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/*
* Copyright 2021-2024 FlowCentral Technologies Limited.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.flowcentraltech.flowcentral.connect.springboot.service;
import java.math.BigDecimal;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.annotation.PostConstruct;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.EntityTransaction;
import javax.persistence.Tuple;
import javax.persistence.TypedQuery;
import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaDelete;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Expression;
import javax.persistence.criteria.Order;
import javax.persistence.criteria.Predicate;
import javax.persistence.criteria.Root;
import org.apache.commons.beanutils.PropertyUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.core.env.Environment;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;
import com.flowcentraltech.flowcentral.connect.common.EntityInstFinder;
import com.flowcentraltech.flowcentral.connect.common.constants.RestrictionType;
import com.flowcentraltech.flowcentral.connect.common.data.DataSourceRequest;
import com.flowcentraltech.flowcentral.connect.common.data.DetectEntityRequest;
import com.flowcentraltech.flowcentral.connect.common.data.DetectEntityResponse;
import com.flowcentraltech.flowcentral.connect.common.data.EntityDTO;
import com.flowcentraltech.flowcentral.connect.common.data.EntityFieldInfo;
import com.flowcentraltech.flowcentral.connect.common.data.EntityInfo;
import com.flowcentraltech.flowcentral.connect.common.data.EntityListingDTO;
import com.flowcentraltech.flowcentral.connect.common.data.EntityListingRequest;
import com.flowcentraltech.flowcentral.connect.common.data.EntityListingResponse;
import com.flowcentraltech.flowcentral.connect.common.data.FilterRestrictionDef;
import com.flowcentraltech.flowcentral.connect.common.data.GetEntityRequest;
import com.flowcentraltech.flowcentral.connect.common.data.GetEntityResponse;
import com.flowcentraltech.flowcentral.connect.common.data.JsonDataSourceResponse;
import com.flowcentraltech.flowcentral.connect.common.data.JsonProcedureResponse;
import com.flowcentraltech.flowcentral.connect.common.data.OrderDef;
import com.flowcentraltech.flowcentral.connect.common.data.ProcedureRequest;
import com.flowcentraltech.flowcentral.connect.common.data.QueryDef;
import com.flowcentraltech.flowcentral.connect.common.data.QueryLoadingParams;
import com.flowcentraltech.flowcentral.connect.common.data.ResolvedCondition;
import com.flowcentraltech.flowcentral.connect.common.data.UpdateDef;
import com.flowcentraltech.flowcentral.connect.configuration.constants.ConnectFieldDataType;
import com.flowcentraltech.flowcentral.connect.springboot.SpringBootInterconnect;
import com.tcdng.unify.convert.util.ConverterUtils;
/**
* Implementation of flow central spring boot interconnect service.
*
* @author FlowCentral Technologies Limited
* @since 1.0
*/
@Service
@Transactional(propagation = Propagation.SUPPORTS)
public class SpringBootInterconnectServiceImpl implements SpringBootInterconnectService, EntityInstFinder {
private final Logger LOGGER = Logger.getLogger(SpringBootInterconnectServiceImpl.class.getName());
private final SpringBootInterconnect interconnect;
private final Environment env;
private final ApplicationContext context;
private Map platforms;
private PlatformInfo defaultPlatform;
private boolean logging;
@Autowired
