Here you can find the source of buildOptions(T buildedOptions, Bindings options)
public static <T> T buildOptions(T buildedOptions, Bindings options)
//package com.java2s;
// it under the terms of the GNU General Public License as published by
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Arrays;
import java.util.Map;
import java.util.Map.Entry;
import java.util.function.Function;
import java.util.stream.Collectors;
import javax.script.Bindings;
import com.google.common.base.Preconditions;
import com.mongodb.BasicDBList;
import com.mongodb.BasicDBObject;
import jdk.nashorn.api.scripting.JSObject;
public class Main {
public static <T> T buildOptions(T buildedOptions, Bindings options) {
Preconditions.checkNotNull(buildedOptions);
if (options == null || options.isEmpty()) {
return buildedOptions;
}/*from w w w. j a v a2 s .co m*/
Map<String, Method> methods =
Arrays.stream(buildedOptions.getClass().getMethods()).filter(m -> !Object.class.equals(m.getDeclaringClass()))
.collect(Collectors.toMap(m -> m.getName(), Function.identity()));
for (Entry<String, Object> entry : options.entrySet()) {
String key = entry.getKey();
Method keyMethod = methods.get(key);
if (keyMethod == null) {
throw new IllegalArgumentException("Wrong options argument " + key);
}
Object value = entry.getValue();
if (value instanceof Bindings) {
value = dbObjectFromMap((Bindings)value);
}
try {
keyMethod.invoke(buildedOptions, value);
}
catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException e) {
throw new RuntimeException(e);
}
}
return buildedOptions;
}
public static BasicDBObject dbObjectFromMap(Map<String, Object> from) {
BasicDBObject result = new BasicDBObject();
for (Entry<String, Object> entry : from.entrySet()) {
result.append(entry.getKey(), convert(entry.getValue()));
}
return result;
}
@SuppressWarnings("unchecked")
private static Object convert(Object from) {
if (from instanceof JSObject) {
if (((JSObject) from).isArray()) {
return convertArray((Bindings) from);
}
}
if (from instanceof Map) {
return dbObjectFromMap((Map<String, Object>) from);
}
return from;
}
private static BasicDBList convertArray(Bindings from) {
BasicDBList list = new BasicDBList();
for (int i = 0; i < from.size(); i++) {
list.add(from.get(String.valueOf(i)));
}
return list;
}
}