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RePlay is a fork of the Play1 framework, created by Codeborne.
package play.db.jpa;
import org.apache.commons.lang3.StringUtils;
import play.db.Model;
import play.data.binding.BeanWrapper;
import play.data.binding.Binder;
import play.data.binding.BindingAnnotations;
import play.data.binding.ParamNode;
import play.data.validation.Validation;
import play.exceptions.UnexpectedException;
import play.mvc.Http;
import play.mvc.Scope;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import jakarta.persistence.*;
import java.lang.annotation.Annotation;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.ParameterizedType;
import java.util.*;
/**
* A super class for JPA entities
*/
@MappedSuperclass
@SuppressWarnings("unchecked")
public class GenericModel extends JPABase {
/**
* Create a new model
*
* @param rootParamNode
* parameters used to create the new object
* @param name
* name of the object
* @param type
* the class of the object
* @param annotations
* annotations on the model
* @param
* The entity class
* @return The created entity
*/
@Nonnull
public static T create(Http.Request request, Scope.Session session, ParamNode rootParamNode, String name, Class type, Annotation[] annotations) {
try {
Constructor c = type.getDeclaredConstructor();
c.setAccessible(true);
Object model = c.newInstance();
return edit(request, session, rootParamNode, name, model, annotations);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
/**
* Edit a model
*
* @param rootParamNode
* parameters used to create the new object
* @param name
* name of the object
* @param o
* the entity to update
* @param annotations
* annotations on the model
* @param
* class of the entity
* @return the entity
*/
@Nonnull
public static T edit(Http.Request request, Scope.Session session, ParamNode rootParamNode, String name, Object o, Annotation[] annotations) {
return edit(request, session, JPA.DEFAULT, rootParamNode, name, o, annotations);
}
/**
* Edit a model
*
* @param dbName
* the db name
* @param rootParamNode
* parameters used to create the new object
* @param name
* name of the object
* @param o
* the entity to update
* @param annotations
* annotations on the model
* @param
* class of the entity
* @return the entity
*/
@Nonnull
private static T edit(Http.Request request, Scope.Session session, String dbName, ParamNode rootParamNode, String name, @Nonnull Object o, Annotation[] annotations) {
// #1601 - If name is empty, we're dealing with "root" request parameters (without prefixes).
// Must not call rootParamNode.getChild in that case, as it returns null. Use rootParamNode itself instead.
ParamNode paramNode = StringUtils.isEmpty(name) ? rootParamNode : rootParamNode.getChild(name, true);
// #1195 - Needs to keep track of which keys we remove so that we can restore it before
// returning from this method.
List removedNodesList = new ArrayList<>();
try {
BeanWrapper bw = new BeanWrapper(o.getClass());
// Start with relations
Set fields = new HashSet<>();
Class clazz = o.getClass();
while (!clazz.equals(Object.class)) {
Collections.addAll(fields, clazz.getDeclaredFields());
clazz = clazz.getSuperclass();
}
for (Field field : fields) {
boolean isEntity = false;
String relation = null;
boolean multiple = false;
// First try the field
Annotation[] fieldAnnotations = field.getAnnotations();
// and check with the profiles annotations
BindingAnnotations bindingAnnotations = new BindingAnnotations(fieldAnnotations,
new BindingAnnotations(annotations).getProfiles());
if (bindingAnnotations.checkNoBinding()) {
continue;
}
if (field.isAnnotationPresent(OneToOne.class) || field.isAnnotationPresent(ManyToOne.class)) {
isEntity = true;
relation = field.getType().getName();
}
if (field.isAnnotationPresent(OneToMany.class) || field.isAnnotationPresent(ManyToMany.class)) {
Class fieldType = (Class) ((ParameterizedType) field.getGenericType()).getActualTypeArguments()[0];
isEntity = true;
relation = fieldType.getName();
multiple = true;
}
if (isEntity) {
ParamNode fieldParamNode = paramNode.getChild(field.getName(), true);
Class c = loadClass(relation);
if (JPABase.class.isAssignableFrom(c)) {
String keyName = Model.Manager.factoryFor(c).keyName();
if (multiple && Collection.class.isAssignableFrom(field.getType())) {
Collection l = new ArrayList<>();
if (SortedSet.class.isAssignableFrom(field.getType())) {
l = new TreeSet();
} else if (Set.class.isAssignableFrom(field.getType())) {
l = new HashSet();
}
String[] ids = fieldParamNode.getChild(keyName, true).getValues();
if (ids != null) {
// Remove it to prevent us from finding it again later
fieldParamNode.removeChild(keyName, removedNodesList);
for (String _id : ids) {
if (_id == null || _id.equals("")) {
continue;
}
Query q = JPA.em(dbName).createQuery("from " + relation + " where " + keyName + " = ?1");
q.setParameter(1, Binder.directBind(rootParamNode.getOriginalKey(), request, session, annotations, _id,
Model.Manager.factoryFor(loadClass(relation)).keyType(), null));
try {
l.add(q.getSingleResult());
} catch (NoResultException e) {
Validation.addError(name + "." + field.getName(), "validation.notFound", _id);
}
}
bw.set(field.getName(), o, l);
}
} else {
String[] ids = fieldParamNode.getChild(keyName, true).getValues();
if (ids != null && ids.length > 0 && !ids[0].equals("")) {
Query q = JPA.em(dbName).createQuery("from " + relation + " where " + keyName + " = ?1");
q.setParameter(1, Binder.directBind(rootParamNode.getOriginalKey(), request, session, annotations, ids[0],
Model.Manager.factoryFor(loadClass(relation)).keyType(), null));
try {
Object to = q.getSingleResult();
edit(request, session, paramNode, field.getName(), to, field.getAnnotations());
// Remove it to prevent us from finding it again later
paramNode.removeChild(field.getName(), removedNodesList);
bw.set(field.getName(), o, to);
} catch (NoResultException e) {
Validation.addError(fieldParamNode.getOriginalKey(), "validation.notFound", ids[0]);
// Remove only the key to prevent us from finding it again later
// This how the old impl does it..
