io.vertx.core.dns.impl.netty.DnsResource Maven / Gradle / Ivy
/*
* Copyright (c) 2013 The Netty Project
* ------------------------------------
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* and Apache License v2.0 which accompanies this distribution.
*
* The Eclipse Public License is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* The Apache License v2.0 is available at
* http://www.opensource.org/licenses/apache2.0.php
*
* You may elect to redistribute this code under either of these licenses.
*/
package io.vertx.core.dns.impl.netty;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufHolder;
/**
* Represents any resource record (answer, authority, or additional resource
* records).
*/
public class DnsResource extends DnsEntry implements ByteBufHolder {
private final int contentIndex;
private final long ttl;
private final ByteBuf content;
/**
* Constructs a resource record.
*
* @param name the domain name
* @param type the type of record being returned
* @param aClass the class for this resource record
* @param ttl the time to live after reading
* @param contentIndex the {@code writerIndex} at which the content appears in the
* original packet
* @param content the data contained in this record
*/
public DnsResource(String name, int type, int aClass, long ttl, int contentIndex, ByteBuf content) {
super(name, type, aClass);
this.ttl = ttl;
this.contentIndex = contentIndex;
this.content = content;
}
/**
* Returns the time to live after reading for this resource record.
*/
public long timeToLive() {
return ttl;
}
/**
* Returns the index at which the content of this resource record
* appears in the original packet.
*/
public int contentIndex() {
return contentIndex;
}
/**
* Returns the length of the content in this resource record.
*/
public int contentLength() {
return content.writerIndex() - content.readerIndex();
}
/**
* Returns the data contained in this resource record.
*/
@Override
public ByteBuf content() {
return content;
}
/**
* Returns a deep copy of this resource record.
*/
@Override
public DnsResource copy() {
return new DnsResource(name(), type(), dnsClass(), ttl, contentIndex, content.copy());
}
/**
* Returns a duplicate of this resource record.
*/
@Override
public ByteBufHolder duplicate() {
return new DnsResource(name(), type(), dnsClass(), ttl, contentIndex, content.duplicate());
}
@Override
public int refCnt() {
return content.refCnt();
}
@Override
public DnsResource retain() {
content.retain();
return this;
}
@Override
public DnsResource retain(int increment) {
content.retain(increment);
return this;
}
@Override
public boolean release() {
return content.release();
}
@Override
public boolean release(int decrement) {
return content.release(decrement);
}
}