Java IJavaProject.exists方法代碼示例

import org.eclipse.jdt.core.IJavaProject; //導入方法依賴的package包/類
private static ISourceContainer[] getSourceContainers(IJavaProject project, Set<IRuntimeClasspathEntry> calculated) {
    if (project == null || !project.exists()) {
        return new ISourceContainer[0];
    }

    try {
        IRuntimeClasspathEntry[] unresolved = JavaRuntime.computeUnresolvedRuntimeClasspath(project);
        List<IRuntimeClasspathEntry> resolved = new ArrayList<>();
        for (IRuntimeClasspathEntry entry : unresolved) {
            for (IRuntimeClasspathEntry resolvedEntry : JavaRuntime.resolveRuntimeClasspathEntry(entry, project)) {
                if (!calculated.contains(resolvedEntry)) {
                    calculated.add(resolvedEntry);
                    resolved.add(resolvedEntry);
                }
            }
        }
        Set<ISourceContainer> containers = new LinkedHashSet<>();
        containers.addAll(Arrays.asList(
                JavaRuntime.getSourceContainers(resolved.toArray(new IRuntimeClasspathEntry[0]))));

        // Due to a known jdt java 9 support bug https://bugs.eclipse.org/bugs/show_bug.cgi?id=525840,
        // it would miss some JRE libraries source containers when the debugger is running on JDK9.
        // As a workaround, recompute the possible source containers for JDK9 jrt-fs.jar libraries.
        IRuntimeClasspathEntry jrtFs = resolved.stream().filter(entry -> {
            return entry.getType() == IRuntimeClasspathEntry.ARCHIVE && entry.getPath().lastSegment().equals("jrt-fs.jar");
        }).findFirst().orElse(null);
        if (jrtFs != null && project.isOpen()) {
            IPackageFragmentRoot[] allRoots = project.getPackageFragmentRoots();
            for (IPackageFragmentRoot root : allRoots) {
                if (root.getPath().equals(jrtFs.getPath()) && isSourceAttachmentEqual(root, jrtFs)) {
                    containers.add(new PackageFragmentRootSourceContainer(root));
                }
            }
        }

        return containers.toArray(new ISourceContainer[0]);
    } catch (CoreException ex) {
     // do nothing.
    }

    return new ISourceContainer[0];
}
 

import org.eclipse.jdt.core.IJavaProject; //導入方法依賴的package包/類
protected IStatus packageChanged() {
	StatusInfo status = new StatusInfo();
	IPackageFragmentRoot root = getPackageFragmentRoot();
	IJavaProject project = root != null ? root.getJavaProject() : null;

	String packName = getPackageText().getText();
	if (packName.length() > 0) {
		IStatus val = validatePackageName(packName, project);
		if (val.getSeverity() == IStatus.ERROR) {
			status.setError(Messages.format(NewWizardMessages.NewTypeWizardPage_error_InvalidPackageName, val.getMessage()));
			return status;
		} else if (val.getSeverity() == IStatus.WARNING) {
			status.setWarning(Messages.format(NewWizardMessages.NewTypeWizardPage_warning_DiscouragedPackageName, val.getMessage()));
			// continue
		}
	} else {
		status.setWarning(NewWizardMessages.NewTypeWizardPage_warning_DefaultPackageDiscouraged);
	}

	if (project != null) {
		if (project.exists() && packName.length() > 0) {
			try {
				IPath rootPath = root.getPath();
				IPath outputPath = project.getOutputLocation();
				if (rootPath.isPrefixOf(outputPath) && !rootPath.equals(outputPath)) {
					// if the bin folder is inside of our root, don't allow
					// to name a package
					// like the bin folder
					IPath packagePath = rootPath.append(packName.replace('.', '/'));
					if (outputPath.isPrefixOf(packagePath)) {
						status.setError(NewWizardMessages.NewTypeWizardPage_error_ClashOutputLocation);
						return status;
					}
				}
			} catch (JavaModelException e) {
				JavaPlugin.log(e);
				// let pass
			}
		}

		fCurrPackage = root.getPackageFragment(packName);
		IResource resource = fCurrPackage.getResource();
		if (resource != null) {
			if (resource.isVirtual()) {
				status.setError(NewWizardMessages.NewTypeWizardPage_error_PackageIsVirtual);
				return status;
			}
			if (!ResourcesPlugin.getWorkspace().validateFiltered(resource).isOK()) {
				status.setError(NewWizardMessages.NewTypeWizardPage_error_PackageNameFiltered);
				return status;
			}
		}
	} else {
		status.setError("");
	}
	return status;
}
 

import org.eclipse.jdt.core.IJavaProject; //導入方法依賴的package包/類
private static IStatus validatePackageName(String text, IJavaProject project) {
	if (project == null || !project.exists()) {
		return JavaConventions.validatePackageName(text, JavaCore.VERSION_1_3, JavaCore.VERSION_1_3);
	}
	return JavaConventionsUtil.validatePackageName(text, project);
}