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.io.sstable;
  
  import java.io.IOError;
  import java.io.IOException;
  
  import org.apache.cassandra.db.DecoratedKey;
  import org.apache.cassandra.db.DeletionTime;
  import org.apache.cassandra.db.RegularAndStaticColumns;
  import org.apache.cassandra.db.UnfilteredValidation;
  import org.apache.cassandra.db.rows.DeserializationHelper;
  import org.apache.cassandra.db.rows.EncodingStats;
  import org.apache.cassandra.db.rows.Row;
  import org.apache.cassandra.db.rows.Unfiltered;
  import org.apache.cassandra.db.rows.UnfilteredRowIterator;
  import org.apache.cassandra.io.sstable.format.SSTableReader;
  import org.apache.cassandra.io.util.FileDataInput;
  import org.apache.cassandra.io.util.RandomAccessReader;
  import org.apache.cassandra.schema.TableMetadata;
  import org.apache.cassandra.utils.ByteBufferUtil;
  
  import static org.apache.cassandra.utils.vint.VIntCoding.VIntOutOfRangeException;
  
  public class SSTableIdentityIterator implements Comparable<SSTableIdentityIterator>, UnfilteredRowIterator
  {
      private final SSTableReader sstable;
      private final DecoratedKey key;
      private final DeletionTime partitionLevelDeletion;
      private final String filename;
  
      protected final SSTableSimpleIterator iterator;
      private final Row staticRow;
      boolean isClosed = false;
  
      public SSTableIdentityIterator(SSTableReader sstable, DecoratedKey key, DeletionTime partitionLevelDeletion,
              String filename, SSTableSimpleIterator iterator) throws IOException
      {
          super();
          this.sstable = sstable;
          this.key = key;
          this.partitionLevelDeletion = partitionLevelDeletion;
          this.filename = filename;
          this.iterator = iterator;
          this.staticRow = iterator.readStaticRow();
      }
  
      public static SSTableIdentityIterator create(SSTableReader sstable, RandomAccessReader file, DecoratedKey key)
      {
          try
          {
              DeletionTime partitionLevelDeletion = DeletionTime.getSerializer(sstable.descriptor.version).deserialize(file);
              if (!partitionLevelDeletion.validate())
                  UnfilteredValidation.handleInvalid(sstable.metadata(), key, sstable, "partitionLevelDeletion="+partitionLevelDeletion.toString());
              DeserializationHelper helper = new DeserializationHelper(sstable.metadata(), sstable.descriptor.version.correspondingMessagingVersion(), DeserializationHelper.Flag.LOCAL);
              SSTableSimpleIterator iterator = SSTableSimpleIterator.create(sstable.metadata(), file, sstable.header, helper, partitionLevelDeletion);
              return new SSTableIdentityIterator(sstable, key, partitionLevelDeletion, file.getPath(), iterator);
          }
          catch (IOException e)
          {
              sstable.markSuspect();
              throw new CorruptSSTableException(e, file.getPath());
          }
          catch (CorruptSSTableException e) // to ensure that we marked the sstable as suspected if CorruptSSTableException is thrown from lower levels
          {
              sstable.markSuspect();
              throw e;
          }
      }
  
      public static SSTableIdentityIterator create(SSTableReader sstable, FileDataInput dfile, long dataPosition, DecoratedKey key, boolean tombstoneOnly)
      {
          try
          {
              dfile.seek(dataPosition);
              ByteBufferUtil.skipShortLength(dfile); // Skip partition key
              DeletionTime partitionLevelDeletion = DeletionTime.getSerializer(sstable.descriptor.version).deserialize(dfile);
              if (!partitionLevelDeletion.validate())
                  UnfilteredValidation.handleInvalid(sstable.metadata(), key, sstable, "partitionLevelDeletion="+partitionLevelDeletion.toString());
  
              DeserializationHelper helper = new DeserializationHelper(sstable.metadata(), sstable.descriptor.version.correspondingMessagingVersion(), DeserializationHelper.Flag.LOCAL);
              SSTableSimpleIterator iterator = tombstoneOnly
                      ? SSTableSimpleIterator.createTombstoneOnly(sstable.metadata(), dfile, sstable.header, helper, partitionLevelDeletion)
                      : SSTableSimpleIterator.create(sstable.metadata(), dfile, sstable.header, helper, partitionLevelDeletion);
              return new SSTableIdentityIterator(sstable, key, partitionLevelDeletion, dfile.getPath(), iterator);
          }
          catch (IOException e)
          {
              sstable.markSuspect();
              throw new CorruptSSTableException(e, dfile.getPath());
          }
          catch (CorruptSSTableException e) // to ensure that we marked the sstable as suspected if CorruptSSTableException is thrown from lower levels
          {
              sstable.markSuspect();
              throw e;
          }
      }
  
      public static SSTableIdentityIterator create(SSTableReader sstable, FileDataInput dfile, boolean tombstoneOnly)
      {
          try
          {
              DecoratedKey key = sstable.decorateKey(ByteBufferUtil.readWithShortLength(dfile));
              DeletionTime partitionLevelDeletion = DeletionTime.getSerializer(sstable.descriptor.version).deserialize(dfile);
              if (!partitionLevelDeletion.validate())
                  UnfilteredValidation.handleInvalid(sstable.metadata(), key, sstable, "partitionLevelDeletion="+partitionLevelDeletion.toString());
  
