io.sundr.swagger.language.ArtifactUtil Maven / Gradle / Ivy

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/**
 * Copyright 2015 The original authors.
 * 
 * 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 io.sundr.swagger.language;

import java.util.Optional;

public class ArtifactUtil {

  public static final String DELIMETER = ":";
  public static final int GROUP_ID_INDEX = 0;
  public static final int ARTIFACT_ID_INDEX = 1;
  public static final int VERSION_INDEX = 2;
  public static final int CLASSIFIER_INDEX = 3;

  /**
   * Extracts the groupId from the specified coordinates
   * 
   * @param coordinates the maven coordinates
   * @return the groupId
   */
  public static String groupId(String coordinates) {
    return split(coordinates)[GROUP_ID_INDEX];
  }

  /**
   * Extracts the artifactId from the specified coordinates
   * 
   * @param coordinates the maven coordinates
   * @return the artifactId
   */
  public static String artifactId(String coordinates) {
    return split(coordinates)[ARTIFACT_ID_INDEX];
  }

  /**
   * Extracts the version from the specified coordinates
   * 
   * @param coordinates the maven coordinates
   * @return the version
   */
  public static String version(String coordinates) {
    return split(coordinates)[VERSION_INDEX];
  }

  /**
   * Extracts the classifier from the specified coordinates
   * 
   * @param coordinates the maven coordinates
   * @return the classifier as an {@link Optional} string.
   */
  public static Optional classifier(String coordinates) {
    String[] parts = split(coordinates);
    if (parts.length == 4) {
      return Optional.of(parts[CLASSIFIER_INDEX]);
    }
    return Optional.empty();
  }

  /**
   * Splits the specified maven coordinates to individual parts: groupId, artifactId, version and optionally classifier.
   * The coordiante format is ::(:)
   * 
   * @param coordinates the specified maven coordinates as a string.
   * @reutrn a {@link String} array with all the coordinate parts
   */
  private static String[] split(String coordinates) {
    if (coordinates == null) {
      throw new NullPointerException("Expected maven coordinates!");
    }
    String[] parts = coordinates.split(DELIMETER);
    if (parts.length < 3 || parts.length > 4) {
      throw new IllegalArgumentException(
          "Maven coordinates are expected to follow the format ::(:)!");
    }
    return parts;
  }
}