public List reorderJAXBElements()

in plugins/org.apache.geronimo.st.v21.core/src/main/java/org/apache/geronimo/st/v21/core/internal/DependencyHelper.java [245:331]
63 lines of code
20 McCabe index (conditional complexity)

    public List<JAXBElement> reorderJAXBElements( List<JAXBElement> jaxbElements ) {
        Trace.tracePoint("Entry", Activator.traceInternal, "DependencyHelper.reorderModules", jaxbElements);

        if (jaxbElements.size() == 0) {
            Trace.tracePoint("Exit ", Activator.traceInternal, "DependencyHelper.reorderModules", jaxbElements);
            return jaxbElements;
        }

        inputJAXBElements = jaxbElements;

        // 
        // Iterate through all the JAXBElements and register the dependencies
        // 
        for (JAXBElement jaxbElement : jaxbElements) {
            Environment environment = getEnvironment(jaxbElement);
            if (environment != null) {
                Artifact child = environment.getModuleId();
                if (child != null) {
                    Dependencies dependencies = environment.getDependencies();
                    if (dependencies != null) {
                        List<Dependency> depList = dependencies.getDependency();
                        if (depList != null) {
                            for ( Dependency dep : depList) {
                                Artifact parent = deploymentFactory.createArtifact();
                                parent.setGroupId( dep.getGroupId() );
                                parent.setArtifactId( dep.getArtifactId() );
                                parent.setVersion( dep.getVersion() );
                                parent.setType( dep.getType() );
                                dm.addDependency( child, parent );
                            }
                        }
                    }
                }
            }
        }

        // 
        // Iterate through all the JAXBElements again and reorder as necessary
        // 
        for (JAXBElement jaxbElement : jaxbElements) {
            if (!reorderedJAXBElements.contains(jaxbElement)) {
                // Not already moved
                Environment environment = getEnvironment(jaxbElement);
                if (environment != null) {
                    Artifact artifact = environment.getModuleId();
                    if (artifact == null) {
                        // Move if null (nothing can be done)
                        if (!reorderedJAXBElements.contains(jaxbElement)) {
                            reorderedJAXBElements.add(jaxbElement);
                        }
                    }
                    else if (dm.getParents(artifact).contains(artifact) ||  
                             dm.getChildren(artifact).contains(artifact)) {
                        // Move if a tight circular dependency (nothing can be done)
                        if (!reorderedJAXBElements.contains(jaxbElement)) {
                            reorderedJAXBElements.add(jaxbElement);
                        }
                    }
                    else if (dm.getParents(artifact).size() == 0) {
                        // Move if no parents (nothing to do)
                        if (!reorderedJAXBElements.contains(jaxbElement)) {
                            reorderedJAXBElements.add(jaxbElement);
                        }
                    }
                    else if (dm.getParents(artifact).size() > 0) {
                        // Move parents first
                        processJaxbParents(dm.getParents(artifact), artifact);
                        // Move self 
                        if (!reorderedJAXBElements.contains(jaxbElement)) {
                            reorderedJAXBElements.add(jaxbElement);
                        }
                    }
                }
            }
        }

        // 
        // Ensure return list is exactly the same size as the input list 
        // 
        assert reorderedJAXBElements.size() == jaxbElements.size();

        // 
        // Return List of JAXBElements
        // 
        Trace.tracePoint("Exit ", Activator.traceInternal, "DependencyHelper.reorderModules", reorderedJAXBElements);
        return reorderedJAXBElements;
    }