feat: Update the implementation to V4 protocol

com.microsoft.java.lsif.core/src/com/microsoft/java/lsif/core/internal/IConstant.java

@@ -16,5 +16,5 @@ private IConstant() {
 
 	public final static String DEFAULT_LSIF_FILE_NAME = "lsif.json";
 
-	public final static String LSIF_FORMAT_VERSION = "0.3.0";
+	public final static String LSIF_FORMAT_VERSION = "0.4.3";
 }

com.microsoft.java.lsif.core/src/com/microsoft/java/lsif/core/internal/indexer/EdgeBuilder.java

@@ -5,11 +5,12 @@
 
 package com.microsoft.java.lsif.core.internal.indexer;
 
+import java.util.Collections;
+import java.util.List;
+
 import com.microsoft.java.lsif.core.internal.protocol.Document;
 import com.microsoft.java.lsif.core.internal.protocol.Edge;
-import com.microsoft.java.lsif.core.internal.protocol.Project;
-import com.microsoft.java.lsif.core.internal.protocol.Range;
-import com.microsoft.java.lsif.core.internal.protocol.ReferenceItem;
+import com.microsoft.java.lsif.core.internal.protocol.ItemEdge;
 import com.microsoft.java.lsif.core.internal.protocol.Vertex;
 
 public class EdgeBuilder {
@@ -20,26 +21,23 @@ public EdgeBuilder(IdGenerator idGenerator) {
 		this.generator = idGenerator;
 	}
 
-	public Edge contains(Project from, Document to) {
-		return new Edge(generator.next(), Edge.CONTAINS, from.getId(), to.getId());
+	public Edge contains(Vertex from, Vertex to) {
+		return new Edge(generator.next(), Edge.CONTAINS, from.getId(), Collections.singletonList(to.getId()));
 	}
 
-	public Edge contains(Document from, Range to) {
-		return new Edge(generator.next(), Edge.CONTAINS, from.getId(), to.getId());
+	public Edge item(Vertex from, Vertex to, Document doc, String property) {
+		return new ItemEdge(generator.next(), Edge.ITEM, from.getId(), Collections.singletonList(to.getId()),
+				doc.getId(), property);
 	}
 
-	public Edge contains(Vertex from, Vertex to) {
-		return new Edge(generator.next(), Edge.CONTAINS, from.getId(), to.getId());
+	public Edge item(Vertex from, List<String> inVs, Document doc, String property) {
+		return new ItemEdge(generator.next(), Edge.ITEM, from.getId(), inVs, doc.getId(), property);
 	}
 
 	public Edge hover(Vertex from, Vertex to) {
 		return new Edge(generator.next(), Edge.T_HOVER, from.getId(), to.getId());
 	}
 
-	public Edge referenceItem(Vertex from, Vertex to, String property) {
-		return new ReferenceItem(generator.next(), Edge.ITEM, from.getId(), to.getId(), property);
-	}
-
 	public Edge definition(Vertex from, Vertex to) {
 		return new Edge(generator.next(), Edge.T_DEFINITION, from.getId(), to.getId());
 	}
@@ -60,8 +58,8 @@ public Edge documentSymbols(Vertex from, Vertex to) {
 		return new Edge(generator.next(), Edge.T_DOCUMENTSYMBOL, from.getId(), to.getId());
 	}
 
-	public Edge refersTo(Vertex from, Vertex to) {
-		return new Edge(generator.next(), Edge.REFERSTO, from.getId(), to.getId());
+	public Edge next(Vertex from, Vertex to) {
+		return new Edge(generator.next(), Edge.NEXT, from.getId(), to.getId());
 	}
 
 	public Edge diagnostic(Vertex from, Vertex to) {

com.microsoft.java.lsif.core/src/com/microsoft/java/lsif/core/internal/indexer/Indexer.java

