core/src/main/java/org/apache/accumulo/core/iterators/user/ReqVisFilter.java

/*
 * 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
 *
 *   https://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.accumulo.core.iterators.user;

import org.apache.accumulo.core.data.Key;
import org.apache.accumulo.core.data.Value;
import org.apache.accumulo.core.iterators.Filter;
import org.apache.accumulo.core.security.ColumnVisibility;

/**
 * A Filter that matches entries with a non-empty ColumnVisibility.
 */
public class ReqVisFilter extends Filter {

  @Override
  public boolean accept(Key k, Value v) {
    ColumnVisibility vis = new ColumnVisibility(k.getColumnVisibility());
    return vis.getExpression().length > 0;
  }

  @Override
  public IteratorOptions describeOptions() {
    IteratorOptions io = super.describeOptions();
    io.setName("reqvis");
    io.setDescription("ReqVisFilter hides entries without a visibility label");
    return io;
  }
}