Add OperationResolver

main/src/com/google/refine/model/OperationResolver.java

@@ -0,0 +1,36 @@
+package com.google.refine.model;
+
+import java.io.IOException;
+
+import com.fasterxml.jackson.annotation.JsonTypeInfo.Id;
+import com.fasterxml.jackson.databind.DatabindContext;
+import com.fasterxml.jackson.databind.JavaType;
+import com.fasterxml.jackson.databind.jsontype.impl.TypeIdResolverBase;
+import com.fasterxml.jackson.databind.type.TypeFactory;
+
+import com.google.refine.operations.OperationRegistry;
+
+public class OperationResolver extends TypeIdResolverBase {
+    
+    protected TypeFactory factory = TypeFactory.defaultInstance();
+
+    @Override
+    public Id getMechanism() {
+        return Id.NAME;
+    }
+
+    @Override
+    public String idFromValue(Object instance) {
+        return ((AbstractOperation)instance).getOperationId();
+    }
+
+    @Override
+    public String idFromValueAndType(Object instance, Class<?> type) {
+        return OperationRegistry.s_opClassToName.get(type);
+    }
+    
+    @Override
+    public JavaType typeFromId(DatabindContext context, String id) throws IOException {
+        return factory.constructSimpleType(OperationRegistry.resolveOperationId(id), new JavaType[0]);
+    }
+}