public SpringBootInterconnectServiceImpl(SpringBootInterconnect interconnect, Environment env,
ApplicationContext context) {
this.interconnect = interconnect;
this.platforms = new HashMap();
this.env = env;
this.context = context;
}
@PostConstruct
public void init() throws Exception {
String interconectConfigFile = env.getProperty("flowcentral.interconnect.configfile");
logging = env.getProperty("flowcentral.interconnect.logging.enabled", boolean.class, false);
logInfo("Initializing spring boot interconnect [{0}]...", interconectConfigFile);
interconnect.init(interconectConfigFile, this);
}
@Override
public String getRedirect() {
return interconnect.getRedirect();
}
@SuppressWarnings("unchecked")
@Override
public T findById(EntityInfo entityInfo, Object id) throws Exception {
logInfo("Finding entity [{0}] by ID [{1}]...", new Object[] { entityInfo.getName(), id });
PlatformInfo platform = getPlatform(entityInfo);
T result = null;
EntityManager em = null;
EntityTransaction tx = null;
try {
em = platform.emf.createEntityManager();
tx = em.getTransaction();
tx.begin();
result = em.find((Class) entityInfo.getImplClass(), id);
tx.commit();
em.close();
} catch (Exception e) {
logSevere("Datasource request processing failure.", e);
if (tx != null) {
tx.rollback();
}
} finally {
if (em != null) {
em.close();
}
}
return result;
}
@Override
public DetectEntityResponse detectEntity(DetectEntityRequest req) throws Exception {
logInfo("Detect entity [{0}]...", interconnect.prettyJSON(req));
final boolean present = interconnect.isPresent(req.getEntity());
return new DetectEntityResponse(present);
}
@Override
public GetEntityResponse getEntity(GetEntityRequest req) throws Exception {
logInfo("Get entity [{0}]...", interconnect.prettyJSON(req));
if (interconnect.isPresent(req.getEntity())) {
EntityInfo entityInfo = interconnect.getEntityInfo(req.getEntity());
return new GetEntityResponse(new EntityDTO(entityInfo));
}
return new GetEntityResponse();
}
@Override
public EntityListingResponse listEntities(EntityListingRequest req) throws Exception {
logInfo("List entities [{0}]...", interconnect.prettyJSON(req));
List listings = new ArrayList();
for (String entity : interconnect.getAllEntityNames()) {
listings.add(new EntityListingDTO(entity));
}
return new EntityListingResponse(Collections.emptyList(), listings);
}
@Override
public JsonProcedureResponse executeProcedureRequest(ProcedureRequest req) throws Exception {
if (context.containsBean(req.getOperation())) {
logInfo("Execute procedure request [{0}]...", interconnect.prettyJSON(req));
Object reqBean = req.isUseRawPayload() ? req.getPayload() : interconnect.getBeanFromJsonPayload(req);
SpringBootInterconnectProcedure procedure = context.getBean(req.getOperation(),
SpringBootInterconnectProcedure.class);
procedure.execute(reqBean, req.isReadOnly());
Object[] result = req.isReadOnly() ? null : new Object[] { reqBean };
return interconnect.createProcedureResponse(result, req);
}
return null;
}
@SuppressWarnings({ "rawtypes", "unchecked" })
@Override
public JsonDataSourceResponse processDataSourceRequest(DataSourceRequest req) throws Exception {
if (interconnect.isPresent(req.getEntity())) {
logInfo("Processing datasource request [{0}]...", interconnect.prettyJSON(req));
final EntityInfo entityInfo = interconnect.getEntityInfo(req.getEntity());
PlatformInfo platform = getPlatform(entityInfo);
String errorCode = null;
String errorMsg = null;
EntityManager em = null;
EntityTransaction tx = null;
