final Supplier<T> supplier;
        volatile Object value;

        CachingSupplier(Supplier<T> supplier) {
            this.supplier = supplier;
        }

        @Override
        @SuppressWarnings({"unchecked", "checkstyle:InnerAssignment"})
        public T get() {
            Object v;
            if ((v = value) == null) {
                synchronized (this) {

under the License. */ import org.apache.maven.plugin.AbstractMojo; /** * Does nothing. * * @goal java * @phase generate-sources * * @author Benjamin Bentmann */ public class AMojo extends AbstractMojo { /** @parameter expression="${version}" default-value="1.0" */ private String version; /** @parameter */ private String[] models; public void execute() { } } src/main/java/org/apache/maven/plugins/coreit/BMojo.java src/main/java/org/apache/maven/plugins/coreit/BMojo.java package org.apache.maven.plugin.coreit;...

    }

    /**
     * Creates a new Maven-like repository system session by initializing the session with values typical for
     * Maven-based resolution. In more detail, this method configures settings relevant for the processing of dependency
     * graphs, most other settings remain at their generic default value. Use the various setters to further configure

    @Nonnull
    SessionData getData();

    /**
     * Returns immutable user properties to use for interpolation. The user properties have been configured directly
     * by the user, e.g. via the {@code -Dkey=value} parameter on the command line.
     *
     * @return the user properties, never {@code null}
     */
    @Nonnull
    Map<String, String> getUserProperties();

    /**

public void clear(); } org/codehaus/plexus/util/FastMap$Values$1.class package org.codehaus.plexus.util; synchronized class FastMap$Values$1 implements java.util.Iterator { FastMap$EntryImpl after; FastMap$EntryImpl before; void FastMap$Values$1(FastMap$Values); public void remove(); public boolean hasNext(); public Object next(); } org/codehaus/plexus/util/FastMap$Values.class package org.codehaus.plexus.util; synchronized class FastMap$Values extends java.util.AbstractCollection { private void F...

            // the defined parallism, while making sure the pool will not
            // be exhausted
            //
            return new ThreadPoolExecutor(
                    parallelism, Integer.MAX_VALUE, 0L, TimeUnit.MILLISECONDS, new LinkedBlockingQueue<>()) {
                final AtomicInteger parked = new AtomicInteger();

                @Override

        List<String> versions = getProjects()
                .getOrDefault(artifact.getGroupId(), Collections.emptyMap())
                .getOrDefault(artifact.getArtifactId(), Collections.emptyMap())
                .values()
                .stream()
                .map(MavenProject::getVersion)
                .collect(Collectors.collectingAndThen(Collectors.toList(), Collections::unmodifiableList));
        if (!versions.isEmpty()) {

            }
        }

        return true;
    }

    private boolean hasExpression(String value) {
        return value != null && value.contains("${");
    }

    private boolean hasProjectExpression(String value) {
        return value != null && value.contains("${project.");
    }

    private boolean validateStringNotEmpty(
            String fieldName,

        org.eclipse.aether.SessionData data = session.getData();
        return new SessionData() {
            @Override
            public <T> void set(@Nonnull Key<T> key, @Nullable T value) {
                data.set(key, value);
            }

            @Override
            public <T> boolean replace(@Nonnull Key<T> key, @Nullable T oldValue, @Nullable T newValue) {