org.mmbase.module.core
Class VirtualReferrerBuilder

java.lang.Object
  org.mmbase.util.functions.FunctionProvider
      org.mmbase.module.core.MMTable
          org.mmbase.module.core.MMObjectBuilder
              org.mmbase.module.core.VirtualBuilder
                  org.mmbase.module.core.VirtualReferrerBuilder

All Implemented Interfaces:

EventListener, NodeEventListener, RelationEventListener

public class VirtualReferrerBuilder

extends VirtualBuilder

VirtualBuilder is a builder which creates 'virtual' nodes. This class is intended to facilitate practical creation of virtual builders by capturing events that migth otherwise lead to unexpected or faulty behavior.

Since:

MMBase-1.7

Version:

$Id: VirtualReferrerBuilder.java,v 1.5 2005/10/06 17:46:39 michiel Exp $

Author:

Pierre van Rooden

Field Summary

Fields inherited from class org.mmbase.module.core.MMObjectBuilder

AGE_PARAMETERS, broadCastChanges, DEFAULT_ALINEA, DEFAULT_EOL, description, descriptions, EVENT_TYPE_LOCAL, EVENT_TYPE_REMOTE, FIELD_NUMBER, FIELD_OBJECT_TYPE, FIELD_OWNER, fields, genericBlobCache, getFunctions, GUI_PARAMETERS, guiFunction, infoFunction, internalVersion, nodeCache, oType, searchAge, SYSTEM_OWNER, TEMPNODE_DEFAULT_SIZE, temporaryNodes, TMP_FIELD_NUMBER, virtual, WRAP_PARAMETERS, wrapFunction

Fields inherited from class org.mmbase.module.core.MMTable

maxNodesFromQuery, mmb, storageConnector, tableName

Fields inherited from class org.mmbase.util.functions.FunctionProvider

functions

Constructor Summary

VirtualReferrerBuilder(MMObjectBuilder originalBuilder)
Creates an instance of a Virtual builder.

Method Summary

String	getGUIIndicator(MMObjectNode node) What should a GUI display for this node.
Object	getOriginalBuilder() Returns the original builder
Object	getValue(MMObjectNode node, String field) Provides additional functionality when obtaining field values.

Methods inherited from class org.mmbase.module.core.VirtualBuilder

create, getDBState, getFields, getNewNode, getShortedByte, getShortedText, init, insert

Methods inherited from class org.mmbase.module.core.MMObjectBuilder

addEventListener, addField, addLocalObserver, addRemoteObserver, broadcastChanges, checkAddTmpField, clearBlobCache, commit, createAlias, createAlias, delete, equals, equals, executeFunction, executeFunction, fieldLocalChanged, getAncestors, getBlobCache, getClassName, getConfigFile, getConfigResource, getDataTypeCollector, getDBKey, getDBType, getDefaultTeaser, getDefaultUrl, getDescendants, getDescription, getDescription, getDescriptions, getEditFields, getEmptyNode, getField, getFieldNames, getFields, getFields, getFunction, getFunctionParameters, getFunctions, getGUIIndicator, getGUIIndicator, getHardNode, getHardNode, getHTML, getInitParameter, getInitParameters, getInternalVersion, getList, getLocaleGUIIndicator, getLocaleGUIIndicator, getMachineName, getMaintainer, getNewTmpNode, getNextField, getNextField, getNode, getNode, getNode, getNodeFromCache, getNodeGUIIndicator, getNumber, getObjectType, getObjectValue, getParentBuilder, getPluralName, getPluralName, getPluralNames, getRelations_main, getSearchAge, getShort, getSingularName, getSingularName, getSingularNames, getSmartPath, getSortedFields, getSortedListFields, getTmpNode, getURLEncode, getVersion, getWAP, getXMLPath, hasField, hashCode, hashCode, hostname_function, insert, isExtensionOf, isNodeCached, isVirtual, newFunctionInstance, nodeLocalChanged, nodeRemoteChanged, notify, notify, preCommit, process, putTmpNode, removeEventListener, removeField, removeLocalObserver, removeNode, removeRelations, removeRemoteObserver, removeSyncNodes, removeTmpNode, replace, safeCache, sendFieldChangeSignal, setDefaults, setDescription, setDescriptions, setFields, setInitParameter, setMaintainer, setParentBuilder, setPluralNames, setSearchAge, setSingularNames, setUniqueValue, setUniqueValue, setValue, setValue, setVersion, setXMLPath, testValidData, toString, toString, update, updateFields, wrap

Methods inherited from class org.mmbase.module.core.MMTable

count, count, created, getFullTableName, getMMBase, getNode, getNodes, getNodes, getNodes, getNodeType, getStorageConnector, getTableName, search, searchVector, setMMBase, setTableName, size

Methods inherited from class org.mmbase.util.functions.FunctionProvider

addFunction, createParameters, getFunction, getFunctions, getFunctionValue

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

VirtualReferrerBuilder

public VirtualReferrerBuilder(MMObjectBuilder originalBuilder)

Creates an instance of a Virtual builder. A builder instantiated with this constrcutor is not registered in MMBase and should only be used as a temporary parent for virtual nodes which do not have a long life span.

Method Detail

getGUIIndicator

public String getGUIIndicator(MMObjectNode node)

What should a GUI display for this node.

Overrides:

getGUIIndicator in class VirtualBuilder

Parameters:

node - The node to display

Returns:

either the name field of the node or "no info"

getValue

public Object getValue(MMObjectNode node,
                       String field)

Provides additional functionality when obtaining field values.

Overrides:

getValue in class MMObjectBuilder

Parameters:

node - the node who setfields are queried

field - the fieldname that is requested

Returns:

the result of the 'function', or null if no valid functions could be determined.

getOriginalBuilder

public Object getOriginalBuilder()

Returns the original builder