@Override
public FacetCollector parse(String facetName, XContentParser parser, SearchContext context)
throws IOException {
String keyField = null;
String valueField = null;
String scriptLang = null;
String keyScript = null;
String valueScript = null;
Map<String, Object> params = null;
XContentParser.Token token;
String fieldName = null;
List<RangeFacet.Entry> entries = Lists.newArrayList();
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
fieldName = parser.currentName();
} else if (token == XContentParser.Token.START_ARRAY) {
if (!"ranges".equals(fieldName)) {
// this is the actual field name, so also update the keyField
keyField = fieldName;
}
while ((token = parser.nextToken()) != XContentParser.Token.END_ARRAY) {
RangeFacet.Entry entry = new RangeFacet.Entry();
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
fieldName = parser.currentName();
} else if (token == XContentParser.Token.VALUE_STRING) {
if ("from".equals(fieldName)) {
entry.fromAsString = parser.text();
} else if ("to".equals(fieldName)) {
entry.toAsString = parser.text();
}
} else if (token.isValue()) {
if ("from".equals(fieldName)) {
entry.from = parser.doubleValue();
} else if ("to".equals(fieldName)) {
entry.to = parser.doubleValue();
}
}
}
entries.add(entry);
}
} else if (token == XContentParser.Token.START_OBJECT) {
if ("params".equals(fieldName)) {
params = parser.map();
}
} else if (token.isValue()) {
if ("field".equals(fieldName)) {
keyField = parser.text();
} else if ("key_field".equals(fieldName) || "keyField".equals(fieldName)) {
keyField = parser.text();
} else if ("value_field".equals(fieldName) || "valueField".equals(fieldName)) {
valueField = parser.text();
} else if ("key_script".equals(fieldName) || "keyScript".equals(fieldName)) {
keyScript = parser.text();
} else if ("value_script".equals(fieldName) || "valueScript".equals(fieldName)) {
valueScript = parser.text();
} else if ("lang".equals(fieldName)) {
scriptLang = parser.text();
}
}
}
if (entries.isEmpty()) {
throw new FacetPhaseExecutionException(facetName, "no ranges defined for range facet");
}
RangeFacet.Entry[] rangeEntries = entries.toArray(new RangeFacet.Entry[entries.size()]);
if (keyScript != null && valueScript != null) {
return new ScriptRangeFacetCollector(
facetName, scriptLang, keyScript, valueScript, params, rangeEntries, context);
}
if (keyField == null) {
throw new FacetPhaseExecutionException(
facetName,
"key field is required to be set for range facet, either using [field] or using [key_field]");
}
// we have a keyField
FieldMapper keyFieldMapper = context.smartNameFieldMapper(keyField);
if (keyFieldMapper == null) {
throw new FacetPhaseExecutionException(
facetName, "No mapping found for key_field [" + keyField + "]");
}
for (RangeFacet.Entry entry : rangeEntries) {
if (entry.fromAsString != null) {
entry.from = ((Number) keyFieldMapper.value(entry.fromAsString)).doubleValue();
}
if (entry.toAsString != null) {
entry.to = ((Number) keyFieldMapper.value(entry.toAsString)).doubleValue();
}
}
IndexNumericFieldData keyIndexFieldData = context.fieldData().getForField(keyFieldMapper);
if (valueField == null || keyField.equals(valueField)) {
return new RangeFacetCollector(facetName, keyIndexFieldData, rangeEntries, context);
} else {
FieldMapper valueFieldMapper = context.smartNameFieldMapper(valueField);
if (valueFieldMapper == null) {
throw new FacetPhaseExecutionException(
facetName, "No mapping found for value_field [" + keyField + "]");
}
IndexNumericFieldData valueIndexFieldData = context.fieldData().getForField(valueFieldMapper);
// we have a value field, and its different than the key
return new KeyValueRangeFacetCollector(
facetName, keyIndexFieldData, valueIndexFieldData, rangeEntries, context);
}
}