fieldParamNode.removeChild(keyName, removedNodesList);
if (fieldParamNode.getAllChildren().size() == 0) {
// remove the whole node..
paramNode.removeChild(field.getName(), removedNodesList);
}
}
} else if (ids != null && ids.length > 0 && ids[0].equals("")) {
bw.set(field.getName(), o, null);
// Remove the key to prevent us from finding it again later
fieldParamNode.removeChild(keyName, removedNodesList);
}
}
}
}
}
// #1601 - If name is empty, we're dealing with "root" request parameters (without prefixes).
// Must not call rootParamNode.getChild in that case, as it returns null. Use rootParamNode itself instead.
ParamNode beanNode = StringUtils.isEmpty(name) ? rootParamNode : rootParamNode.getChild(name, true);
Binder.bindBean(request, session, beanNode, o, annotations);
return (T) o;
} catch (Exception e) {
throw new UnexpectedException(e);
} finally {
// restoring changes to paramNode
ParamNode.restoreRemovedChildren(removedNodesList);
}
}
@Nonnull
private static Class loadClass(String className) throws ClassNotFoundException {
return (Class) Thread.currentThread().getContextClassLoader().loadClass(className);
}
/**
* Edit a model
*
* @param rootParamNode
* parameters used to create the new object
* @param name
* name of the entity
* @param
* class of the entity
* @return the entity
*/
@Nonnull
public T edit(Http.Request request, Scope.Session session, ParamNode rootParamNode, String name) {
edit(request, session, rootParamNode, name, this, null);
return (T) this;
}
@Nonnull
public T save() {
_save();
return (T) this;
}
/**
* Merge this object to obtain a managed entity (useful when the object comes from the Cache).
*
* @param
* class of the entity
* @return The given entity
*/
@Nonnull
public T merge() {
return (T) em(JPA.getDBName(this.getClass())).merge(this);
}
/**
* Delete the entity.
*
* @param
* class of the entity
* @return The deleted entity.
*/
@Nonnull
public T delete() {
_delete();
return (T) this;
}
public static class JPAQuery {
public Query query;
public String sq;
public JPAQuery(String sq, Query query) {
this.query = query;
this.sq = sq;
}
public JPAQuery(Query query) {
this.query = query;
this.sq = query.toString();
}
@Nullable
public T first() {
try {
List results = query.setMaxResults(1).getResultList();
if (results.isEmpty()) {
return null;
}
return results.get(0);
} catch (Exception e) {
throw new JPAQueryException("Error while executing query " + sq + "", JPAQueryException.findBestCause(e));
}
}
/**
* Bind a JPQL named parameter to the current query. Careful, this will also bind count results. This means that
* Integer get transformed into long so hibernate can do the right thing. Use the setParameter if you just want
* to set parameters.
*
* @param name
* name of the object
* @param param
* current query
* @return The query
*/
@Nonnull
public JPAQuery bind(String name, Object param) {
if (param.getClass().isArray()) {
param = Arrays.asList((Object[]) param);
}
if (param instanceof Integer) {
param = ((Integer) param).longValue();
}
query.setParameter(name, param);
return this;
}
/**
* Set a named parameter for this query.
*
* @param name
* Parameter name
* @param param
* The given parameters
* @return The query
*/
@Nonnull
public JPAQuery setParameter(String name, Object param) {
query.setParameter(name, param);
return this;
}
/**
* Retrieve all results of the query
*
* @param
* the type of the entity
* @return A list of entities
*/
@Nonnull
public List fetch() {
try {
return query.getResultList();
} catch (Exception e) {
throw new JPAQueryException("Error while executing query " + sq + "", JPAQueryException.findBestCause(e));
}
}
/**
* Retrieve results of the query
*
* @param max
* Max results to fetch
* @param
* The entity class
* @return A list of entities
*/
@Nonnull
public List fetch(int max) {
try {
query.setMaxResults(max);
return query.getResultList();
} catch (Exception e) {
throw new JPAQueryException("Error while executing query " + sq + "", JPAQueryException.findBestCause(e));
}
}
/**
* Set the position to start
*
* @param position
* Position of the first element
* @return A new query
*/
@Nonnull
public JPAQuery from(int position) {
query.setFirstResult(position);
return this;
}
/**
* Retrieve a page of result
*
* @param page
* Page number (start at 1)
* @param length
* (page length)
* @param
* The entity class
* @return a list of entities
*/
@Nonnull
public List fetch(int page, int length) {
if (page < 1) {
page = 1;
}
query.setFirstResult((page - 1) * length);
query.setMaxResults(length);
try {
return query.getResultList();
} catch (Exception e) {
throw new JPAQueryException("Error while executing query " + sq + "", JPAQueryException.findBestCause(e));
}
}
}
}
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