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Common Lisp implementation running on the JVM
/*
* RuntimeClass.java
*
* Copyright (C) 2004 Peter Graves
* $Id$
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* As a special exception, the copyright holders of this library give you
* permission to link this library with independent modules to produce an
* executable, regardless of the license terms of these independent
* modules, and to copy and distribute the resulting executable under
* terms of your choice, provided that you also meet, for each linked
* independent module, the terms and conditions of the license of that
* module. An independent module is a module which is not derived from
* or based on this library. If you modify this library, you may extend
* this exception to your version of the library, but you are not
* obligated to do so. If you do not wish to do so, delete this
* exception statement from your version.
*/
package org.armedbear.lisp;
import static org.armedbear.lisp.Lisp.*;
import java.io.File;
import java.util.Map;
import java.util.HashMap;
public class RuntimeClass
{
static Map classes = new HashMap();
private Map methods = new HashMap();
// ### %jnew-runtime-class
// %jnew-runtime-class class-name &rest method-names-and-defs
private static final Primitive _JNEW_RUNTIME_CLASS =
new Primitive("%jnew-runtime-class", PACKAGE_JAVA, false, "class-name &rest method-names-and-defs")
{
@Override
public LispObject execute(LispObject[] args)
{
int length = args.length;
if (length < 3 || length % 2 != 1)
return error(new WrongNumberOfArgumentsException(this));
RuntimeClass rc = new RuntimeClass();
String className = args[0].getStringValue();
for (int i = 1; i < length; i = i+2) {
String methodName = args[i].getStringValue();
rc.addLispMethod(methodName, (Function)args[i+1]);
}
classes.put(className, rc);
return T;
}
};
// ### jredefine-method
// %jredefine-method class-name method-name method-def
private static final Primitive _JREDEFINE_METHOD =
new Primitive("%jredefine-method", PACKAGE_JAVA, false,
"class-name method-name method-def")
{
@Override
public LispObject execute(LispObject className, LispObject methodName,
LispObject methodDef)
{
String cn = className.getStringValue();
String mn = methodName.getStringValue();
Function def = (Function) methodDef;
RuntimeClass rc = null;
if (classes.containsKey(cn)) {
rc = (RuntimeClass) classes.get(cn);
rc.addLispMethod(mn, def);
return T;
}
else {
error(new LispError("undefined Java class: " + cn));
return NIL;
}
}
};
// ### %load-java-class-from-byte-array
private static final Primitive _LOAD_JAVA_CLASS_FROM_BYTE_ARRAY =
new Primitive("%load-java-class-from-byte-array", PACKAGE_JAVA, false,
"classname bytearray")
{
@Override
public LispObject execute(LispObject className, LispObject classBytes)
{
String cn = className.getStringValue();
String pn = cn.substring(0,cn.lastIndexOf('.'));
byte[] cb = (byte[]) classBytes.javaInstance();
try {
JavaClassLoader loader = JavaClassLoader.getPersistentInstance(pn);
Class c = loader.loadClassFromByteArray(cn, cb);
if (c != null) {
return T;
}
}
catch (VerifyError e) {
return error(new LispError("class verification failed: " +
e.getMessage()));
}
catch (LinkageError e) {
return error(new LispError("class could not be linked: " +
e.getMessage()));
}
return error(
new LispError("unable to load ".concat(cn)));
}
};
public static final LispObject evalC(LispObject function,
LispObject args,
Environment env,
LispThread thread)
{
return evalCall(function, args, env, thread);
}
public static RuntimeClass getRuntimeClass(String className) {
return (RuntimeClass) classes.get(className);
}
public Function getLispMethod(String methodName) {
return (Function) methods.get(methodName);
}
void addLispMethod(String methodName, Function def) {
methods.put(methodName, def);
}
public static final LispObject makeLispObject(Object obj)
{
return new JavaObject(obj);
}
public static final Fixnum makeLispObject(byte i)
{
return Fixnum.getInstance(i);
}
public static final Fixnum makeLispObject(short i)
{
return Fixnum.getInstance(i);
}
public static final Fixnum makeLispObject(int i)
{
return Fixnum.getInstance(i);
}
public static final LispInteger makeLispObject(long i)
{
return Bignum.getInstance(i);
}
public static final SingleFloat makeLispObject(float i)
{
return new SingleFloat(i);
}
public static final DoubleFloat makeLispObject(double i)
{
return new DoubleFloat(i);
}
public static final LispCharacter makeLispObject(char i)
{
return LispCharacter.getInstance(i);
}
public static final LispObject makeLispObject(boolean i)
{
return i ? T : NIL;
}
}