org.mmbase.bridge.util
Class DataTypeField

java.lang.Object
  org.mmbase.core.AbstractDescriptor
      org.mmbase.core.AbstractField
          org.mmbase.bridge.util.DataTypeField

All Implemented Interfaces:

Cloneable, Comparable<Field>, Descriptor, Field, PublicCloneable<AbstractDescriptor>

Direct Known Subclasses:

MockField, MockNodeManager.SystemField

public class DataTypeField
extends AbstractField

Wraps a DataType object into a (virtual) Field object. It can be instantiated with DataTypeField(Cloud, DataType) to have a 'virtual field with a Virtual NodeManager with only one field (itself). The constructor DataTypeField(Field, DataType), produces a new field object, that is very similar to the one wrapped, only with a different DataType. This also a way to associate a Cloud object with a DataType (it is actually possible to see that as the essence of being a Field).

Since:

MMBase-1.8.7

Version:

$Id: DataTypeField.java 39794 2009-11-18 21:43:52Z michiel $

Author:

Michiel Meeuwissen

Field Summary

protected Field	field
protected NodeManager	nodeManager

Fields inherited from class org.mmbase.core.AbstractField

dataType, listItemType, readOnly, state, type

Fields inherited from class org.mmbase.core.AbstractDescriptor

description, guiName, key

Fields inherited from interface org.mmbase.bridge.Field

STATE_PERSISTENT, STATE_SYSTEM, STATE_SYSTEM_VIRTUAL, STATE_UNKNOWN, STATE_VIRTUAL, TYPE_BINARY, TYPE_BOOLEAN, TYPE_BYTE, TYPE_DATETIME, TYPE_DECIMAL, TYPE_DOUBLE, TYPE_FLOAT, TYPE_INTEGER, TYPE_LIST, TYPE_LONG, TYPE_NODE, TYPE_STRING, TYPE_UNKNOWN, TYPE_XML

Constructor Summary

DataTypeField(Cloud cloud, DataType<? extends Object> dataType)

DataTypeField(Field field, DataType<? extends Object> dataType)
This constructor only wraps the given field to have another datatype.

DataTypeField(NodeManager nm, Field f)

DataTypeField(String name, NodeManager nm, DataType<? extends Object> dataType)

Method Summary

int	getEditPosition() Retrieve the position of the field when editing.
String	getGUIType() Returns the GUI name for the data type this field contains.
int	getListPosition() Retrieve the position of the field when listing.
int	getMaxLength() Returns the maximum length of data this field can contain.
NodeManager	getNodeManager() Returns the node manager this field belongs to.
int	getSearchPosition() Retrieve the position of the field when searching.
int	getStoragePosition() Retrieve the position of the field in the database table.
boolean	isReadOnly() Returns whether a field is a read only.
Collection<String>	validate(Object value) Checks whether a given value is valid for this field.

Methods inherited from class org.mmbase.core.AbstractField

clone, clone, compareTo, equals, getDataType, getListItemType, getState, getType, hashCode, hasIndex, isRequired, isTemporary, isUnique, isVirtual, setDataType, setState, toString

Methods inherited from class org.mmbase.core.AbstractDescriptor

clone, 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

nodeManager

protected final NodeManager nodeManager

field

protected final Field field

Constructor Detail

DataTypeField

public DataTypeField(Cloud cloud,
                     DataType<? extends Object> dataType)

DataTypeField

public DataTypeField(NodeManager nm,
                     Field f)

Since:

MMBase-1.9.2

DataTypeField

public DataTypeField(String name,
                     NodeManager nm,
                     DataType<? extends Object> dataType)

Since:

MMBase-1.9.2

DataTypeField

public DataTypeField(Field field,
                     DataType<? extends Object> dataType)

This constructor only wraps the given field to have another datatype.

Since:

MMBase-1.9

Method Detail

getNodeManager

public NodeManager getNodeManager()

Description copied from interface: Field

Returns the node manager this field belongs to.

Specified by:

getNodeManager in interface Field

Specified by:

getNodeManager in class AbstractField

Returns:

the node manager this field belongs to

getSearchPosition

public int getSearchPosition()

Description copied from interface: Field

Retrieve the position of the field when searching. A value of -1 indicates the field is unavailable during search.

Specified by:

getSearchPosition in interface Field

Specified by:

getSearchPosition in class AbstractField

Returns:

position of the field when searching

getListPosition

public int getListPosition()

Description copied from interface: Field

Retrieve the position of the field when listing. A value of -1 indicates the field is unavailable in a list.

Specified by:

getListPosition in interface Field

Specified by:

getListPosition in class AbstractField

Returns:

position of the field when listing

getEditPosition

public int getEditPosition()

Description copied from interface: Field

Retrieve the position of the field when editing. A value of -1 indicates the field cannot be edited.

Specified by:

getEditPosition in interface Field

Specified by:

getEditPosition in class AbstractField

Returns:

position of the field when editing

getStoragePosition

public int getStoragePosition()

Description copied from interface: Field

Retrieve the position of the field in the database table.

Specified by:

getStoragePosition in interface Field

Specified by:

getStoragePosition in class AbstractField

Returns:

position in the database table

getMaxLength

public int getMaxLength()

Description copied from interface: Field

Returns the maximum length of data this field can contain. For example if a field contains characters the size indicates the maximum number of characters it can contain. If the field is a numeric field (such as an integer), the result is -1. For a 'decimal' type though, this returns the same as the precision of the associated datatype.

Specified by:

getMaxLength in interface Field

Specified by:

getMaxLength in class AbstractField

Returns:

the maximum length of data this field can contain

isReadOnly

public boolean isReadOnly()

Description copied from class: AbstractField

Returns whether a field is a read only.

Specified by:

isReadOnly in interface Field

Overrides:

isReadOnly in class AbstractField

Returns:

true when read only

See Also:

Field.isVirtual()

getGUIType

public String getGUIType()

Description copied from interface: Field

Returns the GUI name for the data type this field contains.

Specified by:

getGUIType in interface Field

Specified by:

getGUIType in class AbstractField

Returns:

the GUI name

See Also:

Field.getDataType()

validate

public Collection<String> validate(Object value)

Description copied from interface: Field

Checks whether a given value is valid for this field.

Parameters:

value - value to validate

Returns:

Collection of error-strings (describing the problem) in the current locale, or an empty collection if the value is ok.