@@ -26,11 +26,14 @@
 import org.eclipse.jdt.core.JavaCore;
 import org.eclipse.jdt.core.JavaModelException;
 import org.eclipse.jdt.core.dom.CompilationUnit;
+import org.eclipse.jdt.ls.core.internal.BuildWorkspaceStatus;
 import org.eclipse.jdt.ls.core.internal.JavaLanguageServerPlugin;
+import org.eclipse.jdt.ls.core.internal.ResourceUtils;
 import org.eclipse.lsp4j.ClientCapabilities;
 
 import com.microsoft.java.lsif.core.internal.emitter.LsifEmitter;
 import com.microsoft.java.lsif.core.internal.protocol.Document;
+import com.microsoft.java.lsif.core.internal.protocol.Event;
 import com.microsoft.java.lsif.core.internal.protocol.Project;
 import com.microsoft.java.lsif.core.internal.visitors.DiagnosticVisitor;
 import com.microsoft.java.lsif.core.internal.visitors.DocumentVisitor;
@@ -58,10 +61,14 @@ public void generateLsif() throws JavaModelException {
 		LsifService lsif = new LsifService();
 
 		LsifEmitter.getInstance().start();
-		LsifEmitter.getInstance().emit(lsif.getVertexBuilder().metaData());
+		LsifEmitter.getInstance().emit(lsif.getVertexBuilder().metaData(ResourceUtils.fixURI(path.toFile().toURI())));
 
 		handler.importProject(path, monitor);
-		handler.buildProject(monitor);
+		BuildWorkspaceStatus buildStatus = handler.buildProject(monitor);
+		if (buildStatus != BuildWorkspaceStatus.SUCCEED) {
+			return;
+
+		}
 		buildIndex(path, monitor, lsif);
 		handler.removeProject(monitor);
 
@@ -85,10 +92,15 @@ private void buildIndex(IPath path, IProgressMonitor monitor, LsifService lsif)
 
 			Project projVertex = lsif.getVertexBuilder().project();
 			LsifEmitter.getInstance().emit(projVertex);
+			LsifEmitter.getInstance()
+					.emit(lsif.getVertexBuilder().event(Event.EventScope.Project, Event.EventKind.BEGIN,
+							projVertex.getId()));
 
 			List<ICompilationUnit> sourceList = getAllSourceFiles(javaProject);
 
 			dumpParallely(sourceList, threadPool, projVertex, lsif, monitor);
+			LsifEmitter.getInstance().emit(
+					lsif.getVertexBuilder().event(Event.EventScope.Project, Event.EventKind.END, projVertex.getId()));
 		}
 
 		threadPool.shutdown();
@@ -141,6 +153,10 @@ private void dumpParallely(List<ICompilationUnit> sourceList, ExecutorService th
 					DiagnosticVisitor diagnosticVisitor = new DiagnosticVisitor(lsif, context);
 					diagnosticVisitor.enlist();
 
+					LsifEmitter.getInstance()
+							.emit(lsif.getVertexBuilder().event(Event.EventScope.DOCUMENT, Event.EventKind.END,
+									docVertex.getId()));
+
 					return 0;
 				})).blockingSubscribe();
 	}

com.microsoft.java.lsif.core/src/com/microsoft/java/lsif/core/internal/indexer/Repository.java

@@ -11,8 +11,9 @@
 import com.microsoft.java.lsif.core.internal.LsifUtils;
 import com.microsoft.java.lsif.core.internal.emitter.LsifEmitter;
 import com.microsoft.java.lsif.core.internal.protocol.Document;
+import com.microsoft.java.lsif.core.internal.protocol.Event;
 import com.microsoft.java.lsif.core.internal.protocol.Range;
-import com.microsoft.java.lsif.core.internal.protocol.SymbolData;
+import com.microsoft.java.lsif.core.internal.visitors.SymbolData;
 
 public class Repository {
 
@@ -47,6 +48,9 @@ public synchronized Document enlistDocument(LsifService service, String uri) {
 		if (targetDocument == null) {
 			targetDocument = service.getVertexBuilder().document(uri);
 			addDocument(targetDocument);
+			LsifEmitter.getInstance()
+					.emit(service.getVertexBuilder().event(Event.EventScope.DOCUMENT, Event.EventKind.BEGIN,
+							targetDocument.getId()));
 			LsifEmitter.getInstance().emit(targetDocument);
 		}
 