Object[] result = null;
SpringBootInterconnectEntityDataSourceHandler handler = null;
try {
em = platform.emf.createEntityManager();
tx = em.getTransaction();
tx.begin();
if (entityInfo.isWithHandler() && (handler = context.getBean(entityInfo.getHandler(),
SpringBootInterconnectEntityDataSourceHandler.class)).supports(req)) {
result = handler.process(entityInfo.getImplClass(), req);
} else {
EntityActionPolicy entityActionPolicy = entityInfo.isWithActionPolicy()
? context.getBean(entityInfo.getActionPolicy(), EntityActionPolicy.class)
: null;
switch (req.getOperation()) {
case COUNT_ALL: {
CriteriaQuery cq = createLongQuery(entityInfo.getImplClass(), em, req);
Long count = em.createQuery(cq).getSingleResult();
result = new Object[] { count };
}
break;
case VALIDATE: {
Object reqBean = interconnect.getBeanFromJsonPayload(req);
if (entityActionPolicy != null) {
result = entityActionPolicy.validate(req.getEvalMode(), reqBean);
}
break;
}
case CREATE: {
Object reqBean = interconnect.getBeanFromJsonPayload(req);
if (entityActionPolicy != null) {
entityActionPolicy.executePreCreateAction(reqBean);
}
// em.merge(reqBean);
em.persist(reqBean);
em.flush();
if (entityActionPolicy != null) {
entityActionPolicy.executePostCreateAction(reqBean);
}
Object id = PropertyUtils.getProperty(reqBean, entityInfo.getIdFieldName());
result = new Object[] { id };
}
break;
case DELETE: {
Object reqBean = interconnect.getBeanFromJsonPayload(req);
if (reqBean == null) {
CriteriaQuery cq = createQuery(entityInfo.getImplClass(), em, req);
TypedQuery query = em.createQuery(cq);
List results = query.getResultList();
reqBean = results != null && results.size() == 1 ? results.get(0) : null;
}
if (reqBean == null) {
errorMsg = "Could not find entity to delete.";
} else {
if (req.version() && entityInfo.isWithVersionNo()) {
PropertyUtils.setProperty(reqBean, entityInfo.getVersionNoFieldName(),
req.getVersionNo());
}
if (entityActionPolicy != null) {
entityActionPolicy.executePreDeleteAction(reqBean);
}
em.remove(reqBean);
if (entityActionPolicy != null) {
entityActionPolicy.executePreDeleteAction(reqBean);
}
}
}
break;
case DELETE_ALL: {
CriteriaDelete cd = createDeleteQuery(entityInfo.getImplClass(), em, req);
int count = em.createQuery(cd).executeUpdate();
result = new Object[] { count };
}
break;
case FIND:
case FIND_ALL:
case FIND_LEAN:
case LIST:
case LIST_ALL:
case LIST_LEAN: {
if (req.getOperation().isMultipleResult()) {
if (entityActionPolicy != null) {
QueryLoadingParams queryLoadingParams = interconnect
.getQueryLoadingParams(req.getParams());
entityActionPolicy.executePreSearchAction(queryLoadingParams);
}
}
CriteriaQuery cq = createQuery(entityInfo.getImplClass(), em, req);
TypedQuery query = em.createQuery(cq);
if (req.getOffset() >= 0) {
query.setFirstResult(req.getOffset());
}
if (req.getLimit() > 0) {
query.setMaxResults(req.getLimit());
}
List results = query.getResultList();
if (!req.getOperation().isMultipleResult()) {
if (results.size() > 1) {
throw new RuntimeException(
"Mutiple records found on single item operation on entity ["
+ req.getEntity() + "].");
}
}
result = results.toArray(new Object[results.size()]);
}
break;
case UPDATE:
case UPDATE_EDITABLE_CHILD:
case UPDATE_LEAN: {
Object reqBean = interconnect.getBeanFromJsonPayload(req);
if (reqBean != null) {
Object id = PropertyUtils.getProperty(reqBean, entityInfo.getIdFieldName());
Object saveBean = em.find(entityInfo.getImplClass(), id);
