@SuppressWarnings({"unchecked"})
private static void extractRawValues(
List values, Map<String, Object> part, String[] pathElements, int index) {
if (index == pathElements.length) {
return;
}
String key = pathElements[index];
Object currentValue = part.get(key);
int nextIndex = index + 1;
while (currentValue == null && nextIndex != pathElements.length) {
key += "." + pathElements[nextIndex];
currentValue = part.get(key);
nextIndex++;
}
if (currentValue == null) {
return;
}
if (currentValue instanceof Map) {
extractRawValues(values, (Map<String, Object>) currentValue, pathElements, nextIndex);
} else if (currentValue instanceof List) {
extractRawValues(values, (List) currentValue, pathElements, nextIndex);
} else {
values.add(currentValue);
}
}
public void testExtractRawValue() throws Exception {
XContentBuilder builder =
XContentFactory.jsonBuilder().startObject().field("test", "value").endObject();
Map<String, Object> map;
try (XContentParser parser =
XContentFactory.xContent(XContentType.JSON).createParser(builder.string())) {
map = parser.map();
}
assertThat(XContentMapValues.extractRawValues("test", map).get(0).toString(), equalTo("value"));
builder = XContentFactory.jsonBuilder().startObject().field("test.me", "value").endObject();
try (XContentParser parser =
XContentFactory.xContent(XContentType.JSON).createParser(builder.string())) {
map = parser.map();
}
assertThat(
XContentMapValues.extractRawValues("test.me", map).get(0).toString(), equalTo("value"));
builder =
XContentFactory.jsonBuilder()
.startObject()
.startObject("path1")
.startObject("path2")
.field("test", "value")
.endObject()
.endObject()
.endObject();
try (XContentParser parser =
XContentFactory.xContent(XContentType.JSON).createParser(builder.string())) {
map = parser.map();
}
assertThat(
XContentMapValues.extractRawValues("path1.path2.test", map).get(0).toString(),
equalTo("value"));
builder =
XContentFactory.jsonBuilder()
.startObject()
.startObject("path1.xxx")
.startObject("path2.yyy")
.field("test", "value")
.endObject()
.endObject()
.endObject();
try (XContentParser parser =
XContentFactory.xContent(XContentType.JSON).createParser(builder.string())) {
map = parser.map();
}
assertThat(
XContentMapValues.extractRawValues("path1.xxx.path2.yyy.test", map).get(0).toString(),
equalTo("value"));
}
@SuppressWarnings({"unchecked"})
private static void extractRawValues(
List values, List<Object> part, String[] pathElements, int index) {
for (Object value : part) {
if (value == null) {
continue;
}
if (value instanceof Map) {
extractRawValues(values, (Map<String, Object>) value, pathElements, index);
} else if (value instanceof List) {
extractRawValues(values, (List) value, pathElements, index);
} else {
values.add(value);
}
}
}
/**
* Extracts raw values (string, int, and so on) based on the path provided returning all of them
* as a single list.
*/
public static List<Object> extractRawValues(String path, Map<String, Object> map) {
List<Object> values = new ArrayList<>();
String[] pathElements = path.split("\\.");
if (pathElements.length == 0) {
return values;
}
extractRawValues(values, map, pathElements, 0);
return values;
}
/**
* Returns the values associated with the path. Those are "low" level values, and it can handle
* path expression where an array/list is navigated within.
*/
public List<Object> extractRawValues(String path) {
return XContentMapValues.extractRawValues(path, loadSourceIfNeeded());
}