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PrivateConstructorAccess

Kind of class:	internal class
Package:	com.bourre.ioc.core
Inherits from:	none
Classpath:	com.bourre.ioc.core.PrivateConstructorAccess
File last modified:	Friday, 13 June 2008, 10:43:44
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package com.bourre.ioc.core
{
    /*
     * Copyright the original author or authors.
     * 
     * Licensed under the MOZILLA PUBLIC LICENSE, Version 1.1 (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.mozilla.org/MPL/MPL-1.1.html
     * 
     * 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.
     */

    /**
     * @author Francis Bourre
     * @version 1.0
     */
    import flash.utils.Dictionary;
    
    import com.bourre.error.IllegalArgumentException;
    import com.bourre.error.NoSuchElementException;
    import com.bourre.log.PixlibDebug;
    import com.bourre.log.PixlibStringifier;    

    public class IDExpert
    {
        private static var _oI : IDExpert;

        private var _d : Dictionary;

        /**
         * @return singleton instance of IDExpert
         */
        public static function getInstance() : IDExpert 
        {
            if ( !(IDExpert._oI is IDExpert) ) IDExpert._oI = new IDExpert( new PrivateConstructorAccess() );
            return IDExpert._oI;
        }
        
        public static function release() : void
        {
            if ( IDExpert._oI is IDExpert ) IDExpert._oI = null;
        }

        public function IDExpert( access : PrivateConstructorAccess )
        {
            _d = new Dictionary( true );
        }

        public function isRegistered( id : String ) : Boolean
        {
            return _d[ id ] == true;
        }

        public function clear() : void
        {
            _d = new Dictionary( true );
        }
        
        public function register( id : String ) : Boolean
        {
            if (  _d[ id ] ) 
            {
                var msg : String = this + ".register(" + id + ") failed. This id was already registered, check conflicts in your config file.";
                PixlibDebug.ERROR( msg );
                throw( new IllegalArgumentException( msg ) );

            } else
            {
                _d[ id ] = true;
                return true;
            }

            return false;
        }
        
        public function unregister( id : String ) : Boolean
        {
            if ( isRegistered( id ) ) 
            {
                _d[ id ] = false;
                return true;

            } else
            {
                var msg : String =  this + ".unregister(" + id + ") failed.";
                PixlibDebug.ERROR( msg );
                throw( new NoSuchElementException( msg ) );
            }

            return false;
        }

        /**
         * Returns the string representation of this instance.
         * @return the string representation of this instance
         */
        public function toString() : String 
        {
            return PixlibStringifier.stringify( this );
        }
    }
}

internal class PrivateConstructorAccess {}