113 lines · 4.2 KB · Java
RawDownload
/* * Copyright (c) 1998, 2003, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation.  Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code 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 * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package com.sun.tools.jdi; import com.sun.jdi.*;import java.util.*; public class ClassLoaderReferenceImpl extends ObjectReferenceImpl                  implements ClassLoaderReference, VMListener  {     // This is cached only while the VM is suspended    private static class Cache extends ObjectReferenceImpl.Cache {        List<ReferenceType> visibleClasses = null;    }     protected ObjectReferenceImpl.Cache newCache() {        return new Cache();    }     ClassLoaderReferenceImpl(VirtualMachine aVm, long ref) {        super(aVm, ref);        vm.state().addListener(this);    }     protected String description() {        return "ClassLoaderReference " + uniqueID();    }     public List<ReferenceType> definedClasses() {        ArrayList<ReferenceType> definedClasses = new ArrayList<ReferenceType>();        for (ReferenceType type :  vm.allClasses()) {            if (type.isPrepared() &&                equals(type.classLoader())) {                definedClasses.add(type);            }        }        return definedClasses;    }     public List<ReferenceType> visibleClasses() {        List<ReferenceType> classes = null;        try {            Cache local = (Cache)getCache();             if (local != null) {                classes = local.visibleClasses;            }            if (classes == null) {                JDWP.ClassLoaderReference.VisibleClasses.ClassInfo[]                  jdwpClasses = JDWP.ClassLoaderReference.VisibleClasses.                                            process(vm, this).classes;                classes = new ArrayList<ReferenceType>(jdwpClasses.length);                for (int i = 0; i < jdwpClasses.length; ++i) {                    classes.add(vm.referenceType(jdwpClasses[i].typeID,                                                 jdwpClasses[i].refTypeTag));                }                classes = Collections.unmodifiableList(classes);                if (local != null) {                    local.visibleClasses = classes;                    if ((vm.traceFlags & vm.TRACE_OBJREFS) != 0) {                        vm.printTrace(description() +                           " temporarily caching visible classes (count = " +                                      classes.size() + ")");                    }                }            }        } catch (JDWPException exc) {            throw exc.toJDIException();        }        return classes;    }     Type findType(String signature) throws ClassNotLoadedException {        List<ReferenceType> types = visibleClasses();        Iterator iter = types.iterator();        while (iter.hasNext()) {            ReferenceType type = (ReferenceType)iter.next();            if (type.signature().equals(signature)) {                return type;            }        }        JNITypeParser parser = new JNITypeParser(signature);        throw new ClassNotLoadedException(parser.typeName(),                                         "Class " + parser.typeName() + " not loaded");    }     byte typeValueKey() {        return JDWP.Tag.CLASS_LOADER;    }}