org.mmbase.datatypes
Class NodeDataType

java.lang.Object
  org.mmbase.core.AbstractDescriptor
      org.mmbase.datatypes.BasicDataType
          org.mmbase.datatypes.NodeDataType

All Implemented Interfaces:

Cloneable, Comparable, DataType, Descriptor, Serializable

public class NodeDataType

extends BasicDataType

The Node data type describes a data type which is based on an MMBase 'node' field. So the value is an MMBase node, which can normally be described by a foreign key.

Since:

MMBase-1.8

Version:

$Id: NodeDataType.java,v 1.28 2006/04/27 16:02:18 michiel Exp $

Author:

Pierre van Rooden, Michiel Meeuwissen

See Also:

Serialized Form

Nested Class Summary

Nested classes inherited from class org.mmbase.datatypes.BasicDataType

BasicDataType.AbstractRestriction, BasicDataType.EnumerationRestriction, BasicDataType.RequiredRestriction, BasicDataType.RestrictedEnumerationIterator, BasicDataType.StaticAbstractRestriction, BasicDataType.TypeRestriction, BasicDataType.UniqueRestriction

Nested classes inherited from class org.mmbase.datatypes.DataType

DataType.Restriction

Field Summary

protected org.mmbase.datatypes.NodeDataType.MustExistRestriction

mustExistRestriction

Fields inherited from class org.mmbase.datatypes.BasicDataType

DATATYPE_BUNDLE, enumerationRestriction, origin, requiredRestriction, typeRestriction, uniqueRestriction

Fields inherited from class org.mmbase.core.AbstractDescriptor

description, guiName, key

Fields inherited from interface org.mmbase.datatypes.DataType

ENFORCE_ABSOLUTE, ENFORCE_ALWAYS, ENFORCE_NEVER, ENFORCE_ONCHANGE, ENFORCE_ONCREATE, PROCESS_GET, PROCESS_SET, VALID, XMLNS

Constructor Summary

NodeDataType(String name)
Constructor for node field.

Method Summary

protected Object	castToValidate(Object value, Node node, Field field) Before validating the value, the value will be 'casted', on default this will be to the 'correct' type, but it can be a more generic type sometimes.
protected void	cloneRestrictions(BasicDataType origin) If a datatype is cloned, the restrictions of it (normally implemented as inner classes), must be reinstantiated.
org.mmbase.datatypes.NodeDataType.MustExistRestriction	getMustExistRestriction()
protected void	inheritRestrictions(BasicDataType origin) If a datatype inherits from another datatype all its restrictions inherit too.
boolean	mustExist() Whether the Node of the value must exist XXX MM: How can you have a non-existing node? I don't really get it.
protected Collection	validateCastedValue(Collection errors, Object castedValue, Object value, Node node, Field field)

Methods inherited from class org.mmbase.datatypes.BasicDataType

cast, cast, checkType, clone, clone, compareTo, edit, equals, finish, finish, getBaseType, getBaseTypeIdentifier, getCloud, getCommitProcessor, getDefaultValue, getElement, getElement, getEnumerationFactory, getEnumerationRestriction, getEnumerationValue, getEnumerationValues, getOrigin, getProcessor, getProcessor, getRequiredRestriction, getTypeAsClass, getUniqueRestriction, hashCode, inherit, inheritProperties, isCorrectType, isFinished, isRequired, isUnique, preCast, preCast, preCast, rewrite, setCommitProcessor, setDefaultValue, setProcessor, setProcessor, setRequired, setUnique, setXml, toString, toStringBuffer, toXml, toXml, validate, validate

Methods inherited from class org.mmbase.core.AbstractDescriptor

getDefaultLocale, getDescription, getDescription, getGUIName, getGUIName, getLocalizedDescription, getLocalizedGUIName, getName, setDescription, setDescription, setGUIName, setGUIName, setLocalizedDescription, setLocalizedGUIName

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.mmbase.bridge.Descriptor

getDescription, getDescription, getGUIName, getGUIName, getLocalizedDescription, getLocalizedGUIName, getName, setDescription, setDescription, setGUIName, setGUIName

Field Detail

mustExistRestriction

protected org.mmbase.datatypes.NodeDataType.MustExistRestriction mustExistRestriction

Constructor Detail

NodeDataType

public NodeDataType(String name)

Constructor for node field.

Method Detail

inheritRestrictions

protected void inheritRestrictions(BasicDataType origin)

Description copied from class: BasicDataType

If a datatype inherits from another datatype all its restrictions inherit too.

Overrides:

inheritRestrictions in class BasicDataType

cloneRestrictions

protected void cloneRestrictions(BasicDataType origin)

Description copied from class: BasicDataType

If a datatype is cloned, the restrictions of it (normally implemented as inner classes), must be reinstantiated.

Overrides:

cloneRestrictions in class BasicDataType

castToValidate

protected Object castToValidate(Object value,
                                Node node,
                                Field field)
                         throws CastException

Description copied from class: BasicDataType

Before validating the value, the value will be 'casted', on default this will be to the 'correct' type, but it can be a more generic type sometimes. E.g. for numbers this wil simply cast to Number.

Overrides:

castToValidate in class BasicDataType

Throws:

CastException

mustExist

public boolean mustExist()

Whether the Node of the value must exist XXX MM: How can you have a non-existing node? I don't really get it. AFAIK all nodes exist. especially since a node field is essentially a foreign key.

getMustExistRestriction

public org.mmbase.datatypes.NodeDataType.MustExistRestriction getMustExistRestriction()

validateCastedValue

protected Collection validateCastedValue(Collection errors,
                                         Object castedValue,
                                         Object value,
                                         Node node,
                                         Field field)

Overrides:

validateCastedValue in class BasicDataType