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package net.yadaframework.persistence;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.MessageSource;
import org.springframework.context.i18n.LocaleContextHolder;
import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Transactional;
import jakarta.persistence.EntityManager;
import jakarta.persistence.PersistenceContext;
import jakarta.persistence.Query;
import net.yadaframework.components.YadaUtil;
import net.yadaframework.persistence.entity.YadaPersistentEnum;
import net.yadaframework.web.YadaDatatablesColumn;
import net.yadaframework.web.YadaDatatablesOrder;
import net.yadaframework.web.YadaDatatablesRequest;
@Repository
@Transactional(readOnly = true)
//TODO non considera il search su singola colonna "columns[i][search][value]", nel senso che usa solo il global search su tutte le colonne searchable
public class YadaDataTableDao {
private final transient Logger log = LoggerFactory.getLogger(getClass());
@Autowired MessageSource messageSource;
@Autowired YadaUtil yadaUtil;
@PersistenceContext
EntityManager em;
/**
* Returns a map with the result in the format needed by DataTables.
* All values that are included in the annotated json view (on the caller) will end up in the resulting json
* @param yadaDatatablesRequest
* @param entityClass
* @param locale
* @return
*/
@Deprecated // Use getConvertedJsonPage instead
public Map getJsonPage(YadaDatatablesRequest yadaDatatablesRequest, Class entityClass, Locale locale) {
Map json = new HashMap();
try {
List data = getPage(yadaDatatablesRequest, entityClass, locale);
// Eagerly fetching localized strings. This should not be a performance problem as DataTables is generally used in internal admin pages with a few lines.
YadaUtil.prefetchLocalizedStringList(data, entityClass);
json.put("draw", yadaDatatablesRequest.getDraw());
json.put("recordsTotal", yadaDatatablesRequest.getRecordsTotal());
json.put("recordsFiltered", yadaDatatablesRequest.getRecordsFiltered());
json.put("data", data);
} catch (Exception e) {
log.error("Can't retrieve data", e);
json.put("error", e.toString()); // TODO handle the error in javascript
}
return json;
}
/**
* Returns a map with the result in the format needed by DataTables.
* Only requested values are returned in the map. There is no need to call a json converter because everything is a map already.
* @param yadaDatatablesRequest
* @param entityClass
* @param locale
* @return
*/
public Map getConvertedJsonPage(YadaDatatablesRequest yadaDatatablesRequest, Class entityClass, Locale locale) {
Map json = new HashMap();
try {
List entityPage = getPage(yadaDatatablesRequest, entityClass, locale);
List> jsonData = convertToJson(entityPage, yadaDatatablesRequest, entityClass, locale);
json.put("draw", yadaDatatablesRequest.getDraw());
json.put("recordsTotal", yadaDatatablesRequest.getRecordsTotal());
json.put("recordsFiltered", yadaDatatablesRequest.getRecordsFiltered());
json.put("data", jsonData);
} catch (Exception e) {
log.error("Can't retrieve data", e);
// The error object must have the same structure of the one inside ajaxError.html
Map inner = new HashMap<>();
inner.put("error", e.toString());
json.put("yadaError", inner);
}
return json;
}
/**
* Retrieve all values requested and put them in a json-like structure
* @param entityPage
* @param yadaDatatablesRequest
* @param entityClass
* @param locale
* @return never null
*/
private List> convertToJson(List entityPage, YadaDatatablesRequest yadaDatatablesRequest, Class entityClass, Locale locale) {
Field idField = yadaUtil.getFieldNoTraversing(entityClass, "id");
idField.setAccessible(true);
//
List> json = new ArrayList>();
for (entityClass entity : entityPage) {
Map entityJson = new HashMap();
json.add(entityJson);
// Conversion from java to map
for (YadaDatatablesColumn column : yadaDatatablesRequest.getColumns()) {
String attributePath = column.getNameOrData(); // Name is the database attribute, data is the json attribute and could also be a javascript function
if (attributePath!=null) {
addAttributeValue(entity, entityJson, attributePath);
}
}
// Add any extra json attributes
for (String attributePath : yadaDatatablesRequest.getExtraJsonAttributes()) {
if (attributePath!=null) {
addAttributeValue(entity, entityJson, attributePath);
}
}
// Add DT_RowClass
addAttributeValue(entity, entityJson, "DT_RowClass");
// Add DT_RowId for DataTables id
// TODO when on a single page there are multiple tables with the same object, the ids are not unique.
