public class GwtRpcController extends RemoteServiceServlet implements Controller, ServletContextAware {

    private ServletContext servletContext;

    private RemoteService remoteService;

    private Class remoteServiceClass;

    @Override
    public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws Exception {
        super.doPost(request, response);
        return null;
    }

    @Override
    public String processCall(String payload) throws SerializationException {
        try {
            
            PortalLegacySerializationPolicy legacySerializationPolicy = new PortalLegacySerializationPolicy(); 
            RPCRequest rpcRequest = RPC.decodeRequest(payload, this.remoteServiceClass);
            // delegate work to the spring injected service
            
            
            return RPC.invokeAndEncodeResponse(this.remoteService, rpcRequest.getMethod(), rpcRequest.getParameters() , legacySerializationPolicy);
        } catch (IncompatibleRemoteServiceException ex) {
            getServletContext().log("An IncompatibleRemoteServiceException was thrown while processing this call.", ex);
            return RPC.encodeResponseForFailure(null, ex);
        }
    }

    @Override
    public ServletContext getServletContext() {
        return servletContext;
    }

    @Override
    public void setServletContext(ServletContext servletContext) {
        this.servletContext = servletContext;
    }

    public void setRemoteService(RemoteService remoteService) {
        this.remoteService = remoteService;
        this.remoteServiceClass = this.remoteService.getClass();
    }

}

RPCRequest rpcRequest = RPC.decodeRequest(payload, this.remoteServiceClass); 

RPCRequest rpcRequest = RPC.decodeRequest(payload, this.remoteServiceClass, this);

return RPC.invokeAndEncodeResponse(...)

public class PortalLegacySerializationPolicy extends SerializationPolicy implements TypeNameObfuscator {

    LegacySerializationPolicy legacy = LegacySerializationPolicy.getInstance();

    @Override
    public boolean shouldDeserializeFields(Class<?> clazz) {
        if (Serializable.class.isAssignableFrom(clazz)) {
            return true;
        }
        return legacy.shouldDeserializeFields(clazz);
    }

    @Override
    public boolean shouldSerializeFields(Class<?> clazz) {
       return legacy.shouldSerializeFields(clazz);
    }

    @Override
    public void validateDeserialize(Class<?> clazz) throws SerializationException {
        legacy.validateDeserialize(clazz);
    }

    @Override
    public void validateSerialize(Class<?> clazz) throws SerializationException {
        legacy.validateSerialize(clazz);
    }

    @Override
    public String getClassNameForTypeId(String id) throws SerializationException {
        return legacy.getClassNameForTypeId(id);
    }

    @Override
    public String getTypeIdForClass(Class<?> clazz) throws SerializationException {
        return legacy.getTypeIdForClass(clazz);
    }

}

RPCRequest rpcRequest = RPC.decodeRequest(payload, this.remoteServiceClass, new  SerializationPolicyProvider {
  SerializationPolicy getSerializationPolicy(String moduleBaseURL,String serializationPolicyStrongName){
     return legacySerializationPolicy;
  })

    public void setRemoteService(RemoteService remoteService) {
        Field fDelegate = myClass.getClass().getDeclaredField("delegate");
        fDelegate.setAccessible(true);
        fDelegate.set(this,remoteService); 
    }

public class GwtRpcController extends RemoteServiceServlet implements Controller, ServletContextAware {

    private ServletContext servletContext;

    private RemoteService remoteService;

    private Class remoteServiceClass;

    @Override
    public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws Exception {
        super.doPost(request, response);
        return null;
    }

    @Override
    public String processCall(String payload) throws SerializationException {
        try {
            RPCRequest rpcRequest = RPC.decodeRequest(payload, this.remoteServiceClass , this);
            // delegate work to the spring injected service
            onAfterRequestDeserialized(rpcRequest);
            return  RPC.invokeAndEncodeResponse(this.remoteService, rpcRequest.getMethod(), rpcRequest.getParameters() ,rpcRequest.getSerializationPolicy());
        } catch (IncompatibleRemoteServiceException ex) {
            getServletContext().log("An IncompatibleRemoteServiceException was thrown while processing this call.", ex);
            return RPC.encodeResponseForFailure(null, ex);
        }
    }

    @Override
    public ServletContext getServletContext() {
        return servletContext;
    }