Object versionNo = req.version()
? PropertyUtils.getProperty(saveBean, entityInfo.getVersionNoFieldName())
: null;
// References
interconnect.copy(entityInfo.getRefFieldList(), saveBean, reqBean);
// Fields
interconnect.copy(entityInfo.getFieldList(), saveBean, reqBean);
if (!req.getOperation().isLean()) {
// Child
interconnect.copyChild(entityInfo.getChildFieldList(), req.getEntity(), saveBean,
reqBean);
// Child list
interconnect.copyChildList(entityInfo.getChildListFieldList(), req.getEntity(),
saveBean, reqBean);
}
if (req.version()) {
PropertyUtils.setProperty(saveBean, entityInfo.getVersionNoFieldName(), versionNo);
}
if (entityActionPolicy != null) {
entityActionPolicy.executePreUpdateAction(saveBean);
}
em.merge(saveBean);
if (entityActionPolicy != null) {
entityActionPolicy.executePostUpdateAction(saveBean);
}
result = new Object[] { 1L };
} else if (req.getId() != null && req.getUpdate() != null) {
Object saveBean = em.find(entityInfo.getImplClass(), req.getId());
UpdateDef updateDef = interconnect.getUpdates(req);
for (String fieldName : updateDef.getFieldNames()) {
PropertyUtils.setProperty(saveBean, fieldName, updateDef.getUpdate(fieldName));
}
if (entityActionPolicy != null) {
entityActionPolicy.executePreUpdateAction(saveBean);
}
em.merge(saveBean);
if (entityActionPolicy != null) {
entityActionPolicy.executePostUpdateAction(saveBean);
}
result = new Object[] { 1L };
}
}
break;
case UPDATE_ALL:
break;
case VALUE:
case VALUE_LIST:
case VALUE_SET: {
CriteriaQuery cq = createTupleQuery(entityInfo.getImplClass(), em, req);
cq.distinct(req.getOperation().isDistinct());
List tupleResult = em.createQuery(cq).getResultList();
if (!req.getOperation().isMultipleResult()) {
if (tupleResult.size() > 1) {
throw new RuntimeException(
"Mutiple records found on single item operation on entity ["
+ req.getEntity() + "].");
}
}
result = new Object[tupleResult.size()];
for (int i = 0; i < result.length; i++) {
result[i] = tupleResult.get(i).get(0);
}
}
break;
default:
break;
}
}
JsonDataSourceResponse resp = interconnect.createDataSourceResponse(result, req, errorCode, errorMsg);
logInfo("Returning response [{0}]...", interconnect.prettyJSON(resp));
return resp;
} catch (Exception e) {
logSevere("Datasource request processing failure.", e);
errorMsg = e.getMessage();
if (tx != null) {
tx.rollback();
tx = null;
}
} finally {
if (tx != null) {
tx.commit();
}
if (em != null) {
em.close();
}
}
result = null;
JsonDataSourceResponse resp = interconnect.createDataSourceResponse(result, req, errorCode, errorMsg);
logInfo("Returning response [{0}]...", interconnect.prettyJSON(resp));
return resp;
}
return null;
}
private CriteriaQuery createQuery(Class entityClass, EntityManager em, DataSourceRequest req)
throws Exception {
EntityInfo entityInfo = interconnect.getEntityInfo(req.getEntity());
CriteriaBuilder cb = em.getCriteriaBuilder();
CriteriaQuery cq = cb.createQuery(entityClass);
Root root = cq.from(entityClass);
cq.select(root);
Predicate restrictions = createRestriction(cb, root, entityInfo, req);
if (restrictions != null) {
cq.where(restrictions);
}
List orderDefList = interconnect.getOrderDef(entityInfo, req.getOrder());
if (!orderDefList.isEmpty()) {
List orderList = new ArrayList();
for (OrderDef orderDef : orderDefList) {
if (orderDef.isAscending()) {
orderList.add(cb.asc(root.get(orderDef.getFieldName())));
} else {
orderList.add(cb.desc(root.get(orderDef.getFieldName())));
}
}
cq.orderBy(orderList);
}
return cq;
