public static class Builder extends MetadataFieldMapper.Builder<Builder, ParentFieldMapper> {
private String parentType;
protected String indexName;
private final String documentType;
private final MappedFieldType parentJoinFieldType = Defaults.JOIN_FIELD_TYPE.clone();
private final MappedFieldType childJoinFieldType = Defaults.JOIN_FIELD_TYPE.clone();
public Builder(String documentType) {
super(Defaults.NAME, Defaults.FIELD_TYPE, Defaults.FIELD_TYPE);
this.indexName = name;
this.documentType = documentType;
builder = this;
}
public Builder type(String type) {
this.parentType = type;
return builder;
}
@Override
public Builder fieldDataSettings(Settings fieldDataSettings) {
Settings settings =
Settings.builder()
.put(childJoinFieldType.fieldDataType().getSettings())
.put(fieldDataSettings)
.build();
childJoinFieldType.setFieldDataType(
new FieldDataType(childJoinFieldType.fieldDataType().getType(), settings));
return this;
}
@Override
public ParentFieldMapper build(BuilderContext context) {
if (parentType == null) {
throw new MapperParsingException("[_parent] field mapping must contain the [type] option");
}
parentJoinFieldType.setName(joinField(documentType));
parentJoinFieldType.setFieldDataType(null);
childJoinFieldType.setName(joinField(parentType));
return new ParentFieldMapper(
fieldType, parentJoinFieldType, childJoinFieldType, parentType, context.indexSettings());
}
}
private static MappedFieldType joinFieldTypeForParentType(
String parentType, Settings indexSettings) {
MappedFieldType parentJoinFieldType = Defaults.JOIN_FIELD_TYPE.clone();
parentJoinFieldType.setName(joinField(parentType));
parentJoinFieldType.freeze();
return parentJoinFieldType;
}
private boolean joinFieldHasCustomFieldDataSettings() {
return childJoinFieldType != null
&& childJoinFieldType.fieldDataType() != null
&& childJoinFieldType.fieldDataType().equals(Defaults.JOIN_FIELD_TYPE.fieldDataType())
== false;
}
