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Last change
on this file was
15636,
checked in by Mark Evenson, 15 months ago
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java: provide api for getting and setting classloader
The WITH-CLASSLOADER macro will set the context classloader to that of
the provided CLASSLOADER, or use the default ABCL classloader if
specfied with no argument.
The CLASSLOADER function returns the default classloader or that
associated with a specified JAVA-OBJECT, or the default ABCL
classloader if no JAVA-OBJECT is given
The CONTEXT-CLASSLOADER function returns the context classloader
associated with a JAVA-THREAD, or the currently executing thread if no
JAVA-THREAD is specified. The CONTEXT-CLASSLOADER is a SETF'able
place.
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File size:
1.5 KB
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| 1 | ;;; Copyright (C) 2023 Mark Evenson |
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| 2 | (in-package java) |
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| 3 | (export '(classloader |
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| 4 | context-classloader |
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| 5 | with-classloader)) |
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| 6 | |
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| 7 | (defun classloader (&optional java-object) |
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| 8 | "Without a specified JAVA-OBJECT, return the classloader of the current one |
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| 9 | |
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| 10 | Otherwise return the classloader of the specified JAVA-object." |
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| 11 | (if java-object |
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| 12 | (jcall "getClassLoader" java-object) |
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| 13 | (get-default-classloader))) |
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| 14 | |
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| 15 | (defun context-classloader (&optional java-thread) |
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| 16 | "Without a specified JAVA-THREAD, return the context classloader of the current thread |
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| 17 | |
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| 18 | Otherwise return the context classloader of specified JAVA-THREAD." |
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| 19 | (jcall "getContextClassLoader" |
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| 20 | (if java-thread |
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| 21 | java-thread |
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| 22 | (threads::get-java-thread)))) |
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| 23 | |
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| 24 | (defsetf context-classloader (&optional java-thread) (classloader) |
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| 25 | `(progn |
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| 26 | (jcall "setContextClassLoader" |
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| 27 | (if ,java-thread |
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| 28 | ,java-thread |
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| 29 | (threads::get-java-thread)) |
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| 30 | ,classloader) |
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| 31 | ,classloader)) |
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| 32 | |
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| 33 | (defmacro with-classloader (&optional (classloader) &body body) |
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| 34 | "Call BODY with optional CLASSLOADER argument set as the context classloader |
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| 35 | |
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| 36 | If the CLASSLOADER is not specified, the default classloader is set as |
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| 37 | the context classloader." |
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| 38 | `(let ((original-context (context-classloader))) |
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| 39 | (prog2 |
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| 40 | (setf (context-classloader) |
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| 41 | ,(if classloader |
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| 42 | classloader |
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| 43 | (classloader))) |
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| 44 | ,@body |
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| 45 | (when original-context |
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| 46 | (setf (context-classloader) original-context))))) |
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| 47 | |
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