Add setMetaInfo to AbstractContextBasedITextEvent

DEVSIX-5664

Author: ar3em

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

@@ -24,13 +24,14 @@ This file is part of the iText (R) project.
 
 import com.itextpdf.commons.actions.contexts.IMetaInfo;
 import com.itextpdf.commons.actions.data.ProductData;
+import com.itextpdf.commons.exceptions.CommonsExceptionMessageConstant;
 
 /**
  * Represents a context-based event. See also {@link AbstractContextBasedEventHandler}.
  * Only for internal usage.
  */
 public abstract class AbstractContextBasedITextEvent extends AbstractProductITextEvent {
-    private final IMetaInfo metaInfo;
+    private IMetaInfo metaInfo;
 
     /**
      * Creates an event containing auxiliary meta data.
@@ -44,20 +45,34 @@ protected AbstractContextBasedITextEvent(ProductData productData, IMetaInfo meta
     }
 
     /**
-     * Obtains stored meta info associated with the event.
+     * Obtains the current event context class.
      *
-     * @return meta info
+     * @return context class
      */
-    IMetaInfo getMetaInfo() {
-        return metaInfo;
+    public Class<?> getClassFromContext() {
+        return this.getClass();
     }
 
     /**
-     * Obtains a current event context class.
+     * Sets meta info.
      *
-     * @return context class
+     * @param metaInfo meta info
+     *
+     * @throws IllegalStateException if the current event already has not null meta info associated with it
      */
-    public Class<?> getClassFromContext() {
-        return this.getClass();
+    public void setMetaInfo(IMetaInfo metaInfo) throws IllegalStateException {
+        if (this.metaInfo != null) {
+            throw new IllegalStateException(CommonsExceptionMessageConstant.META_INFO_SHOULDNT_BE_NULL);
+        }
+        this.metaInfo = metaInfo;
+    }
+
+    /**
+     * Obtains stored meta info associated with the event.
+     *
+     * @return meta info
+     */
+    IMetaInfo getMetaInfo() {
+        return metaInfo;
     }
 }

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

@@ -34,14 +34,13 @@ public final class CommonsExceptionMessageConstant {
      * <li>1st is a new element identifier;
      * </ul>
      */
-    public static final String ELEMENT_ALREADY_HAS_IDENTIFIER =
-            "Element already has sequence id: {0}, new id {1} will be ignored";
-    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 NO_EVENTS_WERE_REGISTERED_FOR_THE_DOCUMENT =
-            "No events were registered for the document!";
+    public static final String ELEMENT_ALREADY_HAS_IDENTIFIER = "Element already has sequence id: {0}, new id {1} " +
+            "will be ignored";
+    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}";
     public static final String PATTERN_CONTAINS_UNEXPECTED_COMPONENT = "Pattern contains unexpected component {0}";