}
private CriteriaQuery createTupleQuery(Class entityClass, EntityManager em, DataSourceRequest req)
throws Exception {
EntityInfo entityInfo = interconnect.getEntityInfo(req.getEntity());
CriteriaBuilder cb = em.getCriteriaBuilder();
CriteriaQuery cq = cb.createTupleQuery();
Root root = cq.from(entityClass);
cq.multiselect(root.get(req.getFieldName()));
Predicate restrictions = createRestriction(cb, root, entityInfo, req);
if (restrictions != null) {
cq.where(restrictions);
}
return cq;
}
private CriteriaQuery createLongQuery(Class entityClass, EntityManager em, DataSourceRequest req)
throws Exception {
EntityInfo entityInfo = interconnect.getEntityInfo(req.getEntity());
CriteriaBuilder cb = em.getCriteriaBuilder();
CriteriaQuery cq = cb.createQuery(Long.class);
Root root = cq.from(entityClass);
cq.select(cb.count(root));
Predicate restrictions = createRestriction(cb, root, entityInfo, req);
if (restrictions != null) {
cq.where(restrictions);
}
return cq;
}
private CriteriaDelete createDeleteQuery(Class entityClass, EntityManager em, DataSourceRequest req)
throws Exception {
EntityInfo entityInfo = interconnect.getEntityInfo(req.getEntity());
CriteriaBuilder cb = em.getCriteriaBuilder();
CriteriaDelete cq = cb.createCriteriaDelete(entityClass);
Root root = cq.from(entityClass);
Predicate restrictions = createRestriction(cb, root, entityInfo, req);
if (restrictions != null) {
cq.where(restrictions);
}
return cq;
}
private Predicate createRestriction(CriteriaBuilder cb, Root root, EntityInfo entityInfo, DataSourceRequest req)
throws Exception {
Predicate predicate = null;
if (req.byIdOnly()) {
predicate = cb.equal(root.get(entityInfo.getIdFieldName()), req.getId());
} else if (req.byIdVersion()) {
predicate = cb.and(cb.equal(root.get(entityInfo.getIdFieldName()), req.getId()),
cb.equal(root.get(entityInfo.getVersionNoFieldName()), req.getVersionNo()));
} else if (req.byQuery()) {
QueryDef queryDef = interconnect.getQueryDef(req.getQuery());
final int len = queryDef.size();
if (len > 0) {
FilterRestrictionDef fo = queryDef.getFilterRestrictionDef(0);
if (len == 1 && !fo.getType().isCompound()) {
predicate = getSimplePredicate(cb, entityInfo, fo, new Index(root), getNow());
} else {
predicate = addCompoundPredicate(cb, entityInfo, queryDef, fo, new Index(root).set(1), getNow());
}
}
}
if (predicate == null && !req.isIgnoreEmptyCriteria()) {
throw new RuntimeException("Operation on entity [" + req.getEntity() + "] must have a clause.");
}
return predicate;
}
private Date getNow() {
// TODO
return new Date();
}
private Predicate addCompoundPredicate(CriteriaBuilder cb, EntityInfo entityInfo, QueryDef queryDef,
FilterRestrictionDef fo, Index index, Date now) throws Exception {
List predicateList = new ArrayList();
final int len = queryDef.size();
final int depth = fo.getDepth();
int i = index.get();
for (; i < len; i++) {
FilterRestrictionDef sfo = queryDef.getFilterRestrictionDef(i);
if (sfo.getDepth() > depth) {
Predicate predicate = null;
if (sfo.getType().isCompound()) {
predicate = addCompoundPredicate(cb, entityInfo, queryDef, sfo, index.set(i + 1), now);
i = index.get() - 1;
} else {
predicate = getSimplePredicate(cb, entityInfo, sfo, index, now);
}
predicateList.add(predicate);
} else {
break;
}
}
index.set(i);
Predicate[] restrictions = predicateList.toArray(new Predicate[predicateList.size()]);
return RestrictionType.AND.equals(fo.getType()) ? cb.and(restrictions) : cb.or(restrictions);
}
