/*
    *
    * 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.hadoop.hbase.filter;
  
  import java.util.ArrayList;
  
  import org.apache.hadoop.hbase.util.ByteStringer;
  import org.apache.hadoop.hbase.classification.InterfaceAudience;
  import org.apache.hadoop.hbase.classification.InterfaceStability;
  import org.apache.hadoop.hbase.Cell;
  import org.apache.hadoop.hbase.exceptions.DeserializationException;
  import org.apache.hadoop.hbase.protobuf.generated.FilterProtos;
  import org.apache.hadoop.hbase.util.Bytes;
  
  import com.google.common.base.Preconditions;
  import com.google.protobuf.InvalidProtocolBufferException;
  
  /**
   * A Filter that stops after the given row.  There is no "RowStopFilter" because
   * the Scan spec allows you to specify a stop row.
   *
   * Use this filter to include the stop row, eg: [A,Z].
   */
  @InterfaceAudience.Public
  @InterfaceStability.Stable
  public class InclusiveStopFilter extends FilterBase {
    private byte [] stopRowKey;
    private boolean done = false;
  
    public InclusiveStopFilter(final byte [] stopRowKey) {
      this.stopRowKey = stopRowKey;
    }
  
    public byte[] getStopRowKey() {
      return this.stopRowKey;
    }
  
    @Override
    public ReturnCode filterKeyValue(Cell v) {
      if (done) return ReturnCode.NEXT_ROW;
      return ReturnCode.INCLUDE;
    }
  
    // Override here explicitly as the method in super class FilterBase might do a KeyValue recreate.
    // See HBASE-12068
    @Override
    public Cell transformCell(Cell v) {
      return v;
    }
  
    public boolean filterRowKey(byte[] buffer, int offset, int length) {
      if (buffer == null) {
        //noinspection RedundantIfStatement
        if (this.stopRowKey == null) {
          return true; //filter...
        }
        return false;
      }
      // if stopRowKey is <= buffer, then true, filter row.
      int cmp = Bytes.compareTo(stopRowKey, 0, stopRowKey.length,
        buffer, offset, length);
  
      done = reversed ? cmp > 0 : cmp < 0;
      return done;
    }
  
    public boolean filterAllRemaining() {
      return done;
    }
  
    public static Filter createFilterFromArguments (ArrayList<byte []> filterArguments) {
      Preconditions.checkArgument(filterArguments.size() == 1,
                                  "Expected 1 but got: %s", filterArguments.size());
      byte [] stopRowKey = ParseFilter.removeQuotesFromByteArray(filterArguments.get(0));
      return new InclusiveStopFilter(stopRowKey);
    }
  
    /**
     * @return The filter serialized using pb
     */
    public byte [] toByteArray() {
      FilterProtos.InclusiveStopFilter.Builder builder =
       FilterProtos.InclusiveStopFilter.newBuilder();
     if (this.stopRowKey != null) builder.setStopRowKey(ByteStringer.wrap(this.stopRowKey));
     return builder.build().toByteArray();
   }
 
   /**
    * @param pbBytes A pb serialized {@link InclusiveStopFilter} instance
    * @return An instance of {@link InclusiveStopFilter} made from <code>bytes</code>
    * @throws DeserializationException
    * @see #toByteArray
    */
   public static InclusiveStopFilter parseFrom(final byte [] pbBytes)
   throws DeserializationException {
     FilterProtos.InclusiveStopFilter proto;
     try {
       proto = FilterProtos.InclusiveStopFilter.parseFrom(pbBytes);
     } catch (InvalidProtocolBufferException e) {
       throw new DeserializationException(e);
     }
     return new InclusiveStopFilter(proto.hasStopRowKey()?proto.getStopRowKey().toByteArray():null);
   }
 
   /**
    * @param other
    * @return true if and only if the fields of the filter that are serialized
    * are equal to the corresponding fields in other.  Used for testing.
    */
   boolean areSerializedFieldsEqual(Filter o) {
     if (o == this) return true;
     if (!(o instanceof InclusiveStopFilter)) return false;
 
     InclusiveStopFilter other = (InclusiveStopFilter)o;
     return Bytes.equals(this.getStopRowKey(), other.getStopRowKey());
   }
 
   @Override
   public String toString() {
     return this.getClass().getSimpleName() + " " + Bytes.toStringBinary(this.stopRowKey);
   }
 }