// We should prefix them with the table id, if any.
try {
Long id = (Long) idField.get(entity);
entityJson.put("DT_RowId", entityClass.getSimpleName()+"#"+id);
} catch (Exception e) {
log.error("Failed to set DT_RowId for entity {} (ignored)", entity);
}
}
return json;
}
/**
*
* @param entity The object containing the data
* @param entityJson the map that will be populated with values
* @param attributePath the path in the entity that contains the value. Can be an attribute path or a method path
*/
private void addAttributeValue(entityClass entity, Map entityJson, String attributePath) {
try {
if (entity==null) {
return;
}
Object value = "";
String[] parts = attributePath.split("\\.", 2);
String attributeName = parts[0];
if ("_yadaSelectionColumn".equals(attributeName) || "_yadaCommandColumn".equals(attributeName)) {
return;
}
if (entity instanceof java.util.Map) {
Map mapEntity = (Map) entity;
// The old version was generating a key from the String value, but needed to know how to do that,
// so only String and Locale keys were supported.
// // If the field is a map, handle String and Locale keys only
// if (keyType.getTypeName().equals(String.class.getName())) {
// value = mapEntity.get(attributeName);
// } else if (keyType.getTypeName().equals(Locale.class.getName())) {
// value = mapEntity.get(new Locale(attributeName));
// } else {
// log.debug("Invalid map key type {} - value ignored", keyType);
// }
// The new version is a bit less efficient but can cope with any key type because
// it relies on the toString iterating on all the keys
Set> entrySet = mapEntity.entrySet();
for (Entry entry : entrySet) {
if (entry.getKey().toString().equals(attributeName)) {
value = entry.getValue();
break;
}
}
} else {
Field field = yadaUtil.getFieldNoTraversing(entity.getClass(), attributeName);
Type valueType = null;
if (field!=null) {
field.setAccessible(true);
value = field.get(entity);
valueType = field.getType();
// If the value is null it might be a lazy attribute, so try the getter too
if (value==null) {
try {
String prefix = (valueType==boolean.class || valueType==Boolean.class)?"is":"get";
String getterName = prefix + field.getName().substring(0, 1).toUpperCase() + field.getName().substring(1);
Method getter = entity.getClass().getMethod(getterName);
getter.setAccessible(true);
value = getter.invoke(entity);
} catch (Exception e) {
log.debug("Getter invocation exception (ignored): {}", e.getMessage());
}
}
} else {
try {
// Not a field, but it could be a method
value = org.apache.commons.beanutils.PropertyUtils.getProperty(entity, attributeName);
valueType = value.getClass();
} catch (Exception e) {
// Not even a method
if (!"DT_RowClass".equals(attributeName)) {
log.debug("Field {} in entity {} not found (ignored)", attributeName, entity.getClass());
}
return;
}
}
if (valueType.equals(YadaPersistentEnum.class)) {
if (value==null) {
ParameterizedType type = (ParameterizedType) field.getGenericType();
log.debug("null value for {}.{} - did you add enum {} to the YadaSetup.setupApplication() method?", entity.getClass().getSimpleName(), field.getName(), type.getActualTypeArguments()[0]);
} else {
value = ((YadaPersistentEnum)value).getLocalText();
}
}
// The old version
// if (value instanceof java.util.Map) {
// ParameterizedType type = (ParameterizedType) field.getGenericType();
// keyType = type.getActualTypeArguments()[0];
// }
}
if (parts.length==1) {
// End of the path
entityJson.put(attributeName, value==null?null:value.toString());
return;
}
// Recurse into the path
Map jsonValue = (Map) entityJson.get(attributeName);
if (jsonValue==null) {
jsonValue = new HashMap<>();
entityJson.put(attributeName, jsonValue);
}
addAttributeValue(value, jsonValue, parts[1] /*, keyType*/);
} catch (Exception e) {
log.error("Can't get value of {} for entity {} - ignored", attributePath, entity, e);
}
}
/**
* Preleva una pagina di risultati che rispettino i parametri inviati via web.
