GlobUtil.java

/*
 * Copyright (c) 2016 ingenieux Labs
 *
 * Licensed 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 br.com.ingenieux.mojo.aws.util;

import java.util.regex.Pattern;

public class GlobUtil {
  public static Pattern asPattern(String x) {
    if (hasWildcards(x)) return globify(x);

    return Pattern.compile(Pattern.quote(x));
  }

  public static Pattern globify(String templateName) {
    final String escapedPattern = templateName
      .replaceAll("\\.", "\\\\.")
      .replaceAll("\\Q*\\E", ".*")
      .replaceAll("\\Q?\\E", ".")
      .replaceAll("(\\Q.*\\E){2,}", ".*");

    return Pattern.compile(escapedPattern
    );
  }

  public static boolean hasWildcards(String input) {
    return (input.indexOf('*') != -1 || input.indexOf('?') != -1);
  }
}