PDFBOX-5660: use isBlank()

git-svn-id: https://svn.apache.org/repos/asf/pdfbox/trunk@1924728 13f79535-47bb-0310-9956-ffa450edef68

Author: THausherr

examples/src/test/java/org/apache/wink/client/MockHttpServer.java

@@ -294,7 +294,7 @@ private void processRequestHeaders(InputStream is) throws IOException {
             while ((line = readLine(is)) != null) {
                 String lineStr = new String(line);
                 // if there are no more headers
-                if (lineStr.trim().isEmpty()) {
+                if (lineStr.isBlank()) {
                     break;
                 }
                 addRequestHeader(lineStr);

pdfbox/src/main/java/org/apache/pdfbox/util/DateConverter.java

@@ -718,7 +718,7 @@ public static Calendar toCalendar(COSString text)
      */
     public static Calendar toCalendar(String text)
     {
-        if (text == null || text.trim().isEmpty())
+        if (text == null || text.isBlank())
         {
             return null;
         }

pdfbox/src/test/java/org/apache/pdfbox/text/BidiTest.java

@@ -238,8 +238,8 @@ else if( expected != null && actual != null )
         }
         else
         {
-            equals = (expected == null && actual != null && actual.trim().isEmpty())
-                    || (actual == null && expected != null && expected.trim().isEmpty());
+            equals = (expected == null && actual != null && actual.isBlank())
+                    || (actual == null && expected != null && expected.isBlank());
         }
         return equals;
     }

pdfbox/src/test/java/org/apache/pdfbox/text/TestTextStripper.java

@@ -202,8 +202,8 @@ else if( expected != null && actual != null )
         }
         else
         {
-            equals = (expected == null && actual != null && actual.trim().isEmpty())
-                    || (actual == null && expected != null && expected.trim().isEmpty());
+            equals = (expected == null && actual != null && actual.isBlank())
+                    || (actual == null && expected != null && expected.isBlank());
         }
         return equals;
     }

xmpbox/src/main/java/org/apache/xmpbox/DateConverter.java

@@ -85,7 +85,7 @@ private DateConverter()
     public static Calendar toCalendar(String date) throws IOException
     {
         Calendar retval = null;
-        if ((date != null) && (!date.trim().isEmpty()))
+        if ((date != null) && (!date.isBlank()))
         {
             date = date.trim();
 

xmpbox/src/main/java/org/apache/xmpbox/xml/DomXmpParser.java

@@ -868,7 +868,7 @@ private void removeComments(Node root)
             }
             else if (node instanceof Text)
             {
-                if (node.getTextContent().trim().isEmpty())
+                if (node.getTextContent().isBlank())
                 {
                     // TODO: verify why this is necessary
                     // empty text nodes to be deleted