Temporary deserialization bug fix for extension operations

extensions/wikidata/src/org/openrefine/wikidata/operations/PerformWikibaseEditsOperation.java

@@ -76,6 +76,28 @@ public class PerformWikibaseEditsOperation extends EngineDependentOperation {
         this.summary = summary;
     }
     
+    /* The constructor above should be enough for deserialization,
+     * but for some unknown reason it can fail in certain cases
+     * (might be due to caching deserializers across threads?)
+     * 
+     * So we sadly add a default constructor and a setter below.
+     * 
+     * TODO delete the default constructor and setter, make summary final
+     */
+    public PerformWikibaseEditsOperation() {
+    	super(null);
+    }
+    
+    @JsonProperty("engineConfig")
+    public void setEngineConfig(EngineConfig config) {
+    	this._engineConfig = config;
+    }
+    
+    @JsonProperty("summary")
+    public void setSummary(String summary) {
+    	this.summary = summary;
+    }
+
     @Override
     protected String getBriefDescription(Project project) {
         return "Perform Wikibase edits";

extensions/wikidata/src/org/openrefine/wikidata/operations/SaveWikibaseSchemaOperation.java

@@ -46,14 +46,30 @@ public class SaveWikibaseSchemaOperation extends AbstractOperation {
     @JsonIgnore
     final public static String operationDescription = "Save Wikibase schema";
     @JsonProperty("schema")
-    final protected WikibaseSchema _schema;
+    protected WikibaseSchema _schema;
 
     @JsonCreator
     public SaveWikibaseSchemaOperation(
     		@JsonProperty("schema")
     		WikibaseSchema schema) {
         this._schema = schema;
+    }
     
+    /* The constructor above should be enough for deserialization,
+     * but for some unknown reason it can fail in certain cases
+     * (might be due to caching deserializers across threads?)
+     * 
+     * So we sadly add a default constructor and a setter below.
+     * 
+     * TODO delete the default constructor and setter, make schema final
+     */
+    public SaveWikibaseSchemaOperation() {
+    	
+    }
+    
+    @JsonProperty("schema")
+    public void setSchema(WikibaseSchema schema) {
+    	this._schema = schema;
     }
 
     @Override