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Java example source code file (AuthScope.java)

This example source code file (AuthScope.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java tags/keywords

any_host, any_port, any_realm, any_scheme, authscope, illegalargumentexception, immutable, override, string, stringbuffer, util

The AuthScope.java example source code

/*
 * ====================================================================
 *
 *  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.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 *
 */

package org.apache.http.auth;

import java.util.Locale;

import org.apache.http.annotation.Immutable;

import org.apache.http.util.LangUtils;

/** 
 * The class represents an authentication scope consisting of a host name,
 * a port number, a realm name and an authentication scheme name which 
 * {@link Credentials Credentials} apply to.
 * 
 * 
 * @since 4.0
 */
@Immutable
public class AuthScope {
    
    /** 
     * The <tt>null value represents any host. In the future versions of 
     * HttpClient the use of this parameter will be discontinued.  
     */
    public static final String ANY_HOST = null;

    /** 
     * The <tt>-1 value represents any port.  
     */
    public static final int ANY_PORT = -1;

    /** 
     * The <tt>null value represents any realm.  
     */
    public static final String ANY_REALM = null;

    /** 
     * The <tt>null value represents any authentication scheme.  
     */
    public static final String ANY_SCHEME = null;
    
    /** 
     * Default scope matching any host, port, realm and authentication scheme. 
     * In the future versions of HttpClient the use of this parameter will be 
     * discontinued.  
     */
    public static final AuthScope ANY = new AuthScope(ANY_HOST, ANY_PORT, ANY_REALM, ANY_SCHEME);

    /** The authentication scheme the credentials apply to. */
    private final String scheme;
    
    /** The realm the credentials apply to. */
    private final String realm;
    
    /** The host the credentials apply to. */
    private final String host;
        
    /** The port the credentials apply to. */
    private final int port;
        
    /** Creates a new credentials scope for the given 
     * <tt>host, port, realm, and 
     * <tt>authentication scheme.
     * 
     * @param host the host the credentials apply to. May be set
     *   to <tt>null if credenticals are applicable to
     *   any host. 
     * @param port the port the credentials apply to. May be set
     *   to negative value if credenticals are applicable to
     *   any port. 
     * @param realm the realm the credentials apply to. May be set 
     *   to <tt>null if credenticals are applicable to
     *   any realm. 
     * @param scheme the authentication scheme the credentials apply to. 
     *   May be set to <tt>null if credenticals are applicable to
     *   any authentication scheme. 
     */
    public AuthScope(final String host, int port, 
        final String realm, final String scheme)
    {
        this.host =   (host == null)   ? ANY_HOST: host.toLowerCase(Locale.ENGLISH);
        this.port =   (port < 0)       ? ANY_PORT: port;
        this.realm =  (realm == null)  ? ANY_REALM: realm;
        this.scheme = (scheme == null) ? ANY_SCHEME: scheme.toUpperCase(Locale.ENGLISH);
    }
    
    /** Creates a new credentials scope for the given 
     * <tt>host, port, realm, and any
     * authentication scheme.
     * 
     * @param host the host the credentials apply to. May be set
     *   to <tt>null if credenticals are applicable to
     *   any host. 
     * @param port the port the credentials apply to. May be set
     *   to negative value if credenticals are applicable to
     *   any port. 
     * @param realm the realm the credentials apply to. May be set 
     *   to <tt>null if credenticals are applicable to
     *   any realm. 
     */
    public AuthScope(final String host, int port, final String realm) {
        this(host, port, realm, ANY_SCHEME);
    }
    
    /** Creates a new credentials scope for the given 
     * <tt>host, port, any realm name, and any
     * authentication scheme.
     * 
     * @param host the host the credentials apply to. May be set
     *   to <tt>null if credenticals are applicable to
     *   any host. 
     * @param port the port the credentials apply to. May be set
     *   to negative value if credenticals are applicable to
     *   any port. 
     */
    public AuthScope(final String host, int port) {
        this(host, port, ANY_REALM, ANY_SCHEME);
    }
    
    /** 
     * Creates a copy of the given credentials scope.
     */
    public AuthScope(final AuthScope authscope) {
        super();
        if (authscope == null) {
            throw new IllegalArgumentException("Scope may not be null");
        }
        this.host = authscope.getHost();
        this.port = authscope.getPort();
        this.realm = authscope.getRealm();
        this.scheme = authscope.getScheme();
    }
    
    /**
     * @return the host
     */
    public String getHost() {
        return this.host;
    }

    /**
     * @return the port
     */
    public int getPort() {
        return this.port;
    }

    /**
     * @return the realm name
     */
    public String getRealm() {
        return this.realm;
    }

    /**
     * @return the scheme type
     */
    public String getScheme() {
        return this.scheme;
    }

    /**
     * Tests if the authentication scopes match. 
     * 
     * @return the match factor. Negative value signifies no match. 
     *    Non-negative signifies a match. The greater the returned value 
     *    the closer the match.
     */
    public int match(final AuthScope that) {
        int factor = 0;
        if (LangUtils.equals(this.scheme, that.scheme)) {
            factor += 1;
        } else {
            if (this.scheme != ANY_SCHEME && that.scheme != ANY_SCHEME) {
                return -1;
            }
        }
        if (LangUtils.equals(this.realm, that.realm)) {
            factor += 2;
        } else {
            if (this.realm != ANY_REALM && that.realm != ANY_REALM) {
                return -1;
            }
        }
        if (this.port == that.port) {
            factor += 4;
        } else {
            if (this.port != ANY_PORT && that.port != ANY_PORT) {
                return -1;
            }
        }
        if (LangUtils.equals(this.host, that.host)) {
            factor += 8;
        } else {
            if (this.host != ANY_HOST && that.host != ANY_HOST) {
                return -1;
            }
        }
        return factor;
    }

    /**
     * @see java.lang.Object#equals(Object)
     */
    @Override
    public boolean equals(Object o) {
        if (o == null) {
            return false;
        }
        if (o == this) {
            return true;
        }
        if (!(o instanceof AuthScope)) {
            return super.equals(o);
        }
        AuthScope that = (AuthScope) o;
        return 
        LangUtils.equals(this.host, that.host) 
          && this.port == that.port
          && LangUtils.equals(this.realm, that.realm)
          && LangUtils.equals(this.scheme, that.scheme);
    }

    /**
     * @see java.lang.Object#toString()
     */
    @Override
    public String toString() {
        StringBuffer buffer = new StringBuffer();
        if (this.scheme != null) {
            buffer.append(this.scheme.toUpperCase(Locale.ENGLISH));
            buffer.append(' ');
        }
        if (this.realm != null) {
            buffer.append('\'');
            buffer.append(this.realm);
            buffer.append('\'');
        } else {
            buffer.append("<any realm>");
        }
        if (this.host != null) {
            buffer.append('@');
            buffer.append(this.host);
            if (this.port >= 0) {
                buffer.append(':');
                buffer.append(this.port);
            }
        }
        return buffer.toString();
    }
    
    /**
     * @see java.lang.Object#hashCode()
     */
    @Override
    public int hashCode() {
        int hash = LangUtils.HASH_SEED;
        hash = LangUtils.hashCode(hash, this.host);
        hash = LangUtils.hashCode(hash, this.port);
        hash = LangUtils.hashCode(hash, this.realm);
        hash = LangUtils.hashCode(hash, this.scheme);
        return hash;
    }
}

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