1 /*

     2  * Copyright (c) 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 java.time.ZoneId;

    29 import java.util.HashMap;

    30 import java.util.List;

    31 import java.util.Map;

    32 

    33 import jdk.jfr.EventType;

    34 import jdk.jfr.ValueDescriptor;

    35 

    36 public final class ObjectContext {

    37     private final Map<ValueDescriptor, ObjectContext> contextLookup;

    38     private final TimeConverter timeConverter;

    39 

    40     public final EventType eventType;

    41     public final List<ValueDescriptor> fields;

    42 

    43     ObjectContext(EventType eventType, List<ValueDescriptor> fields, TimeConverter timeConverter) {

    44         this.contextLookup = new HashMap<>();

    45         this.eventType = eventType;

    46         this.fields = fields;

    47         this.timeConverter = timeConverter;

    48     }

    49 

    50     private ObjectContext(ObjectContext parent, ValueDescriptor descriptor) {

    51         this.eventType = parent.eventType;

    52         this.contextLookup = parent.contextLookup;

    53         this.timeConverter = parent.timeConverter;

    54         this.fields = descriptor.getFields();

    55     }

    56 

    57     public ObjectContext getInstance(ValueDescriptor descriptor) {

    58         ObjectContext context = contextLookup.get(descriptor);

    59         if (context == null) {

    60             context = new ObjectContext(this, descriptor);

    61             contextLookup.put(descriptor, context);

    62         }

    63         return context;

    64     }

    65 

    66     public long convertTimestamp(long ticks) {

    67         return timeConverter.convertTimestamp(ticks);

    68     }

    69 

    70     public long convertTimespan(long ticks) {

    71         return timeConverter.convertTimespan(ticks);

    72     }

    73 

    74     public ZoneId getZoneOffset() {

    75         return timeConverter.getZoneOffset();

    76     }

    77 }