Java tutorial
/******************************************************************************* * Copyright (c) 2010 Neil Bartlett. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors: * Neil Bartlett - initial API and implementation *******************************************************************************/ package bndtools.nature; import java.io.ByteArrayInputStream; import java.util.Collections; import java.util.Iterator; import java.util.LinkedList; import java.util.List; import java.util.Set; import org.bndtools.api.BndtoolsConstants; import org.bndtools.headless.build.manager.api.HeadlessBuildManager; import org.bndtools.versioncontrol.ignores.manager.api.VersionControlIgnoresManager; import org.eclipse.core.resources.IFile; import org.eclipse.core.resources.IProject; import org.eclipse.core.resources.IProjectDescription; import org.eclipse.core.resources.IResource; import org.eclipse.core.runtime.CoreException; import org.eclipse.core.runtime.IAdaptable; import org.eclipse.core.runtime.IStatus; import org.eclipse.core.runtime.MultiStatus; import org.eclipse.core.runtime.Status; import org.eclipse.jdt.core.IJavaProject; import org.eclipse.jdt.core.JavaCore; import org.eclipse.jface.action.IAction; import org.eclipse.jface.dialogs.ErrorDialog; import org.eclipse.jface.viewers.ISelection; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.ui.IObjectActionDelegate; import org.eclipse.ui.IWorkbenchPart; import aQute.bnd.build.Project; import bndtools.Plugin; import bndtools.preferences.BndPreferences; public class ToggleNatureAction implements IObjectActionDelegate { private ISelection selection; private IWorkbenchPart targetPart; /* * (non-Javadoc) * @see org.eclipse.ui.IActionDelegate#run(org.eclipse.jface.action.IAction) */ @Override public void run(IAction action) { if (selection instanceof IStructuredSelection) { for (Iterator<?> it = ((IStructuredSelection) selection).iterator(); it.hasNext();) { Object element = it.next(); IProject project = null; if (element instanceof IProject) { project = (IProject) element; } else if (element instanceof IAdaptable) { project = (IProject) ((IAdaptable) element).getAdapter(IProject.class); } if (project != null) { boolean isJavaProject = false; try { isJavaProject = project.hasNature(JavaCore.NATURE_ID); } catch (CoreException e) { /* swallow */ } if (isJavaProject) { IStatus status = toggleNature(JavaCore.create(project)); if (!status.isOK()) ErrorDialog.openError(targetPart.getSite().getShell(), "Toggle Bnd Nature", null, status); } } } } } /* * (non-Javadoc) * @see org.eclipse.ui.IActionDelegate#selectionChanged(org.eclipse.jface.action .IAction, * org.eclipse.jface.viewers.ISelection) */ @Override public void selectionChanged(IAction action, ISelection selection) { this.selection = selection; } /* * (non-Javadoc) * @see org.eclipse.ui.IObjectActionDelegate#setActivePart(org.eclipse.jface. action.IAction, * org.eclipse.ui.IWorkbenchPart) */ @Override public void setActivePart(IAction action, IWorkbenchPart targetPart) { this.targetPart = targetPart; } private static void ensureBndBndExists(IProject project) throws CoreException { IFile bndfile = project.getFile(Project.BNDFILE); if (!bndfile.exists()) bndfile.create(new ByteArrayInputStream(new byte[0]), false, null); } /** * Toggles sample nature on a project * * @param project to have sample nature added or removed */ private static IStatus toggleNature(IJavaProject project) { try { /* Version control ignores */ VersionControlIgnoresManager versionControlIgnoresManager = Plugin.getDefault() .getVersionControlIgnoresManager(); Set<String> enabledIgnorePlugins = new BndPreferences() .getVersionControlIgnoresPluginsEnabled(versionControlIgnoresManager, project, null); /* Headless build files */ HeadlessBuildManager headlessBuildManager = Plugin.getDefault().getHeadlessBuildManager(); Set<String> enabledPlugins = new BndPreferences().getHeadlessBuildPluginsEnabled(headlessBuildManager, null); IProject iProject = project.getProject(); IProjectDescription description = iProject.getDescription(); String[] natures = description.getNatureIds(); List<String> headlessBuildWarnings = new LinkedList<>(); for (int i = 0; i < natures.length; ++i) { if (BndtoolsConstants.NATURE_ID.equals(natures[i])) { // Remove the nature String[] newNatures = new String[natures.length - 1]; System.arraycopy(natures, 0, newNatures, 0, i); System.arraycopy(natures, i + 1, newNatures, i, natures.length - i - 1); description.setNatureIds(newNatures); iProject.setDescription(description, null); /* Remove the headless build files */ headlessBuildManager.setup(enabledPlugins, false, iProject.getLocation().toFile(), false, enabledIgnorePlugins, headlessBuildWarnings); /* refresh the project; files were created outside of Eclipse API */ iProject.refreshLocal(IResource.DEPTH_INFINITE, null); return createStatus( "Obsolete build files may remain in the project. Please review the messages below.", Collections.<String>emptyList(), headlessBuildWarnings); } } /* Add the headless build files */ headlessBuildManager.setup(enabledPlugins, false, iProject.getLocation().toFile(), true, enabledIgnorePlugins, headlessBuildWarnings); // Add the nature ensureBndBndExists(iProject); String[] newNatures = new String[natures.length + 1]; System.arraycopy(natures, 0, newNatures, 0, natures.length); newNatures[natures.length] = BndtoolsConstants.NATURE_ID; description.setNatureIds(newNatures); iProject.setDescription(description, null); /* refresh the project; files were created outside of Eclipse API */ iProject.refreshLocal(IResource.DEPTH_INFINITE, null); return createStatus("Some build files could not be generated. Please review the messages below.", Collections.<String>emptyList(), headlessBuildWarnings); } catch (CoreException e) { return new Status(IStatus.ERROR, Plugin.PLUGIN_ID, 0, "Error occurred while toggling Bnd project nature", e); } } private static IStatus createStatus(String message, List<String> errors, List<String> warnings) { MultiStatus status = new MultiStatus(Plugin.PLUGIN_ID, 0, message, null); for (String error : errors) status.add(new Status(IStatus.ERROR, Plugin.PLUGIN_ID, 0, error, null)); for (String warning : warnings) status.add(new Status(IStatus.WARNING, Plugin.PLUGIN_ID, 0, warning, null)); return status; } }