@SuppressWarnings("unchecked")
private Predicate getSimplePredicate(CriteriaBuilder cb, EntityInfo entityInfo, FilterRestrictionDef fo,
Index index, Date now) throws Exception {
EntityFieldInfo _entityFieldInfo = entityInfo.getEntityFieldInfo(fo.getFieldName());
RestrictionType type = fo.getType();
Object paramA = interconnect.resolveSpecialParameter(fo.getParamA());
Object paramB = interconnect.resolveSpecialParameter(fo.getParamB());
if (!type.isFieldVal() && !type.isParameterVal()) {
if (type.isLingual() && _entityFieldInfo.isString()) {
ResolvedCondition resolved = interconnect.resolveLingualStringCondition(_entityFieldInfo, now, type,
paramA, paramB);
type = resolved.getType();
paramA = resolved.getParamA();
paramB = resolved.getParamB();
} else if (_entityFieldInfo.isDate() || _entityFieldInfo.isTimestamp()) {
ResolvedCondition resolved = interconnect.resolveDateCondition(_entityFieldInfo, now, type, paramA,
paramB);
type = resolved.getType();
paramA = resolved.getParamA();
paramB = resolved.getParamB();
} else {
ConnectFieldDataType connectFieldDataType = _entityFieldInfo.getType();
Class javaClass = connectFieldDataType.javaClass();
if (paramA != null) {
if (type.isAmongst()) {
paramA = ConverterUtils.convert(List.class, javaClass,
Arrays.asList(interconnect.breakdownCollectionString((String) paramA)));
} else {
paramA = ConverterUtils.convert(javaClass, paramA);
}
}
if (paramB != null) {
paramB = ConverterUtils.convert(javaClass, paramB);
}
}
}
if (_entityFieldInfo.isEnum()) {
paramA = paramA instanceof List
? ConverterUtils.convert(List.class, _entityFieldInfo.getEnumImplClass(), paramA)
: ConverterUtils.convert(_entityFieldInfo.getEnumImplClass(), paramA);
paramB = ConverterUtils.convert(_entityFieldInfo.getEnumImplClass(), paramB);
}
final String fieldName = entityInfo.getLocalFieldName(fo.getFieldName());
switch (type) {
case AMONGST:
return index.getRoot().get(fieldName).in((Collection) paramA);
case AND:
break;
case BEGINS_WITH:
return cb.like(index.getRoot().get(fieldName), paramA + "%");
case BEGINS_WITH_FIELD:
break;
case BEGINS_WITH_PARAM:
break;
case BETWEEN:
if (_entityFieldInfo.isDate() || _entityFieldInfo.isTimestamp()) {
return cb.between(index.getRoot().get(fieldName), (Date) paramA, (Date) paramB);
}
if (_entityFieldInfo.isInteger()) {
return cb.between(index.getRoot().get(fieldName), ConverterUtils.convert(Long.class, paramA),
ConverterUtils.convert(Long.class, paramB));
}
if (_entityFieldInfo.isDouble()) {
return cb.between(index.getRoot().get(fieldName), ConverterUtils.convert(Double.class, paramA),
ConverterUtils.convert(Double.class, paramB));
}
if (_entityFieldInfo.isDecimal()) {
return cb.between(index.getRoot().get(fieldName), (BigDecimal) paramA, (BigDecimal) paramB);
}
break;
case BETWEEN_FIELD:
break;
case BETWEEN_PARAM:
break;
case ENDS_WITH:
return cb.like(index.getRoot().get(fieldName), "%" + paramA);
case ENDS_WITH_FIELD:
break;
case ENDS_WITH_PARAM:
break;
case EQUALS:
return cb.equal(index.getRoot().get(fieldName), paramA);
case EQUALS_COLLECTION:
break;
case EQUALS_FIELD:
break;
case EQUALS_LINGUAL:
return cb.equal(index.getRoot().get(fieldName), paramA);
case EQUALS_PARAM:
break;
case GREATER_OR_EQUAL:
if (_entityFieldInfo.isDate() || _entityFieldInfo.isTimestamp()) {
return cb.greaterThanOrEqualTo(index.getRoot().get(fieldName), (Date) paramA);
}
if (_entityFieldInfo.isInteger()) {
return cb.greaterThanOrEqualTo(index.getRoot().get(fieldName),
