Index: src/java/org/apache/poi/util/Units.java
===================================================================
--- src/java/org/apache/poi/util/Units.java	(revisi¢n: 1655973)
+++ src/java/org/apache/poi/util/Units.java	(copia de trabajo)
@@ -26,11 +26,20 @@
     /**
      * Converts points to EMUs
      * @param points points
-     * @return emus
+     * @return EMUs
      */
     public static int toEMU(double points){
         return (int)Math.round(EMU_PER_POINT*points);
     }
+    
+    /**
+     * Converts pixels to EMUs
+     * @param pixels pixels
+     * @return EMUs
+     */
+    public static int pixelToEMU(int pixels) {
+        return pixels*EMU_PER_PIXEL;
+    }
 
     /**
      * Converts EMUs to points
Index: src/ooxml/java/org/apache/poi/xwpf/usermodel/XWPFDocument.java
===================================================================
--- src/ooxml/java/org/apache/poi/xwpf/usermodel/XWPFDocument.java	(revisi¢n: 1655973)
+++ src/ooxml/java/org/apache/poi/xwpf/usermodel/XWPFDocument.java	(copia de trabajo)
@@ -330,7 +330,7 @@
      */
     @Override
     public XWPFTable getTableArray(int pos) {
-        if (pos > 0 && pos < tables.size()){
+        if (pos >= 0 && pos < tables.size()){
             return tables.get(pos);
         }
         return null;
@@ -345,7 +345,10 @@
     }
 
     public XWPFFooter getFooterArray(int pos){
-        return footers.get(pos);
+        if(pos >=0 && pos < footers.size()) {
+            return footers.get(pos);
+        }
+        return null;
     }
 
     /**
@@ -357,7 +360,10 @@
     }
 
     public XWPFHeader getHeaderArray(int pos){
-        return headers.get(pos);
+        if(pos >=0 && pos < headers.size()) {
+            return headers.get(pos);
+        }
+        return null;
     }
 
     public String getTblStyle(XWPFTable table){
Index: src/ooxml/java/org/apache/poi/xwpf/usermodel/XWPFFootnote.java
===================================================================
--- src/ooxml/java/org/apache/poi/xwpf/usermodel/XWPFFootnote.java	(revisi¢n: 1655973)
+++ src/ooxml/java/org/apache/poi/xwpf/usermodel/XWPFFootnote.java	(copia de trabajo)
@@ -111,7 +111,7 @@
      * @see org.apache.poi.xwpf.usermodel.IBody#getTableArray(int)
      */
     public XWPFTable getTableArray(int pos) {
-        if(pos > 0 && pos < tables.size()){
+        if(pos >= 0 && pos < tables.size()){
             return tables.get(pos);
         }
         return null;
@@ -177,8 +177,10 @@
      * @see org.apache.poi.xwpf.usermodel.IBody#getParagraphArray(int pos)
      */
     public XWPFParagraph getParagraphArray(int pos) {
-
-        return paragraphs.get(pos);
+        if(pos >=0 && pos < paragraphs.size()) {
+            return paragraphs.get(pos);
+        }
+        return null;
     }
 
     /**
@@ -206,7 +208,7 @@
             return null;
         }
         XWPFTableRow tableRow = table.getRow(row);
-        if(row == null){
+        if(tableRow == null){
             return null;
         }
         return tableRow.getTableCell(cell);
Index: src/ooxml/java/org/apache/poi/xwpf/usermodel/XWPFHeaderFooter.java
===================================================================
--- src/ooxml/java/org/apache/poi/xwpf/usermodel/XWPFHeaderFooter.java	(revisi¢n: 1655973)
+++ src/ooxml/java/org/apache/poi/xwpf/usermodel/XWPFHeaderFooter.java	(copia de trabajo)
@@ -203,8 +203,10 @@
      *  the text of the header or footer.
      */
     public XWPFParagraph getParagraphArray(int pos) {
-
-        return paragraphs.get(pos);
+        if(pos >= 0 && pos<paragraphs.size()){
+            return paragraphs.get(pos);
+        }
+        return null;
     }
 
     /**
@@ -425,7 +427,7 @@
      */
     public XWPFTable getTableArray(int pos) {
 
-        if(pos > 0 && pos < tables.size()){
+        if(pos >= 0 && pos < tables.size()){
             return tables.get(pos);
         }
         return null;
Index: src/ooxml/java/org/apache/poi/xwpf/usermodel/XWPFTableCell.java
===================================================================
--- src/ooxml/java/org/apache/poi/xwpf/usermodel/XWPFTableCell.java	(revisi¢n: 1655973)
+++ src/ooxml/java/org/apache/poi/xwpf/usermodel/XWPFTableCell.java	(copia de trabajo)
@@ -340,7 +340,7 @@
      * @see org.apache.poi.xwpf.usermodel.IBody#getParagraphArray(int)
      */
     public XWPFParagraph getParagraphArray(int pos) {
-	if(pos > 0 && pos < paragraphs.size()){
+	if(pos >= 0 && pos < paragraphs.size()){
 	    return paragraphs.get(pos);
 	}
 	return null;
@@ -379,7 +379,7 @@
      * @see org.apache.poi.xwpf.usermodel.IBody#getTableArray(int)
      */
     public XWPFTable getTableArray(int pos) {
-	if(pos > 0 && pos < tables.size()){
+	if(pos >= 0 && pos < tables.size()){
 	    return tables.get(pos);
 	}
 	return null;
Index: src/ooxml/testcases/org/apache/poi/xwpf/usermodel/TestXWPFBugs.java
===================================================================
--- src/ooxml/testcases/org/apache/poi/xwpf/usermodel/TestXWPFBugs.java	(revisi¢n: 1655973)
+++ src/ooxml/testcases/org/apache/poi/xwpf/usermodel/TestXWPFBugs.java	(copia de trabajo)
@@ -20,6 +20,7 @@
 
 import java.io.IOException;
 
+import org.apache.poi.util.Units;
 import org.apache.poi.xwpf.XWPFTestDataSamples;
 import org.apache.poi.xwpf.usermodel.XWPFRun.FontCharRange;
 import org.junit.Test;
@@ -77,4 +78,37 @@
             } 
         }
     }
+    @Test
+    public void bug57495_getTableArrayInDoc() {
+        XWPFDocument doc =new XWPFDocument();
+        //let's create a few tables for the test
+        for(int i=0;i<3;i++) {
+            doc.createTable(2, 2);
+        }
+        XWPFTable table = doc.getTableArray(0);
+        assertNotNull(table);
+        //let's check also that returns the correct table
+        XWPFTable same = doc.getTables().get(0);
+        assertEquals(table, same);
+    }
+    @Test
+    public void bug57495_getParagraphArrayInTableCell() {
+        XWPFDocument doc =new XWPFDocument();
+        //let's create a table for the test
+        XWPFTable table = doc.createTable(2, 2);       
+        assertNotNull(table);
+        XWPFParagraph p = table.getRow(0).getCell(0).getParagraphArray(0);
+        assertNotNull(p);
+        //let's check also that returns the correct paragraph
+        XWPFParagraph same = table.getRow(0).getCell(0).getParagraphs().get(0);        
+        assertEquals(p, same);
+    }
+    
+    @Test
+    public void bug57495_convertPixelsToEMUs() {
+        int pixels= 100;
+        int expectedEMU=952500;
+        int result = Units.pixelToEMU(pixels);
+        assertEquals(expectedEMU, result);
+    }
 }