/*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you 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 org.apache.maven.artifact.versioning;
  
  /**
   * Describes a restriction in versioning.
   *
   * @author <a href="mailto:brett@apache.org">Brett Porter</a>
   */
  public class Restriction {
      private final ArtifactVersion lowerBound;
  
      private final boolean lowerBoundInclusive;
  
      private final ArtifactVersion upperBound;
  
      private final boolean upperBoundInclusive;
  
      public static final Restriction EVERYTHING = new Restriction(null, false, null, false);
  
      public Restriction(
              ArtifactVersion lowerBound,
              boolean lowerBoundInclusive,
              ArtifactVersion upperBound,
              boolean upperBoundInclusive) {
          this.lowerBound = lowerBound;
          this.lowerBoundInclusive = lowerBoundInclusive;
          this.upperBound = upperBound;
          this.upperBoundInclusive = upperBoundInclusive;
      }
  
      public ArtifactVersion getLowerBound() {
          return lowerBound;
      }
  
      public boolean isLowerBoundInclusive() {
          return lowerBoundInclusive;
      }
  
      public ArtifactVersion getUpperBound() {
          return upperBound;
      }
  
      public boolean isUpperBoundInclusive() {
          return upperBoundInclusive;
      }
  
      public boolean containsVersion(ArtifactVersion version) {
          if (lowerBound != null) {
              int comparison = lowerBound.compareTo(version);
  
              if ((comparison == 0) && !lowerBoundInclusive) {
                  return false;
              }
              if (comparison > 0) {
                  return false;
              }
          }
          if (upperBound != null) {
              int comparison = upperBound.compareTo(version);
  
              if ((comparison == 0) && !upperBoundInclusive) {
                  return false;
              }
              return comparison >= 0;
          }
  
          return true;
      }
  
      @Override
      public int hashCode() {
          int result = 13;
  
          if (lowerBound == null) {
              result += 1;
          } else {
              result += lowerBound.hashCode();
          }
  
          result *= lowerBoundInclusive ? 1 : 2;
  
          if (upperBound == null) {
             result -= 3;
         } else {
             result -= upperBound.hashCode();
         }
 
         result *= upperBoundInclusive ? 2 : 3;
 
         return result;
     }
 
     @Override
     public boolean equals(Object other) {
         if (this == other) {
             return true;
         }
 
         if (!(other instanceof Restriction)) {
             return false;
         }
 
         Restriction restriction = (Restriction) other;
         if (lowerBound != null) {
             if (!lowerBound.equals(restriction.lowerBound)) {
                 return false;
             }
         } else if (restriction.lowerBound != null) {
             return false;
         }
 
         if (lowerBoundInclusive != restriction.lowerBoundInclusive) {
             return false;
         }
 
         if (upperBound != null) {
             if (!upperBound.equals(restriction.upperBound)) {
                 return false;
             }
         } else if (restriction.upperBound != null) {
             return false;
         }
 
         return upperBoundInclusive == restriction.upperBoundInclusive;
     }
 
     public String toString() {
         StringBuilder buf = new StringBuilder();
 
         buf.append(isLowerBoundInclusive() ? '[' : '(');
         if (getLowerBound() != null) {
             buf.append(getLowerBound().toString());
         }
         buf.append(',');
         if (getUpperBound() != null) {
             buf.append(getUpperBound().toString());
         }
         buf.append(isUpperBoundInclusive() ? ']' : ')');
 
         return buf.toString();
     }
 }