maven-plugin-api Specification-Title: Maven is a project development management and com prehension tool. Based on the concept of a project object model: buil ds, dependency management, documentation creation, site publication, and distribution publication are all controlled from the declarative file. Maven can be extended by plugins to utilise a number of other d evelopment tools for reporting or the build process. Specification-Vendor: Apache Software Foundation Implementation-Vendor: Apache Software Foundation...

        return project == null ? null : project.getModel().getDelegate();
    }

    //
    // Implementation
    //

    private File findArtifact(MavenProject project, Artifact artifact) {
        // POMs are always returned from the file system
        if ("pom".equals(artifact.getExtension())) {
            return project.getFile();
        }

        // First check in the project local repository

     * @return the user properties, never {@code null}
     */
    @Nonnull
    Map<String, String> getUserProperties();

    /**
     * Returns immutable system properties to use for interpolation. The system properties are collected from the
     * runtime environment such as {@link System#getProperties()} and environment variables
     * (prefixed with {@code env.}).
     *
     * @return the system properties, never {@code null}
     */

     * In case the project is loaded externally from a remote repository (as a dependency or
     * even as an external parent), the POM will be parsed in a lenient way.  Local POMs
     * are parsed more strictly.
     */
    boolean isProjectBuild();

    /**
     * Specifies whether plugin processing should take place for the built model.

 * graph construction.
 * <p>
 * Extend this class {@code createXXX()} methods and override to customize, if needed. The contract of this class makes
 * sure that these (potentially overridden) methods are invoked only once, and instance created by those methods are
 * memorized and kept as long as supplier instance is kept open.
 * <p>
 * This class is not thread safe and must be used from one thread only, while the constructed {@link RepositorySystem}