| /******************************************************************************* |
| * Copyright (c) 2000, 2017 IBM Corporation and others. |
| * 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 |
| * |
| *******************************************************************************/ |
| package org.eclipse.dltk.internal.core; |
| |
| import java.util.HashSet; |
| |
| import org.eclipse.core.resources.IProject; |
| import org.eclipse.core.resources.IProjectDescription; |
| import org.eclipse.core.resources.IResource; |
| import org.eclipse.core.resources.IWorkspace; |
| import org.eclipse.core.resources.IWorkspaceRoot; |
| import org.eclipse.core.resources.IWorkspaceRunnable; |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.core.runtime.jobs.ISchedulingRule; |
| import org.eclipse.dltk.compiler.CharOperation; |
| import org.eclipse.dltk.core.IBuildpathEntry; |
| import org.eclipse.dltk.core.ModelException; |
| import org.eclipse.dltk.internal.core.util.Util; |
| |
| public class ProjectReferenceChange { |
| |
| private ScriptProject project; |
| private IBuildpathEntry[] oldResolvedBuildpath; |
| |
| public ProjectReferenceChange(ScriptProject project, |
| IBuildpathEntry[] oldResolvedBuildpath) { |
| this.project = project; |
| this.oldResolvedBuildpath = oldResolvedBuildpath; |
| } |
| |
| /* |
| * Update projects references so that the build order is consistent with the |
| * buildpath |
| */ |
| public void updateProjectReferencesIfNecessary() throws ModelException { |
| if (!project.getProject().isAccessible()) |
| return; |
| String[] oldRequired = this.oldResolvedBuildpath == null |
| ? CharOperation.NO_STRINGS |
| : this.project.projectPrerequisites(this.oldResolvedBuildpath); |
| IBuildpathEntry[] newResolvedBuildpath = this.project |
| .getResolvedBuildpath(); |
| String[] newRequired = this.project |
| .projectPrerequisites(newResolvedBuildpath); |
| final IProject projectResource = this.project.getProject(); |
| try { |
| IProjectDescription description = projectResource.getDescription(); |
| |
| IProject[] projectReferences = description.getDynamicReferences(); |
| |
| HashSet<String> oldReferences = new HashSet<>( |
| projectReferences.length); |
| for (int i = 0; i < projectReferences.length; i++) { |
| String projectName = projectReferences[i].getName(); |
| oldReferences.add(projectName); |
| } |
| @SuppressWarnings("unchecked") |
| HashSet<String> newReferences = (HashSet<String>) oldReferences |
| .clone(); |
| |
| for (int i = 0; i < oldRequired.length; i++) { |
| String projectName = oldRequired[i]; |
| newReferences.remove(projectName); |
| } |
| for (int i = 0; i < newRequired.length; i++) { |
| String projectName = newRequired[i]; |
| newReferences.add(projectName); |
| } |
| |
| int newSize = newReferences.size(); |
| |
| checkIdentity: { |
| if (oldReferences.size() == newSize) { |
| for (String newRef : newReferences) { |
| if (!oldReferences.contains(newRef)) { |
| break checkIdentity; |
| } |
| } |
| return; |
| } |
| } |
| String[] requiredProjectNames = new String[newSize]; |
| int index = 0; |
| for (String newRef : newReferences) { |
| requiredProjectNames[index++] = newRef; |
| } |
| Util.sort(requiredProjectNames); // ensure that if changed, the |
| // order is consistent |
| |
| final IProject[] requiredProjectArray = new IProject[newSize]; |
| IWorkspaceRoot wksRoot = projectResource.getWorkspace().getRoot(); |
| for (int i = 0; i < newSize; i++) { |
| requiredProjectArray[i] = wksRoot |
| .getProject(requiredProjectNames[i]); |
| } |
| |
| // ensure that a scheduling rule is used so that the project |
| // description is not modified by another thread while we update it |
| // see https://bugs.eclipse.org/bugs/show_bug.cgi?id=214981 |
| // also ensure that if no change (checkIdentify block returned |
| // above) we don't reach here |
| // see https://bugs.eclipse.org/bugs/show_bug.cgi?id=241751 |
| IWorkspace workspace = projectResource.getWorkspace(); |
| ISchedulingRule rule = workspace.getRuleFactory() |
| .modifyRule(projectResource); // scheduling rule for |
| // modifying the |
| // project |
| IWorkspaceRunnable runnable = monitor -> { |
| IProjectDescription description1 = projectResource |
| .getDescription(); |
| description1.setDynamicReferences(requiredProjectArray); |
| projectResource.setDescription(description1, |
| IResource.AVOID_NATURE_CONFIG, null); |
| }; |
| workspace.run(runnable, rule, IWorkspace.AVOID_UPDATE, null); |
| } catch (CoreException e) { |
| if (!ExternalScriptProject.EXTERNAL_PROJECT_NAME |
| .equals(this.project.getElementName())) |
| throw new ModelException(e); |
| } |
| } |
| } |