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package eu.dnetlib.clients.index.model.util;
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import java.util.*;
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import java.util.Map.Entry;
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import eu.dnetlib.clients.index.model.*;
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import eu.dnetlib.clients.index.model.impl.DefaultDataFactoryImpl;
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/**
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* utility class for handling / conversion of Any objects.
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* <p>
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* Hint: The Any-to-JSON conversion for Date(Time)s is not symmetric. If the Any object contains Date(Time) values, they will be serialized
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* to String values in simple timestamp format. But when parsing JSON to an Any object, Date(Time) strings will not be recognized anymore,
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* but just read as String values.
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*/
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public class AnyUtil {
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/**
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* Immutable empty AnyMap instance.
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*/
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public static final AnyMap EMPTY_MAP = DefaultDataFactoryImpl.IMMUTABLE_EMPTY_MAP;
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/**
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* prevent instance creation.
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*/
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protected AnyUtil() {
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// prevent instance creation
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}
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/**
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* Converts an Any object into a native java object.
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*
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* @param any the Any object
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* @return a Pojo
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*/
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public static Object anyToNative(final Any any) {
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if (any.isMap()) {
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final LinkedHashMap<String, Object> map = new LinkedHashMap<String, Object>();
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for (final Iterator<String> kIt = ((AnyMap) any).keySet().iterator(); kIt.hasNext(); ) {
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final String key = kIt.next();
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map.put(key, anyToNative(((AnyMap) any).get(key)));
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}
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return map;
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} else if (any.isSeq()) {
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final ArrayList<Object> list = new ArrayList<Object>();
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for (final Iterator<Any> aIt = any.iterator(); aIt.hasNext(); ) {
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final Any a = aIt.next();
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list.add(anyToNative(a));
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}
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return list;
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} else if (any.isString()) return ((Value) any).asString();
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else if (any.isLong()) return ((Value) any).asLong();
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else if (any.isDouble()) return ((Value) any).asDouble();
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else if (any.isBoolean()) return ((Value) any).asBoolean();
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else if (any.isDate()) return ((Value) any).asDate();
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else if (any.isDateTime()) return ((Value) any).asDateTime();
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else return ((Value) any).getObject();
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}
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/**
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* Converts an object to an Any (recursively). The leaf object(s) must be convertable by {@link DataFactory#autoConvertValue(Object)}.
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*
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* @param object The object to be converted. Supported (and tested in this order) are
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* <ul>
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* <li>{@code Map<String, Object>}
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* <li>{@code Collections<Object>}
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* <li>{@code Object[]}
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* <li>Any other object that can be {@link DataFactory#autoConvertValue(Object)}</li>
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* </ul>
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* @return The converted Any
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*/
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@SuppressWarnings("unchecked")
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public static Any objectToAny(final Object object) {
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Any value = null;
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if (object instanceof Any) return (Any) object;
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else if (object instanceof Map<?, ?>) {
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value = mapToAny((Map<String, Object>) object);
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} else if (object instanceof Collection<?>) {
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value = collectionToAny((Collection<Object>) object);
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} else if (object.getClass().isArray()) {
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Object[] array = (Object[]) object;
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value = collectionToAny(Arrays.asList(array));
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} else {
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value = scalarObjectToAny(object);
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}
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return value;
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}
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/**
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* Converts a collection to an AnySeq object.
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*
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* @param objects The list of objects to convert.
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* @return An AnySeq containing the objects as Any objects.
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*/
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private static AnySeq collectionToAny(final Collection<Object> objects) {
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AnySeq anySeq = null;
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if (objects != null) {
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anySeq = DataFactory.DEFAULT.createAnySeq();
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for (final Object obj : objects) {
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anySeq.add(objectToAny(obj));
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}
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}
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return anySeq;
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}
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/**
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* Converts a scalar object to a Value object.
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*
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* @param obj The object to convert.
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* @return A Value representing the object.
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*/
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private static Any scalarObjectToAny(final Object obj) {
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return DataFactory.DEFAULT.autoConvertValue(obj);
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}
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/**
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* Converts a map to an AnyMap object.
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*
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* @param map The map (String to Object) to convert.
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* @return An AnyMap representing the map with all Objects converted to Any.
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*/
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private static AnyMap mapToAny(final Map<String, Object> map) {
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AnyMap anyMap = null;
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if (map != null) {
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anyMap = DataFactory.DEFAULT.createAnyMap();
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for (final Entry<String, Object> entry : map.entrySet()) {
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anyMap.put(entry.getKey(), objectToAny(entry.getValue()));
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}
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}
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return anyMap;
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}
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/**
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* get value for given path(list of keys) from AnyMap object. This methods throws no exception, if the path not exists an empty Any is
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* the result.
