Add setMetaInfo to AbstractContextBasedITextEvent

DEVSIX-5664

Author: ar3em

itext/itext.commons/itext/commons/actions/AbstractContextBasedITextEvent.cs

@@ -23,6 +23,7 @@ You should have received a copy of the GNU Affero General Public License
 using System;
 using iText.Commons.Actions.Contexts;
 using iText.Commons.Actions.Data;
+using iText.Commons.Exceptions;
 
 namespace iText.Commons.Actions {
     /// <summary>Represents a context-based event.</summary>
@@ -32,7 +33,7 @@ namespace iText.Commons.Actions {
     /// Only for internal usage.
     /// </remarks>
     public abstract class AbstractContextBasedITextEvent : AbstractProductITextEvent {
-        private readonly IMetaInfo metaInfo;
+        private IMetaInfo metaInfo;
 
         /// <summary>Creates an event containing auxiliary meta data.</summary>
         /// <param name="productData">is a description of the product which has generated an event</param>
@@ -42,16 +43,25 @@ protected internal AbstractContextBasedITextEvent(ProductData productData, IMeta
             this.metaInfo = metaInfo;
         }
 
+        /// <summary>Obtains the current event context class.</summary>
+        /// <returns>context class</returns>
+        public virtual Type GetClassFromContext() {
+            return this.GetType();
+        }
+
+        /// <summary>Sets meta info.</summary>
+        /// <param name="metaInfo">meta info</param>
+        public virtual void SetMetaInfo(IMetaInfo metaInfo) {
+            if (this.metaInfo != null) {
+                throw new InvalidOperationException(CommonsExceptionMessageConstant.META_INFO_SHOULDNT_BE_NULL);
+            }
+            this.metaInfo = metaInfo;
+        }
+
         /// <summary>Obtains stored meta info associated with the event.</summary>
         /// <returns>meta info</returns>
         internal virtual IMetaInfo GetMetaInfo() {
             return metaInfo;
         }
-
-        /// <summary>Obtains a current event context class.</summary>
-        /// <returns>context class</returns>
-        public virtual Type GetClassFromContext() {
-            return this.GetType();
-        }
     }
 }

itext/itext.commons/itext/commons/exceptions/CommonsExceptionMessageConstant.cs

@@ -35,12 +35,16 @@ public sealed class CommonsExceptionMessageConstant {
         /// </description></item>
         /// </list>
         /// </remarks>
-        public const String ELEMENT_ALREADY_HAS_IDENTIFIER = "Element already has sequence id: {0}, new id {1} will be ignored";
+        public const String ELEMENT_ALREADY_HAS_IDENTIFIER = "Element already has sequence id: {0}, new id {1} " +
+             "will be ignored";
 
-        public const String INVALID_USAGE_CONFIGURATION_FORBIDDEN = "Invalid usage of placeholder \"{0}\": any configuration is forbidden";
+        public const String INVALID_USAGE_CONFIGURATION_FORBIDDEN = "Invalid usage of placeholder \"{0}\": any " +
+             "configuration is forbidden";
 
         public const String INVALID_USAGE_FORMAT_REQUIRED = "Invalid usage of placeholder \"{0}\": format is required";
 
+        public const String META_INFO_SHOULDNT_BE_NULL = "Meta info shouldn't be null";
+
         public const String NO_EVENTS_WERE_REGISTERED_FOR_THE_DOCUMENT = "No events were registered for the document!";
 
         public const String PATTERN_CONTAINS_OPEN_QUOTATION = "Pattern contains open quotation!";