ConverterUtils.convert(Long.class, paramA));
}
if (_entityFieldInfo.isDouble()) {
return cb.greaterThanOrEqualTo(index.getRoot().get(fieldName),
ConverterUtils.convert(Double.class, paramA));
}
if (_entityFieldInfo.isDecimal()) {
return cb.greaterThanOrEqualTo(index.getRoot().get(fieldName), (BigDecimal) paramA);
}
break;
case GREATER_OR_EQUAL_COLLECTION:
break;
case GREATER_OR_EQUAL_FIELD:
break;
case GREATER_OR_EQUAL_LINGUAL:
break;
case GREATER_OR_EQUAL_PARAM:
break;
case GREATER_THAN:
if (_entityFieldInfo.isDate() || _entityFieldInfo.isTimestamp()) {
return cb.greaterThan(index.getRoot().get(fieldName), (Date) paramA);
}
if (_entityFieldInfo.isInteger()) {
return cb.greaterThan(index.getRoot().get(fieldName), ConverterUtils.convert(Long.class, paramA));
}
if (_entityFieldInfo.isDouble()) {
return cb.greaterThan(index.getRoot().get(fieldName), ConverterUtils.convert(Double.class, paramA));
}
if (_entityFieldInfo.isDecimal()) {
return cb.greaterThan(index.getRoot().get(fieldName), (BigDecimal) paramA);
}
break;
case GREATER_THAN_COLLECTION:
break;
case GREATER_THAN_FIELD:
break;
case GREATER_THAN_LINGUAL:
break;
case GREATER_THAN_PARAM:
break;
case IBEGINS_WITH:
paramA = paramToLowerCase(paramA);
return cb.like(lowerCriterion(cb, index, paramA, fieldName), paramA + "%");
case IBEGINS_WITH_FIELD:
break;
case IBEGINS_WITH_PARAM:
break;
case IENDS_WITH:
paramA = paramToLowerCase(paramA);
return cb.like(lowerCriterion(cb, index, paramA, fieldName), "%" + paramA);
case IENDS_WITH_FIELD:
break;
case IENDS_WITH_PARAM:
break;
case IEQUALS:
paramA = paramToLowerCase(paramA);
return cb.equal(lowerCriterion(cb, index, paramA, fieldName), paramA);
case ILIKE:
paramA = paramToLowerCase(paramA);
return cb.like(lowerCriterion(cb, index, paramA, fieldName), "%" + paramA + "%");
case ILIKE_FIELD:
break;
case ILIKE_PARAM:
break;
case INOT_EQUALS:
paramA = paramToLowerCase(paramA);
return cb.equal(lowerCriterion(cb, index, paramA, fieldName), paramA).not();
case IS_NOT_NULL:
return cb.isNotNull(index.getRoot().get(fieldName));
case IS_NULL:
return cb.isNull(index.getRoot().get(fieldName));
case LESS_OR_EQUAL:
if (_entityFieldInfo.isDate() || _entityFieldInfo.isTimestamp()) {
return cb.lessThanOrEqualTo(index.getRoot().get(fieldName), (Date) paramA);
}
if (_entityFieldInfo.isInteger()) {
return cb.lessThanOrEqualTo(index.getRoot().get(fieldName),
ConverterUtils.convert(Long.class, paramA));
}
if (_entityFieldInfo.isDouble()) {
return cb.lessThanOrEqualTo(index.getRoot().get(fieldName),
ConverterUtils.convert(Double.class, paramA));
}
if (_entityFieldInfo.isDecimal()) {
return cb.lessThanOrEqualTo(index.getRoot().get(fieldName), (BigDecimal) paramA);
}
break;
case LESS_OR_EQUAL_COLLECTION:
break;
case LESS_OR_EQUAL_FIELD:
break;
case LESS_OR_EQUAL_LINGUAL:
break;
case LESS_OR_EQUAL_PARAM:
break;
case LESS_THAN:
if (_entityFieldInfo.isDate() || _entityFieldInfo.isTimestamp()) {
return cb.lessThan(index.getRoot().get(fieldName), (Date) paramA);
}
if (_entityFieldInfo.isInteger()) {
return cb.lessThan(index.getRoot().get(fieldName), ConverterUtils.convert(Long.class, paramA));
}
if (_entityFieldInfo.isDouble()) {
return cb.lessThan(index.getRoot().get(fieldName), ConverterUtils.convert(Double.class, paramA));
}
if (_entityFieldInfo.isDecimal()) {
return cb.lessThan(index.getRoot().get(fieldName), (BigDecimal) paramA);
}
break;
case LESS_THAN_COLLECTION:
break;
case LESS_THAN_FIELD:
break;
case LESS_THAN_LINGUAL:
break;
