org.jsimpledb

Class JField

java.lang.Object

org.jsimpledb.JSchemaObject

org.jsimpledb.JField

Direct Known Subclasses:

JComplexField, JCounterField, JSimpleField

public abstract class JField
extends JSchemaObject

Represents a field in a Java model object.

Method Summary

Modifier and Type	Method and Description
Method	getGetter() Get the getter method associated with this field.
abstract Object	getValue(JObject jobj) Get the Java value of this field in the given Java model object.
abstract <R> R	visit(JFieldSwitch<R> target) Apply visitor pattern.

Methods inherited from class org.jsimpledb.JSchemaObject

getJSimpleDB, getName, getStorageId, toString

Methods inherited from class java.lang.Object

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

Method Detail

getGetter

public Method getGetter()

Get the getter method associated with this field.

Returns:

field property getter method, or null if this field is a sub-field of a complex field

getValue

public abstract Object getValue(JObject jobj)

Get the Java value of this field in the given Java model object. Does not alter the schema version of the object.

Parameters:

jobj - object containing this field

Returns:

this field's value in jobj

Throws:

DeletedObjectException - if jobj does not exist in its associated JTransaction

StaleTransactionException - if the JTransaction associated with jobj is no longer usable

IllegalArgumentException - if jobj is null

visit

public abstract <R> R visit(JFieldSwitch<R> target)

Apply visitor pattern.

Type Parameters:

R - visit return type

Parameters:

target - target to invoke

Returns:

value from the method of target corresponding to this instance's type

Throws:

NullPointerException - if target is null