Don't use not-upstream DOMCodeSelector.isGenerated()

as try to use it can cause exception as long as it's not available

Author: mickaelistria

org.eclipse.jdt.core.javac/src/org/eclipse/jdt/internal/codeassist/DOMCompletionContext.java

@@ -26,6 +26,7 @@
 import org.eclipse.jdt.core.Signature;
 import org.eclipse.jdt.core.compiler.CharOperation;
 import org.eclipse.jdt.core.dom.ASTNode;
+import org.eclipse.jdt.core.dom.ASTVisitor;
 import org.eclipse.jdt.core.dom.AbstractTypeDeclaration;
 import org.eclipse.jdt.core.dom.AnonymousClassDeclaration;
 import org.eclipse.jdt.core.dom.Block;
@@ -38,6 +39,7 @@
 import org.eclipse.jdt.core.dom.ITypeBinding;
 import org.eclipse.jdt.core.dom.IVariableBinding;
 import org.eclipse.jdt.core.dom.ImportDeclaration;
+import org.eclipse.jdt.core.dom.MarkerAnnotation;
 import org.eclipse.jdt.core.dom.MethodDeclaration;
 import org.eclipse.jdt.core.dom.NodeFinder;
 import org.eclipse.jdt.core.dom.NumberLiteral;
@@ -72,7 +74,7 @@ class DOMCompletionContext extends CompletionContext {
 		this.textContent = textContent;
 		this.offset = offset;
 		int adjustedOffset = this.offset;
-		boolean isGenerated = DOMCodeSelector.isGenerated(domUnit);
+		boolean isGenerated = DOMCompletionContext.isGenerated(domUnit);
 		if (!isGenerated) {
 			if (adjustedOffset > 0 && Character.isJavaIdentifierPart(textContent.charAt(adjustedOffset - 1))) {
 				// workaround for cases where right node is empty and reported (wrongly) as starting at same offset
@@ -482,4 +484,27 @@ private static boolean castCompatable(ITypeBinding typeBinding, String sig2) {
 		}
 		return false;
 	}
+
+	/// Checks if the node is generated
+	/// @param node the AST node
+	/// @return `true` if the node is generated.
+	private static boolean isGenerated(ASTNode node) {
+		if (node != null) {
+			boolean[] isGenerated = {false};
+			node.accept(new ASTVisitor() {
+
+				@Override
+				public void endVisit(MarkerAnnotation markerAnnotation) {
+					if (!isGenerated[0]) {
+						// check lombok only for now
+						isGenerated[0] = "lombok.Generated".equals(markerAnnotation.getTypeName().getFullyQualifiedName()); //$NON-NLS-1$
+						super.endVisit(markerAnnotation);
+					}
+				}
+
+			});
+			return isGenerated[0];
+		}
+		return false;
+	}
 }