/**
* Parse the given {@code context} with the given {@code mapper} and apply
* the potential mapping update in-place. This method is useful when
* composing mapping updates.
*/
private static <M extends Mapper> M parseAndMergeUpdate(M mapper, ParseContext context) throws IOException {
final Mapper update = parseObjectOrField(context, mapper);
if (update != null) {
MapperUtils.merge(mapper, update);
}
return mapper;
}
static ObjectMapper parseObject(ParseContext context, ObjectMapper mapper) throws IOException {
if (mapper.isEnabled() == false) {
context.parser().skipChildren();
return null;
}
XContentParser parser = context.parser();
String currentFieldName = parser.currentName();
XContentParser.Token token = parser.currentToken();
if (token == XContentParser.Token.VALUE_NULL) {
// the object is null ("obj1" : null), simply bail
return null;
}
if (token.isValue()) {
throw new MapperParsingException("object mapping for [" + mapper.name() + "] tried to parse field [" + currentFieldName + "] as object, but found a concrete value");
}
ObjectMapper.Nested nested = mapper.nested();
if (nested.isNested()) {
context = context.createNestedContext(mapper.fullPath());
ParseContext.Document nestedDoc = context.doc();
ParseContext.Document parentDoc = nestedDoc.getParent();
// pre add the uid field if possible (id was already provided)
IndexableField uidField = parentDoc.getField(UidFieldMapper.NAME);
if (uidField != null) {
// we don't need to add it as a full uid field in nested docs, since we don't need versioning
// we also rely on this for UidField#loadVersion
// this is a deeply nested field
nestedDoc.add(new Field(UidFieldMapper.NAME, uidField.stringValue(), UidFieldMapper.Defaults.NESTED_FIELD_TYPE));
}
// the type of the nested doc starts with __, so we can identify that its a nested one in filters
// note, we don't prefix it with the type of the doc since it allows us to execute a nested query
// across types (for example, with similar nested objects)
nestedDoc.add(new Field(TypeFieldMapper.NAME, mapper.nestedTypePathAsString(), TypeFieldMapper.Defaults.FIELD_TYPE));
}
ContentPath.Type origPathType = context.path().pathType();
context.path().pathType(mapper.pathType());
// if we are at the end of the previous object, advance
if (token == XContentParser.Token.END_OBJECT) {
token = parser.nextToken();
}
if (token == XContentParser.Token.START_OBJECT) {
// if we are just starting an OBJECT, advance, this is the object we are parsing, we need the name first
token = parser.nextToken();
}
ObjectMapper update = null;
while (token != XContentParser.Token.END_OBJECT) {
ObjectMapper newUpdate = null;
if (token == XContentParser.Token.START_OBJECT) {
newUpdate = parseObject(context, mapper, currentFieldName);
} else if (token == XContentParser.Token.START_ARRAY) {
newUpdate = parseArray(context, mapper, currentFieldName);
} else if (token == XContentParser.Token.FIELD_NAME) {
currentFieldName = parser.currentName();
} else if (token == XContentParser.Token.VALUE_NULL) {
parseNullValue(context, mapper, currentFieldName);
} else if (token == null) {
throw new MapperParsingException("object mapping for [" + mapper.name() + "] tried to parse field [" + currentFieldName + "] as object, but got EOF, has a concrete value been provided to it?");
} else if (token.isValue()) {
newUpdate = parseValue(context, mapper, currentFieldName, token);
}
token = parser.nextToken();
if (newUpdate != null) {
if (update == null) {
update = newUpdate;
} else {
MapperUtils.merge(update, newUpdate);
}
}
}
// restore the enable path flag
context.path().pathType(origPathType);
if (nested.isNested()) {
ParseContext.Document nestedDoc = context.doc();
ParseContext.Document parentDoc = nestedDoc.getParent();
if (nested.isIncludeInParent()) {
for (IndexableField field : nestedDoc.getFields()) {
if (field.name().equals(UidFieldMapper.NAME) || field.name().equals(TypeFieldMapper.NAME)) {
continue;
} else {
parentDoc.add(field);
}
}
}
if (nested.isIncludeInRoot()) {
ParseContext.Document rootDoc = context.rootDoc();
// don't add it twice, if its included in parent, and we are handling the master doc...
if (!nested.isIncludeInParent() || parentDoc != rootDoc) {
for (IndexableField field : nestedDoc.getFields()) {
if (field.name().equals(UidFieldMapper.NAME) || field.name().equals(TypeFieldMapper.NAME)) {
continue;
} else {
rootDoc.add(field);
}
}
}
}
}
return update;
}
