org.apache.accumulo.shell.commands.EGrepCommand Maven / Gradle / Ivy

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/*
 * 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.accumulo.shell.commands;

import java.io.IOException;

import org.apache.accumulo.core.client.BatchScanner;
import org.apache.accumulo.core.client.IteratorSetting;
import org.apache.accumulo.core.iterators.user.RegExFilter;
import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.Option;
import org.apache.commons.cli.Options;

public class EGrepCommand extends GrepCommand {

  private Option matchSubstringOption;

  @Override
  protected void setUpIterator(final int prio, final String name, final String term, final BatchScanner scanner, CommandLine cl) throws IOException {
    if (prio < 0) {
      throw new IllegalArgumentException("Priority < 0 " + prio);
    }
    final IteratorSetting si = new IteratorSetting(prio, name, RegExFilter.class);
    RegExFilter.setRegexs(si, term, term, term, term, true, cl.hasOption(matchSubstringOption.getOpt()));
    scanner.addScanIterator(si);
  }

  @Override
  public String description() {
    return "searches each row, column family, column qualifier and value, in parallel, on the server side "
        + "(using a java Matcher, so put .* before and after your term if you're not matching the whole element)";
  }

  @Override
  public String usage() {
    return getName() + " { }";
  }

  @Override
  public Options getOptions() {
    final Options opts = super.getOptions();
    matchSubstringOption = new Option("g", "global", false, "forces the use of the find() expression matcher, causing substring matches to return true");
    opts.addOption(matchSubstringOption);
    return opts;
  }
}