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ProGuardCORE is a free library to read, analyze, modify, and write Java class files.

There is a newer version: 9.1.6

/*
 * ProGuard -- shrinking, optimization, obfuscation, and preverification
 *             of Java bytecode.
 *
 * Copyright (c) 2002-2022 Guardsquare NV
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 2 of the License, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
package proguard.util;

/**
 * This StringMatcher delegates its tests to another given StringMatcher, with strings that have
 * been transformed with a given function.
 *
 * @author Eric Lafortune
 */
public class TransformedStringMatcher extends StringMatcher {
  private final StringFunction stringFunction;
  private final StringMatcher stringMatcher;

  /**
   * Creates a new TransformedStringMatcher.
   *
   * @param stringFunction the function to transform strings.
   * @param stringMatcher the string matcher to test the transformed strings.
   */
  public TransformedStringMatcher(StringFunction stringFunction, StringMatcher stringMatcher) {
    this.stringFunction = stringFunction;
    this.stringMatcher = stringMatcher;
  }

  // Implementations for StringMatcher.

  @Override
  public boolean matches(String string) {
    return stringMatcher.matches(stringFunction.transform(string));
  }

  @Override
  protected boolean matches(String string, int beginOffset, int endOffset) {
    return stringMatcher.matches(
        stringFunction.transform(string.substring(beginOffset, endOffset)));
  }
}