Examples of com.sun.jdi.ReferenceType

com.sun.jdi.ReferenceType
sun.com/docs/books/jls/"> Java^TM Language Specification. All ReferenceType objects belong to one of the following subinterfaces: {@link ClassType} for classes,{@link InterfaceType} for interfaces, and{@link ArrayType} for arrays.Note that primitive classes (for example, the {@link ClassObjectReference#reflectedType() reflected type} of{@link java.lang.Integer#TYPE Integer.TYPE}) are represented as ClassType. The VM creates Class objects for all three, so from the VM perspective, each ReferenceType maps to a distinct Class object.
ReferenceTypes can be obtained by querying a particular {@link ObjectReference} for itstype or by getting a list of all reference types from the {@link VirtualMachine}.
ReferenceType provides access to static type information such as methods and fields and provides access to dynamic type information such as the corresponding Class object and the classloader.
Any method on ReferenceType which directly or indirectly takes ReferenceType as an parameter may throw {@link com.sun.jdi.VMDisconnectedException} if the target VM isdisconnected and the {@link com.sun.jdi.event.VMDisconnectEvent} has been or isavailable to be read from the {@link com.sun.jdi.event.EventQueue}.
Any method on ReferenceType which directly or indirectly takes ReferenceType as an parameter may throw {@link com.sun.jdi.VMOutOfMemoryException} if the target VM has run out of memory.
Any method on ReferenceType or which directly or indirectly takes ReferenceType as parameter may throw {@link com.sun.jdi.ObjectCollectedException} if the mirrored type has been unloaded. @see ObjectReference @see ObjectReference#referenceType @see VirtualMachine @see VirtualMachine#allClasses @author Robert Field @author Gordon Hirsch @author James McIlree @since 1.3

                throw new Error("target JVM cannot redefine classes, please force the use of -Xbootclasspath");
            }
            List classList = vm.classesByName(className);
            if (classList.size() == 0)
                throw new Error("Fatal error: Can't find class "+className);
            ReferenceType rt = (ReferenceType)classList.get(0);
            Map map = new HashMap();
            map.put(rt, bytes);
            Method doM = VirtualMachine.class.getMethod("redefineClasses", new Class[]{Map.class});
            doM.invoke(vm, new Object[]{map});
        } catch (NoSuchMethodException e) {

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            String className = ((ClassPrepareEvent) 
                    event).referenceType().name();
            // set the possible deferred line breakpoints
            List<Integer> lineList = deferringLineBreakpoint.get(className);
            if (lineList != null) {
                ReferenceType classType = ((ClassPrepareEvent) 
                        event).referenceType();
                for (Integer line : lineList) {
                    List<Location> locations = classType.locationsOfLine(line);
                    if (!locations.isEmpty()) {
                        Location loc = locations.get(0);
                        BreakpointRequest breakpointRequest = 
                            jdb.eventRequestManager.
                            createBreakpointRequest(loc);
                        breakpointRequest.setSuspendPolicy(
                                EventRequest.SUSPEND_ALL);
                        breakpointRequest.enable();
                        jdb.breakpointRegisterMap.put(
                                loc.toString(), breakpointRequest);
                        System.out.println(
                                String.format("Breakpoint set: " + loc));
                    }
                }
            }
            // set the possible deferred method breakpoints
            List<String> methodStrList = deferringMethodBreakpoint.get(className);
            if (methodStrList != null) {
                ReferenceType classType = ((ClassPrepareEvent) 
                        event).referenceType();
                for (String methodStr : methodStrList) {
                    String[] params = methodStr.split("|");
                    // Generate the target argument type string list
                    String[] argTypeNames;
                    if (params.length > 1) {
                        argTypeNames = params[1].split(",");
                    } else {
                        argTypeNames = new String[0];
                    }
                    // Get all methods of the class
                    List<Method> methodList = classType.methodsByName(params[0]);
                    Method matchedMethod = null;
                    /*
                     * As the jdb command argument doesn't supply the result 
                     * value type, it's impossible to generate a jni signature 
                     * for the specified method. I just have to search...

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        } catch ( CoreException e1 ) {
            logError( e1 );
            return;
        }


        ReferenceType refType = (ReferenceType) debugHandlerClass;
        Method m = (Method) refType.methodsByName( "registerBreakpoint" ).iterator().next();
        List args = new ArrayList();
        IntegerValue lineVal = getVM().mirrorOf( line );
        StringReference nameVal = getVM().mirrorOf( sourceName );
        JDIObjectValue val = (JDIObjectValue) newValue( sourceName );
        ObjectReference realVal = val.getUnderlyingObject();

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        } catch ( CoreException e1 ) {
            logError( e1 );
            return;
        }


        ReferenceType refType = (ReferenceType) debugHandlerClass;
        Method m = (Method) refType.methodsByName( "removeBreakpoint" ).iterator().next();
        List args = new ArrayList();
        IntegerValue lineVal = getVM().mirrorOf( line );
        StringReference nameVal = getVM().mirrorOf( sourceName );
        JDIObjectValue val = (JDIObjectValue) newValue( sourceName );
        ObjectReference realVal = val.getUnderlyingObject();

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            }


            List<IVariable> result = new ArrayList<IVariable>( 0 );


            Method method = getUnderlyingMethod(); // onBreak
            ReferenceType declaringType = method.declaringType(); // org.drools.core.base.mvel.MVELDebugHandler


            try {
                Object var = method.variables().get( 0 );
                LocalVariable v2 = (LocalVariable) var;
                JDILocalVariable frameLocal = new JDILocalVariable( this,

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        Iterator handleriter = getVM().classesByName( "org.drools.core.base.mvel.MVELDebugHandler" ).iterator();
        Object debugHandlerClass = handleriter.next();


        int line = step_over;


        ReferenceType refType = (ReferenceType) debugHandlerClass;
        Method m = (Method) refType.methodsByName( "setOnBreakReturn" ).iterator().next();
        List args = new ArrayList();
        IntegerValue lineVal = getVM().mirrorOf( line );
        //ObjectReference realVal = val.getUnderlyingObject();
        args.add( lineVal );

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            }
            List classList = vm.classesByName(className);
            if (classList.size() == 0) {
                throw new Error("Fatal error: Can't find class " + className);
            }
            ReferenceType rt = (ReferenceType) classList.get(0);
            Map map = new HashMap();
            map.put(rt, bytes);
            Method doM = VirtualMachine.class.getMethod(
                    "redefineClasses", new Class[]{
                        Map.class

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          connected = false;
        } else if (event instanceof ClassPrepareEvent) {
          // watch field on loaded class
          System.out.println("ClassPrepareEvent");
          ClassPrepareEvent classPrepEvent = (ClassPrepareEvent) event;
          ReferenceType refType = classPrepEvent
              .referenceType();
          addFieldWatch(vm, refType);
        } else if (event instanceof ModificationWatchpointEvent) {
          System.out.println("sleep for 500 ms");
          Thread.sleep(500);

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     *
     * @param className the fully-qualified class name.
     * @param classFile the contents of the class file.
     */
    public void reload(String className, byte[] classFile) {
        ReferenceType classtype = toRefType(className);
        Map map = new HashMap();
        map.put(classtype, classFile);
        reload2(map, className);
    }

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     *
     * @param className the fully-qualified class name.
     * @param classFile the contents of the class file.
     */
    public void reload(String className, byte[] classFile) {
        ReferenceType classtype = toRefType(className);
        Map map = new HashMap();
        map.put(classtype, classFile);
        reload2(map, className);
    }

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