/**
* Caches a block of code, returning a handle that can be passed to runCachedBlock().
*
* @param id An identifier. If null, a unique identifier is generated
* @param code The code
* @param namespace If true, the namespace will be set
* @return Description of the Return Value
* @exception Exception instances are thrown when various BeanShell errors occur
* @since jEdit 4.1pre1
*/
public BshMethod cacheBlock(String id, String code, boolean namespace) throws Exception {
String name = "__internal_" + id;
// evaluate a method declaration
if (namespace) {
_eval(global, name + "(ns) {\nthis.callstack.set(0,ns);\n" + code + "\n}");
return global.getMethod(name, new Class[] {NameSpace.class});
} else {
_eval(global, name + "() {\n" + code + "\n}");
return global.getMethod(name, new Class[0]);
}
} // }}}
/**
* Description of the Method
*
* @param namespace Description of the Parameter
* @exception UtilEvalError Description of the Exception
*/
private void resetDefaultVariables(NameSpace namespace)
// throws UtilEvalError {
{
try {
namespace.setVariable("reg", factory, false);
} catch (UtilEvalError ex) {
log.error(ex, ex);
}
} // }}}
/** Description of the Method */
public void init() {
global = new NameSpace(new BshClassManager(), "Embedded BeanShell interpreter");
// global.importPackage("org.gjt.sp.util");
global.importPackage("org.twdata.TW1606U.gui");
global.importPackage("org.twdata.TW1606U.signal");
global.importPackage("org.twdata.TW1606U.action");
global.importPackage("org.twdata.TW1606U.tw");
global.importPackage("org.twdata.TW1606U.tw.data");
global.importPackage("org.twdata.TW1606U.data");
global.importPackage("org.twdata.TW1606U.tw.model");
global.importPackage("org.twdata.TW1606U.tw.signal");
global.importPackage("org.werx.framework.bus");
interpForMethods = createInterpreter(global);
} // }}}
/**
* Parse the BSHBlock for for the class definition and generate the class using ClassGenerator.
*/
public static Class generateClassImpl(
String name,
Modifiers modifiers,
Class[] interfaces,
Class superClass,
BSHBlock block,
boolean isInterface,
CallStack callstack,
Interpreter interpreter)
throws EvalError {
// Scripting classes currently requires accessibility
// This can be eliminated with a bit more work.
try {
Capabilities.setAccessibility(true);
} catch (Capabilities.Unavailable e) {
throw new EvalError(
"Defining classes currently requires reflective Accessibility.", block, callstack);
}
NameSpace enclosingNameSpace = callstack.top();
String packageName = enclosingNameSpace.getPackage();
String className =
enclosingNameSpace.isClass ? (enclosingNameSpace.getName() + "$" + name) : name;
String fqClassName = packageName == null ? className : packageName + "." + className;
BshClassManager bcm = interpreter.getClassManager();
// Race condition here...
bcm.definingClass(fqClassName);
// Create the class static namespace
NameSpace classStaticNameSpace = new NameSpace(enclosingNameSpace, className);
classStaticNameSpace.isClass = true;
callstack.push(classStaticNameSpace);
// Evaluate any inner class class definitions in the block
// effectively recursively call this method for contained classes first
block.evalBlock(callstack, interpreter, true /*override*/, ClassNodeFilter.CLASSCLASSES);
// Generate the type for our class
Variable[] variables = getDeclaredVariables(block, callstack, interpreter, packageName);
DelayedEvalBshMethod[] methods = getDeclaredMethods(block, callstack, interpreter, packageName);
ClassGeneratorUtil classGenerator =
new ClassGeneratorUtil(
modifiers,
className,
packageName,
superClass,
interfaces,
variables,
methods,
classStaticNameSpace,
isInterface);
byte[] code = classGenerator.generateClass();
// if debug, write out the class file to debugClasses directory
if (DEBUG_DIR != null)
try {
FileOutputStream out = new FileOutputStream(DEBUG_DIR + '/' + className + ".class");
out.write(code);
out.close();
} catch (IOException e) {
throw new IllegalStateException(
"cannot create file " + DEBUG_DIR + '/' + className + ".class", e);
}
// Define the new class in the classloader
Class genClass = bcm.defineClass(fqClassName, code);
// import the unq name into parent
enclosingNameSpace.importClass(fqClassName.replace('$', '.'));
try {
classStaticNameSpace.setLocalVariable(
ClassGeneratorUtil.BSHINIT, block, false /*strictJava*/);
} catch (UtilEvalError e) {
throw new InterpreterError("unable to init static: " + e);
}
// Give the static space its class static import
// important to do this after all classes are defined
classStaticNameSpace.setClassStatic(genClass);
// evaluate the static portion of the block in the static space
block.evalBlock(callstack, interpreter, true /*override*/, ClassNodeFilter.CLASSSTATIC);
callstack.pop();
if (!genClass.isInterface()) {
// Set the static bsh This callback
String bshStaticFieldName = ClassGeneratorUtil.BSHSTATIC + className;
try {
LHS lhs = Reflect.getLHSStaticField(genClass, bshStaticFieldName);
lhs.assign(classStaticNameSpace.getThis(interpreter), false /*strict*/);
} catch (Exception e) {
throw new InterpreterError("Error in class gen setup: " + e);
}
}
bcm.doneDefiningClass(fqClassName);
return genClass;
}