/*

 * Copyright (c) 2016, 2018, 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

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package jdk.jfr.consumer;

import java.util.List;

import jdk.jfr.ValueDescriptor;

import jdk.jfr.internal.Type;

/**

 * Abstract factory for creating specialized types

 */

abstract class ObjectFactory<T> {

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

    final static String TYPE_PREFIX_VERSION_2 = Type.TYPES_PREFIX;

    final static String STACK_FRAME_VERSION_1 = TYPE_PREFIX_VERSION_1 + "StackFrame";

    final static String STACK_FRAME_VERSION_2 = TYPE_PREFIX_VERSION_2 + "StackFrame";

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

        switch (type.getName()) {

        case "java.lang.Thread":

            return RecordedThread.createFactory(type, timeConverter);

        case TYPE_PREFIX_VERSION_1 + "StackFrame":

        case TYPE_PREFIX_VERSION_2 + "StackFrame":

            return RecordedFrame.createFactory(type, timeConverter);

        case TYPE_PREFIX_VERSION_1 + "Method":

        case TYPE_PREFIX_VERSION_2 + "Method":

            return RecordedMethod.createFactory(type, timeConverter);

        case TYPE_PREFIX_VERSION_1 + "ThreadGroup":

        case TYPE_PREFIX_VERSION_2 + "ThreadGroup":

            return RecordedThreadGroup.createFactory(type, timeConverter);

        case TYPE_PREFIX_VERSION_1 + "StackTrace":

        case TYPE_PREFIX_VERSION_2 + "StackTrace":

            return RecordedStackTrace.createFactory(type, timeConverter);

        case TYPE_PREFIX_VERSION_1 + "ClassLoader":

        case TYPE_PREFIX_VERSION_2 + "ClassLoader":

            return RecordedClassLoader.createFactory(type, timeConverter);

        case "java.lang.Class":

            return RecordedClass.createFactory(type, timeConverter);

        }

        return null;

    }

    private final List<ValueDescriptor> valueDescriptors;

    ObjectFactory(Type type) {

        this.valueDescriptors = type.getFields();

    }

    T createObject(long id, Object value) {

        if (value == null) {

            return null;

        }

        if (value instanceof Object[]) {

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

        }

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

    }

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

}