/*
    * 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.toolchain;
  
  import org.apache.maven.artifact.versioning.DefaultArtifactVersion;
  import org.apache.maven.artifact.versioning.InvalidVersionSpecificationException;
  import org.apache.maven.artifact.versioning.VersionRange;
  
  /**
   *
   * @author mkleint
   */
  public final class RequirementMatcherFactory {
      private RequirementMatcherFactory() {}
  
      public static RequirementMatcher createExactMatcher(String provideValue) {
          return new ExactMatcher(provideValue);
      }
  
      public static RequirementMatcher createVersionMatcher(String provideValue) {
          return new VersionMatcher(provideValue);
      }
  
      private static final class ExactMatcher implements RequirementMatcher {
  
          private String provides;
  
          private ExactMatcher(String provides) {
              this.provides = provides;
          }
  
          @Override
          public boolean matches(String requirement) {
              return provides.equalsIgnoreCase(requirement);
          }
  
          @Override
          public String toString() {
              return provides;
          }
      }
  
      private static final class VersionMatcher implements RequirementMatcher {
          DefaultArtifactVersion version;
  
          private VersionMatcher(String version) {
              this.version = new DefaultArtifactVersion(version);
          }
  
          @Override
          public boolean matches(String requirement) {
              try {
                  VersionRange range = VersionRange.createFromVersionSpec(requirement);
                  if (range.hasRestrictions()) {
                      return range.containsVersion(version);
                  } else {
                      return range.getRecommendedVersion().compareTo(version) == 0;
                  }
              } catch (InvalidVersionSpecificationException ex) {
                  // TODO error reporting
                  ex.printStackTrace();
                  return false;
              }
          }
  
          @Override
          public String toString() {
              return version.toString();
          }
      }
  }