001    /*
002     *  Licensed to the Apache Software Foundation (ASF) under one
003     *  or more contributor license agreements.  See the NOTICE file
004     *  distributed with this work for additional information
005     *  regarding copyright ownership.  The ASF licenses this file
006     *  to you under the Apache License, Version 2.0 (the
007     *  "License"); you may not use this file except in compliance
008     *  with the License.  You may obtain a copy of the License at
009     *  
010     *    http://www.apache.org/licenses/LICENSE-2.0
011     *  
012     *  Unless required by applicable law or agreed to in writing,
013     *  software distributed under the License is distributed on an
014     *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015     *  KIND, either express or implied.  See the License for the
016     *  specific language governing permissions and limitations
017     *  under the License. 
018     *  
019     */
020    package org.apache.directory.shared.ldap.schema.syntaxes;
021    
022    
023    import org.apache.directory.shared.ldap.constants.SchemaConstants;
024    import org.apache.directory.shared.ldap.schema.AbstractSyntaxChecker;
025    import org.apache.directory.shared.ldap.util.StringTools;
026    
027    
028    /**
029     * A SyntaxChecker which verifies that a value is a PostalAddress according to 
030     * RFC 4517 :
031     * 
032     * <postal-address> = <dstring> <dstring-list>
033     * <dstring-list> = "$" <dstring> <dstring-list> | e
034     * 
035     * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
036     * @version $Rev$
037     */
038    public class PostalAddressSyntaxChecker extends AbstractSyntaxChecker
039    {
040        /**
041         * 
042         * Creates a new instance of PostalAddressSyntaxChecker.
043         *
044         */
045        public PostalAddressSyntaxChecker()
046        {
047            super( SchemaConstants.POSTAL_ADDRESS_SYNTAX );
048        }
049        
050        /**
051         * 
052         * Creates a new instance of PostalAddressSyntaxChecker.
053         * 
054         * @param oid the oid to associate with this new SyntaxChecker
055         *
056         */
057        protected PostalAddressSyntaxChecker( String oid )
058        {
059            super( oid );
060        }
061        
062        
063        /* (non-Javadoc)
064         * @see org.apache.directory.shared.ldap.schema.SyntaxChecker#isValidSyntax(java.lang.Object)
065         */
066        public boolean isValidSyntax( Object value )
067        {
068            String strValue = null;
069    
070            if ( value == null )
071            {
072                return false;
073            }
074            
075            if ( value instanceof String )
076            {
077                strValue = ( String ) value;
078            }
079            else if ( value instanceof byte[] )
080            {
081                strValue = StringTools.utf8ToString( ( byte[] ) value ); 
082            }
083            else
084            {
085                strValue = value.toString();
086            }
087    
088            if ( strValue.length() == 0 )
089            {
090                return false;
091            }
092    
093            // Search for the '$' separator
094            int dollar = strValue.indexOf( '$' );
095            
096            if ( dollar == -1 )
097            {
098                // No '$' => only a dstring
099                return true;
100            }
101    
102            int pos = 0;
103            do
104            {
105                // check that the element between each '$' is not empty
106                String address = strValue.substring( pos, dollar );
107                
108                if ( StringTools.isEmpty( address ) )
109                {
110                    return false;
111                }
112                
113                pos = dollar + 1;
114                
115                if ( pos == strValue.length() )
116                {
117                    // we should not have a '$' at the end
118                    return false;
119                }
120                
121                dollar = strValue.indexOf( '$', pos );
122            } while ( dollar > -1 );
123            
124            return true;
125        }
126    }