnable r) {
return close(new SimpleCloseable(lock) {
@Override
protected void doClose(boolean immediately) {
try {
r.run();
} finally {
super.doClose(immediately);
}
}
});
}
@SuppressWarnings("rawtypes")
public <T extends SshFuture> Builder when(SshFuture<T> future) {
if (future != null) {
when(Collections.singleton(future));
}
return this;
}
@SuppressWarnings("rawtypes")
@SafeVarargs
public final <T extends SshFuture> Builder when(SshFuture<T>... futures) {
return when(Arrays.asList(futures));
}
@SuppressWarnings("rawtypes")
public <T extends SshFuture> Builder when(Iterable<? extends SshFuture<T>> futures) {
return close(new FuturesCloseable<>(lock, futures));
}
public Builder sequential(Closeable... closeables) {
for (Closeable closeable : closeables) {
close(closeable);
}
return this;
}
public Builder sequential(Iterable<Closeable> closeables) {
return close(new SequentialCloseable(lock, closeables));
}
public Builder parallel(Closeable... closeables) {
if (closeables.length == 1) {
close(closeables[0]);
} else if (closeables.length > 0) {
parallel(Arrays.asList(closeables));
}
return this;
}
public Builder parallel(Iterable<? extends Closeable> closeables) {
return close(new ParallelCloseable(lock, closeables));
}
public Builder close(Closeable c) {
if (c != null) {
closeables.add(c);
}
return this;
}
@Override
public Closeable build() {
if (closeables.isEmpty()) {
return new SimpleCloseable(lock);
} else if (closeables.size() == 1) {
return closeables.get(0);
} else {
return new SequentialCloseable(lock, closeables);
}
}
}