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*
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* @param any the Any object.
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* @param path path to the entry.
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* @return value associated to the path.
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*/
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public static Any saveGet(final Any any, final String[] path) {
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if (path.length == 0) return DataFactory.DEFAULT.createAnyMap();
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try {
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Any current = any;
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for (final String key : path) {
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if (current.isMap()) {
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current = ((AnyMap) current).get(key);
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} else {
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current = null;
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}
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}
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if (current == null) return DataFactory.DEFAULT.createStringValue("undef");
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else return current;
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} catch (final Exception e) {
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return DataFactory.DEFAULT.createStringValue("undef");
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}
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}
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/**
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* convert an exception to an any object.
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*
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* @param e exception to convert
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* @return any representation of exception
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*/
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public static AnyMap exceptionToAny(final Throwable e) {
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return exceptionToAny(e, new HashSet<String>());
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}
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/**
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* convert an exception to an any object. stop in stacktrace printing when hitting known lines again.
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*
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* @param e exception to convert
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* @param visitedLines lines that have been added to stacktraces before.
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* @return any representation of exception
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*/
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private static AnyMap exceptionToAny(final Throwable e, final Collection<String> visitedLines) {
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final AnyMap any = DataFactory.DEFAULT.createAnyMap();
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any.put("type", e.getClass().getName());
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if (e.getMessage() != null) {
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any.put("message", e.getMessage());
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}
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final AnySeq st = DataFactory.DEFAULT.createAnySeq();
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for (final StackTraceElement stElement : e.getStackTrace()) {
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final String line = stElement.toString();
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st.add(line);
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if (!visitedLines.add(line)) {
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st.add("...");
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break;
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}
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}
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any.put("at", st);
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if ((e.getCause() != null) && (e.getCause() != e)) {
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any.put("causedBy", exceptionToAny(e.getCause(), visitedLines));
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}
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return any;
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}
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/**
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* null save version.
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*/
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public static Double asDouble(final Any any) {
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return any == null ? null : any.asValue().asDouble();
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}
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;
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/**
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* null save version.
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*/
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public static Boolean asBoolean(final Any any) {
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return any == null ? null : any.asValue().asBoolean();
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}
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;
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/**
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* null save version.
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*/
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public static Date asDateTime(final Any any) {
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return any == null ? null : any.asValue().asDateTime();
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}
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;
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/**
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* null save version.
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*/
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public static Date asDate(final Any any) {
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return any == null ? null : any.asValue().asDate();
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}
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;
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/**
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* null save version.
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*/
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public static Long asLong(final Any any) {
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return any == null ? null : any.asValue().asLong();
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}
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;
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/**
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* null save version.
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*/
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public static String asString(final Any any) {
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return any == null ? null : any.asValue().asString();
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}
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;
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/**
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* null save version.
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*/
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public static AnyMap asMap(final Any any) {
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return any == null ? null : any.asMap();
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}
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;
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/**
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* null save version.
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*/
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public static AnySeq asSeq(final Any any) {
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return any == null ? null : any.asSeq();
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}
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;
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/**
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* convert AnyMap to java.util.Properties.
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*/
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public static Properties anyToProperties(final AnyMap anyMap) {
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Properties props = new Properties();
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final Set<String> keySet = anyMap.keySet();
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for (final String key : keySet) {
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props.put(key, anyMap.get(key).toString());
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}
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return props;
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}
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/**
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* convert java.util.Properties to AnyMap.
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*/
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public static AnyMap propertiesToAny(final Properties props) {
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final AnyMap any = DataFactory.DEFAULT.createAnyMap();
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final Set<String> propNames = props.stringPropertyNames();
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for (final String prop : propNames) {
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any.put(prop, props.getProperty(prop));
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}
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return any;
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}
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/**
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* returns the 1st map in the give SEQ that contains a value with the given name value, or null if not found.
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* <p>
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* This is often useful for configs that are contained in a seq such as search filters.
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*
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* @since 1.1
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*/
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public static AnyMap findMapInSeq(final AnySeq seq, final String keyName, final String keyValue) {
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for (Any any : seq) {
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final String stringValue = any.asMap().getStringValue(keyName);
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if (keyValue.equals(stringValue)) return any.asMap();
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}
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return null;
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}
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}
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