1 /*
   2  * Copyright (c) 2016, 2019, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package jdk.jfr.consumer;
  27 
  28 import java.util.List;
  29 
  30 import jdk.jfr.ValueDescriptor;
  31 import jdk.jfr.internal.Type;
  32 
  33 /**
  34  * A recorded Java class loader.
  35  *
  36  * @since 9
  37  */
  38 public final class RecordedClassLoader extends RecordedObject {
  39 
  40     static ObjectFactory<RecordedClassLoader> createFactory(Type type, TimeConverter timeConverter) {
  41         return new ObjectFactory<RecordedClassLoader>(type) {
  42             @Override
  43             RecordedClassLoader createTyped(List<ValueDescriptor> desc, long id, Object[] object) {
  44                 return new RecordedClassLoader(desc, id, object, timeConverter);
  45             }
  46         };
  47     }
  48 
  49     private final long uniqueId;
  50 
  51     // package private
  52     private RecordedClassLoader(List<ValueDescriptor> descriptors, long id, Object[] values, TimeConverter timeConverter) {
  53         super(descriptors, values, timeConverter);
  54         this.uniqueId = id;
  55     }
  56 
  57     /**
  58      * Returns the class of the class loader.
  59      * <P>
  60      * If the bootstrap class loader is represented as {@code null} in the Java
  61      * Virtual Machine (JVM), then {@code null} is also the return value of this
  62      * method.
  63      *
  64      * @return class of the class loader, can be {@code null}
  65      */
  66     public RecordedClass getType() {
  67         return getTyped("type", RecordedClass.class, null);
  68     }
  69 
  70     /**
  71      * Returns the name of the class loader (for example, "boot", "platform", and
  72      * "app").
  73      *
  74      * @return the class loader name, can be {@code null}
  75      */
  76     public String getName() {
  77         return getTyped("name", String.class, null);
  78     }
  79 
  80     /**
  81      * Returns a unique ID for the class loader.
  82      * <p>
  83      * The ID might not be the same between Java Virtual Machine (JVM) instances.
  84      *
  85      * @return a unique ID
  86      */
  87     public long getId() {
  88         return uniqueId;
  89     }
  90 }