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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

/*
 * ProGuardCORE -- library to process Java bytecode.
 *
 * Copyright (c) 2002-2020 Guardsquare NV
 *
 * 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 proguard.util;

/**
 * This {@link StringMatcher} tests whether strings match a given list of {@link StringMatcher}
 * instances. The instances are considered sequentially. Each instance in the list can optionally be
 * negated, meaning that a match makes the entire remaining match fail.
 *
 * @author Eric Lafortune
 */
public class ListMatcher extends StringMatcher {
  private final StringMatcher[] matchers;
  private final boolean[] negate;

  public ListMatcher(StringMatcher... matchers) {
    this(matchers, null);
  }

  public ListMatcher(StringMatcher[] matchers, boolean[] negate) {
    this.matchers = matchers;
    this.negate = negate;
  }

  // Implementations for StringMatcher.

  @Override
  protected boolean matches(String string, int beginOffset, int endOffset) {
    // Check the list of matchers.
    for (int index = 0; index < matchers.length; index++) {
      StringMatcher matcher = matchers[index];
      if (matcher.matches(string, beginOffset, endOffset)) {
        return negate == null || !negate[index];
      }
    }

    return negate != null && negate[negate.length - 1];
  }
}