/*
    *  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.api.ldap.model.schema.registries;
  
  
  import java.util.HashMap;
  import java.util.Iterator;
  import java.util.Map;
  
  import org.apache.directory.api.i18n.I18n;
  import org.apache.directory.api.ldap.model.exception.LdapException;
  import org.apache.directory.api.ldap.model.schema.DitStructureRule;
  import org.apache.directory.api.ldap.model.schema.SchemaObject;
  import org.apache.directory.api.ldap.model.schema.SchemaObjectType;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  
  /**
   * A DitStructureRule registry's service default implementation.
   *
   * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
   */
  public class DefaultDitStructureRuleRegistry extends DefaultSchemaObjectRegistry<DitStructureRule>
      implements DitStructureRuleRegistry
  {
      /** static class logger */
      private static final Logger LOG = LoggerFactory.getLogger( DefaultDitStructureRuleRegistry.class );
  
      /** A speedup for debug */
      private static final boolean DEBUG = LOG.isDebugEnabled();
  
      /** a map of DitStructureRule looked up by RuleId */
      protected Map<Integer, DitStructureRule> byRuleId;
  
  
      /**
       * Creates a new default NormalizerRegistry instance.
       */
      public DefaultDitStructureRuleRegistry()
      {
          super( SchemaObjectType.DIT_STRUCTURE_RULE, new OidRegistry<DitStructureRule>() );
          byRuleId = new HashMap<Integer, DitStructureRule>();
      }
  
  
      /**
       * {@inheritDoc}
       */
      public boolean contains( int ruleId )
      {
          return byRuleId.containsKey( ruleId );
      }
  
  
      /**
       * {@inheritDoc}
       */
      public Iterator<DitStructureRule> iterator()
      {
          return byRuleId.values().iterator();
      }
  
  
      /**
       * {@inheritDoc}
       */
      public Iterator<Integer> ruleIdIterator()
      {
          return byRuleId.keySet().iterator();
      }
  
  
      /**
       * {@inheritDoc}
       */
      public String getSchemaName( int ruleId ) throws LdapException
      {
          DitStructureRule ditStructureRule = byRuleId.get( ruleId );
  
          if ( ditStructureRule != null )
          {
             return ditStructureRule.getSchemaName();
         }
 
         String msg = I18n.err( I18n.ERR_04263, ruleId );
         LOG.warn( msg );
         throw new LdapException( msg );
     }
 
 
     /**
      * {@inheritDoc}
      */
     public void register( DitStructureRule ditStructureRule ) throws LdapException
     {
         int ruleId = ditStructureRule.getRuleId();
 
         if ( byRuleId.containsKey( ruleId ) )
         {
             String msg = I18n.err( I18n.ERR_04264, ruleId );
             LOG.warn( msg );
             throw new LdapException( msg );
         }
 
         byRuleId.put( ruleId, ditStructureRule );
 
         if ( LOG.isDebugEnabled() )
         {
             LOG.debug( "registered {} for OID {}", ditStructureRule, ruleId );
         }
     }
 
 
     /**
      * {@inheritDoc}
      */
     public DitStructureRule lookup( int ruleId ) throws LdapException
     {
         DitStructureRule ditStructureRule = byRuleId.get( ruleId );
 
         if ( ditStructureRule == null )
         {
             String msg = I18n.err( I18n.ERR_04265, ruleId );
             LOG.debug( msg );
             throw new LdapException( msg );
         }
 
         if ( DEBUG )
         {
             LOG.debug( "Found {} with ruleId: {}", ditStructureRule, ruleId );
         }
 
         return ditStructureRule;
     }
 
 
     /**
      * {@inheritDoc}
      */
     public void unregister( int ruleId ) throws LdapException
     {
         DitStructureRule ditStructureRule = byRuleId.remove( ruleId );
 
         if ( DEBUG )
         {
             LOG.debug( "Removed {} with ruleId {} from the registry", ditStructureRule, ruleId );
         }
     }
 
 
     /**
      * {@inheritDoc}
      */
     public void unregisterSchemaElements( String schemaName )
     {
         if ( schemaName == null )
         {
             return;
         }
 
         // Loop on all the SchemaObjects stored and remove those associated
         // with the give schemaName
         for ( DitStructureRule ditStructureRule : this )
         {
             if ( schemaName.equalsIgnoreCase( ditStructureRule.getSchemaName() ) )
             {
                 int ruleId = ditStructureRule.getRuleId();
                 SchemaObject removed = byRuleId.remove( ruleId );
 
                 if ( DEBUG )
                 {
                     LOG.debug( "Removed {} with ruleId {} from the registry", removed, ruleId );
                 }
             }
         }
     }
 
 
     /**
      * {@inheritDoc}
      */
     public void renameSchema( String originalSchemaName, String newSchemaName )
     {
         // Loop on all the SchemaObjects stored and remove those associated
         // with the give schemaName
         for ( DitStructureRule ditStructureRule : this )
         {
             if ( originalSchemaName.equalsIgnoreCase( ditStructureRule.getSchemaName() ) )
             {
                 ditStructureRule.setSchemaName( newSchemaName );
 
                 if ( DEBUG )
                 {
                     LOG.debug( "Renamed {} schemaName to {}", ditStructureRule, newSchemaName );
                 }
             }
         }
     }
 
 
     /**
      * {@inheritDoc}
      */
     public DefaultDitStructureRuleRegistry copy()
     {
         DefaultDitStructureRuleRegistry copy = new DefaultDitStructureRuleRegistry();
 
         // Copy the base data
         copy.copy( this );
 
         return copy;
     }
 }