X-Git-Url: https://mograsim.net/gitweb/?a=blobdiff_plain;f=plugins%2Fnet.mograsim.plugin.core%2Fsrc%2Fnet%2Fmograsim%2Fplugin%2Fnature%2FProjectMachineContext.java;fp=plugins%2Fnet.mograsim.plugin.core%2Fsrc%2Fnet%2Fmograsim%2Fplugin%2Fnature%2FProjectMachineContext.java;h=0e6185c410045ad5d5fcf0a8c385700de556f02d;hb=f919efc362c3de5c94d894dc8fc7fe22c03fc865;hp=0000000000000000000000000000000000000000;hpb=76c2b3eab6cec47490bb75713356152deb5d07ed;p=Mograsim.git

diff --git a/plugins/net.mograsim.plugin.core/src/net/mograsim/plugin/nature/ProjectMachineContext.java b/plugins/net.mograsim.plugin.core/src/net/mograsim/plugin/nature/ProjectMachineContext.java
new file mode 100644
index 00000000..0e6185c4
--- /dev/null
+++ b/plugins/net.mograsim.plugin.core/src/net/mograsim/plugin/nature/ProjectMachineContext.java
@@ -0,0 +1,91 @@
+package net.mograsim.plugin.nature;
+
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Optional;
+
+import org.eclipse.core.resources.IProject;
+import org.eclipse.core.resources.ProjectScope;
+import org.eclipse.core.runtime.Adapters;
+import org.eclipse.core.runtime.CoreException;
+import org.eclipse.core.runtime.IAdaptable;
+import org.eclipse.ui.preferences.ScopedPreferenceStore;
+
+public class ProjectMachineContext
+{
+	private static Map<IProject, MachineContext> projectMachineContexts = Collections.synchronizedMap(new HashMap<>());
+
+	public static final String MOGRASIM_PROJECT_PREFS_NODE = "net.mograsim";
+	public static final String MACHINE_PROPERTY = "net.mograsim.projectMachineId";
+
+	public static MachineContext getMachineContextOf(IProject project)
+	{
+		MachineContext mc = projectMachineContexts.get(project);
+		if (mc != null)
+			return mc;
+		validateMograsimNatureProject(project);
+		mc = new MachineContext(project);
+		projectMachineContexts.put(project, mc);
+		return mc;
+	}
+
+	public static MachineContext getMachineContextOf(IAdaptable mograsimProjectAdapable)
+	{
+		IProject project = Adapters.adapt(mograsimProjectAdapable, IProject.class, true);
+		Objects.requireNonNull(project, "project was null / no project found for " + mograsimProjectAdapable);
+		return getMachineContextOf(project);
+	}
+
+	static ScopedPreferenceStore getProjectPrefs(IProject mograsimProject)
+	{
+		return new ScopedPreferenceStore(new ProjectScope(mograsimProject), MOGRASIM_PROJECT_PREFS_NODE);
+	}
+
+	static IProject validateMograsimNatureProject(IAdaptable mograsimProjectAdapable)
+	{
+		IProject project;
+		if (mograsimProjectAdapable instanceof IProject)
+		{
+			project = (IProject) mograsimProjectAdapable;
+		} else
+		{
+			project = Adapters.adapt(mograsimProjectAdapable, IProject.class, true);
+			Objects.requireNonNull(project, () -> mograsimProjectAdapable + " is not adaptable to IProject");
+		}
+		try
+		{
+			if (!project.isNatureEnabled(MograsimNature.NATURE_ID))
+				throw new IllegalArgumentException(mograsimProjectAdapable + "is not (in) a Mograsim project");
+		}
+		catch (CoreException e)
+		{
+			e.printStackTrace();
+			throw new IllegalArgumentException(mograsimProjectAdapable + " project nature could not be evaluated", e);
+		}
+		return project;
+	}
+
+	static boolean hasMograsimNature(IProject project)
+	{
+		if (project == null)
+			return false;
+		try
+		{
+			return project.isNatureEnabled(MograsimNature.NATURE_ID);
+		}
+		catch (CoreException e)
+		{
+			e.printStackTrace();
+			return false;
+		}
+	}
+
+	static Optional<String> getMachineIdFrom(ScopedPreferenceStore preferenceStore)
+	{
+		if (preferenceStore.contains(MACHINE_PROPERTY))
+			return Optional.of(preferenceStore.getString(MACHINE_PROPERTY));
+		return Optional.empty();
+	}
+}