/*
 * Copyright 2010-2012 Luca Garulli (l.garulli--at--orientechnologies.com)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.orientechnologies.orient.core.storage.impl.local.paginated;

import java.util.ArrayDeque;
import java.util.Deque;

/**
 * @author Andrey Lomakin <a href="mailto:lomakin.andrey@gmail.com">Andrey Lomakin</a>
 * @since 11/26/13
 */
public class ORecordSerializationContext {
  private static final ThreadLocal<Deque<ORecordSerializationContext>> SERIALIZATION_CONTEXT_STACK = new ThreadLocal<Deque<ORecordSerializationContext>>() {
                                                                                                     @Override
                                                                                                     protected Deque<ORecordSerializationContext> initialValue() {
                                                                                                       return new ArrayDeque<ORecordSerializationContext>();
                                                                                                     }
                                                                                                   };

  public static int getDepth() {
    return ORecordSerializationContext.SERIALIZATION_CONTEXT_STACK.get().size();
  }

  public static ORecordSerializationContext pushContext() {
    final Deque<ORecordSerializationContext> stack = SERIALIZATION_CONTEXT_STACK.get();
    final ORecordSerializationContext context = new ORecordSerializationContext();
    stack.push(context);

    return context;
  }

  public static ORecordSerializationContext getContext() {
    final Deque<ORecordSerializationContext> stack = SERIALIZATION_CONTEXT_STACK.get();
    if (stack.isEmpty())
      return null;

    return stack.peek();
  }

  public static ORecordSerializationContext pullContext() {
    final Deque<ORecordSerializationContext> stack = SERIALIZATION_CONTEXT_STACK.get();
    if (stack.isEmpty())
      throw new IllegalStateException("Can not find current serialization context");

    return stack.poll();
  }

  private final Deque<ORecordSerializationOperation> operations = new ArrayDeque<ORecordSerializationOperation>();

  public void push(ORecordSerializationOperation operation) {
    operations.push(operation);
  }

  void executeOperations(OLocalPaginatedStorage storage) {
    for (ORecordSerializationOperation operation : operations) {
      operation.execute(storage);
    }
  }
}
