FOP-2901: NoSuchElementException on empty table footer

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@1872773 13f79535-47bb-0310-9956-ffa450edef68

fop-core/src/main/java/org/apache/fop/layoutmgr/table/TableContentLayoutManager.java

@@ -328,13 +328,15 @@ public class TableContentLayoutManager implements PercentBaseContext {
          * represent the content. In such a case the break is simply disabled by setting
          * its penalty to infinite.
          */
-        ListIterator elemIter = returnList.listIterator(returnList.size());
-        ListElement elem = (ListElement) elemIter.previous();
-        if (elem instanceof KnuthGlue) {
-            BreakElement breakElement = (BreakElement) elemIter.previous();
-            breakElement.setPenaltyValue(KnuthElement.INFINITE);
-        } else {
-            elemIter.remove();
+        if (!returnList.isEmpty()) {
+            ListIterator elemIter = returnList.listIterator(returnList.size());
+            ListElement elem = (ListElement) elemIter.previous();
+            if (elem instanceof KnuthGlue) {
+                BreakElement breakElement = (BreakElement) elemIter.previous();
+                breakElement.setPenaltyValue(KnuthElement.INFINITE);
+            } else {
+                elemIter.remove();
+            }
         }
         context.updateKeepWithPreviousPending(keepWithPrevious);
         context.setBreakBefore(breakBefore);
@@ -483,7 +485,7 @@ public class TableContentLayoutManager implements PercentBaseContext {
         tableLM.repeatAddAreasForSavedTableHeaderTableCellLayoutManagers();
         atLeastOnce = true;
 
-        if (footerElements != null) {
+        if (footerElements != null && !footerElements.isEmpty()) {
             boolean ancestorTreatAsArtifact = layoutContext.treatAsArtifact();
             layoutContext.setTreatAsArtifact(treatFooterAsArtifact);
             //Positions for footers are simply added at the end

fop/test/layoutengine/standard-testcases/table_empty_footer.xml

@@ -0,0 +1,67 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  Licensed to the Apache Software Foundation (ASF) under one or more
+  contributor license agreements.  See the NOTICE file distributed with
+  this work for additional information regarding copyright ownership.
+  The ASF licenses this file to You under the Apache License, Version 2.0
+  (the "License"); you may not use this file except in compliance with
+  the License.  You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+-->
+<!-- $Id$ -->
+<testcase>
+  <info>
+    <p>
+      This test checks basic tables.
+    </p>
+  </info>
+  <cfg>
+    <strict-validation>false</strict-validation>
+  </cfg>  
+  <fo>
+<fo:root xmlns:fo="http://www.w3.org/1999/XSL/Format">
+   <fo:layout-master-set>
+    <fo:simple-page-master master-name="simple" page-height="27.9cm" page-width="21.6cm">
+      <fo:region-body />
+    </fo:simple-page-master>
+  </fo:layout-master-set>
+
+  <fo:page-sequence master-reference="simple">
+    <fo:flow flow-name="xsl-region-body">
+      <fo:block>
+        <fo:table border-collapse="separate" table-layout="fixed">
+          <fo:table-column column-width="2in" column-number="1"/>
+          <fo:table-header>
+            <fo:table-row>
+              <fo:table-cell>
+                <fo:block>a</fo:block>
+              </fo:table-cell>
+            </fo:table-row>
+          </fo:table-header>
+          <fo:table-body>
+            <fo:table-row>
+              <fo:table-cell>
+                <fo:block>b</fo:block>
+              </fo:table-cell>
+            </fo:table-row>
+          </fo:table-body>
+          <fo:table-footer/>
+        </fo:table>
+
+      </fo:block>
+
+    </fo:flow>
+  </fo:page-sequence>
+</fo:root>   
+  </fo>
+  <checks>
+    <eval expected="a" xpath="//word[1]"/>
+  </checks>
+</testcase>