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/*
 * SonarQube Runner - API
 * Copyright (C) 2011 SonarSource
 * [email protected]
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02
 */
package org.sonar.runner.impl;

import javax.annotation.concurrent.Immutable;

import java.util.ArrayList;
import java.util.List;
import java.util.Set;

@Immutable
public class ClassloadRules {
  private final List mask;
  private final List unmask;

  public ClassloadRules(Set maskRules, Set unmaskRules) {
    this.mask = new ArrayList<>(maskRules);
    this.unmask = new ArrayList<>(unmaskRules);
  }

  public boolean canLoad(String className) {
    // if there is a tie -> block it
    return unmaskSize(className) > maskSize(className);
  }

  private int maskSize(String className) {
    return findBestMatch(mask, className);
  }

  private int unmaskSize(String className) {
    return findBestMatch(unmask, className);
  }

  private static int findBestMatch(List list, String name) {
    // there can be a match of 0 ("")
    int bestMatch = -1;
    for (String s : list) {
      if (name.startsWith(s) && s.length() > bestMatch) {
        bestMatch = s.length();
      }
    }

    return bestMatch;
  }
}