}

        String msg = "";
        if (exception != null) {
            msg = ": " + exception.getMessage();
        }

        if (logger.isDebugEnabled()) {
            logger.warn("The metadata {} {}{}", metadata, errorType, msg, exception);
        } else {
            logger.warn("The metadata {} {}{}", metadata, errorType, msg);
        }
    }

    @Override

                    String msg = str + " aggregator mojo is already being executed "
                            + "in this parallel build, those kind of mojos require exclusive access to "
                            + "reactor to prevent race conditions. This mojo execution will be blocked "
                            + "until the aggregator mojo is done.";
                    warn(msg);

    }

    private static String getMessage(Throwable error, String def) {
        if (error == null) {
            return def;
        }
        String msg = error.getMessage();
        if (msg != null && !msg.isEmpty()) {
            return msg;
        }
        return getMessage(error.getCause(), def);
    }

    private ArtifactRepositoryLayout getLayout(String id) {

                String msg = "The expression ${" + expression + "} is deprecated.";
                if (newPrefix != null && !newPrefix.isEmpty()) {
                    msg += " Please use ${" + newPrefix + expression.substring(bannedPrefix.length()) + "} instead.";
                }
                problems.add(BuilderProblem.Severity.WARNING, ModelProblem.Version.V20, msg);
            }

            return value;

        } catch (IOException e) {
            String msg = e.getMessage();
            if (msg == null || msg.isEmpty()) {
                // NOTE: There's java.nio.charset.MalformedInputException and sun.io.MalformedInputException
                if (e.getClass().getName().endsWith("MalformedInputException")) {
                    msg = "Some input bytes do not match the file encoding.";
                } else {

            } catch (PluginResolutionException e) {
                String msg = "Cannot setup plugin realm [mojoDescriptor=" + mojoDescriptor.getId()
                        + ", pluginDescriptor=" + pluginDescriptor.getId() + "]";
                throw new PluginConfigurationException(pluginDescriptor, msg, e);
            }
            pluginRealm = pluginDescriptor.getClassRealm();
        }

        assertEquals("reloc-aid", pom.getValue("distributionManagement/relocation/artifactId"));
        assertEquals("reloc-version", pom.getValue("distributionManagement/relocation/version"));
        assertEquals("project-reloc-msg", pom.getValue("distributionManagement/relocation/message"));

        assertEquals(1, ((List<?>) pom.getValue("modules")).size());
        assertEquals("sub", pom.getValue("modules[1]"));

        String msg = indent + artifact;
        msg += " (";
        if (replacement.getVersion() != null) {
            msg += "applying version: " + replacement.getVersion() + ";";
        }
        if (replacement.getScope() != null) {
            msg += "applying artifactScope: " + replacement.getScope();
        }
        msg += ")";
        logger.debug(msg);
    }

    }

    public String getMessage() {
        String msg;

        if (message != null && !message.isEmpty()) {
            msg = message;
        } else {
            msg = exception.getMessage();

            if (msg == null) {
                msg = "";
            }
        }

        return msg;
    }

    public Severity getSeverity() {
        return severity;

public class OverConstrainedVersionException extends ArtifactResolutionException {
    public OverConstrainedVersionException(String msg, Artifact artifact) {
        super(msg, artifact);
    }

    public OverConstrainedVersionException(String msg, Artifact artifact, List<ArtifactRepository> remoteRepositories) {
        super(msg, artifact, remoteRepositories);
    }