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silk
Class Procedure
java.lang.Objectsilk.Procedure
- All Implemented Interfaces:
- java.lang.Runnable
- Direct Known Subclasses:
- Closure, Continuation, Generic, JavaConstructor, JavaField, JavaMethod, Primitive, RawConstructor, RawMethod
- public abstract class Procedure
- extends java.lang.Object
- implements java.lang.Runnable
- extends java.lang.Object
Abstract superclass of Procedures. Procedures of no arguments, called "thunks", implement the Runnable interface. To invoke a Procedure from Java, use apply(Pair).
| Field Summary | |
(package private) int |
maxArgs
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(package private) int |
minArgs
|
(package private) java.lang.String |
name
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| Constructor Summary | |
Procedure()
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Procedure(int minArgs,
int maxArgs)
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| Method Summary | |
abstract java.lang.Object |
apply(java.lang.Object[] args)
Apply the procedure to an argument list, which is represented as a parameter-oriented array. |
java.lang.Object |
apply(Pair args)
Convert an argument list into an argument array, and call apply on that. |
java.lang.Object[] |
makeArgArray(java.lang.Object[] code,
Environment env)
Take the code that represents a call, evaluate arguments in the calling environment and put results into an argument array. |
java.lang.Object[] |
makeArgArray(Pair args)
Convert a list of arguments into an array expected by the procedure. |
int |
nParms()
How many parameters does this procedure have. |
void |
run()
This method will be called by whoever wishes to run your class implementing Runnable. |
java.lang.Object |
setName(java.lang.Object name)
If the procedure has not yet been named, name it. |
static java.lang.Object |
throwObject(java.lang.Object E)
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static java.lang.Object |
throwRuntimeException(java.lang.RuntimeException E)
provide scheme access to the exception throwing |
java.lang.String |
toString()
Convert this Object to a human-readable String. |
protected java.lang.String |
toStringArgs()
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static java.lang.Object |
tryCatch(java.lang.Object E,
java.lang.Object F)
provide scheme access to the "try/catch" expression of Java |
static java.lang.Object |
tryFinally(java.lang.Object e,
java.lang.Object f)
Provide scheme access to finally - unwind-protect. |
| Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
| Field Detail |
name
java.lang.String name
minArgs
int minArgs
maxArgs
int maxArgs
| Constructor Detail |
Procedure
public Procedure()
Procedure
public Procedure(int minArgs,
int maxArgs)
| Method Detail |
setName
public java.lang.Object setName(java.lang.Object name)
- If the procedure has not yet been named, name it.
The idea is if I do (define (id x) x) and then
(define default-proc id), then the procedure is called "id".
nParms
public int nParms()
- How many parameters does this procedure have. This is different than the
number of arguments it expects. For example, list expects any
number of arguments, but it has only one parameter.
toStringArgs
protected java.lang.String toStringArgs()
toString
public java.lang.String toString()
- Description copied from class:
java.lang.Object - Convert this Object to a human-readable String.
There are no limits placed on how long this String
should be or what it should contain. We suggest you
make it as intuitive as possible to be able to place
it into System.out.println() 55
and such.
It is typical, but not required, to ensure that this method never completes abruptly with a java.lang.RuntimeException.
This method will be called when performing string concatenation with this object. If the result is
null, string concatenation will instead use"null".The default implementation returns
getClass().getName() + "@" + Integer.toHexString(hashCode()).
run
public void run()
- Description copied from interface:
java.lang.Runnable - This method will be called by whoever wishes to run your class
implementing Runnable. Note that there are no restrictions on what
you are allowed to do in the run method, except that you cannot
throw a checked exception.
- Specified by:
runin interfacejava.lang.Runnable
apply
public abstract java.lang.Object apply(java.lang.Object[] args)
- Apply the procedure to an argument list, which is represented as a
parameter-oriented array. That is, if the procedure p has the parameter
list (x y . z) and the call is (p 1 2 3 4) then
args will be the array {1, 2, (3 4)}.
apply
public java.lang.Object apply(Pair args)
- Convert an argument list into an argument array, and call apply
on that.
makeArgArray
public final java.lang.Object[] makeArgArray(Pair args)
- Convert a list of arguments into an array expected by the procedure.
(See apply for an explanation of what is expected.)
makeArgArray
public java.lang.Object[] makeArgArray(java.lang.Object[] code, Environment env)
- Take the code that represents a call, evaluate arguments in the calling
environment and put results into an argument array. Note that
code[0] is the procedure, not an argument. For example,
(p 1 2 3 (+ 2 2)) turns into the code {p, 1, 2, 3, {+, 2, 2}},
and if p has the parameter list (x y . z) then
p.makeArgArray(code, env) would return {1, 2, (3 4)}.
tryCatch
public static java.lang.Object tryCatch(java.lang.Object E, java.lang.Object F)
- provide scheme access to the "try/catch" expression of Java
tryFinally
public static java.lang.Object tryFinally(java.lang.Object e, java.lang.Object f)
- Provide scheme access to finally - unwind-protect.
throwRuntimeException
public static java.lang.Object throwRuntimeException(java.lang.RuntimeException E) throws java.lang.RuntimeException
- provide scheme access to the exception throwing
throwObject
public static java.lang.Object throwObject(java.lang.Object E) throws java.lang.Throwable
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SUMMARY: JAVADOC | SOURCE | DOWNLOAD | NESTED | FIELD | CONSTR | METHOD |
DETAIL: FIELD | CONSTR | METHOD | ||||||||