Get rid of exception in the AbstractContextBasedITextEvent#setMetaInfo

DEVSIX-5887

Author: ar3em

commons/src/main/java/com/itextpdf/commons/actions/AbstractContextBasedITextEvent.java

@@ -58,13 +58,14 @@ public Class<?> getClassFromContext() {
      *
      * @param metaInfo meta info
      *
-     * @throws IllegalStateException if the current event already has not null meta info associated with it
+     * @return true if meta info has been set, false otherwise
      */
-    public void setMetaInfo(IMetaInfo metaInfo) throws IllegalStateException {
+    public boolean setMetaInfo(IMetaInfo metaInfo) {
         if (this.metaInfo != null) {
-            throw new IllegalStateException(CommonsExceptionMessageConstant.META_INFO_SHOULDNT_BE_NULL);
+            return false;
         }
         this.metaInfo = metaInfo;
+        return true;
     }
 
     /**

commons/src/main/java/com/itextpdf/commons/exceptions/CommonsExceptionMessageConstant.java

@@ -39,7 +39,6 @@ public final class CommonsExceptionMessageConstant {
     public static final String INVALID_USAGE_CONFIGURATION_FORBIDDEN = "Invalid usage of placeholder \"{0}\": any "
             + "configuration is forbidden";
     public static final String INVALID_USAGE_FORMAT_REQUIRED = "Invalid usage of placeholder \"{0}\": format is required";
-    public static final String META_INFO_SHOULDNT_BE_NULL = "Meta info shouldn't be null";
     public static final String NO_EVENTS_WERE_REGISTERED_FOR_THE_DOCUMENT = "No events were registered for the document!";
     public static final String PATTERN_CONTAINS_OPEN_QUOTATION = "Pattern contains open quotation!";
     public static final String PATTERN_CONTAINS_UNEXPECTED_CHARACTER = "Pattern contains unexpected character {0}";

commons/src/test/java/com/itextpdf/commons/actions/AbstractContextBasedITextEventTest.java

@@ -56,8 +56,7 @@ public void resetMetaInfoForbiddenTest() {
 
         Assert.assertSame(metaInfoBefore, e.getMetaInfo());
 
-        Exception exception = Assert.assertThrows(IllegalStateException.class, () -> e.setMetaInfo(metaInfoAfter));
-        Assert.assertEquals(CommonsExceptionMessageConstant.META_INFO_SHOULDNT_BE_NULL, exception.getMessage());
+        Assert.assertFalse(e.setMetaInfo(metaInfoAfter));
     }
 
     private static class BasicAbstractContextBasedITextEvent extends AbstractContextBasedITextEvent {