AbstractFieldValue (MMBase 2.0-SNAPSHOT

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org.mmbase.bridge.util
Class AbstractFieldValue

java.lang.Object
  org.mmbase.bridge.util.AbstractFieldValue

All Implemented Interfaces:: FieldValue

Direct Known Subclasses:: BasicFunctionValue

public abstract class AbstractFieldValue
extends Object
implements FieldValue
extends Object
implements FieldValue

This abstract version of FieldValue only leaves get() to implement. Many other methods ('to<Some type>') are implemented by wrapping methods of Casting.

Since:: MMBase-1.8
Version:: $Id: AbstractFieldValue.java 41943 2010-04-16 17:18:19Z michiel $
Author:: Michiel Meeuwissen

Field Summary
`protected static BridgeException`	`CANNOTCHANGE`
`protected Cloud`	`cloud`
`protected Node`	`node`

Constructor Summary
`protected`	`AbstractFieldValue(Node n, Cloud c)`

Method Summary
`boolean`	`canModify()` Function values cannot be changed
`abstract Object`	`get()` Returns the value as an Object.
`Field`	`getField()` Returns the Field object belonging to this value.
`Node`	`getNode()` Returns the Node to which this value belongs.
`boolean`	`isNull()`
`void`	`set(Object value)` Function values cannot be changed, and all set-functions throw an exception.
`void`	`setBoolean(boolean value)` Function values cannot be changed, and all set-functions throw an exception.
`void`	`setByte(byte[] value)` Function values cannot be changed, and all set-functions throw an exception.
`void`	`setDate(Date value)` Function values cannot be changed, and all set-functions throw an exception.
`void`	`setDouble(double value)` Function values cannot be changed, and all set-functions throw an exception.
`void`	`setFLoat(float value)` Function values cannot be changed, and all set-functions throw an exception.
`void`	`setInt(int value)` Function values cannot be changed, and all set-functions throw an exception.
`void`	`setLong(long value)` Function values cannot be changed, and all set-functions throw an exception.
`void`	`setNode(Node value)` Function values cannot be changed, and all set-functions throw an exception.
`void`	`setObject(Object value)`
`void`	`setString(String value)` Function values cannot be changed, and all set-functions throw an exception.
`void`	`setXML(Document value)` Function values cannot be changed, and all set-functions throw an exception.
`boolean`	`toBoolean()` Returns the value as an boolean (`true` or `false`).
`byte[]`	`toByte()` Returns the value as a byte array.
`Date`	`toDate()` Returns the value as a `java.util.Date` If the value cannot be converted, this method returns `null`
`double`	`toDouble()` Returns the value as a double.
`float`	`toFloat()` Returns the value as a float.
`int`	`toInt()` Returns the value as an int.
`long`	`toLong()` Returns the value as a long.
`Node`	`toNode()` Returns the value as a Node.
`String`	`toString()` Returns the value as a String.
`Document`	`toXML()` Returns the value as a `org.w3c.dom.Document` If the node value is not itself a Document, the method attempts to attempts to convert the String value into an XML.
`Element`	`toXML(Document tree)` Returns the value as a `org.w3c.dom.Element` 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, wait, wait, wait`

Field Detail

CANNOTCHANGE

protected static BridgeException CANNOTCHANGE

node

protected final Node node

cloud

protected final Cloud cloud

Constructor Detail

AbstractFieldValue

protected AbstractFieldValue(Node n,
                             Cloud c)

Method Detail

canModify

public boolean canModify()

Function values cannot be changed

Specified by:: canModify in interface FieldValue

Returns:: false

isNull

public boolean isNull()

Specified by:: isNull in interface FieldValue