74 lines
2.1 KiB
Java
74 lines
2.1 KiB
Java
/*
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* Copyright 2015 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package io.netty.resolver.dns;
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import java.net.InetSocketAddress;
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import java.util.Collection;
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import java.util.List;
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final class SequentialDnsServerAddressStream implements DnsServerAddressStream {
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private final List<? extends InetSocketAddress> addresses;
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private int i;
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SequentialDnsServerAddressStream(List<? extends InetSocketAddress> addresses, int startIdx) {
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this.addresses = addresses;
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i = startIdx;
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}
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@Override
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public InetSocketAddress next() {
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int i = this.i;
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InetSocketAddress next = addresses.get(i);
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if (++ i < addresses.size()) {
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this.i = i;
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} else {
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this.i = 0;
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}
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return next;
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}
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@Override
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public int size() {
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return addresses.size();
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}
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@Override
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public SequentialDnsServerAddressStream duplicate() {
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return new SequentialDnsServerAddressStream(addresses, i);
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}
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@Override
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public String toString() {
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return toString("sequential", i, addresses);
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}
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static String toString(String type, int index, Collection<? extends InetSocketAddress> addresses) {
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final StringBuilder buf = new StringBuilder(type.length() + 2 + addresses.size() * 16);
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buf.append(type).append("(index: ").append(index);
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buf.append(", addrs: (");
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for (InetSocketAddress a: addresses) {
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buf.append(a).append(", ");
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}
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buf.setLength(buf.length() - 2);
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buf.append("))");
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return buf.toString();
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}
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}
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