* @return instance for type, null if the type cannot be unwrapped
     */
    <T extends Address> T unwrap ( Class<T> type );


    /**
     * 
     * @return the resolved host name, or the host address if it could not be resolved
     */
    String getHostName ();


    /**
     * Return the IP address as text such as "192.168.1.15".
     * 
     * @return the ip address
     */

                break;
            }
            trace = trace.getParent();
        }
        return collectStepTrace;
    }

    /**
     * The event "artifact resolved" if fired WHENEVER an artifact is resolved, BUT it happens also when an artifact
     * descriptor (model, the POM) is being built, and parent (and parent of parent...) is being asked for. Hence, this

import org.apache.maven.api.model.Repository;
import org.apache.maven.model.building.ModelSource;

/**
 * Resolves a POM from its coordinates. During the build process, the
 * {@link org.apache.maven.model.building.ModelBuilder} will add any relevant repositories to the model resolver. In
 * other words, the model resolver is stateful and should not be reused across multiple model building requests.
 *

import org.apache.maven.artifact.repository.metadata.SnapshotArtifactRepositoryMetadata;
import org.apache.maven.artifact.repository.metadata.Versioning;
import org.apache.maven.artifact.resolver.ArtifactNotFoundException;
import org.apache.maven.artifact.resolver.ArtifactResolutionException;
import org.apache.maven.repository.legacy.WagonManager;
import org.codehaus.plexus.logging.AbstractLogEnabled;

/**

import org.apache.maven.artifact.resolver.ArtifactResolutionException;
import org.apache.maven.artifact.resolver.ArtifactResolutionRequest;
import org.apache.maven.artifact.resolver.ArtifactResolutionResult;
import org.apache.maven.artifact.resolver.CyclicDependencyException;
import org.apache.maven.artifact.resolver.ResolutionListener;
import org.apache.maven.artifact.resolver.ResolutionListenerForDepMgmt;

            throw new CrawlerSystemException("Failed to create XPath instance.", e);
        }
    }

    /**
     *  Use an XPath string to select a nodelist.
     *  XPath namespace prefixes are resolved from the contextNode.
     *
     *  @param contextNode The node to start searching from.
     *  @param expression A valid XPath string.
     *  @return A XPathNodes, should never be null.
     *

     * <p>
     * Specifically, if the SID has
     * been resolved and it is not a domain SID or builtin account,
     * the full DOMAIN\name form of the account will be
     * returned (e.g. MYDOM\alice or MYDOM\Domain Users).
     * If the SID has been resolved but it is is a domain SID,
     * only the domain name will be returned (e.g. MYDOM).
     * If the SID has been resolved but it is a builtin account,

        return artifact.compareTo(a);
    }

    /** {@inheritDoc} */
    public void setResolved(boolean resolved) {
        artifact.setResolved(resolved);
    }

    /** {@inheritDoc} */
    public boolean isResolved() {
        return artifact.isResolved();
    }

    /** {@inheritDoc} */
    public void setResolvedVersion(String version) {

                        log.debug("Resolved '{}' to addrs {} via {}", hostname, Arrays.toString(addr), resolver);
                    }
                    return wrapNetbiosAddresses(addr);
                }
            }
            catch ( IOException ioe ) {
                // Failure
                log.trace("Resolving {} via {} failed:", hostname, resolver);
                log.trace("Exception is", ioe);

 *
 * TODO it may be better for artifact.getFile() to throw it - perhaps it is a runtime exception?
 */
public class DependencyResolutionRequiredException extends Exception {
    public DependencyResolutionRequiredException(Artifact artifact) {
        super("Attempted to access the artifact " + artifact + "; which has not yet been resolved");
    }