001    /*
002     * Copyright 2004 Stephen J. McConnell.
003     *
004     * Licensed  under the  Apache License,  Version 2.0  (the "License");
005     * you may not use  this file  except in  compliance with the License.
006     * You may obtain a copy of the License at
007     *
008     *   http://www.apache.org/licenses/LICENSE-2.0
009     *
010     * Unless required by applicable law or agreed to in writing, software
011     * distributed  under the  License is distributed on an "AS IS" BASIS,
012     * WITHOUT  WARRANTIES OR CONDITIONS  OF ANY KIND, either  express  or
013     * implied.
014     *
015     * See the License for the specific language governing permissions and
016     * limitations under the License.
017     */
018    
019    package net.dpml.metro.info;
020    
021    import net.dpml.lang.Enum;
022    
023    /**
024     * Collection policy enummeration.
025     * @author <a href="http://www.dpml.net">Digital Product Meta Library</a>
026     * @version 1.0.0
027     */
028    public final class ThreadSafePolicy extends Enum
029    {
030        //-------------------------------------------------------------------
031        // static
032        //-------------------------------------------------------------------
033    
034       /**
035        * Serial version identifier.
036        */
037        static final long serialVersionUID = 1L;
038    
039       /**
040        * Weak collection policy.
041        */
042        public static final ThreadSafePolicy TRUE = new ThreadSafePolicy( "true" );
043    
044       /**
045        * Soft collection policy.
046        */
047        public static final ThreadSafePolicy FALSE = new ThreadSafePolicy( "false" );
048    
049       /**
050        * Hard collection policy.
051        */
052        public static final ThreadSafePolicy UNKNOWN = new ThreadSafePolicy( "unknown" );
053    
054       /**
055        * Array of static thread-safe policy enumeration values.
056        */
057        private static final ThreadSafePolicy[] ENUM_VALUES = 
058          new ThreadSafePolicy[]{TRUE, FALSE, UNKNOWN};
059    
060       /**
061        * Returns an array of policy enum values.
062        * @return the policies array
063        */
064        public static ThreadSafePolicy[] values()
065        {
066            return ENUM_VALUES;
067        }
068            
069       /**
070        * Internal constructor.
071        * @param label the enumeration label.
072        */
073        private ThreadSafePolicy( String label )
074        {
075            super( label );
076        }
077       
078       /**
079        * Parse the supplied name.
080        * @param value the value to parse
081        * @return the policy value
082        */
083        public static ThreadSafePolicy parse( String value )
084        {
085            if( value.equalsIgnoreCase( "true" ) )
086            {
087                return TRUE;
088            }
089            else if( value.equalsIgnoreCase( "false" ) )
090            {
091                return FALSE;
092            }
093            else if( value.equalsIgnoreCase( "unknown" ) )
094            {
095                return UNKNOWN;
096            }
097            else
098            {
099                throw new IllegalArgumentException( value );
100            }
101        }
102    }