org.mmbase.core.util

Class Fields

java.lang.Object

org.mmbase.core.util.Fields

public class Fields
extends Object

Since:

MMBase-1.8

Version:

$Id$

Field Summary

Fields

Modifier and Type	Field and Description
static int	STATE_MAXVALUE
static int	STATE_MINVALUE
static int	TYPE_MAXVALUE
static int	TYPE_MINVALUE

Constructor Summary

Constructors

Constructor and Description
Fields()

Method Summary

Modifier and Type	Method and Description
static int	classToType(Class classType) Determines the MMBase type of a specified class.
static CoreField	createField(String name, int type, int state, DataType dataType) Defaulting version of createField(String, int int, int, DataType) (no list item type, because it is nearly always irrelevant).
static CoreField	createField(String name, int type, int listItemType, int state, DataType dataType) Returns an instance of a CoreField based on the type and state.
static CoreField	createSystemField(String name, int type) Returns an instance of a CoreField based on the type, with state 'SYSTEM', and a basic datatype assigned.
static int	getState(String state) Provide an id for the specified mmbase state description.
static String	getStateDescription(int state) Provide a description for the specified state.
static int	getType(String type) Provide an id for the specified mmbase type description
static String	getTypeDescription(int type) Provide a description for the specified type.
static void	sort(List<? extends Field> fields, int order)
static Class	typeToClass(int type) Determines the class for a specified MMBase base type.

Methods inherited from class java.lang.Object

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

Field Detail

STATE_MINVALUE

public static final int STATE_MINVALUE

See Also:

Constant Field Values

STATE_MAXVALUE

public static final int STATE_MAXVALUE

See Also:

Constant Field Values

TYPE_MINVALUE

public static final int TYPE_MINVALUE

See Also:

Constant Field Values

TYPE_MAXVALUE

public static final int TYPE_MAXVALUE

Constructor Detail

Fields

public Fields()

Method Detail

createSystemField

public static CoreField createSystemField(String name,
                                          int type)

Returns an instance of a CoreField based on the type, with state 'SYSTEM', and a basic datatype assigned.

Parameters:

name - The name of the field

type - the MMBase basic field type, one of the Field TYPE constants. Specifying Field.TYPE_LIST, may give unpredictable results.

createField

public static CoreField createField(String name,
                                    int type,
                                    int listItemType,
                                    int state,
                                    DataType dataType)

Returns an instance of a CoreField based on the type and state.

Parameters:

name - The name of the field

type - the MMBase basic field type, one of the Field TYPE constants.

listItemType - the MMBase type for items of a list (if type is Field.TYPE_LIST).

state - the MMBase field state, one of the Field STATE constants.

dataType - the unfinished dataType to use for validating the field data. If null, a default datatype is assigned

createField

public static CoreField createField(String name,
                                    int type,
                                    int state,
                                    DataType dataType)

Defaulting version of createField(String, int int, int, DataType) (no list item type, because it is nearly always irrelevant).

Since:

MMBase-1.9

getTypeDescription

public static String getTypeDescription(int type)

Provide a description for the specified type. Useful for debugging, errors or presenting GUI info.

Parameters:

type - the type to get the description of

Returns:

the description of the type.

getStateDescription

public static String getStateDescription(int state)

Provide a description for the specified state. Useful for debugging, errors or presenting GUI info.

Parameters:

state - the state to get the description of

Returns:

the description of the state.

getState

public static int getState(String state)

Provide an id for the specified mmbase state description.

Parameters:

state - the state description to get the id of

Returns:

the id of the state.

getType

public static int getType(String type)

Provide an id for the specified mmbase type description

Parameters:

type - the type description to get the id of

Returns:

the id of the type.

classToType

public static int classToType(Class classType)

Determines the MMBase type of a specified class. The MMBase base type is sue by the storage layer to determine how to store a field. If the base type cannot be determined from the class, the value returned is Field.TYPE_UNKNOWN.

Parameters:

classType -

Returns:

an MMBase base type constant

typeToClass

public static Class typeToClass(int type)

Determines the class for a specified MMBase base type. If the value is Field.TYPE_UNKNOWN), the method returns null.

Parameters:

type -

Returns:

an MMBase base type constant

sort

public static void sort(List<? extends Field> fields,
                        int order)