void toJson(JsonGenerator gen) throws IOException {
gen.writeStartObject();
gen.writeArrayFieldStart("sourceSchemas");
for (Schema schema : schemas) {
schema.toJson(gen);
}
gen.writeEndArray();
gen.writeObjectFieldStart("fieldAliases");
for (Map.Entry<String, Map<String, String>> entry : schemaFieldAliases.entrySet()) {
String schemaName = entry.getKey();
Map<String, String> aliases = entry.getValue();
gen.writeObjectField(schemaName, aliases);
}
gen.writeEndObject();
gen.writeArrayFieldStart("groupByFields");
for (String field : groupByFields) {
gen.writeString(field);
}
gen.writeEndArray();
if (customPartitionFields != null && !customPartitionFields.isEmpty()) {
gen.writeArrayFieldStart("customPartitionFields");
for (String field : customPartitionFields) {
gen.writeString(field);
}
gen.writeEndArray();
}
if (rollupFrom != null) {
gen.writeFieldName("rollupFrom");
gen.writeString(rollupFrom);
}
gen.writeFieldName("commonOrderBy");
commonCriteria.toJson(gen);
gen.writeStringField("schemasOrder", schemasOrder.toString());
// TODO this code should write a map with sourceName
if (specificCriterias == null || specificCriterias.isEmpty()) {
initSecondaryCriteriasWithNull();
}
gen.writeArrayFieldStart("specificOrderBys");
for (Criteria c : specificCriterias) {
if (c == null) {
gen.writeNull();
} else {
c.toJson(gen);
}
}
gen.writeEndArray();
gen.writeEndObject();
}
static TupleMRConfig parse(JsonNode node) throws IOException {
try {
TupleMRConfig result = new TupleMRConfig();
Iterator<JsonNode> sources = node.get("sourceSchemas").getElements();
while (sources.hasNext()) {
JsonNode sourceNode = sources.next();
result.addIntermediateSchema(Schema.parse(sourceNode));
}
Iterator<String> schemaNames = node.get("fieldAliases").getFieldNames();
while (schemaNames.hasNext()) {
String schemaName = schemaNames.next();
JsonNode aliasNode = node.get("fieldAliases").get(schemaName);
Aliases aliases = Aliases.parse(aliasNode);
result.schemaFieldAliases.put(schemaName, aliases.getAliases());
}
result.schemaFieldAliases = Collections.unmodifiableMap(result.schemaFieldAliases);
Iterator<JsonNode> groupFieldsNode = node.get("groupByFields").getElements();
List<String> groupFields = new ArrayList<String>();
while (groupFieldsNode.hasNext()) {
groupFields.add(groupFieldsNode.next().getTextValue());
}
result.groupByFields = Collections.unmodifiableList(groupFields);
if (node.get("rollupFrom") != null) {
result.rollupFrom = node.get("rollupFrom").getTextValue();
}
if (node.get("customPartitionFields") != null) {
Iterator<JsonNode> partitionNodes = node.get("customPartitionFields").getElements();
List<String> partitionFields = new ArrayList<String>();
while (partitionNodes.hasNext()) {
partitionFields.add(partitionNodes.next().getTextValue());
}
result.customPartitionFields = partitionFields;
}
JsonNode commonSortByNode = node.get("commonOrderBy");
result.commonCriteria = Criteria.parse(commonSortByNode);
result.schemasOrder = Order.valueOf(node.get("schemasOrder").getTextValue());
Iterator<JsonNode> specificNode = node.get("specificOrderBys").getElements();
result.specificCriterias = new ArrayList<Criteria>();
while (specificNode.hasNext()) {
JsonNode n = specificNode.next();
result.specificCriterias.add(n.isNull() ? null : Criteria.parse(n));
}
return result;
} catch (TupleMRException e) {
throw new IOException(e);
}
}