1 /*

     2  * Copyright (c) 2016, 2018, 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     final static String TYPE_PREFIX_VERSION_1 = "com.oracle.jfr.types.";

    39     final static String TYPE_PREFIX_VERSION_2 = Type.TYPES_PREFIX;

    40     final static String STACK_FRAME_VERSION_1 = TYPE_PREFIX_VERSION_1 + "StackFrame";

    41     final static String STACK_FRAME_VERSION_2 = TYPE_PREFIX_VERSION_2 + "StackFrame";

    42 

    43     public static ObjectFactory<?> create(Type type, TimeConverter timeConverter) {

    44         switch (type.getName()) {

    45         case "java.lang.Thread":

    46             return RecordedThread.createFactory(type, timeConverter);

    47         case TYPE_PREFIX_VERSION_1 + "StackFrame":

    48         case TYPE_PREFIX_VERSION_2 + "StackFrame":

    49             return RecordedFrame.createFactory(type, timeConverter);

    50         case TYPE_PREFIX_VERSION_1 + "Method":

    51         case TYPE_PREFIX_VERSION_2 + "Method":

    52             return RecordedMethod.createFactory(type, timeConverter);

    53         case TYPE_PREFIX_VERSION_1 + "ThreadGroup":

    54         case TYPE_PREFIX_VERSION_2 + "ThreadGroup":

    55             return RecordedThreadGroup.createFactory(type, timeConverter);

    56         case TYPE_PREFIX_VERSION_1 + "StackTrace":

    57         case TYPE_PREFIX_VERSION_2 + "StackTrace":

    58             return RecordedStackTrace.createFactory(type, timeConverter);

    59         case TYPE_PREFIX_VERSION_1 + "ClassLoader":

    60         case TYPE_PREFIX_VERSION_2 + "ClassLoader":

    61             return RecordedClassLoader.createFactory(type, timeConverter);

    62         case "java.lang.Class":

    63             return RecordedClass.createFactory(type, timeConverter);

    64         }

    65         return null;

    66     }

    67 

    68     private final List<ValueDescriptor> valueDescriptors;

    69 

    70     ObjectFactory(Type type) {

    71         this.valueDescriptors = type.getFields();

    72     }

    73 

    74     T createObject(long id, Object value) {

    75         if (value == null) {

    76             return null;

    77         }

    78         if (value instanceof Object[]) {

    79             return createTyped(valueDescriptors, id, (Object[]) value);

    80         }

    81         throw new InternalError("Object factory must have struct type");

    82     }

    83 

    84     abstract T createTyped(List<ValueDescriptor> valueDescriptors, long id, Object[] values);

    85 }