* Il nome delle colonne su cui fare le query e il sort viene preso da "name" oppure da "data" di DataTables.
* @param yadaDatatablesRequest parametri della query, conterrà anche il count finale
* @param targetClass tipo dell'oggetto da cercare
* @return Pagina di oggetti di tipo targetClass. Il numero totale è reperibile in yadaDatatablesRequest.recordsFiltered
*/
@SuppressWarnings("rawtypes")
protected List getPage(YadaDatatablesRequest yadaDatatablesRequest, Class targetClass, Locale locale) {
String requestSearchValue = yadaDatatablesRequest.getSearch().getValue();
String globalSearchString = requestSearchValue!=null?StringUtils.trimToNull(requestSearchValue.toLowerCase(locale)):null;
// String globalCondition = StringUtils.trimToNull(yadaDatatablesRequest.getGlobalCondition());
Long globalSearchNumber = null;
boolean globalSearchEnabled = globalSearchString!=null;
if (globalSearchEnabled) {
try {
globalSearchNumber = Long.parseLong(globalSearchString);
} catch (NumberFormatException e) {
// log.debug("Invalid globalSearchString '{}'", globalSearchString);
// Ignore
}
}
YadaSql yadaSql = yadaDatatablesRequest.getYadaSql();
YadaSql countSql = (YadaSql) YadaUtil.copyEntity(yadaSql, true); // Copy any conditions set before calling
YadaSql searchSql = YadaSql.instance();
yadaSql.selectFrom("select distinct e from "+targetClass.getSimpleName()+" e");
countSql.selectFrom("select count(distinct e.id) from "+targetClass.getSimpleName()+" e");
// Searching
List yadaDatatablesColumns = yadaDatatablesRequest.getColumns();
for (YadaDatatablesColumn yadaDatatablesColumn : yadaDatatablesColumns) {
boolean columnSearchable = yadaDatatablesColumn.isSearchable();
if (globalSearchEnabled && columnSearchable) {
// First use the name as the attribute, then use the data
String attributeName = yadaDatatablesColumn.getNameOrData();
if (attributeName!=null) {
try {
// attributeName could be composite like company.name so we can't get the Field directly
// Field field = targetClass.getDeclaredField(attributeName);
// Class attributeType = field.getType();
Class attributeType;
try {
attributeType = yadaUtil.getType(targetClass, attributeName);
} catch (Exception e) {
// If the searched attribute is composite like "shape.color" but some part of the path is implemented in a
// subclass (for example the "color" attribute is only implemented in the class ColoredShape that is a subclass
// of the class Shape that is the type of the shape attribute), we get an exception because the
// subclass can not be searched for the attribute.
// There's nothing we can do about it because from the superclass we can't get the subclass.
// As a fallback, we use the String type but this can not be always appropriate.
