/*

 * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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package jdk.jfr.internal.consumer;

import java.time.ZoneId;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import jdk.jfr.EventType;

import jdk.jfr.ValueDescriptor;

public final class ObjectContext {

    private final Map<ValueDescriptor, ObjectContext> contextLookup;

    private final TimeConverter timeConverter;

    public final EventType eventType;

    public final List<ValueDescriptor> fields;

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

        this.contextLookup = new HashMap<>();

        this.eventType = eventType;

        this.fields = fields;

        this.timeConverter = timeConverter;

    }

    private ObjectContext(ObjectContext parent, ValueDescriptor descriptor) {

        this.eventType = parent.eventType;

        this.contextLookup = parent.contextLookup;

        this.timeConverter = parent.timeConverter;

        this.fields = descriptor.getFields();

    }

    public ObjectContext getInstance(ValueDescriptor descriptor) {

        ObjectContext context = contextLookup.get(descriptor);

        if (context == null) {

            context = new ObjectContext(this, descriptor);

            contextLookup.put(descriptor, context);

        }

        return context;

    }

    public long convertTimestamp(long ticks) {

        return timeConverter.convertTimestamp(ticks);

    }

    public long convertTimespan(long ticks) {

        return timeConverter.convertTimespan(ticks);

    }

    public ZoneId getZoneOffset() {

        return timeConverter.getZoneOffset();

    }

}