private void modifyIncrement()

in xdbm-partition/src/main/java/org/apache/directory/server/core/partition/impl/btree/AbstractBTreePartition.java [1761:1902]
105 lines of code
23 McCabe index (conditional complexity)

    private void modifyIncrement( PartitionTxn partitionTxn, String id, Entry entry, Attribute mods ) 
        throws LdapException, IndexNotFoundException
    {
        if ( entry instanceof ClonedServerEntry )
        {
            throw new LdapOtherException( I18n.err( I18n.ERR_49007_CANNOT_STORE_CLONED_SERVER_ENTRY ) );
        }

        String modsOid = schemaManager.getAttributeTypeRegistry().getOidByName( mods.getId() );
        AttributeType attributeType = mods.getAttributeType();

        // Special case for the ObjectClass index
        if ( attributeType.equals( objectClassAT ) )
        {
            // if the id exists in the index drop all existing attribute
            // value index entries and add new ones
            for ( Value value : entry.get( objectClassAT ) )
            {
                if ( value.equals( topOCValue ) )
                {
                    continue;
                }
                
                String normalizedOc = objectClassNormalizer.normalize( value.getString() );

                objectClassIdx.drop( partitionTxn, normalizedOc, id );
            }

            for ( Value value : mods )
            {
                if ( value.equals( topOCValue ) )
                {
                    continue;
                }
                
                String normalizedOc = objectClassNormalizer.normalize( value.getString() );

                objectClassIdx.add( partitionTxn, normalizedOc, id );
            }
        }
        else if ( hasUserIndexOn( attributeType ) )
        {
            Index<?, String> userIndex = getUserIndex( attributeType );

            // Drop all the previous values
            Attribute oldAttribute = entry.get( mods.getAttributeType() );

            if ( oldAttribute != null )
            {
                for ( Value value : oldAttribute )
                {
                    String normalized = value.getNormalized();
                    ( ( Index<Object, String> ) userIndex ).drop( partitionTxn, normalized, id );
                }
            }

            // And add the new ones
            for ( Value value : mods )
            {
                String normalized = value.getNormalized();
                ( ( Index ) userIndex ).add( partitionTxn, normalized, id );
            }

            /*
             * If we have no new value, we have to drop the AT fro the presence index
             */
            if ( mods.size() == 0 )
            {
                presenceIdx.drop( partitionTxn, modsOid, id );
            }
        }
        // Special case for the AdministrativeRole index
        else if ( attributeType.equals( administrativeRoleAT ) )
        {
            // Remove the previous values
            for ( Value value : entry.get( administrativeRoleAT ) )
            {
                if ( value.equals( topOCValue ) )
                {
                    continue;
                }
                
                String normalizedOc = objectClassNormalizer.normalize( value.getString() );

                objectClassIdx.drop( partitionTxn, normalizedOc, id );
            }

            // And add the new ones 
            for ( Value value : mods )
            {
                String valueStr = value.getString();

                if ( valueStr.equals( topOCValue.getString() ) )
                {
                    continue;
                }
                
                adminRoleIdx.add( partitionTxn, valueStr, id );
            }
        }

        String aliasAttributeOid = schemaManager.getAttributeTypeRegistry().getOidByName(
            SchemaConstants.ALIASED_OBJECT_NAME_AT );

        if ( mods.getAttributeType().equals( aliasedObjectNameAT ) )
        {
            dropAliasIndices( partitionTxn, id );
        }

        // replaces old attributes with new modified ones if they exist
        Attribute attribute = entry.get( mods.getAttributeType() );
        Value[] newValues = new Value[ attribute.size() ];
        int increment = 1;
        int i = 0;
        
        if ( mods.size() != 0 )
        {
            increment = Integer.parseInt( mods.getString() );
        }

        for ( Value value : attribute )
        {
            int intValue = Integer.parseInt( value.getNormalized() );
            
            if ( intValue >= Integer.MAX_VALUE - increment )
            {
                throw new IllegalArgumentException( "Increment operation overflow for attribute" 
                    + attributeType );
            }
            
            newValues[i++] = new Value( Integer.toString( intValue + increment ) );
            attribute.remove( value );
        }
        
        attribute.add( newValues );

        if ( modsOid.equals( aliasAttributeOid ) && mods.size() > 0 )
        {
            Dn entryDn = getEntryDn( partitionTxn, id );
            addAliasIndices( partitionTxn, id, entryDn, new Dn( schemaManager, mods.getString() ) );
        }
    }