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.arrow.flight;
  
  import com.google.protobuf.ByteString;
  import org.apache.arrow.flight.impl.Flight;
  
  /**
   * An opaque object that can be used to filter a list of streams available from a server.
   *
   * <p>This is a POJO wrapper around the protobuf Criteria message.
   */
  public class Criteria {
  
    public static Criteria ALL = new Criteria((byte[]) null);
  
    private final byte[] bytes;
  
    public Criteria(byte[] bytes) {
      this.bytes = bytes;
    }
  
    Criteria(Flight.Criteria criteria) {
      this.bytes = criteria.getExpression().toByteArray();
    }
  
    /** Get the contained filter criteria. */
    public byte[] getExpression() {
      return bytes;
    }
  
    Flight.Criteria asCriteria() {
      Flight.Criteria.Builder b = Flight.Criteria.newBuilder();
      if (bytes != null) {
        b.setExpression(ByteString.copyFrom(bytes));
      }
  
      return b.build();
    }
  }
  