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Java example source code file (CookieSpecRegistry.java)

This example source code file (CookieSpecRegistry.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

cookiespecfactory, cookiespecregistry, guardedby, httpparams, id, illegalargumentexception, illegalstateexception, linkedhashmap, list, map, name, string, threadsafe, unsupported, util

The CookieSpecRegistry.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.cookie;

import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Locale;
import java.util.Map;

import org.apache.http.annotation.GuardedBy;
import org.apache.http.annotation.ThreadSafe;

import org.apache.http.params.HttpParams;

/**
 * Cookie specification registry that can be used to obtain the corresponding
 * cookie specification implementation for a given type of type or version of 
 * cookie. 
 * 
 *
 * @since 4.0
 */
@ThreadSafe
public final class CookieSpecRegistry {

    @GuardedBy("this")
    private final Map<String,CookieSpecFactory> registeredSpecs;
    
    public CookieSpecRegistry() {
        super();
        this.registeredSpecs = new LinkedHashMap<String,CookieSpecFactory>();
    }
    
    /**
     * Registers a {@link CookieSpecFactory} with the given identifier. 
     * If a specification with the given name already exists it will be overridden.  
     * This nameis the same one used to retrieve the {@link CookieSpecFactory} 
     * from {@link #getCookieSpec(String)}.
     * 
     * @param name the identifier for this specification
     * @param factory the {@link CookieSpecFactory} class to register
     * 
     * @see #getCookieSpec(String)
     */
    public synchronized void register(final String name, final CookieSpecFactory factory) {
         if (name == null) {
             throw new IllegalArgumentException("Name may not be null");
         }
        if (factory == null) {
            throw new IllegalArgumentException("Cookie spec factory may not be null");
        }
        registeredSpecs.put(name.toLowerCase(Locale.ENGLISH), factory);
    }

    /**
     * Unregisters the {@link CookieSpecFactory} with the given ID.
     * 
     * @param id the identifier of the {@link CookieSpec cookie specification} to unregister
     */
    public synchronized void unregister(final String id) {
         if (id == null) {
             throw new IllegalArgumentException("Id may not be null");
         }
         registeredSpecs.remove(id.toLowerCase(Locale.ENGLISH));
    }

    /**
     * Gets the {@link CookieSpec cookie specification} with the given ID.
     * 
     * @param name the {@link CookieSpec cookie specification} identifier
     * @param params the {@link HttpParams HTTP parameters} for the cookie
     *  specification. 
     * 
     * @return {@link CookieSpec cookie specification}
     * 
     * @throws IllegalStateException if a policy with the given name cannot be found
     */
    public synchronized CookieSpec getCookieSpec(final String name, final HttpParams params) 
        throws IllegalStateException {

        if (name == null) {
            throw new IllegalArgumentException("Name may not be null");
        }
        CookieSpecFactory factory = registeredSpecs.get(name.toLowerCase(Locale.ENGLISH));
        if (factory != null) {
            return factory.newInstance(params);
        } else {
            throw new IllegalStateException("Unsupported cookie spec: " + name);
        }
    } 

    /**
     * Gets the {@link CookieSpec cookie specification} with the given name.
     * 
     * @param name the {@link CookieSpec cookie specification} identifier
     * 
     * @return {@link CookieSpec cookie specification}
     * 
     * @throws IllegalStateException if a policy with the given name cannot be found
     */
    public synchronized CookieSpec getCookieSpec(final String name) 
        throws IllegalStateException {
        return getCookieSpec(name, null);
    } 

    /**
     * Obtains a list containing names of all registered {@link CookieSpec cookie 
     * specs} in their default order.
     * 
     * Note that the DEFAULT policy (if present) is likely to be the same
     * as one of the other policies, but does not have to be.
     * 
     * @return list of registered cookie spec names
     */
    public synchronized List<String> getSpecNames(){
        return new ArrayList<String>(registeredSpecs.keySet()); 
    }
    
    /**
     * Populates the internal collection of registered {@link CookieSpec cookie 
     * specs} with the content of the map passed as a parameter.
     * 
     * @param map cookie specs
     */
    public synchronized void setItems(final Map<String, CookieSpecFactory> map) {
        if (map == null) {
            return;
        }
        registeredSpecs.clear();
        registeredSpecs.putAll(map);
    }

}

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