com.scriptbasic.utility

Class KlassUtility

java.lang.Object

com.scriptbasic.utility.KlassUtility

public final class KlassUtility
extends Object

Author:

Peter Verhas date June 28, 2012

Method Summary

Methods

Modifier and Type	Method and Description
static Class<?>	forName(String s) Returns a class based on its name just like the method Class.forName(String).
static Class<?>	forNameEx(String s) Returns a class based on its name just like the method Class.forName(String).
static Object	getField(Object object, String fieldName) Get the value of a field of an object and return it.
static void	setField(Object object, String fieldName, Object valueObject)

Methods inherited from class java.lang.Object

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

Method Detail

setField

public static void setField(Object object,
            String fieldName,
            Object valueObject)
                     throws BasicRuntimeException

Parameters:

object -

fieldName -

rightValue -

Throws:

BasicRuntimeException

getField

public static Object getField(Object object,
              String fieldName)
                       throws ExecutionException

Get the value of a field of an object and return it. TODO implement the following algorithm: 1. If there is a getter for the field, use that 2. If there is no getter starting with name 'get' but the field is declared as boolean or Boolean then use the getter that starts with 'is' 3. Use the field.

Current implementation uses the field. TODO implement access as a last resort calling the method INVENT_NAME passing the field name as argument if the class of the object implements the interface INVENT_INTERFACE_NAME. The names should include the word BASIC, or better SCRIPTBASIC. Perhaps ScriptBasicMagicBean or something.

Parameters:

object -

fieldName -

Returns:

Throws:

ExecutionException

forName

public static Class<?> forName(String s)
                        throws ClassNotFoundException

Returns a class based on its name just like the method Class.forName(String). The search for the class is extended. For example if this method is called

 Class<?> klass = KlassUtility.forName("a.b.c.d");
 

the method tries to locate he class a.b.c.d. If it can not locate that it will try to locate a.b.c$d because it may happen that a.b.c is not a package but rather a class itself and the class to be located is an inner class. This continues until the class is located or until the last dot (starting from the end of the class name string) is replaced by the character '$'. In other words the method will try to locate the classes a.b$c$d and a$b$c$d until it finds one.

If this algorithm can not load any class then the exception caught the first time is thrown.

Parameters:

s - the name of the class to be loaded

Returns:

the class finally loaded

Throws:

ClassNotFoundException - the exception thrown by the class loader the first time if the algorithm can not find any class to load.

forNameEx

public static Class<?> forNameEx(String s)
                          throws GenericSyntaxException

Returns a class based on its name just like the method Class.forName(String). If the name of the class is

 byte
 short
 char
 double
 float
 long
 int
 boolean
 

then the method will return the primitive class named. Otherwise it calls forName(String) to load the class.

Parameters:

s -

Returns:

Throws:

GenericSyntaxException