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.internal.consumer;

    27 

    28 import jdk.jfr.consumer.RecordedClass;

    29 import jdk.jfr.consumer.RecordedClassLoader;

    30 import jdk.jfr.consumer.RecordedFrame;

    31 import jdk.jfr.consumer.RecordedMethod;

    32 import jdk.jfr.consumer.RecordedStackTrace;

    33 import jdk.jfr.consumer.RecordedThread;

    34 import jdk.jfr.consumer.RecordedThreadGroup;

    35 import jdk.jfr.internal.Type;

    36 

    37 /**

    38  * Abstract factory for creating specialized types

    39  */

    40 public abstract class ObjectFactory<T> {

    41     private static final JdkJfrConsumer PRIVATE_ACCESS = JdkJfrConsumer.instance();

    42 

    43     private final static String TYPE_PREFIX_VERSION_1 = "com.oracle.jfr.types.";

    44     private final static String TYPE_PREFIX_VERSION_2 = Type.TYPES_PREFIX;

    45     public final static String STACK_FRAME_VERSION_1 = TYPE_PREFIX_VERSION_1 + "StackFrame";

    46     public final static String STACK_FRAME_VERSION_2 = TYPE_PREFIX_VERSION_2 + "StackFrame";

    47 

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

    49         switch (type.getName()) {

    50         case "java.lang.Thread":

    51             return createThreadFactory(type, timeConverter);

    52         case TYPE_PREFIX_VERSION_1 + "StackFrame":

    53         case TYPE_PREFIX_VERSION_2 + "StackFrame":

    54             return createFrameFactory(type, timeConverter);

    55         case TYPE_PREFIX_VERSION_1 + "Method":

    56         case TYPE_PREFIX_VERSION_2 + "Method":

    57             return createMethodFactory(type, timeConverter);

    58         case TYPE_PREFIX_VERSION_1 + "ThreadGroup":

    59         case TYPE_PREFIX_VERSION_2 + "ThreadGroup":

    60             return createdThreadGroupFactory(type, timeConverter);

    61         case TYPE_PREFIX_VERSION_1 + "StackTrace":

    62         case TYPE_PREFIX_VERSION_2 + "StackTrace":

    63             return createStackTraceFactory(type, timeConverter);

    64         case TYPE_PREFIX_VERSION_1 + "ClassLoader":

    65         case TYPE_PREFIX_VERSION_2 + "ClassLoader":

    66             return createClassLoaderFactory(type, timeConverter);

    67         case "java.lang.Class":

    68             return createClassFactory(type, timeConverter);

    69         }

    70         return null;

    71     }

    72 

    73     private static ObjectFactory<RecordedClass> createClassFactory(Type type, TimeConverter timeConverter) {

    74         return new ObjectFactory<RecordedClass>(type, timeConverter) {

    75             @Override

    76             RecordedClass createTyped(ObjectContext objectContext, long id, Object[] values) {

    77                 return PRIVATE_ACCESS.newRecordedClass(objectContext, id, values);

    78             }

    79         };

    80     }

    81 

    82     private static ObjectFactory<?> createClassLoaderFactory(Type type, TimeConverter timeConverter) {

    83         return new ObjectFactory<RecordedClassLoader>(type, timeConverter) {

    84             @Override

    85             RecordedClassLoader createTyped(ObjectContext objectContext, long id, Object[] values) {

    86                 return PRIVATE_ACCESS.newRecordedClassLoader(objectContext, id, values);

    87             }

    88         };

    89     }

    90 

    91     private static ObjectFactory<RecordedStackTrace> createStackTraceFactory(Type type, TimeConverter timeConverter) {

    92         return new ObjectFactory<RecordedStackTrace>(type, timeConverter) {

    93             @Override

    94             RecordedStackTrace createTyped(ObjectContext objectContext, long id, Object[] values) {

    95                 return PRIVATE_ACCESS.newRecordedStackTrace(objectContext, values);

    96             }

    97         };

    98     }

    99 

   100     private static ObjectFactory<RecordedThreadGroup> createdThreadGroupFactory(Type type, TimeConverter timeConverter) {

   101         return new ObjectFactory<RecordedThreadGroup>(type, timeConverter) {

   102             @Override

   103             RecordedThreadGroup createTyped(ObjectContext objectContext, long id, Object[] values) {

   104                 return PRIVATE_ACCESS.newRecordedThreadGroup(objectContext, values);

   105             }

   106         };

   107     }

   108 

   109     private static ObjectFactory<RecordedMethod> createMethodFactory(Type type, TimeConverter timeConverter) {

   110         return new ObjectFactory<RecordedMethod>(type, timeConverter) {

   111             @Override

   112             RecordedMethod createTyped(ObjectContext objectContext, long id, Object[] values) {

   113                 return PRIVATE_ACCESS.newRecordedMethod(objectContext, values);

   114             }

   115         };

   116     }

   117 

   118     private static ObjectFactory<RecordedFrame> createFrameFactory(Type type, TimeConverter timeConverter) {

   119         return new ObjectFactory<RecordedFrame>(type, timeConverter) {

   120             @Override

   121             RecordedFrame createTyped(ObjectContext objectContext, long id, Object[] values) {

   122                 return PRIVATE_ACCESS.newRecordedFrame(objectContext, values);

   123             }

   124         };

   125     }

   126 

   127     private static ObjectFactory<RecordedThread> createThreadFactory(Type type, TimeConverter timeConverter) {

   128         return new ObjectFactory<RecordedThread>(type, timeConverter) {

   129             @Override

   130             RecordedThread createTyped(ObjectContext objectContext, long id, Object[] values) {

   131                 return PRIVATE_ACCESS.newRecordedThread(objectContext, id, values);

   132             }

   133         };

   134     }

   135 

   136     private final ObjectContext objectContext;

   137 

   138     private ObjectFactory(Type type, TimeConverter timeConverter) {

   139         this.objectContext = new ObjectContext(null, type.getFields(), timeConverter);

   140     }

   141 

   142     T createObject(long id, Object value) {

   143         if (value == null) {

   144             return null;

   145         }

   146         if (value instanceof Object[]) {

   147             return createTyped(objectContext, id, (Object[]) value);

   148         }

   149         throw new InternalError("Object factory must have struct type. Type was " + value.getClass().getName());

   150     }

   151 

   152     abstract T createTyped(ObjectContext objectContextm, long id, Object[] values);

   153 }