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  * Abstract factory for creating specialized types
  35  */
  36 abstract class ObjectFactory<T> {
  37 
  38     public static ObjectFactory<?> create(Type type, TimeConverter timeConverter) {
  39         switch (type.getName()) {
  40         case "java.lang.Thread":
  41             return RecordedThread.createFactory(type, timeConverter);
  42         case Type.ORACLE_TYPE_PREFIX + "StackFrame":
  43             return RecordedFrame.createFactory(type, timeConverter);
  44         case Type.ORACLE_TYPE_PREFIX + "Method":
  45             return RecordedMethod.createFactory(type, timeConverter);
  46         case Type.ORACLE_TYPE_PREFIX + "ThreadGroup":
  47             return RecordedThreadGroup.createFactory(type, timeConverter);
  48         case Type.ORACLE_TYPE_PREFIX + "StackTrace":
  49             return RecordedStackTrace.createFactory(type, timeConverter);
  50         case Type.ORACLE_TYPE_PREFIX + "ClassLoader":
  51             return RecordedClassLoader.createFactory(type, timeConverter);
  52         case "java.lang.Class":
  53             return RecordedClass.createFactory(type, timeConverter);
  54         }
  55         return null;
  56     }
  57 
  58     private final List<ValueDescriptor> valueDescriptors;
  59 
  60     ObjectFactory(Type type) {
  61         this.valueDescriptors = type.getFields();
  62     }
  63 
  64     T createObject(long id, Object value) {
  65         if (value == null) {
  66             return null;
  67         }
  68         if (value instanceof Object[]) {
  69             return createTyped(valueDescriptors, id, (Object[]) value);
  70         }
  71         throw new InternalError("Object factory must have struct type");
  72     }
  73 
  74     abstract T createTyped(List<ValueDescriptor> valueDescriptors, long id, Object[] values);
  75 }