diff --git a/org.eclipse.lsp4j.generator/src/main/java/org/eclipse/lsp4j/generator/JsonRpcDataProcessor.xtend b/org.eclipse.lsp4j.generator/src/main/java/org/eclipse/lsp4j/generator/JsonRpcDataProcessor.xtend
index ce296a79..f7e4bb71 100644
--- a/org.eclipse.lsp4j.generator/src/main/java/org/eclipse/lsp4j/generator/JsonRpcDataProcessor.xtend
+++ b/org.eclipse.lsp4j.generator/src/main/java/org/eclipse/lsp4j/generator/JsonRpcDataProcessor.xtend
@@ -11,6 +11,8 @@
  ******************************************************************************/
 package org.eclipse.lsp4j.generator
 
+import com.google.common.base.MoreObjects
+import com.google.gson.annotations.JsonAdapter
 import org.eclipse.lsp4j.jsonrpc.validation.NonNull
 import org.eclipse.xtend.lib.annotations.AccessorsProcessor
 import org.eclipse.xtend.lib.annotations.EqualsHashCodeProcessor
@@ -22,8 +24,6 @@ import org.eclipse.xtend.lib.macro.declaration.MutableClassDeclaration
 import org.eclipse.xtend.lib.macro.declaration.MutableFieldDeclaration
 import org.eclipse.xtend.lib.macro.declaration.Type
 import org.eclipse.xtend.lib.macro.declaration.Visibility
-import org.eclipse.xtext.xbase.lib.util.ToStringBuilder
-import com.google.gson.annotations.JsonAdapter
 
 class JsonRpcDataProcessor extends AbstractClassProcessor {
 
@@ -44,7 +44,12 @@ class JsonRpcDataProcessor extends AbstractClassProcessor {
 		val fields = impl.declaredFields.filter[!static]
 		equalsHashCodeUtil.addEquals(impl, fields, shouldIncludeSuper)
 		equalsHashCodeUtil.addHashCode(impl, fields, shouldIncludeSuper)
-
+		impl.getDeclaredMethods.forEach [ method | 
+			val purified = method.findAnnotation(Pure.findTypeGlobally)
+			if (purified !== null) {
+				method.removeAnnotation(purified)
+			}
+		]
 		return impl
 	}
 
@@ -154,10 +159,9 @@ class JsonRpcDataProcessor extends AbstractClassProcessor {
 		impl.addMethod("toString") [
 			returnType = string
 			addAnnotation(newAnnotationReference(Override))
-			addAnnotation(newAnnotationReference(Pure))
 			val accessorsUtil = new AccessorsProcessor.Util(context)
 			body = '''
-				«ToStringBuilder» b = new «ToStringBuilder»(this);
+				«MoreObjects.ToStringHelper» b = «MoreObjects».toStringHelper(this);
 				«FOR field : toStringFields»
 					b.add("«field.simpleName»", «IF field.declaringType == impl»this.«field.simpleName»«ELSE»«
 						accessorsUtil.getGetterName(field)»()«ENDIF»);
diff --git a/org.eclipse.lsp4j/src/main/java/org/eclipse/lsp4j/Protocol.xtend b/org.eclipse.lsp4j/src/main/java/org/eclipse/lsp4j/Protocol.xtend
index 5da70ae6..91db76ff 100644
--- a/org.eclipse.lsp4j/src/main/java/org/eclipse/lsp4j/Protocol.xtend
+++ b/org.eclipse.lsp4j/src/main/java/org/eclipse/lsp4j/Protocol.xtend
@@ -3636,7 +3636,7 @@ class FormattingOptions extends LinkedHashMap<String, Either3<String, Number, Bo
 	 */
 	@Deprecated
 	def Map<String, String> getProperties() {
-		val properties = newLinkedHashMap
+		val properties = new LinkedHashMap<String,String>
 		for (entry : entrySet) {
 			val value = switch it: entry.value {
 				case isFirst: getFirst
diff --git a/org.eclipse.lsp4j/src/main/java/org/eclipse/lsp4j/adapters/HoverTypeAdapter.xtend b/org.eclipse.lsp4j/src/main/java/org/eclipse/lsp4j/adapters/HoverTypeAdapter.xtend
index 94ddde3b..00d91ebc 100644
--- a/org.eclipse.lsp4j/src/main/java/org/eclipse/lsp4j/adapters/HoverTypeAdapter.xtend
+++ b/org.eclipse.lsp4j/src/main/java/org/eclipse/lsp4j/adapters/HoverTypeAdapter.xtend
@@ -24,6 +24,7 @@ import org.eclipse.lsp4j.MarkedString
 import org.eclipse.lsp4j.MarkupContent
 import org.eclipse.lsp4j.generator.TypeAdapterImpl
 import org.eclipse.lsp4j.jsonrpc.messages.Either
+import java.util.ArrayList
 
 /**
  * A type adapter for the Hover protocol type.
@@ -37,7 +38,8 @@ class HoverTypeAdapter {
 	protected def readContents(JsonReader in) throws IOException {
 		val nextToken = in.peek()
 		if (nextToken == JsonToken.STRING) {
-			val List<Either<String, MarkedString>> value = newArrayList(Either.forLeft(in.nextString))
+			val List<Either<String, MarkedString>> value = new ArrayList<Either<String, MarkedString>>()
+			value.add(Either.forLeft(in.nextString))
 			return Either.forLeft(value)
 		} else if (nextToken == JsonToken.BEGIN_ARRAY) {
 			val value = gson.fromJson(in, LIST_STRING_MARKEDSTRING.type)
@@ -45,7 +47,8 @@ class HoverTypeAdapter {
 		} else {
 			val object = JsonParser.parseReader(in) as JsonObject
 			if (object.has("language")) {
-				val List<Either<String, MarkedString>> value = newArrayList(Either.forRight(gson.fromJson(object, MarkedString)))
+				val List<Either<String, MarkedString>> value = new ArrayList<Either<String, MarkedString>>()
+				value.add(Either.forRight(gson.fromJson(object, MarkedString)))
 				return Either.forLeft(value)
 			} else {
 				return Either.forRight(gson.fromJson(object, MarkupContent))