log.warn("Can't find type for {}.{}, using String.class as a fallback (might not work)", targetClass.getSimpleName(), attributeName);
attributeType = String.class;
}
// Add left joins otherwise Hibernate creates cross joins hence it doesn't return rows with null values
attributeName = addLeftJoins(attributeName, yadaSql, targetClass);
if (attributeType == String.class) {
searchSql.where(attributeName + " like :globalSearchString").or();
} else if (attributeType == Boolean.class || attributeType == boolean.class) {
// TODO localizzare "true"/"false" (ma anche no)
if ("true".indexOf(globalSearchString)>-1) {
searchSql.where(attributeName + " = true").or();
} else if ("false".indexOf(globalSearchString)>-1) {
searchSql.where(attributeName + " = false").or();
}
} else if (attributeType == YadaPersistentEnum.class) {
// No need for KEY(" + attributeName + ") = :yadalang" because it's added by addLeftJoins()
searchSql.where(attributeName + " like :globalSearchString").or();
searchSql.setParameter("yadalang", LocaleContextHolder.getLocale().getLanguage());
} else if (attributeType.isEnum()) {
// Per gli enum devo ciclare su tutte le chiavi, prendere i valori nel locale corrente, e scoprire quali enum contengono la searchkey
List enumValues = new ArrayList();
for (Object enumConstant : attributeType.getEnumConstants()) {
String enumText = enumConstant.toString().toLowerCase();
if (enumText.indexOf(globalSearchString)>-1) {
enumValues.add(((Enum)enumConstant).ordinal());
}
}
searchSql.whereIn(attributeName, enumValues).or();
} else if (attributeType == Long.class || attributeType == long.class
|| attributeType == Integer.class || attributeType == int.class
|| attributeType == BigInteger.class || attributeType == BigDecimal.class
|| attributeType == Float.class || attributeType == float.class
|| attributeType == Double.class || attributeType == double.class
|| attributeType == Short.class || attributeType == short.class
) {
// Vorrei fare il match parziale della stringa digitata dentro al valore numerico ma JPA non supporta il like e CONVERT causa un
// java.lang.NullPointerException dentro a org.hibernate.hql.internal.antlr.HqlBaseParser.identPrimary(HqlBaseParser.java:4285)
searchSql.where(globalSearchNumber!=null, attributeName + " = :globalSearchNumber").or();
// yadaSqlBuilder.addWhere(globalSearchNumber!=null, "CONVERT("+attributeName + " USING utf8) like :globalSearchString", "or");
} else {
log.error("Invalid attribute type for {} (skipped) ", attributeName);
}
} catch (Exception e) {
log.error("Can't get attribute type (skipped)", e);
continue;
}
}
}
}
String searchConditions = searchSql.getWhere();
if (StringUtils.isNotBlank(searchConditions)) {
if (StringUtils.isNotBlank(yadaSql.getWhere())) {
yadaSql.and();
}
yadaSql.where("(" + searchConditions + ")").and();
}
// Sorting
boolean needsExtraction = false;
List orderList = yadaDatatablesRequest.getOrder();
if (orderList!=null) {
for (YadaDatatablesOrder yadaDatatablesOrder : orderList) {
int columnIndex = yadaDatatablesOrder.getColumnIndex();
if (columnIndex>=0) {
YadaDatatablesColumn yadaDatatablesColumn = yadaDatatablesColumns.get(columnIndex);
if (yadaDatatablesColumn.isOrderable()) {
String attributeName = yadaDatatablesColumn.getNameOrData();
if (attributeName!=null) {
// Add left joins otherwise Hibernate creates cross joins hence it doesn't return rows with null values
String sortColumn = addLeftJoins(attributeName, yadaSql, targetClass);
yadaSql.orderBy(sortColumn + " " + yadaDatatablesOrder.getDir());
if (attributeName.indexOf('.')>-1) {
yadaSql.selectFrom(sortColumn); // Needed to avoid "ORDER BY clause is not in SELECT list"
needsExtraction = true;
}
// Class attributeType = yadaUtil.getType(targetClass, attributeName);
}
}
}
}
}
yadaSql.setParameter("globalSearchString", "%"+globalSearchString+"%");
yadaSql.setParameter("globalSearchNumber", globalSearchNumber);
Query query = yadaSql.query(em);
query.setMaxResults(yadaDatatablesRequest.getLength());
query.setFirstResult(yadaDatatablesRequest.getStart());
@SuppressWarnings("unchecked")
List result = query.getResultList();
if (needsExtraction) {
// When doing an "order by" on a joined column we add the column to the select clause to prevent the "ORDER BY clause is not in SELECT list" error.
// This means that the result now is a list of Object[] where only the first element is what we need.
