* StringUtil.defaultString("aaa", "NULL") = "aaa"
     * StringUtil.defaultString("aaa", null)   = "aaa"
     * StringUtil.defaultString(null, null)    = null
     * </pre>
     *
     * @param str
     *            the string (can be <code>null</code>)
     * @param defaultStr
     *            the string to return if the argument is <code>null</code> (can be <code>null</code>)

        DefaultLifecycleRegistry lifecycles = new DefaultLifecycleRegistry(Collections.emptyList());
        BuildPlanExecutor builder = new BuildPlanExecutor(null, null, null, null, null, null, null, null, lifecycles);
        BuildPlanExecutor.BuildContext context = builder.new BuildContext();
        return context.calculateLifecycleMappings(projects, phase);
    }

    /*
    @Test

        return treeRoot == null ? null : new MetadataGraph(treeRoot);
    }
    // ----------------------------------------------------------------------------
    public MetadataGraph getGraph(ArtifactScopeEnum scope)
            throws MetadataResolutionException, GraphConflictResolutionException {
        if (treeRoot == null) {
            return null;
        }

        if (conflictResolver == null) {

        NegTokenInit p4 = new NegTokenInit(tokenTag4);
        assertArrayEquals(mic, p4.getMechanismListMIC(), "MIC should be parsed from tag [4]");

        // Tag [3]
        byte[] tokenTag3 = buildInitToken(new ASN1ObjectIdentifier[] { OID_KRB }, null, null, mic, false, null, null, null);
        NegTokenInit p3 = new NegTokenInit(tokenTag3);

        this.groupId = (groupId != null && !groupId.isEmpty()) ? groupId : null;
        this.artifactId = (artifactId != null && !artifactId.isEmpty()) ? artifactId : null;
        this.classifier = (classifier != null && !classifier.isEmpty()) ? classifier : null;
        this.extension = (extension != null && !extension.isEmpty()) ? extension : null;

     *
     * @param arrays
     *            the array
     * @return {@literal true} if the array is {@literal null} or has a length of 0
     */
    public static boolean isEmpty(final boolean[] arrays) {
        return arrays == null || arrays.length == 0;
    }

    /**
     * Returns {@literal true} if the array is not {@literal null} and its length is not 0.

        return build(session, artifactCoordinates, null, null);
    }

    /**
     * Creates a version range resolver request.
     *
     * @param session the session to use, must not be {@code null}
     * @param artifactCoordinates the artifact coordinates whose version range should be resolved, must not be {@code null}
     * @param repositories the repositories to use, or {@code null} to use the session's repositories

        if (model == null) {
            return "";
        }

        String groupId = model.getGroupId();
        if (groupId == null && model.getParent() != null) {
            groupId = model.getParent().getGroupId();
        }

        String artifactId = model.getArtifactId();

        String version = model.getVersion();
        if (version == null && model.getParent() != null) {

        when(mockCalledName.getNameType()).thenReturn(0x20);
        when(mockCalledName.getScope()).thenReturn(null);

        when(mockCallingName.getName()).thenReturn("CLIENT");
        when(mockCallingName.getNameType()).thenReturn(0x00);
        when(mockCallingName.getScope()).thenReturn(null);

        SessionRequestPacket packet = new SessionRequestPacket(mockConfig, mockCalledName, mockCallingName);

            // Then
            assertNotNull(os1, "Default output stream should not be null");
            assertNotNull(os2, "Output stream with append should not be null");
            assertNotNull(os3, "Output stream with sharing should not be null");
            assertNotNull(os4, "Output stream with full params should not be null");
            assertSame(mockOutputStream, os1, "Should return expected output stream");