              DeserializationHelper helper = new DeserializationHelper(sstable.metadata(), sstable.descriptor.version.correspondingMessagingVersion(), DeserializationHelper.Flag.LOCAL);
              SSTableSimpleIterator iterator = tombstoneOnly
                                               ? SSTableSimpleIterator.createTombstoneOnly(sstable.metadata(), dfile, sstable.header, helper, partitionLevelDeletion)
                                               : SSTableSimpleIterator.create(sstable.metadata(), dfile, sstable.header, helper, partitionLevelDeletion);
              return new SSTableIdentityIterator(sstable, key, partitionLevelDeletion, dfile.getPath(), iterator);
          }
          catch (IOException e)
          {
              sstable.markSuspect();
              throw new CorruptSSTableException(e, dfile.getPath());
          }
          catch (CorruptSSTableException e) // to ensure that we marked the sstable as suspected if CorruptSSTableException is thrown from lower levels
          {
              sstable.markSuspect();
              throw e;
          }
      }
  
      public TableMetadata metadata()
      {
          return iterator.metadata;
      }
  
      public RegularAndStaticColumns columns()
      {
          return metadata().regularAndStaticColumns();
      }
  
      public boolean isReverseOrder()
      {
          return false;
      }
  
      public DecoratedKey partitionKey()
      {
          return key;
      }
  
      public DeletionTime partitionLevelDeletion()
      {
          return partitionLevelDeletion;
      }
  
      public Row staticRow()
      {
          return staticRow;
      }
  
      public boolean hasNext()
      {
          try
          {
              return iterator.hasNext();
          }
          catch (IndexOutOfBoundsException | VIntOutOfRangeException | AssertionError e)
          {
              sstable.markSuspect();
              throw new CorruptSSTableException(e, filename);
          }
          catch (CorruptSSTableException e) // to ensure that we marked the sstable as suspected if CorruptSSTableException is thrown from lower levels
          {
              sstable.markSuspect();
              throw e;
          }
          catch (IOError e)
          {
              if (e.getCause() instanceof IOException)
              {
                  sstable.markSuspect();
                  throw new CorruptSSTableException((Exception)e.getCause(), filename);
              }
              else
              {
                  throw e;
              }
          }
      }
  
      public Unfiltered next()
      {
          try
          {
              if (isClosed)
                  throw new IllegalStateException("Iterator used after closing.");
  
              return doCompute();
          }
          catch (IndexOutOfBoundsException | VIntOutOfRangeException | AssertionError e)
          {
              sstable.markSuspect();
              throw new CorruptSSTableException(e, filename);
          }
          catch (CorruptSSTableException e) // to ensure that we marked the sstable as suspected if CorruptSSTableException is thrown from lower levels
          {
              sstable.markSuspect();
              throw e;
          }
          catch (IOError e)
          {
              if (e.getCause() instanceof IOException)
              {
                  sstable.markSuspect();
                  throw new CorruptSSTableException((Exception)e.getCause(), filename);
              }
              else
              {
                  throw e;
              }
          }
      }
  
      protected Unfiltered doCompute()
      {
          Unfiltered unfiltered = iterator.next();
          UnfilteredValidation.maybeValidateUnfiltered(unfiltered, metadata(), key, sstable);
          return unfiltered;
      }
  
      public void close()
      {
          // creator is responsible for closing file when finished
          isClosed = true;
      }
  
      public boolean isClosed()
      {
          return isClosed;
      }
  
      /**
       * Called to advance to the next partition and make sure that we process all outstanding rows if user did not
       * do so. Unlike next() and hasNext(), this can and will be called after the iterator is closed.
       */
      public void exhaust()
      {
          try
          {
              while (iterator.hasNext())
                  iterator.next();
          }
          catch (IndexOutOfBoundsException | VIntOutOfRangeException | AssertionError e)
          {
              sstable.markSuspect();
              throw new CorruptSSTableException(e, filename);
          }
          catch (CorruptSSTableException e) // to ensure that we marked the sstable as suspected if CorruptSSTableException is thrown from lower levels
          {
              sstable.markSuspect();
              throw e;
          }
          catch (IOError e)
          {
              if (e.getCause() instanceof IOException)
              {
                  sstable.markSuspect();
                  throw new CorruptSSTableException((Exception)e.getCause(), filename);
              }
              else
              {
                  throw e;
              }
          }
      }
  
      public String getPath()
      {
          return filename;
      }
  
      public EncodingStats stats()
      {
          // We could return sstable.header.stats(), but this may not be as accurate than the actual sstable stats (see
          // SerializationHeader.make() for details) so we use the latter instead.
          return sstable.stats();
      }
  
      public int compareTo(SSTableIdentityIterator o)
      {
          return key.compareTo(o.key);
      }
  }
  