case LESS_THAN_PARAM:
break;
case LIKE:
return cb.like(index.getRoot().get(fieldName), "%" + paramA + "%");
case LIKE_FIELD:
break;
case LIKE_PARAM:
break;
case NOT_AMONGST:
return index.getRoot().get(fieldName).in((Collection) paramA).not();
case NOT_BEGIN_WITH:
return cb.like(index.getRoot().get(fieldName), paramA + "%").not();
case NOT_BEGIN_WITH_FIELD:
break;
case NOT_BEGIN_WITH_PARAM:
break;
case NOT_BETWEEN:
if (_entityFieldInfo.isDate() || _entityFieldInfo.isTimestamp()) {
return cb.between(index.getRoot().get(fieldName), (Date) paramA, (Date) paramB).not();
}
if (_entityFieldInfo.isInteger()) {
return cb.between(index.getRoot().get(fieldName), ConverterUtils.convert(Long.class, paramA),
ConverterUtils.convert(Long.class, paramB)).not();
}
if (_entityFieldInfo.isDouble()) {
return cb.between(index.getRoot().get(fieldName), ConverterUtils.convert(Double.class, paramA),
ConverterUtils.convert(Double.class, paramB)).not();
}
if (_entityFieldInfo.isDecimal()) {
return cb.between(index.getRoot().get(fieldName), (BigDecimal) paramA, (BigDecimal) paramB).not();
}
break;
case NOT_BETWEEN_FIELD:
break;
case NOT_BETWEEN_PARAM:
break;
case NOT_END_WITH:
return cb.like(index.getRoot().get(fieldName), "%" + paramA).not();
case NOT_END_WITH_FIELD:
break;
case NOT_END_WITH_PARAM:
break;
case NOT_EQUALS:
return cb.equal(index.getRoot().get(fieldName), paramA).not();
case NOT_EQUALS_COLLECTION:
break;
case NOT_EQUALS_FIELD:
break;
case NOT_EQUALS_LINGUAL:
break;
case NOT_EQUALS_PARAM:
break;
case NOT_LIKE:
return cb.like(index.getRoot().get(fieldName), "%" + paramA + "%").not();
case NOT_LIKE_FIELD:
break;
case NOT_LIKE_PARAM:
break;
case OR:
break;
default:
break;
}
return null;
}
private class Index {
private final Root root;
private int i;
public Index(Root root) {
this.root = root;
}
public Root getRoot() {
return root;
}
public int get() {
return i;
}
public Index set(int i) {
this.i = i;
return this;
}
}
private void logInfo(String message, Object... params) {
if (logging) {
LOGGER.log(Level.INFO, message, params);
}
}
private void logSevere(String message, Exception e) {
LOGGER.log(Level.SEVERE, message, e);
}
@SuppressWarnings({ "unchecked", "rawtypes" })
private Object paramToLowerCase(Object param) {
return param != null && param.getClass().isEnum()
? Enum.valueOf((Class) param.getClass(), param.toString())
: ((String) param).toLowerCase();
}
private Expression lowerCriterion(CriteriaBuilder cb, Index index, Object param, String fieldName) {
return param != null && param.getClass().isEnum() ? index.getRoot().get(fieldName)
: cb.lower(index.getRoot().get(fieldName));
}
private PlatformInfo getPlatform(EntityInfo entityInfo) {
if (entityInfo.getEntityManagerFactory() != null) {
PlatformInfo platform = platforms.get(entityInfo.getEntityManagerFactory());
if (platform == null) {
synchronized (this) {
if (platform == null) {
EntityManagerFactory emf = context.getBean(entityInfo.getEntityManagerFactory(),
EntityManagerFactory.class);
platform = new PlatformInfo(emf);
platforms.put(entityInfo.getEntityManagerFactory(), platform);
}
}
}
return platform;
}
if (defaultPlatform == null) {
synchronized (this) {
if (defaultPlatform == null) {
EntityManagerFactory emf = context.getBean(EntityManagerFactory.class);
defaultPlatform = new PlatformInfo(emf);
}
}
}
return defaultPlatform;
}
private class PlatformInfo {
private final EntityManagerFactory emf;
private PlatformInfo(EntityManagerFactory emf) {
this.emf = emf;
}
}
}