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 */
020package org.apache.directory.shared.ldap.aci;
021
022import java.text.ParseException;
023
024import org.apache.directory.shared.ldap.model.constants.SchemaConstants;
025import org.apache.directory.shared.ldap.model.schema.SchemaManager;
026import org.apache.directory.shared.ldap.model.schema.SyntaxChecker;
027import org.apache.directory.shared.util.Strings;
028import org.slf4j.Logger;
029import org.slf4j.LoggerFactory;
030
031
032/**
033 * A SyntaxChecker which verifies that a value is a valid ACIItem.
034 * 
035 *  
036 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
037 */
038@SuppressWarnings("serial")
039public class ACIItemSyntaxChecker extends SyntaxChecker
040{
041    /** A logger for this class */
042    private static final Logger LOG = LoggerFactory.getLogger( ACIItemSyntaxChecker.class );
043
044    /** An instance of ACI Item Checker */
045    private ACIItemChecker aciItemChecker;
046
047    /**
048     * Creates a new instance of ACIItemSyntaxChecker
049     */
050    public ACIItemSyntaxChecker()
051    {
052        super( SchemaConstants.ACI_ITEM_SYNTAX );
053    }
054
055
056    /**
057     * {@inheritDoc}
058     */
059    public boolean isValidSyntax( Object value )
060    {
061        String strValue = null;
062
063        if ( value == null )
064        {
065            LOG.debug( "Syntax invalid for 'null'" );
066            return false;
067        }
068        
069        if ( value instanceof String )
070        {
071            strValue = ( String ) value;
072        }
073        else if ( value instanceof byte[] )
074        {
075            strValue = Strings.utf8ToString((byte[]) value);
076        }
077        else
078        {
079            strValue = value.toString();
080        }
081
082        if ( strValue.length() == 0 )
083        {
084            LOG.debug( "Syntax invalid for '{}'", value );
085            return false;
086        }
087
088        try
089        {
090            synchronized( aciItemChecker )
091            {
092                aciItemChecker.parse( strValue );
093            }
094            
095            LOG.debug( "Syntax valid for '{}'", value );
096            return true;
097        }
098        catch ( ParseException pe )
099        {
100            LOG.debug( "Syntax invalid for '{}'", value );
101            return false;
102        }
103    }
104
105
106    /**
107     * {@inheritDoc}
108     */
109    public void setSchemaManager( SchemaManager schemaManager )
110    {
111        aciItemChecker = new ACIItemChecker( schemaManager );
112    }
113}