@@ -69,10 +73,10 @@ public Range enlistRange(LsifService service, String uri, org.eclipse.lsp4j.Rang
 		return enlistRange(service, enlistDocument(service, uri), lspRange);
 	}
 
-	public synchronized SymbolData enlistSymbolData(String id) {
+	public synchronized SymbolData enlistSymbolData(String id, Document docVertex) {
 		SymbolData symbolData = findSymbolDataById(id);
 		if (symbolData == null) {
-			symbolData = new SymbolData();
+			symbolData = new SymbolData(docVertex);
 			addSymbolData(id, symbolData);
 		}
 		return symbolData;

com.microsoft.java.lsif.core/src/com/microsoft/java/lsif/core/internal/indexer/VertexBuilder.java

@@ -10,15 +10,14 @@
 import org.eclipse.lsp4j.Diagnostic;
 import org.eclipse.lsp4j.DocumentSymbol;
 import org.eclipse.lsp4j.Hover;
-import org.eclipse.lsp4j.Location;
-import org.eclipse.lsp4j.jsonrpc.messages.Either;
 
 import com.microsoft.java.lsif.core.internal.JdtlsUtils;
 import com.microsoft.java.lsif.core.internal.LsifUtils;
 import com.microsoft.java.lsif.core.internal.protocol.DefinitionResult;
 import com.microsoft.java.lsif.core.internal.protocol.DiagnosticResult;
 import com.microsoft.java.lsif.core.internal.protocol.Document;
 import com.microsoft.java.lsif.core.internal.protocol.DocumentSymbolResult;
+import com.microsoft.java.lsif.core.internal.protocol.Event;
 import com.microsoft.java.lsif.core.internal.protocol.HoverResult;
 import com.microsoft.java.lsif.core.internal.protocol.ImplementationResult;
 import com.microsoft.java.lsif.core.internal.protocol.MetaData;
@@ -36,8 +35,12 @@ public VertexBuilder(IdGenerator generator) {
 		this.generator = generator;
 	}
 
-	public MetaData metaData() {
-		return new MetaData(generator.next());
+	public MetaData metaData(String projectRoot) {
+		return new MetaData(generator.next(), projectRoot);
+	}
+
+	public Event event(String scope, String kind, String data) {
+		return new Event(generator.next(), scope, kind, data);
 	}
 
 	public Project project() {
@@ -60,29 +63,24 @@ public ResultSet resultSet() {
 		return new ResultSet(generator.next());
 	}
 
-	public DefinitionResult definitionResult(String resultId) {
-		return new DefinitionResult(generator.next(), resultId);
+	public DefinitionResult definitionResult() {
+		return new DefinitionResult(generator.next());
 	}
 
 	public HoverResult hoverResult(Hover hover) {
 		return new HoverResult(generator.next(), hover);
 	}
 
-	public TypeDefinitionResult typeDefinitionResult(String resultId) {
-		return new TypeDefinitionResult(generator.next(), resultId);
+	public TypeDefinitionResult typeDefinitionResult() {
+		return new TypeDefinitionResult(generator.next());
 	}
 
 	public ReferenceResult referenceResult() {
 		return new ReferenceResult(generator.next());
 	}
 
-	public ReferenceResult referenceResult(List<String> declarations, List<String> definitions, List<String> references,
-			List<String> referenceResults) {
-		return new ReferenceResult(generator.next(), declarations, definitions, references, referenceResults);
-	}
-
-	public ImplementationResult implementationResult(List<Either<String, Location>> result) {
-		return new ImplementationResult(generator.next(), result);
+	public ImplementationResult implementationResult() {
+		return new ImplementationResult(generator.next());
 	}
 
 	public DocumentSymbolResult documentSymbolResult(List<DocumentSymbol> symbols) {

com.microsoft.java.lsif.core/src/com/microsoft/java/lsif/core/internal/protocol/DefinitionResult.java

