Reserialization utilities for loaded data

tdrules-store-loader/src/main/java/giis/tdrules/store/loader/oa/Reserializer.java

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+package giis.tdrules.store.loader.oa;
+
+import java.util.Iterator;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.DeserializationFeature;
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+import giis.tdrules.store.loader.LoaderException;
+
+/**
+ * Utilities to reorganize json strings containing serialized test data to
+ * facilitate the display and test result comparison. Note that the resulting
+ * strings are not valid json, only for display.
+ */
+public class Reserializer {
+	/**
+	 * Returns a string containing the whole content of the data stored, suitable
+	 * for display or test data comparison. Given a json string representing an
+	 * object, where each property has a key with the entity name and a value with
+	 * an array of the objects stored in this entity, produces a string where each
+	 * line includes an entity name and a single object.
+	 */
+	public String reserializeData(String payload) {
+		StringBuilder sb = new StringBuilder();
+		ObjectMapper mapper = new ObjectMapper().configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
+		try {
+			JsonNode entities = mapper.readTree(payload);
+			Iterator<String> entitiesIt = entities.fieldNames();
+			while (entitiesIt.hasNext()) {
+				String entity = entitiesIt.next();
+				JsonNode objects = entities.get(entity);
+				Iterator<JsonNode> objectsIt = objects.iterator();
+				while (objectsIt.hasNext()) { // a line for each object
+					JsonNode object = (JsonNode) objectsIt.next();
+					sb.append("\"" + entity + "\":" + object + "\n");
+				}
+			}
+		} catch (JsonProcessingException e) {
+			throw new LoaderException(e);
+		}
+		return sb.toString();
+	}
+
+	/**
+	 * Returns a string containing a list of objects, suitable for display or test
+	 * data comparison. Given a json string representing a list of objects, produces
+	 * a string where each object is in a line
+	 */
+	public String reserializeList(String payload) {
+		StringBuilder sb = new StringBuilder();
+		ObjectMapper mapper = new ObjectMapper().configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
+		try {
+			JsonNode objects = mapper.readTree(payload);
+			Iterator<JsonNode> objectsIt = objects.elements();
+			while (objectsIt.hasNext()) {
+				JsonNode object = objectsIt.next();
+				sb.append(object + "\n");
+			}
+		} catch (JsonProcessingException e) {
+			throw new LoaderException(e);
+		}
+		return sb.toString();
+	}
+
+}

tdrules-store-loader/src/test/java/test4giis/tdrules/store/loader/oa/TestReserialize.java

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+package test4giis.tdrules.store.loader.oa;
+
+import static org.junit.Assert.assertEquals;
+
+import org.junit.Test;
+
+import giis.tdrules.store.loader.oa.Reserializer;
+
+public class TestReserialize {
+
+	@Test
+	public void testReserializeData() {
+		String output="{'ent1':[{'attr111':111, 'attr112':112}, {'attr121':121, 'attr122':122}], "
+				+ "'ent2':[], "
+				+ "'ent3':[{'attr311':311}, {}]"
+				+ "}";
+		String expected="'ent1':{'attr111':111,'attr112':112}\n"
+				+ "'ent1':{'attr121':121,'attr122':122}\n"
+				+ "'ent3':{'attr311':311}\n"
+				+ "'ent3':{}\n";
+		output = output.replace("'", "\"");
+		expected=expected.replace("'", "\"");
+		String actual=new Reserializer().reserializeData(output);
+		assertEquals(expected, actual);
+	}
+
+	@Test
+	public void testReserialize() {
+		String output="[{'attr111':111, 'attr112':112}, {}, {'attr121':121}]";
+		String expected="{'attr111':111,'attr112':112}\n"
+				+ "{}\n"
+				+ "{'attr121':121}\n";
+		output = output.replace("'", "\"");
+		expected=expected.replace("'", "\"");
+		String actual=new Reserializer().reserializeList(output);
+		assertEquals(expected, actual);
+	}
+
+}