public ParsedDocument parse(SourceToParse source, @Nullable ParseListener listener)
throws MapperParsingException {
ParseContext context = cache.get();
if (source.type() != null && !source.type().equals(this.type)) {
throw new MapperParsingException(
"Type mismatch, provide type ["
+ source.type()
+ "] but mapper is of type ["
+ this.type
+ "]");
}
source.type(this.type);
XContentParser parser = source.parser();
try {
if (parser == null) {
parser = XContentHelper.createParser(source.source());
}
context.reset(parser, new Document(), source, listener);
// on a newly created instance of document mapper, we always consider it as new mappers that
// have been added
if (initMappersAdded) {
context.setMappingsModified();
initMappersAdded = false;
}
// will result in START_OBJECT
int countDownTokens = 0;
XContentParser.Token token = parser.nextToken();
if (token != XContentParser.Token.START_OBJECT) {
throw new MapperParsingException("Malformed content, must start with an object");
}
boolean emptyDoc = false;
token = parser.nextToken();
if (token == XContentParser.Token.END_OBJECT) {
// empty doc, we can handle it...
emptyDoc = true;
} else if (token != XContentParser.Token.FIELD_NAME) {
throw new MapperParsingException(
"Malformed content, after first object, either the type field or the actual properties should exist");
}
if (type.equals(parser.currentName())) {
// first field is the same as the type, this might be because the type is provided, and the
// object exists within it
// or because there is a valid field that by chance is named as the type
// Note, in this case, we only handle plain value types, an object type will be analyzed as
// if it was the type itself
// and other same level fields will be ignored
token = parser.nextToken();
countDownTokens++;
// commented out, allow for same type with START_OBJECT, we do our best to handle it except
// for the above corner case
// if (token != XContentParser.Token.START_OBJECT) {
// throw new MapperException("Malformed content, a field with the same
// name as the type must be an object with the properties/fields within it");
// }
}
for (RootMapper rootMapper : rootMappersOrdered) {
rootMapper.preParse(context);
}
if (!emptyDoc) {
rootObjectMapper.parse(context);
}
for (int i = 0; i < countDownTokens; i++) {
parser.nextToken();
}
// fire up any new mappers if exists
if (!context.newFieldMappers().mappers.isEmpty()) {
addFieldMappers(context.newFieldMappers().mappers);
context.newFieldMappers().mappers.clear();
}
if (!context.newObjectMappers().mappers.isEmpty()) {
addObjectMappers(context.newObjectMappers().mappers);
context.newObjectMappers().mappers.clear();
}
for (RootMapper rootMapper : rootMappersOrdered) {
rootMapper.postParse(context);
}
for (RootMapper rootMapper : rootMappersOrdered) {
rootMapper.validate(context);
}
} catch (Throwable e) {
// we have to fire up any new mappers even on a failure, because they
// have been added internally to each compound mapper...
// ... we have no option to "rollback" a change, which is very tricky in our copy on change
// system...
if (!context.newFieldMappers().mappers.isEmpty()) {
addFieldMappers(context.newFieldMappers().mappers);
context.newFieldMappers().mappers.clear();
}
if (!context.newObjectMappers().mappers.isEmpty()) {
addObjectMappers(context.newObjectMappers().mappers);
context.newObjectMappers().mappers.clear();
}
// if its already a mapper parsing exception, no need to wrap it...
if (e instanceof MapperParsingException) {
throw (MapperParsingException) e;
}
throw new MapperParsingException("failed to parse", e);
} finally {
// only close the parser when its not provided externally
if (source.parser() == null && parser != null) {
parser.close();
}
}
// reverse the order of docs for nested docs support, parent should be last
if (context.docs().size() > 1) {
Collections.reverse(context.docs());
}
// apply doc boost
if (context.docBoost() != 1.0f) {
Set<String> encounteredFields = Sets.newHashSet();
for (Document doc : context.docs()) {
encounteredFields.clear();
for (IndexableField field : doc) {
if (field.fieldType().indexed() && !field.fieldType().omitNorms()) {
if (!encounteredFields.contains(field.name())) {
((Field) field).setBoost(context.docBoost() * field.boost());
encounteredFields.add(field.name());
}
}
}
}
}
ParsedDocument doc =
new ParsedDocument(
context.uid(),
context.id(),
context.type(),
source.routing(),
source.timestamp(),
source.ttl(),
context.docs(),
context.analyzer(),
context.source(),
context.mappingsModified())
.parent(source.parent());
// reset the context to free up memory
context.reset(null, null, null, null);
return doc;
}