sockslib.common.Socks5UserPrincipal.java Source code

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Here is the source code for sockslib.common.Socks5UserPrincipal.java

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/*
 * Copyright 2015-2025 the original author or authors.
 * 
 * Licensed 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 sockslib.common;

import com.google.common.base.Charsets;
import com.google.common.hash.Hashing;

import java.io.Serializable;
import java.security.Principal;

import static com.google.common.base.Preconditions.checkNotNull;

/**
 * The class <code>Socks5UserPrincipal</code> represents a SOKCS5 user principal.
 *
 * @author Youchao Feng
 * @version 1.0
 * @date May 14, 2015 2:35:53 PM
 */
public class Socks5UserPrincipal implements Principal, Serializable {

    /**
     * Serial version UID
     */
    private static final long serialVersionUID = 1L;
    private String username;

    public Socks5UserPrincipal(String username) {
        this.username = checkNotNull(username, "Argument [username] may not be null");
    }

    @Override
    public String getName() {
        return this.username;
    }

    @Override
    public int hashCode() {
        return Hashing.md5().newHasher().putString(username, Charsets.UTF_8).hashCode();
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj instanceof Socks5UserPrincipal) {
            final Socks5UserPrincipal that = (Socks5UserPrincipal) obj;
            if (this.username.equals(that.username)) {
                return true;
            }
        }
        return false;
    }

    @Override
    public String toString() {
        return String.format("Principal[%s]", this.username);
    }

}