TAAS-41: TAAS Document Structure

* added more testFiles
* hacked a workaround for CMMException

layoutparser-service/layoutparser-service-processor/src/main/java/com/knecon/fforesight/service/layoutparser/processor/classification/parsing/PDFLinesTextStripper.java

@@ -1,5 +1,6 @@
 package com.knecon.fforesight.service.layoutparser.processor.classification.parsing;
 
+import java.awt.color.CMMException;
 import java.awt.geom.Point2D;
 import java.io.IOException;
 import java.util.ArrayList;
@@ -31,6 +32,7 @@ import org.apache.pdfbox.cos.COSBase;
 import org.apache.pdfbox.cos.COSNumber;
 import org.apache.pdfbox.pdmodel.PDDocument;
 import org.apache.pdfbox.pdmodel.PDPage;
+import org.apache.pdfbox.pdmodel.graphics.color.PDColor;
 import org.apache.pdfbox.text.TextPosition;
 
 import com.knecon.fforesight.service.layoutparser.processor.classification.model.table.Ruling;
@@ -39,6 +41,7 @@ import com.knecon.fforesight.service.layoutparser.processor.classification.model
 
 import lombok.Getter;
 import lombok.Setter;
+import lombok.SneakyThrows;
 import lombok.extern.slf4j.Slf4j;
 
 @Getter
@@ -194,8 +197,8 @@ public class PDFLinesTextStripper extends PDFTextStripper {
     private void addVisibleRulings(List<Ruling> path, boolean stroke) throws IOException {
 
         try {
-            if (stroke && !getGraphicsState().getStrokingColor().isPattern() && getGraphicsState().getStrokingColor()
+            if (stroke && !getGraphicsState().getStrokingColor().isPattern() && isBlack(getGraphicsState().getStrokingColor()) || //
-                    .toRGB() == 0 || !stroke && !getGraphicsState().getNonStrokingColor().isPattern() && getGraphicsState().getNonStrokingColor().toRGB() == 0) {
+                    !stroke && !getGraphicsState().getNonStrokingColor().isPattern() && isBlack(getGraphicsState().getNonStrokingColor())) {
                 rulings.addAll(path);
             }
         } catch (UnsupportedOperationException e) {
@@ -206,6 +209,21 @@ public class PDFLinesTextStripper extends PDFTextStripper {
     }
 
 
+    @SneakyThrows
+    private boolean isBlack(PDColor color) {
+
+        try {
+            return color.toRGB() == 0;
+        } catch (CMMException e) {
+            // see https://github.com/haraldk/TwelveMonkeys/issues/124 or https://issues.apache.org/jira/browse/PDFBOX-3531
+            // This is a quick and dirt hack
+            // Happens for file 216.pdf
+            log.debug(e.getMessage());
+            return color.getComponents()[0] == 0 && color.getComponents()[1] == 0 && color.getComponents()[2] == 0 && color.getComponents()[1] == 1;
+        }
+    }
+
+
     @Override
     public void writeString(String text, List<TextPosition> textPositions, boolean isParagraphStart) throws IOException {