code: /**
   * This file is part of Eclipse Steady.
   *
   * 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.
   *
   * SPDX-License-Identifier: Apache-2.0
   * SPDX-FileCopyrightText: Copyright (c) 2018-2020 SAP SE or an SAP affiliate company and Eclipse Steady contributors
   */
  /**
   *
   */
  package org.eclipse.steady.shared.json.model;
  
  import java.util.HashSet;
  import java.util.Map;
  
  import org.apache.commons.configuration.Configuration;
  
  /**
   * A set of {@link IExemption}s.
   */
  public class ExemptionSet extends HashSet<IExemption> {
  
    /**
     *
     */
    private static final long serialVersionUID = 1L;
  
    /**
     * Loops over the exemptions to find one that exempts the given {@link VulnerableDependency}.
     * If such an exemption is found, it is returned. Otherwise, the method returns null.
     *
     * @param _vd a {@link org.eclipse.steady.shared.json.model.VulnerableDependency} object
     * @return a {@link org.eclipse.steady.shared.json.model.IExemption} object
     */
    public IExemption getApplicableExemption(VulnerableDependency _vd) {
      if (!this.isEmpty()) {
        for (IExemption e : this) {
          if (e.isExempted(_vd)) return e;
        }
      }
      return null;
    }
  
    /**
     * Returns the subset of {@link IExemption}s that are of the given {@link Class}(es).
     *
     * @param _class a {@link java.lang.Class} object
     * @return a {@link org.eclipse.steady.shared.json.model.ExemptionSet} object
     */
    public ExemptionSet subset(Class<? extends IExemption> _class) {
      final ExemptionSet subset = new ExemptionSet();
      for (IExemption e : this) {
        if (_class.isInstance(e)) {
          subset.add(e);
          continue;
        }
      }
      return subset;
    }
  
    /** {@inheritDoc} */
    @Override
    public String toString() {
      final StringBuffer b = new StringBuffer();
      for (IExemption e : this) {
        if (b.length() > 0) b.append(", ");
        b.append(e.toShortString());
      }
      return b.toString();
    }
  
    /**
     * Creates a set of {@link IExemption}s by reading the settings from the given {@link Configuration}.
     *
     * @param _cfg a {@link org.apache.commons.configuration.Configuration} object
     * @return a {@link org.eclipse.steady.shared.json.model.ExemptionSet} object
     */
    public static ExemptionSet createFromConfiguration(Configuration _cfg) {
      final ExemptionSet set = new ExemptionSet();
      set.addAll(ExemptionBug.readFromConfiguration(_cfg));
      set.addAll(ExemptionScope.readFromConfiguration(_cfg));
      set.addAll(ExemptionUnassessed.readFromConfiguration(_cfg));
      return set;
    }
  
    /**
     * Creates a set of {@link IExemption}s by reading the settings from the given {@link Map}.
     *
     * @param _map a {@link java.util.Map} object
     * @return a {@link org.eclipse.steady.shared.json.model.ExemptionSet} object
     */
    public static ExemptionSet createFromMap(Map<String, String> _map) {
      final ExemptionSet set = new ExemptionSet();
      set.addAll(ExemptionBug.readFromConfiguration(_map));
      set.addAll(ExemptionScope.readFromConfiguration(_map));
      set.addAll(ExemptionUnassessed.readFromConfiguration(_map));
      return set;
    }
  }
  