BuilderProblem.Severity.ERROR,
                            "pluginGroups.pluginGroup[" + i + "]",
                            null,
                            "must denote a valid group id and match the pattern " + ID);
                }
            }
        }

        List<Server> servers = settings.getServers();

        if (servers != null) {

                "id", "string://url", new ArtifactRepositoryLayoutStub(), policy, policy);

        Artifact artifact = new DefaultArtifact(
                "sample.group",
                "sample-art",
                VersionRange.createFromVersion("1.0"),
                "scope",
                "jar",
                "classifier",
                null);

    }

    /**
     * Searches an artifact of the given group and artifact identifiers, and returns its path
     *
     * @param group the group identifier to search
     * @param artifact the artifact identifier to search
     * @return path to the desired artifact, or {@code null} if not found
     */
    private Path findArtifactPath(String group, String artifact) throws IOException {

                Matcher m = EXPRESSION_NAME_PATTERN.matcher(repository.getUrl());
                while (m.find()) {
                    if (!("basedir".equals(m.group(1)) || "project.basedir".equals(m.group(1)))) {
                        validateStringNoExpression(
                                prefix + prefix2 + "[" + repository.getId() + "].url",
                                problems,

 * is meant for exclusive consumption by the model builder and is opaque to the cache implementation. The cache key is
 * formed by a combination of group id, artifact id, version and tag. The first three components generally refer to the
 * identity of a model. The tag allows for further classification of the associated data on the sole discretion of the
 * model builder.
 *
 */

                            + "\". You must specify a valid lifecycle phase"
                            + " or a goal in the format <plugin-prefix>:<goal> or"
                            + " <plugin-group-id>:<plugin-artifact-id>[:<plugin-version>]:<goal>. Available lifecycle phases are: "
                            + defaultLifecycles.getLifecyclePhaseList() + ".",
                    lifecyclePhase);
        }

        </field>
      </fields>
    </class>

    <class java.clone="deep">
      <name>Plugin</name>
      <version>1.0.0+</version>
      <description>Mapping information for a single plugin within this group.</description>
      <comment>NOTE: plugin version is _NOT_ included here, since it is resolved using a separate algorithm in plugins' artifact.</comment>
      <fields>
        <field>
          <name>name</name>

without prior written permission. For written * permission, please contact ******@****.***. * * 5. Products derived from this software may not be called "Apache" * nor may "Apache" appear in their names without prior written * permission of the Apache Group. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE...