org.mmbase.datatypes
Class NodeDataType

java.lang.Object
  org.mmbase.core.AbstractDescriptor
      org.mmbase.datatypes.BasicDataType<Node>
          org.mmbase.datatypes.NodeDataType

All Implemented Interfaces:

Serializable, Cloneable, Comparable<DataType<Node>>, Descriptor, DataType<Node>, PublicCloneable<AbstractDescriptor>

Direct Known Subclasses:

UserNodeDataType

public class NodeDataType
extends BasicDataType<Node>

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 41987 2010-04-20 16:14:35Z michiel $

Author:

Pierre van Rooden, Michiel Meeuwissen

See Also:

Serialized Form

Nested Class Summary

protected class

NodeDataType.MustExistRestriction

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

BasicDataType.AbstractRestriction<D extends Serializable>, BasicDataType.DataTypeComparator<D>, BasicDataType.EnumerationRestriction, BasicDataType.RequiredRestriction, BasicDataType.RestrictedEnumerationIterator, BasicDataType.StaticAbstractRestriction<D extends Serializable>, BasicDataType.TypeRestriction, BasicDataType.UniqueRestriction

Nested classes/interfaces inherited from interface org.mmbase.datatypes.DataType

DataType.Restriction<D extends Serializable>

Field Summary

protected NodeDataType.MustExistRestriction

mustExistRestriction

Fields inherited from class org.mmbase.datatypes.BasicDataType

DATATYPE_BUNDLE, defaultValue, 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, ENFORCE_ONVALIDATE, PROCESS_GET, PROCESS_SET, VALID, XMLNS

Constructor Summary

NodeDataType(String name)
Constructor for node field.

Method Summary

Integer	castForSearch(Object value, Node node, Field field) Sometimes the the representation of the value is a bit different in the database, or has a different type.
protected Object	castToValidate(Object value, Node node, Field field) Before validating the value, the value will be 'cast', 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.
Comparator<Node>	getComparator()
int	getEnforceStrength() The maximum enforce strength of all restrictions on this datatype.
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<LocalizedString>	validateCastValue(Collection<LocalizedString> errors, Object castValue, Object value, Node node, Field field)

Methods inherited from class org.mmbase.datatypes.BasicDataType

addErrorDescription, addRestriction, addRestriction, addStyleClass, cast, cast, castAndValidate, castOrException, castToPresent, checkType, clone, clone, compareTo, edit, equals, finish, finish, getBaseType, getBaseTypeIdentifier, getCloud, getCloud, getCommitProcessor, getDefaultProcessor, getDefaultValue, getDefaultValue, getDeleteProcessor, getElement, getElement, getEnforceString, getEnumerationFactory, getEnumerationRestriction, getEnumerationValue, getEnumerationValues, getHandler, getHandlers, getOrigin, getProcessor, getProcessor, getProcessorWithoutDefault, getRequiredRestriction, getRestrictions, getStyleClasses, getTypeAsClass, getUniqueRestriction, hashCode, inherit, inheritProperties, isCorrectType, isFinished, isRequired, isUnique, preCast, preCast, preCast, rewrite, setCommitProcessor, setDefaultProcessor, setDefaultValue, setDeleteProcessor, setProcessor, setProcessor, setRequired, setUnique, setXml, toString, toStringBuilder, toXml, toXml, validate, validate, validateCastValueOrNull, validateRequired, xmlValue

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 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<Node>

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<Node>

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 'cast', 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<Node>

Throws:

CastException

castForSearch

public Integer castForSearch(Object value,
                             Node node,
                             Field field)

Description copied from interface: DataType

Sometimes the the representation of the value is a bit different in the database, or has a different type. So when constraining a search on the value, casting is done by this. This may default to DataType.cast(Object, Node, Field).

Specified by:

castForSearch in interface DataType<Node>

Overrides:

castForSearch in class BasicDataType<Node>

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 NodeDataType.MustExistRestriction getMustExistRestriction()

getEnforceStrength

public int getEnforceStrength()

Description copied from interface: DataType

The maximum enforce strength of all restrictions on this datatype. See DataType.ENFORCE_ALWAYS, DataType.ENFORCE_ONCHANGE, DataType.ENFORCE_NEVER.

Specified by:

getEnforceStrength in interface DataType<Node>

Overrides:

getEnforceStrength in class BasicDataType<Node>

Returns:

maximum enforce strength

validateCastValue

protected Collection<LocalizedString> validateCastValue(Collection<LocalizedString> errors,
                                                        Object castValue,
                                                        Object value,
                                                        Node node,
                                                        Field field)

Overrides:

validateCastValue in class BasicDataType<Node>

getComparator

public Comparator<Node> getComparator()

Overrides:

getComparator in class BasicDataType<Node>

Since:

MMBase-1.9.2