1 files changed, 171 insertions, 0 deletions
diff --git a/plugins/org.eclipse.etrice.core.common.ui/src/org/eclipse/etrice/core/common/ui/modelpath/ModelPathDescription.java b/plugins/org.eclipse.etrice.core.common.ui/src/org/eclipse/etrice/core/common/ui/modelpath/ModelPathDescription.java
new file mode 100644
index 000000000..380365055
--- /dev/null
+++ b/plugins/org.eclipse.etrice.core.common.ui/src/org/eclipse/etrice/core/common/ui/modelpath/ModelPathDescription.java
@@ -0,0 +1,171 @@
+/*******************************************************************************
+ * Copyright (c) 2019 protos software gmbh (http://www.protos.de).
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License 2.0
+ * which accompanies this distribution, and is available at
+ * https://www.eclipse.org/legal/epl-2.0/
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ * 
+ * CONTRIBUTORS:
+ * 		Jan Belle (initial contribution)
+ * 
+ *******************************************************************************/
+
+package org.eclipse.etrice.core.common.ui.modelpath;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.UncheckedIOException;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import org.eclipse.core.resources.IFile;
+import org.eclipse.core.resources.IFolder;
+import org.eclipse.core.resources.IMarker;
+import org.eclipse.core.resources.IProject;
+import org.eclipse.core.resources.IResource;
+import org.eclipse.core.resources.IWorkspaceRoot;
+import org.eclipse.core.resources.ResourcesPlugin;
+import org.eclipse.core.runtime.CoreException;
+import org.eclipse.core.runtime.Path;
+
+/**
+ * Represent a modelpath description.
+ */
+public class ModelPathDescription {
+	
+	private final List<IFolder> sourceDirectories;
+	private final List<IProject> projectDependencies;
+	
+	private ModelPathDescription(List<IFolder> sourceDirectories, List<IProject> projectDependencies) {
+		this.sourceDirectories = sourceDirectories;
+		this.projectDependencies = projectDependencies;
+	}
+	
+	/**
+	 * @return the list of source directories
+	 */
+	public List<IFolder> getSourceDirectories() {
+		return sourceDirectories;
+	}
+	
+	/**
+	 * @return the list of project dependencies
+	 */
+	public List<IProject> getProjectDependencies() {
+		return projectDependencies;
+	}
+	
+	/**
+	 * Loads the modelpath description from a file.
+	 * 
+	 * @param file the file to load from
+	 * @return the loaded modelpath description
+	 * 
+	 * @throws CoreException if the file doesn't exist or is out of sync
+	 * @throws UncheckedIOException if an io exception occurs
+	 */
+	public static ModelPathDescription load(IFile file) throws CoreException {
+		try {
+			return new ModelPathDescriptionLoader(file).load();
+		}
+		catch(IOException e) {
+			throw new UncheckedIOException(e);
+		}
+	}
+	
+	/**
+	 * Helper class to parse and validate modelpath description files.
+	 */
+	private static class ModelPathDescriptionLoader {
+		
+		private static final String KEYWORD_SRCDIR = "srcDir";
+		private static final String KEYWORD_PROJECT = "project";
+		private static final Pattern KEYWORD_PATTERN = Pattern.compile("\\S+");
+		
+		private IFile file;
+		private IProject project;
+		private IWorkspaceRoot root;
+		private List<IFolder> srcDirs;
+		private List<IProject> projects;
+		private int lineNumber;
+		
+		public ModelPathDescriptionLoader(IFile file) {
+			this.file = file;
+			project = file.getProject();
+			root = ResourcesPlugin.getWorkspace().getRoot();
+			srcDirs = new ArrayList<>();
+			projects = new ArrayList<>();
+			lineNumber = 0;
+		}
+		
+		public ModelPathDescription load() throws CoreException, IOException {
+			file.deleteMarkers(IMarker.PROBLEM, false, IResource.DEPTH_ZERO);
+			
+			try(BufferedReader reader = new BufferedReader(new InputStreamReader(file.getContents()))) {
+				for(String line = reader.readLine(); line != null; line = reader.readLine(), lineNumber++) {
+					parseLine(line);
+				}
+			}
+			
+			return new ModelPathDescription(Collections.unmodifiableList(srcDirs), Collections.unmodifiableList(projects));
+		}
+		
+		private void parseLine(String line) throws CoreException {
+			Matcher matcher = KEYWORD_PATTERN.matcher(line);
+			if(matcher.find()) {
+				String keyword = matcher.group();
+				String str = line.substring(matcher.end()).trim();
+				
+				switch(keyword) {
+				case KEYWORD_SRCDIR:
+					parseSrcDir(str);
+					break;
+				case KEYWORD_PROJECT:
+					parseProject(str);
+					break;
+				default:
+					createProblemMarker(IMarker.SEVERITY_ERROR, "unexpected keyword " + keyword);
+				}
+			}
+		}
+		
+		private void parseSrcDir(String str) throws CoreException {
+			if(Path.EMPTY.isValidPath(str)) {
+				IFolder dir = project.getFolder(str);
+				if(!dir.exists()) {
+					createProblemMarker(IMarker.SEVERITY_WARNING, "directory " + dir.getFullPath() + " doesn't exist");
+				}
+				srcDirs.add(dir);
+			}
+			else {
+				createProblemMarker(IMarker.SEVERITY_ERROR, str + " isn't a valid path");
+			}
+		}
+		
+		private void parseProject(String str) throws CoreException {
+			if(Path.EMPTY.isValidSegment(str)) {
+				IProject project = root.getProject(str);
+				if(!project.isAccessible()) {
+					createProblemMarker(IMarker.SEVERITY_WARNING, "project " + project.getName() + " doesn't exist");
+				}
+				projects.add(project);
+			}
+			else {
+				createProblemMarker(IMarker.SEVERITY_ERROR, str + " isn't a valid project name");
+			}
+		}
+		
+		private void createProblemMarker(int severity, String message) throws CoreException {
+			IMarker marker = file.createMarker(IMarker.PROBLEM);
+			marker.setAttribute(IMarker.SEVERITY, severity);
+			marker.setAttribute(IMarker.LINE_NUMBER, lineNumber + 1);
+			marker.setAttribute(IMarker.MESSAGE, message);
+		}
+	}
+}
+\ No newline at end of file