@SuppressWarnings("unchecked")
List realResult = (List) result; // Just a type cast
List extractedResult = new ArrayList<>();
for (Object[] arrayResult : realResult) {
extractedResult.add((targetClass) arrayResult[0]);
}
result = extractedResult;
}
// Count con where
yadaSql.toCount(); // Trasforma in un count
query = yadaSql.query(em);
long count = (long) query.getSingleResult();
yadaDatatablesRequest.setRecordsFiltered(count);
// Count senza search
query = countSql.query(em);
count = (long) query.getSingleResult();
yadaDatatablesRequest.setRecordsTotal(count);
return result;
}
/**
* From an attribute with a path, like "location.company.name", inserts needed left joins and returns the last segment "company.name".
* Joins are inserted for all elements before the last dot: "location" and "company" in the example.
* @param attributePath
* @param yadaSqlBuilder
* @return
*/
private String addLeftJoins(String attributePath, YadaSql yadaSqlBuilder, Class targetClass) {
if (attributePath==null) {
return null;
}
return addLeftJoinsRecurse(attributePath, "e", yadaSqlBuilder, targetClass);
}
private String addLeftJoinsRecurse(String attributePath, String context, YadaSql yadaSql, Class contextClass) {
String[] parts = attributePath.split("\\.");
String current = parts[0]; // location
Field currentField = yadaUtil.getFieldNoTraversing(contextClass, current);
Class currentClass = null;
if (currentField!=null) {
currentClass = currentField.getType();
}
if (parts.length>1) { // location.company.name
String alias = context + "_" + current; // Adding the context to the alias to prevent name clashes - TODO maybe all the preceding path should be added?
yadaSql.join("left join " + context + "." + current + " " + alias); // e.location location
if (currentClass.equals(Map.class)) {
// Need to add a condition on the map key. Need to check for null to handle absent data
String keyValue = parts[1]; // en
String whereToAdd = "(KEY("+alias+") is null or KEY("+alias+")='" + keyValue + "')"; // (KEY(name) is null or KEY(name)='en');
if (yadaSql.getWhere().indexOf(whereToAdd)<0) {
yadaSql.where(whereToAdd).and();
}
// If the current attribute is a map, continue only if there is something more after the map key
if (parts.length>2) {
// Need to find the type of the map value in order to set the proper join
ParameterizedType type = (ParameterizedType) currentField.getGenericType();
currentClass = (Class) type.getActualTypeArguments()[1];
// Also skip the key in the path
attributePath = StringUtils.substringAfter(attributePath, "."); // Here we skip the current name, so that below we skip the key of the map
} else {
// No need to go deeper, just return the current attribute alias for sorting.
return alias;
}
}
return addLeftJoinsRecurse(StringUtils.substringAfter(attributePath, "."), alias, yadaSql, currentClass);
// if (!contextClass.equals(Map.class)) {
// attributeClass = field.getType();
// } else {
// // If the targetClass is a map, then the current attribute is the key of the map so there's no need to add a join
// // but we need to know the type of the value in the map.
// // TODO don't we need to add a KEY(current)=:xxx? What would xxx be?
// }
// return addLeftJoinsRecurse(StringUtils.substringAfter(attributePath, "."), current, yadaSql, attributeClass);
} else {
// try {
// Last element of the path - if it's a YadaPersistentEnum we still need a join for the map
// if (yadaUtil.getType(targetClass, attributePath) == YadaPersistentEnum.class) {
if (YadaPersistentEnum.class.equals(currentClass)) {
String alias = attributePath + "_langToText";
yadaSql.join("left join " + context + "." + attributePath + " " + attributePath); // left join user.status status
yadaSql.join("left join " + attributePath + ".langToText " + alias); // left join status.langToText status_langToText
String whereToAdd = "(KEY("+alias+") is null or KEY("+alias+")=:yadalang)";
if (yadaSql.getWhere().indexOf(whereToAdd)<0) {
yadaSql.where(whereToAdd).and();
yadaSql.setParameter("yadalang", LocaleContextHolder.getLocale().getLanguage());
}
return alias;
}
// } catch (NoSuchFieldException e) {
// log.error("No field {} found on class {} (ignored)", attributePath, targetClass.getName());
// }
return context + "." + attributePath; // e.phone, company.name
}
}
}