String rawChildModelVersion = childModel.getVersion();

                if (rawChildModelVersion == null) {
                    // Message below is checked for in the MNG-2199 core IT.
                    problems.add(
                            Severity.FATAL,
                            ModelProblem.Version.V31,
                            "Version must be a constant",

     * filters out currently built artifacts, as events are fired for them as well, but their resolved artifact
     * file would point to checked out source-tree, not the local repository.
     * <p>
     * Visible for testing.
     */
    static boolean isLocalRepositoryArtifactOrMissing(RepositorySystemSession session, Artifact artifact) {

            Maven required to use the resulting plugin.<br>
            In Maven 2, this was also specifying the minimum version of Maven required to build a
            project, but this usage is <b>deprecated</b> in Maven 3 and not checked any more: use
            the <a href="https://maven.apache.org/enforcer/enforcer-rules/requireMavenVersion.html">Maven Enforcer Plugin's
            {@code requireMavenVersion} rule</a> instead.
            ]]>

package org.apache.maven.project;

import org.apache.maven.artifact.Artifact;

/**
 * This exception is thrown if an application attempts to attach
 * two of the same artifacts to a single project.
 *
 * TODO Make this a checked exception, and modify the API of MavenProjectHelper.
 * Currently, this modification would create compatibility problems for existing plugins.
 */
public class DuplicateArtifactAttachmentException extends RuntimeException {

    /**
     * Returns a new tree starting at this node, filtering the children.
     * Note that this node will not be filtered and only the children
     * and its descendant will be checked.
     *
     * @param filter the filter to apply
     * @return a new filtered graph
     */
    @Nonnull
    Node filter(@Nonnull Predicate<Node> filter);

    /**

                            if (logger.isDebugEnabled()) {
                                // Message below is checked for in the MNG-2199 core IT.
                                logger.warn("Failed to build parent project for " + project.getId(), e);
                            } else {
                                // Message below is checked for in the MNG-2199 core IT.

                    && versionRangeResult.getVersionConstraint().getRange() != null
                    && versionRangeResult.getVersionConstraint().getRange().getUpperBound() == null) {
                // Message below is checked for in the MNG-2199 core IT.
                throw new UnresolvableModelException(
                        String.format(
                                "The requested parent version range '%s' does not specify an upper bound",

Finder typeFinder) { this.expectedType = typeFinder.findExpectedType(getClass()); } /** * Subclasses should implement this. The item will already have been checked for * the specific type and will never be null. */ protected abstract boolean matchesSafely(T item); /** * Subclasses should override this. The item will already have been checked for * the specific type and will never be null. */ protected void describeMismatchSafe(T item, Description mismatchDescription) { super.describeMismatch(item,...

 *     <code>1.0alpha1 =&gt; [1, [alpha, 1]]</code></li>
 * <li>unlimited number of version components,</li>
 * <li>version components in the text can be digits or strings,</li>
 * <li>strings are checked for well-known qualifiers and the qualifier ordering is used for version ordering.
 *     Well-known qualifiers (case insensitive) are:<ul>
 *     <li><code>alpha</code> or <code>a</code></li>

Method Detail matchesSafely protected abstract boolean matchesSafely(T item) Subclasses should implement this. The item will already have been checked for the specific type and will never be null. describeMismatchSafe protected void describeMismatchSafe(T item, Description mismatchDescription) Subclasses should override this. The item will already have been checked for the specific type and will never be null. matches public final boolean matches(java.lang.Object item) Methods made final to prevent accidental...