net.sf.basedb.util.overview.loader
Class DataFileLoader

java.lang.Object
  net.sf.basedb.util.overview.loader.AbstractNodeLoader<I>
      net.sf.basedb.util.overview.loader.BasicItemNodeLoader<FileSetMember>
          net.sf.basedb.util.overview.loader.DataFileLoader

All Implemented Interfaces:

NodeLoader<FileSetMember>

public class DataFileLoader
extends BasicItemNodeLoader<FileSetMember>

Node loader implementation for data files. Data files are normally loaded as an end-point folder node with one child entry for each data file. The exception is if there is only one file, in which case the file node itself is loaded. It can never be root node or a forward/reverse-loading node.

Version:

2.10

Author:

Nicklas

Last modified

$Date: 2009-02-11 12:59:25 +0100 (Wed, 11 Feb 2009) $

Field Summary

Fields inherited from class net.sf.basedb.util.overview.loader.BasicItemNodeLoader

ALLOW_ROOT_NODE, allowAsRootNode, DENY_ROOT_NODE, factoryKey, nameGenerator

Constructor Summary

DataFileLoader()

Method Summary

Node	createPropertyNode(DbControl dc, OverviewContext context, Node parentNode) Create a property node for the given parent node.

Methods inherited from class net.sf.basedb.util.overview.loader.BasicItemNodeLoader

createItemNode, createRootNode, getNodeFactory, getNodeFactory, getNodeLoader, getNodeLoaderFactory, getNodeValidator, getNodeValidatorFactory, postValidateFolder

Methods inherited from class net.sf.basedb.util.overview.loader.AbstractNodeLoader

createForwardNode, createReverseNode, loadChildNodes, loadChildNodesOfFolderNode, loadChildNodesOfItemNode, loadForwardChildNodes, loadPropertyChildNodes, loadReverseChildNodes

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DataFileLoader

public DataFileLoader()

Method Detail

createPropertyNode

public Node createPropertyNode(DbControl dc,
                               OverviewContext context,
                               Node parentNode)

Description copied from interface: NodeLoader

Create a property node for the given parent node. A property node is a node that is not on the main parent-child path. It is typically a node that can't be used a root node (for example, a protocol or software). If the parent node can have many properties of this type the loader can decide if it should first create a folder-type node and put the children inside the folder, or if all child nodes should be created directly in the parent node. In the first case, the folder node should be returned. In the latter case, null should be returned.

The direction of the node(s) should usually be ChildNodeDirection.NONE, but it may also be ChildNodeDirection.PROPERTY in case the property has sub-properties. One example is the ProtocolLoader which loads the protocol parameters as child nodes.

In case there is an error (permission denied, etc.) ChildNodeDirection.NONE should be used. If there is no property item null should be returned (but this may also indicate that more than one node was created).

Errors, missing items, etc. should be reported as failures to the OverviewContext.

Specified by:

createPropertyNode in interface NodeLoader<FileSetMember>

Overrides:

createPropertyNode in class AbstractNodeLoader<FileSetMember>

Parameters:

dc - The DbControl to use for database access

context - The overview context

parentNode - The parent node

Returns:

A node (may be a folder-type node with many subnodes), or null