/*
 *  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. 
 *  
 */
package org.apache.directory.shared.ldap.model.schema.syntaxCheckers;


import org.apache.directory.shared.ldap.model.constants.SchemaConstants;
import org.apache.directory.shared.ldap.model.schema.SyntaxChecker;
import org.apache.directory.shared.util.Strings;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;


/**
 * A SyntaxChecker which verifies that a value is a valid Search Scope. We
 * have three possible values :
 * <ul>
 * <li>OBJECT</li>
 * <li>ONE</li>
 * <li>SUBTREE</li>
 * </ul>
 * The value is case insensitive
 *
 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
 */
@SuppressWarnings("serial")
public class SearchScopeSyntaxChecker extends SyntaxChecker
{
    /** A logger for this class */
    private static final Logger LOG = LoggerFactory.getLogger( SearchScopeSyntaxChecker.class );

    /**
     * Creates a new instance of SearchScopeSyntaxChecker.
     */
    public SearchScopeSyntaxChecker()
    {
        super( SchemaConstants.SEARCH_SCOPE_SYNTAX );
    }
    
    
    /**
     * {@inheritDoc}
     */
    public boolean isValidSyntax( Object value )
    {
        String strValue = null;

        if ( value == null )
        {
            LOG.debug( "Syntax invalid for 'null'" );
            return false;
        }
        
        if ( value instanceof String )
        {
            strValue = ( String ) value;
        }
        else if ( value instanceof byte[] )
        {
            strValue = Strings.utf8ToString((byte[]) value);
        }
        else
        {
            strValue = value.toString();
        }

        strValue = Strings.trim( Strings.toLowerCase( strValue ) );
        
        return ( "object".equals( strValue ) || "one".equals(  strValue ) || "subtree".equals( strValue ) );
    }
}

@@ -2525,14 +2525,12 @@
  ( %22
-object
+base
 %22.eq
@@ -2586,12 +2586,8 @@
 %22sub
-tree
 %22.eq

use the same string values that are used in SearchScope enum