mavibot-partition/src/main/java/org/apache/directory/server/core/partition/impl/btree/mavibot/MavibotIndex.java [144:210]:
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            throw e;
        }

        initialized = true;
    }


    /**
     * Initializes the forward and reverse tables used by this Index.
     *
     * @param schemaManager The server schemaManager
     * @throws IOException if we cannot initialize the forward and reverse
     * tables
     */
    private void initTables( SchemaManager schemaManager ) throws IOException
    {
        MatchingRule mr = attributeType.getEquality();

        if ( mr == null )
        {
            throw new IOException( I18n.err( I18n.ERR_574, attributeType.getName() ) );
        }

        SerializableComparator<K> comp = new SerializableComparator<>( mr.getOid() );
        comp.setSchemaManager( schemaManager );

        /*
         * The forward key/value map stores attribute values to master table
         * primary keys.  A value for an attribute can occur several times in
         * different entries so the forward map can have more than one value.
         */

        ElementSerializer<K> forwardKeySerializer = null;

        if ( !attributeType.getSyntax().isHumanReadable() )
        {
            forwardKeySerializer = ( ElementSerializer<K> ) new ByteArraySerializer( ( Comparator<byte[]> ) comp );
        }
        else
        {
            forwardKeySerializer = ( ElementSerializer<K> ) new StringSerializer( ( Comparator<String> ) comp );
        }

        boolean forwardDups = true;

        String oid = attributeType.getOid();
        // disable duplicates for entryCSN and entryUUID attribute indices
        if ( oid.equals( SchemaConstants.ENTRY_CSN_AT_OID ) || oid.equals( SchemaConstants.ENTRY_UUID_AT_OID ) )
        {
            forwardDups = false;
        }

        String forwardTableName = attributeType.getOid() + FORWARD_BTREE;
        forward = new MavibotTable<>( recordMan, schemaManager, forwardTableName, forwardKeySerializer,
            StringSerializer.INSTANCE, forwardDups, AbstractBTreePartition.DEFAULT_CACHE_SIZE );

        /*
         * Now the reverse map stores the primary key into the master table as
         * the key and the values of attributes as the value.  If an attribute
         * is single valued according to its specification based on a schema
         * then duplicate keys should not be allowed within the reverse table.
         */
        if ( withReverse )
        {
            String reverseTableName = attributeType.getOid() + REVERSE_BTREE;
            reverse = new MavibotTable<>( recordMan, schemaManager, reverseTableName, StringSerializer.INSTANCE,
                forwardKeySerializer, !attributeType.isSingleValued() );
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mavibotv2-partition/src/main/java/org/apache/directory/server/core/partition/impl/btree/mavibot/MavibotIndex.java [144:210]:
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            throw e;
        }

        initialized = true;
    }


    /**
     * Initializes the forward and reverse tables used by this Index.
     *
     * @param schemaManager The server schemaManager
     * @throws IOException if we cannot initialize the forward and reverse
     * tables
     */
    private void initTables( SchemaManager schemaManager ) throws IOException
    {
        MatchingRule mr = attributeType.getEquality();

        if ( mr == null )
        {
            throw new IOException( I18n.err( I18n.ERR_574, attributeType.getName() ) );
        }

        SerializableComparator<K> comp = new SerializableComparator<>( mr.getOid() );
        comp.setSchemaManager( schemaManager );

        /*
         * The forward key/value map stores attribute values to master table
         * primary keys.  A value for an attribute can occur several times in
         * different entries so the forward map can have more than one value.
         */

        ElementSerializer<K> forwardKeySerializer = null;

        if ( !attributeType.getSyntax().isHumanReadable() )
        {
            forwardKeySerializer = ( ElementSerializer<K> ) new ByteArraySerializer( ( Comparator<byte[]> ) comp );
        }
        else
        {
            forwardKeySerializer = ( ElementSerializer<K> ) new StringSerializer( ( Comparator<String> ) comp );
        }

        boolean forwardDups = true;

        String oid = attributeType.getOid();
        // disable duplicates for entryCSN and entryUUID attribute indices
        if ( oid.equals( SchemaConstants.ENTRY_CSN_AT_OID ) || oid.equals( SchemaConstants.ENTRY_UUID_AT_OID ) )
        {
            forwardDups = false;
        }

        String forwardTableName = attributeType.getOid() + FORWARD_BTREE;
        forward = new MavibotTable<>( recordMan, schemaManager, forwardTableName, forwardKeySerializer,
            StringSerializer.INSTANCE, forwardDups, AbstractBTreePartition.DEFAULT_CACHE_SIZE );

        /*
         * Now the reverse map stores the primary key into the master table as
         * the key and the values of attributes as the value.  If an attribute
         * is single valued according to its specification based on a schema
         * then duplicate keys should not be allowed within the reverse table.
         */
        if ( withReverse )
        {
            String reverseTableName = attributeType.getOid() + REVERSE_BTREE;
            reverse = new MavibotTable<>( recordMan, schemaManager, reverseTableName, StringSerializer.INSTANCE,
                forwardKeySerializer, !attributeType.isSingleValued() );
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