code: /*
   *
   * Copyright (c) 2008, All Rights Reserved.
   *
   * 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.
   *
   * Portions of the code may be copied from Google Collections
   * or Apache Commons projects.
   */
  
  package zemberek.core.io;
  
  
  import com.google.common.base.Preconditions;
  import java.util.List;
  import java.util.regex.Pattern;
  
  class StringFilters {
  
    public static final Filter<String> PASS_ALL = new AllPassFilter();
    public static final Filter<String> PASS_NON_NULL_OR_EMPTY = new NullOrEmptyFilter();
    public static final Filter<String> PASS_ONLY_TEXT = new HasNoTextFilter();
  
    public static Filter<String> newRegexpFilter(String regexp) {
      return new RegexpFilter(regexp, false);
    }
  
    public static Filter<String> newRegexpFilterIgnoreCase(String regexp) {
      return new RegexpFilter(regexp, true);
    }
  
    public static Filter<String> newRegexpFilter(Pattern pattern) {
      return new RegexpFilter(pattern);
    }
  
    public static Filter<String> newPrefixFilter(String prefix) {
      return new PrefixFilter(prefix);
    }
  
    public static boolean canPassAll(String s, List<Filter<String>> filters) {
      for (Filter<String> filter : filters) {
        if (!filter.canPass(s)) {
          return false;
        }
      }
      return true;
  
    }
  
    public static boolean canPassAll(String s, Filter<String>... filters) {
  
      for (Filter filter : filters) {
        if (!filter.canPass(s)) {
          return false;
        }
      }
      return true;
    }
  
    public static boolean canPassAny(String s, Filter<String>... filters) {
      for (Filter filter : filters) {
        if (filter.canPass(s)) {
          return true;
        }
      }
      return false;
    }
  
    private static class AllPassFilter implements Filter<String> {
  
      public boolean canPass(String str) {
        return true;
      }
    }
  
    private static class NullOrEmptyFilter implements Filter<String> {
  
      public boolean canPass(String str) {
        return !Strings.isNullOrEmpty(str);
      }
    }
  
    private static class HasNoTextFilter implements Filter<String> {
  
      public boolean canPass(String str) {
        return Strings.hasText(str);
      }
    }
  
    private static class PrefixFilter implements Filter<String> {
  
      String token;
  
      private PrefixFilter(String token) {
        Preconditions.checkNotNull(token, "Cannot initialize Filter with null string.");
        this.token = token;
      }
  
      public boolean canPass(String s) {
        return s != null && s.startsWith(token);
      }
    }
  
    private static class RegexpFilter implements Filter<String> {
  
      final Pattern pattern;
  
      public RegexpFilter(String regExp, boolean ignoreCase) {
        Preconditions.checkNotNull(regExp, "regexp String cannot be null.");
        Preconditions.checkArgument(!Strings.isNullOrEmpty(regExp), "regexp String cannot be empty");
        if (ignoreCase) {
          this.pattern = Pattern.compile(regExp, Pattern.CASE_INSENSITIVE);
        } else {
          this.pattern = Pattern.compile(regExp);
        }
      }
  
      public RegexpFilter(Pattern pattern) {
        this.pattern = pattern;
      }
  
      public boolean canPass(String s) {
        return s != null && pattern.matcher(s).find();
      }
    }
  
  
  }
  