org.mmbase.util
Class Casting

java.lang.Object
  |
  +--org.mmbase.util.Casting

public class Casting

extends java.lang.Object

Constructor Summary

Casting()

Method Summary

static boolean	toBoolean(java.lang.Object b) Get a value of a certain field.
static byte[]	toByte(java.lang.Object obj) Get a binary value of a certain field.
static double	toDouble(java.lang.Object i) Get a value of a certain field.
static float	toFloat(java.lang.Object i) Get a value of a certain field.
static int	toInt(java.lang.Object i) Get a value of a certain field.
static java.lang.Integer	toInteger(java.lang.Object i) Get a value of a certain field.
static long	toLong(java.lang.Object i) Get a value of a certain field.
static MMObjectNode	toNode(java.lang.Object i, MMObjectBuilder parent) Get a value of a certain field.
static java.lang.String	toString(java.lang.Object o) Get a value of a certain field.
static org.w3c.dom.Document	toXML(java.lang.Object o, java.lang.String documentType, java.lang.String conversion) Returns the value of the specified field as a dom.Document If the node value is not itself a Document, the method attempts to attempts to convert the String value into an XML.

Methods inherited from class java.lang.Object

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

Constructor Detail

Casting

public Casting()

Method Detail

toString

public static java.lang.String toString(java.lang.Object o)

Get a value of a certain field. The value is returned as a String. Non-string values are automatically converted to String. 'null' is converted to an empty string.

Parameters:

fieldName - the name of the field who's data to return

Returns:

the field's value as a String

toXML

public static org.w3c.dom.Document toXML(java.lang.Object o,
                                         java.lang.String documentType,
                                         java.lang.String conversion)

Returns the value of the specified field as a dom.Document If the node value is not itself a Document, the method attempts to attempts to convert the String value into an XML. If the value cannot be converted, this method returns null

Parameters:

fieldName - the name of the field to be returned

Returns:

the value of the specified field as a DOM Element or null

Throws:

java.lang.IllegalArgumentException - if the Field is not of type TYPE_XML.

Since:

MMBase-1.6

toByte

public static byte[] toByte(java.lang.Object obj)

Get a binary value of a certain field.

Parameters:

fieldName - the name of the field who's data to return

Returns:

the field's value as an byte [] (binary/blob field)

toNode

public static MMObjectNode toNode(java.lang.Object i,
                                  MMObjectBuilder parent)

Get a value of a certain field. The value is returned as an MMObjectNode. If the field contains an Numeric value, the method tries to obtrain the object with that number. If it is a String, the method tries to obtain the object with that alias. The only other possible values are those created by certain virtual fields. All remaining situations return null.

Parameters:

fieldName - the name of the field who's data to return

Returns:

the field's value as an int

toInt

public static int toInt(java.lang.Object i)

Get a value of a certain field. The value is returned as an int value. Values of non-int, numeric fields are converted if possible. Booelan fields return 0 for false, 1 for true. String fields are parsed to a number, if possible. If a value is an MMObjectNode, it's numberfield is returned. All remaining field values return -1.

Parameters:

fieldName - the name of the field who's data to return

Returns:

the field's value as an int

toBoolean

public static boolean toBoolean(java.lang.Object b)

Get a value of a certain field. The value is returned as an boolean value. If the actual value is numeric, this call returns true if the value is a positive, non-zero, value. In other words, values '0' and '-1' are concidered false. If the value is a string, this call returns true if the value is "true" or "yes" (case-insensitive). In all other cases (including calling byte fields), false is returned. Note that there is currently no basic MMBase boolean type, but some excecuteFunction calls may return a Boolean result.

Parameters:

fieldName - the name of the field who's data to return

Returns:

the field's value as an int

toInteger

public static java.lang.Integer toInteger(java.lang.Object i)

Get a value of a certain field. The value is returned as an Integer value. Values of non-Integer, numeric fields are converted if possible. Boolean fields return 0 for false, 1 for true. String fields are parsed to a number, if possible. All remaining field values return -1.

Parameters:

fieldName - the name of the field who's data to return

Returns:

the field's value as an Integer

toLong

public static long toLong(java.lang.Object i)

Get a value of a certain field. The value is returned as a long value. Values of non-long, numeric fields are converted if possible. Boolean fields return 0 for false, 1 for true. String fields are parsed to a number, if possible. All remaining field values return -1.

Parameters:

fieldName - the name of the field who's data to return

Returns:

the field's value as a long

toFloat

public static float toFloat(java.lang.Object i)

Get a value of a certain field. The value is returned as a float value. Values of non-float, numeric fields are converted if possible. Boolean fields return 0 for false, 1 for true. String fields are parsed to a number, if possible. All remaining field values return -1.

Parameters:

fieldName - the name of the field who's data to return

Returns:

the field's value as a float

toDouble

public static double toDouble(java.lang.Object i)

Get a value of a certain field. The value is returned as a double value. Values of non-double, numeric fields are converted if possible. Boolean fields return 0 for false, 1 for true. String fields are parsed to a number, if possible. All remaining field values return -1.

Parameters:

fieldName - the name of the field who's data to return

Returns:

the field's value as a double