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.lang.reflect.Modifier;
  29 import java.util.List;
  30 
  31 import jdk.jfr.ValueDescriptor;
  32 import jdk.jfr.internal.Type;
  33 
  34 /**
  35  * A recorded Java type, such as a class or an interface.
  36  *
  37  * @since 8
  38  */
  39 public final class RecordedClass extends RecordedObject {
  40 
  41     static ObjectFactory<RecordedClass> createFactory(Type type, TimeConverter timeConverter) {
  42         return new ObjectFactory<RecordedClass>(type) {
  43             @Override
  44             RecordedClass createTyped(List<ValueDescriptor> desc, long id, Object[] object) {
  45                 return new RecordedClass(desc, id, object, timeConverter);
  46             }
  47         };
  48     }
  49 
  50     private final long uniqueId;
  51 
  52     // package private
  53     private RecordedClass(List<ValueDescriptor> descriptors, long id, Object[] values, TimeConverter timeConverter) {
  54         super(descriptors, values, timeConverter);
  55         this.uniqueId = id;
  56     }
  57 
  58     /**
  59      * Returns the modifiers of the class.
  60      * <p>
  61      * See {@link java.lang.reflect.Modifier}
  62      *
  63      * @return the modifiers
  64      *
  65      * @see Modifier
  66      */
  67     public int getModifiers() {
  68         return getTyped("modifiers", Integer.class, -1);
  69     }
  70 
  71     /**
  72      * Returns the class loader that defined the class.
  73      * <P>
  74      * If the bootstrap class loader is represented as {@code null} in the Java
  75      * Virtual Machine (JVM), then {@code null} is also the return value of this method.
  76      *
  77      * @return the class loader defining this class, can be {@code null}
  78      */
  79     public RecordedClassLoader getClassLoader() {
  80         return getTyped("classLoader", RecordedClassLoader.class, null);
  81     }
  82 
  83     /**
  84      * Returns the fully qualified name of the class (for example,
  85      * {@code "java.lang.String"}).
  86      *
  87      * @return the class name, not {@code null}
  88      */
  89     public String getName() {
  90         return getTyped("name", String.class, null).replace("/", ".");
  91     }
  92 
  93     /**
  94      * Returns a unique ID for the class.
  95      * <p>
  96      * The ID might not be the same between Java Virtual Machine (JVM) instances.
  97      *
  98      * @return a unique ID
  99      */
 100     public long getId() {
 101         return uniqueId;
 102     }
 103 }