io.netty.channel.local.LocalAddress Maven / Gradle / Ivy

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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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/*
 * Copyright 2012 The Netty Project
 *
 * The Netty Project 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 io.netty.channel.local;

import io.netty.channel.Channel;

import java.net.SocketAddress;

/**
 * An endpoint in the local transport.  Each endpoint is identified by a unique
 * case-insensitive string.
 */
public final class LocalAddress extends SocketAddress implements Comparable {

    private static final long serialVersionUID = 4644331421130916435L;

    public static final LocalAddress ANY = new LocalAddress("ANY");

    private final String id;
    private final String strVal;

    /**
     * Creates a new ephemeral port based on the ID of the specified channel.
     * Note that we prepend an upper-case character so that it never conflicts with
     * the addresses created by a user, which are always lower-cased on construction time.
     */
    LocalAddress(Channel channel) {
        StringBuilder buf = new StringBuilder(16);
        buf.append("local:E");
        buf.append(Long.toHexString(channel.hashCode() & 0xFFFFFFFFL | 0x100000000L));
        buf.setCharAt(7, ':');
        id = buf.substring(6);
        strVal = buf.toString();
    }

    /**
     * Creates a new instance with the specified ID.
     */
    public LocalAddress(String id) {
        if (id == null) {
            throw new NullPointerException("id");
        }
        id = id.trim().toLowerCase();
        if (id.isEmpty()) {
            throw new IllegalArgumentException("empty id");
        }
        this.id = id;
        strVal = "local:" + id;
    }

    /**
     * Returns the ID of this address.
     */
    public String id() {
        return id;
    }

    @Override
    public int hashCode() {
        return id.hashCode();
    }

    @Override
    public boolean equals(Object o) {
        if (!(o instanceof LocalAddress)) {
            return false;
        }

        return id.equals(((LocalAddress) o).id);
    }

    @Override
    public int compareTo(LocalAddress o) {
        return id.compareTo(o.id);
    }

    @Override
    public String toString() {
        return strVal;
    }
}