@@ -5,19 +5,9 @@
 
 package com.microsoft.java.lsif.core.internal.protocol;
 
-import java.util.Arrays;
-import java.util.List;
-
 public class DefinitionResult extends Vertex {
 
-	private List<String> result;
-
-	public DefinitionResult(String id, String result) {
+	public DefinitionResult(String id) {
 		super(id, Vertex.DEFINITIONRESULT);
-		this.result = Arrays.asList(result);
-	}
-
-	public List<String> getResult() {
-		return this.result;
 	}
 }

com.microsoft.java.lsif.core/src/com/microsoft/java/lsif/core/internal/protocol/Edge.java

@@ -5,13 +5,15 @@
 
 package com.microsoft.java.lsif.core.internal.protocol;
 
+import java.util.List;
+
 public class Edge extends Element {
 
 	public final static String CONTAINS = "contains";
 
 	public final static String ITEM = "item";
 
-	public final static String REFERSTO = "refersTo";
+	public final static String NEXT = "next";
 
 	public final static String EXPORTS = "exports";
 
@@ -41,17 +43,29 @@ public class Edge extends Element {
 
 	private String inV;
 
+	private List<String> inVs;
+
 	public Edge(String id, String label, String outV, String inV) {
 		super(id, Element.EDGE, label);
 		this.outV = outV;
 		this.inV = inV;
 	}
 
+	public Edge(String id, String label, String outV, List<String> inVs) {
+		super(id, Element.EDGE, label);
+		this.outV = outV;
+		this.inVs = inVs;
+	}
+
 	public String getOutV() {
 		return this.outV;
 	}
 
 	public String getInV() {
 		return this.inV;
 	}
+
+	public List<String> getInVs() {
+		return inVs;
+	}
 }

com.microsoft.java.lsif.core/src/com/microsoft/java/lsif/core/internal/protocol/Event.java

@@ -0,0 +1,45 @@
+/* --------------------------------------------------------------------------------------------
+ * Copyright (c) Microsoft Corporation. All rights reserved.
+ * Licensed under the MIT License. See License.txt in the project root for license information.
+ * ------------------------------------------------------------------------------------------ */
+
+
+package com.microsoft.java.lsif.core.internal.protocol;
+
+public class Event extends Vertex {
+
+	private String kind;
+
+	private String scope;
+
+	private String data;
+
+	public Event(String id, String scope, String kind, String data) {
+		super(id, Vertex.EVENT);
+		this.scope = scope;
+		this.kind = kind;
+		this.data = data;
+	}
+
+	public String getScope() {
+		return scope;
+	}
+
+	public String getKind() {
+		return kind;
+	}
+
+	public String getData() {
+		return data;
+	}
+
+	public static class EventScope {
+		public static final String Project = "project";
+		public static final String DOCUMENT = "document";
+	}
+
+	public static class EventKind {
+		public static final String BEGIN = "begin";
+		public static final String END = "end";
+	}
+}

com.microsoft.java.lsif.core/src/com/microsoft/java/lsif/core/internal/protocol/ImplementationResult.java

@@ -5,21 +5,9 @@
 
 package com.microsoft.java.lsif.core.internal.protocol;
 
-import java.util.List;
-
-import org.eclipse.lsp4j.Location;
-import org.eclipse.lsp4j.jsonrpc.messages.Either;
-
 public class ImplementationResult extends Vertex {
 
-	private List<Either<String, Location>> result;
-
-	public ImplementationResult(String id, List<Either<String, Location>> result) {
+	public ImplementationResult(String id) {
 		super(id, Vertex.IMPLEMENTATIONRESULT);
-		this.result = result;
-	}
-
-	public List<Either<String, Location>> getResult() {
-		return this.result;
 	}
 }