content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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 org.apache.cassandra.db.rows;
  
  import org.apache.cassandra.db.SerializationHeader;
  import org.apache.cassandra.schema.ColumnMetadata;
  import org.apache.cassandra.utils.SearchIterator;
  import org.apache.cassandra.utils.btree.BTreeSearchIterator;
  
  public class SerializationHelper
  {
      public final SerializationHeader header;
      private BTreeSearchIterator<ColumnMetadata, ColumnMetadata> statics = null;
      private BTreeSearchIterator<ColumnMetadata, ColumnMetadata> regulars = null;
  
      public SerializationHelper(SerializationHeader header)
      {
          this.header = header;
      }
  
      private BTreeSearchIterator<ColumnMetadata, ColumnMetadata> statics()
      {
          if (statics == null)
              statics = header.columns().statics.iterator();
          return statics;
      }
  
      private BTreeSearchIterator<ColumnMetadata, ColumnMetadata> regulars()
      {
          if (regulars == null)
              regulars = header.columns().regulars.iterator();
          return regulars;
      }
  
      public SearchIterator<ColumnMetadata, ColumnMetadata> iterator(boolean isStatic)
      {
          BTreeSearchIterator<ColumnMetadata, ColumnMetadata> iterator = isStatic ? statics() : regulars();
          iterator.rewind();
          return iterator;
      }
  }
  