import java.util.concurrent.atomic.AtomicReference;

import org.apache.maven.execution.MavenSession;
import org.apache.maven.plugin.LegacySupport;
import org.eclipse.aether.RepositorySystemSession;

/**
 * Helps to provide backward-compatibility with plugins that use legacy components. <strong>Warning:</strong> This is an
 * internal utility component that is only public for technical reasons, it is not part of the public API. In

import org.apache.maven.api.plugin.descriptor.lifecycle.Lifecycle;

/**
 * Interface that can be provided by the plugin to wire in custom lifecycles
 * leveraged using the {@link org.apache.maven.api.plugin.annotations.Execute}
 * annotation.  If a {@code META-INF/maven/lifecycle.xml} file is packaged
 * in the plugin, Maven will provide a default implementation that will parse
 * the file and return the contained lifecycle definitions.
 *

/**
 * A type implemented by, or extended by maven plugins or extensions.
 * Maven plugins or extensions may provide implementations of those types which will be used by maven.
 * <p>
 * A type can be marked {@link Consumer} or {@link Provider} but not both. A type is assumed to be
 * {@link Consumer} if it is not marked either {@link Consumer} or {@link Provider}.
 * <p>

import org.apache.maven.bridge.MavenRepositorySystem;
import org.apache.maven.plugin.LegacySupport;
import org.apache.maven.project.ProjectBuilder;

/**
 * This realizes the metadata source via the default hint to provide backward-compat with Maven 2.x whose Plexus version
 * registered component descriptors twice: once keyed by role+roleHint and once keyed by role only. This effectively

/**
 * Collects problems that are encountered during model building. The primary purpose of this component is to account for
 * the fact that the problem reporter has/should not have information about the calling context and hence cannot provide
 * an expressive source hint for the model problem. Instead, the source hint is configured by the model builder before
 * it delegates to other components that potentially encounter problems. Then, the problem reporter can focus on

 * core parameters by default).
 *
 */
abstract class AbstractMavenPluginDescriptorSourcedParametersValidator extends AbstractMavenPluginParametersValidator {

    // plugin author can provide @Parameter( property = "session" ) in this case property will always evaluate
    // so, we need ignore those

    // source org.apache.maven.plugin.PluginParameterExpressionEvaluator

      <releases>
        <enabled>false</enabled>
      </releases>
    </repository>
  </repositories>
  <distributionManagement>
    <!-- Site omitted - each project must provide their own -->
    <repository>
      <id>apache.releases</id>
      <name>Apache Release Distribution Repository</name>
      <url>scp://minotaur.apache.org/www/www.apache.org/dist/maven-repository</url>
    </repository>

     * try to merge the element attributes and values, rather than overriding the recessive element completely with the
     * dominant one. This means that wherever the dominant element doesn't provide the value or a particular attribute,
     * that value or attribute will be set from the recessive DOM node.
     */
    String DEFAULT_SELF_COMBINATION_MODE = SELF_COMBINATION_MERGE;

    @Nonnull
    String getName();

        JavaToolchainImpl jtc = new DefaultJavaToolChain(model, logger);

        // populate the provides section
        Properties provides = model.getProvides();
        for (Entry<Object, Object> provide : provides.entrySet()) {
            String key = (String) provide.getKey();
            String value = (String) provide.getValue();

            if (value == null) {
                throw new MisconfiguredToolchainException(

    private final MessageBuilderFactory messageBuilderFactory;

    /**
     * Default ctor is used in IT and most probably some 3rd party code. For those cases, we do provide sane defaults
     * but given this is a component, injection should be used, replacing direct instantiation.
     *
     * @deprecated Do not use this ctor directly, inject this component instead.
     */
    @Deprecated