/*

 * Copyright (c) 2016, 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

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

 * questions.

 */

package jdk.jfr.internal.consumer;

import jdk.jfr.consumer.RecordedClass;

import jdk.jfr.consumer.RecordedClassLoader;

import jdk.jfr.consumer.RecordedFrame;

import jdk.jfr.consumer.RecordedMethod;

import jdk.jfr.consumer.RecordedStackTrace;

import jdk.jfr.consumer.RecordedThread;

import jdk.jfr.consumer.RecordedThreadGroup;

import jdk.jfr.internal.Type;

/**

 * Abstract factory for creating specialized types

 */

public abstract class ObjectFactory<T> {

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

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

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

        switch (type.getName()) {

        case "java.lang.Thread":

            return createThreadFactory(type, timeConverter);

        case TYPE_PREFIX_VERSION_1 + "StackFrame":

        case TYPE_PREFIX_VERSION_2 + "StackFrame":

            return createFrameFactory(type, timeConverter);

        case TYPE_PREFIX_VERSION_1 + "Method":

        case TYPE_PREFIX_VERSION_2 + "Method":

            return createMethodFactory(type, timeConverter);

        case TYPE_PREFIX_VERSION_1 + "ThreadGroup":

        case TYPE_PREFIX_VERSION_2 + "ThreadGroup":

            return createdThreadGroupFactory(type, timeConverter);

        case TYPE_PREFIX_VERSION_1 + "StackTrace":

        case TYPE_PREFIX_VERSION_2 + "StackTrace":

            return createStackTraceFactory(type, timeConverter);

        case TYPE_PREFIX_VERSION_1 + "ClassLoader":

        case TYPE_PREFIX_VERSION_2 + "ClassLoader":

            return createClassLoaderFactory(type, timeConverter);

        case "java.lang.Class":

            return createClassFactory(type, timeConverter);

        }

        return null;

    }

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

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

            @Override

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

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

            }

        };

    }

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

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

            @Override

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

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

            }

        };

    }

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

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

            @Override

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

                return PRIVATE_ACCESS.newRecordedStackTrace(objectContext, values);

            }

        };

    }

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

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

            @Override

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

                return PRIVATE_ACCESS.newRecordedThreadGroup(objectContext, values);

            }

        };

    }

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

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

            @Override

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

                return PRIVATE_ACCESS.newRecordedMethod(objectContext, values);

            }

        };

    }

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

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

            @Override

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

                return PRIVATE_ACCESS.newRecordedFrame(objectContext, values);

            }

        };

    }

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

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

            @Override

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

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

            }

        };

    }

    private final ObjectContext objectContext;

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

    }

    T createObject(long id, Object value) {

        if (value == null) {

            return null;

        }

        if (value instanceof Object[]) {

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

        }

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

    }

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

}