plugins/net.mograsim.plugin.core/src/net/mograsim/plugin/nature/ProjectMachineContext.java

   1 package net.mograsim.plugin.nature;
   2
   3 import java.util.Collections;
   4 import java.util.HashMap;
   5 import java.util.Map;
   6 import java.util.Objects;
   7 import java.util.Optional;
   8
   9 import org.eclipse.core.resources.IProject;
  10 import org.eclipse.core.resources.ProjectScope;
  11 import org.eclipse.core.runtime.Adapters;
  12 import org.eclipse.core.runtime.CoreException;
  13 import org.eclipse.core.runtime.IAdaptable;
  14 import org.eclipse.ui.preferences.ScopedPreferenceStore;
  15
  16 public class ProjectMachineContext
  17 {
  18         private static Map<IProject, MachineContext> projectMachineContexts = Collections.synchronizedMap(new HashMap<>());
  19
  20         public static final String MOGRASIM_PROJECT_PREFS_NODE = "net.mograsim";
  21         public static final String MACHINE_PROPERTY = "net.mograsim.projectMachineId";
  22
  23         public static MachineContext getMachineContextOf(IProject project)
  24         {
  25                 MachineContext mc = projectMachineContexts.get(project);
  26                 if (mc != null)
  27                         return mc;
  28                 validateMograsimNatureProject(project);
  29                 mc = new MachineContext(project);
  30                 projectMachineContexts.put(project, mc);
  31                 return mc;
  32         }
  33
  34         public static MachineContext getMachineContextOf(IAdaptable mograsimProjectAdapable)
  35         {
  36                 IProject project = Adapters.adapt(mograsimProjectAdapable, IProject.class, true);
  37                 Objects.requireNonNull(project, "project was null / no project found for " + mograsimProjectAdapable);
  38                 return getMachineContextOf(project);
  39         }
  40
  41         static ScopedPreferenceStore getProjectPrefs(IProject mograsimProject)
  42         {
  43                 return new ScopedPreferenceStore(new ProjectScope(mograsimProject), MOGRASIM_PROJECT_PREFS_NODE);
  44         }
  45
  46         static IProject validateMograsimNatureProject(IAdaptable mograsimProjectAdapable)
  47         {
  48                 IProject project;
  49                 if (mograsimProjectAdapable instanceof IProject)
  50                 {
  51                         project = (IProject) mograsimProjectAdapable;
  52                 } else
  53                 {
  54                         project = Adapters.adapt(mograsimProjectAdapable, IProject.class, true);
  55                         Objects.requireNonNull(project, () -> mograsimProjectAdapable + " is not adaptable to IProject");
  56                 }
  57                 try
  58                 {
  59                         if (!project.isNatureEnabled(MograsimNature.NATURE_ID))
  60                                 throw new IllegalArgumentException(mograsimProjectAdapable + "is not (in) a Mograsim project");
  61                 }
  62                 catch (CoreException e)
  63                 {
  64                         e.printStackTrace();
  65                         throw new IllegalArgumentException(mograsimProjectAdapable + " project nature could not be evaluated", e);
  66                 }
  67                 return project;
  68         }
  69
  70         static boolean hasMograsimNature(IProject project)
  71         {
  72                 if (project == null)
  73                         return false;
  74                 try
  75                 {
  76                         return project.isNatureEnabled(MograsimNature.NATURE_ID);
  77                 }
  78                 catch (CoreException e)
  79                 {
  80                         e.printStackTrace();
  81                         return false;
  82                 }
  83         }
  84
  85         static Optional<String> getMachineIdFrom(ScopedPreferenceStore preferenceStore)
  86         {
  87                 if (preferenceStore.contains(MACHINE_PROPERTY))
  88                         return Optional.of(preferenceStore.getString(MACHINE_PROPERTY));
  89                 return Optional.empty();
  90         }
  91 }