bsh

Class Capabilities

java.lang.Object

bsh.Capabilities

All Implemented Interfaces:

java.util.function.Consumer<java.lang.Boolean>, java.util.function.Supplier<java.lang.Boolean>

public class Capabilities
extends java.lang.Object
implements java.util.function.Supplier<java.lang.Boolean>, java.util.function.Consumer<java.lang.Boolean>

The map of extended features supported by the runtime in which we live.

This class should be independent of all other bsh classes!

Note that tests for class existence here do *not* use the BshClassManager, as it may require other optional class files to be loaded.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Capabilities.Unavailable An attempt was made to use an unavailable capability supported by an optional package.

Method Summary

Modifier and Type	Method and Description
void	accept(java.lang.Boolean t)
static boolean	classExists(java.lang.String name) Use direct Class.forName() to test for the existence of a class.
java.lang.Boolean	get()
static java.lang.Class<?>	getExisting(java.lang.String name)
static boolean	haveAccessibility() If accessibility is enabled determine if the accessibility mechanism exists and if we have the optional bsh package to use it.
static boolean	haveSwing()
static void	setAccessibility(boolean b)

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.function.Consumer

andThen

Method Detail

haveSwing

public static boolean haveSwing()

haveAccessibility

public static boolean haveAccessibility()

If accessibility is enabled determine if the accessibility mechanism exists and if we have the optional bsh package to use it. Note that even if both are true it does not necessarily mean that we have runtime permission to access the fields... Java security has a say in it.

See Also:

Reflect

setAccessibility

public static void setAccessibility(boolean b)

classExists

public static boolean classExists(java.lang.String name)

Use direct Class.forName() to test for the existence of a class. We should not use BshClassManager here because: a) the systems using these tests would probably not load the classes through it anyway. b) bshclassmanager is heavy and touches other class files. this capabilities code must be light enough to be used by any system **including the remote applet**.

getExisting

public static java.lang.Class<?> getExisting(java.lang.String name)

get

public java.lang.Boolean get()

Specified by:

get in interface java.util.function.Supplier<java.lang.Boolean>

accept

public void accept(java.lang.Boolean t)

Specified by:

accept in interface java.util.function.Consumer<java.lang.Boolean>