    @Override
    public void setServletContext(ServletContext servletContext) {
        this.servletContext = servletContext;
    }

    public void setRemoteService(RemoteService remoteService) {
        this.remoteService = remoteService;
        this.remoteServiceClass = this.remoteService.getClass();
    }

        ListStore<M> store = new ListStore<M>(new ModelKeyProvider<M>() {
            @Override
            public String getKey(M item) {
                GWT.log(item.toString());
//                if (item instanceof <YourCustomerClass>) {
//                    return ((YourCustomerClass) item).getId();
//                }
                return null;
            }
        });

    @Override
    public PagingLoadResult<Map<String, String>> fetchTableOrViewData(PagingLoadConfig config, String tableOrViewName) {
        //List<? extends SortInfo> sortList = config.getSortInfo();
        //Sort sort = new Sort(Sort.Direction.DESC, "login");
        int page = (config.getLimit() != 0 && config.getOffset() > 0) ? (config.getOffset() / config.getLimit()) : 0;
        Pageable pageable = new PageRequest(page, config.getLimit()); //TODO sort + page size + тут мощный сb 
        //Page<User> list = userService.findAll(pageable); ???
        Map<String, String> map = new HashMap<>();
        return new PagingLoadResultBean(list.getContent(), (int) list.getTotalElements(), config.getOffset());
    }

package ru.portal.services;

import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import javax.persistence.Column;
import javax.persistence.EntityManager;
import javax.persistence.Id;
import javax.persistence.PersistenceContext;
import javax.persistence.TypedQuery;
import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Root;
import javax.persistence.metamodel.EntityType;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageImpl;
import org.springframework.data.domain.Pageable;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import ru.portal.interfaces.PortalTable;

@Service
@Transactional
public class TableServiceImpl implements TableService {

   @PersistenceContext
    private EntityManager em;

   @Override
    public Page<List<String>> findAll(String tableOrViewName, Pageable pageable) {
        List<List<String>> result = new ArrayList<>();
        EntityType<?> type = null;
        Set<EntityType<?>> set = em.getEntityManagerFactory().getMetamodel().getEntities();
        for (EntityType<?> entityType : set) {
            if (entityType.getBindableJavaType().getAnnotation(PortalTable.class) != null) {
                if (entityType.getBindableJavaType().getName().equals(tableOrViewName)) {
                    type = entityType;
                    break;
                }
            }
        }

        if (type != null) {
            Class<?> bindableJavaType = type.getBindableJavaType();
            CriteriaBuilder cb = em.getCriteriaBuilder();
            CriteriaQuery<?> cq = cb.createQuery(bindableJavaType);
            Root<?> root = cq.from(bindableJavaType);
//          cq.select(root);
            TypedQuery<?> q = em.createQuery(cq);
            List<?> all = q.getResultList();

        }

        //TODO 
        int total = 0;
        PageImpl<List<String>> list = new PageImpl<>(result, pageable, total);
        return list;
    }

}

    @Override
    public Page<List<String>> findAll(String tableOrViewName, Pageable pageable) {
        List<List<String>> result = new ArrayList<>();
        EntityType<?> type = null;
        Set<EntityType<?>> set = em.getEntityManagerFactory().getMetamodel().getEntities();
        for (EntityType<?> entityType : set) {
            if (entityType.getBindableJavaType().getAnnotation(PortalTable.class) != null) {
                if (entityType.getBindableJavaType().getName().equals(tableOrViewName)) {
                    type = entityType;
                    break;
                }
            }
        }

        Long totalRows = 0L;
        
        if (type != null) {
            Class<?> bindableJavaType = type.getBindableJavaType();
          
            //count
            CriteriaBuilder criteriaBuilder = em.getCriteriaBuilder();
            CriteriaQuery<Long> countQuery = criteriaBuilder.createQuery(Long.class);
            countQuery.select(criteriaBuilder.count(countQuery.from(bindableJavaType)));
            totalRows =  em.createQuery(countQuery).getSingleResult();

            //select
            CriteriaBuilder cb = em.getCriteriaBuilder();
            CriteriaQuery<?> cq = cb.createQuery(bindableJavaType);
            Root<?> root = cq.from(bindableJavaType);
//          cq.select(root);
            if(pageable == null){
                pageable = new PageRequest(0, 50);
            }
            
            TypedQuery<?> query = em.createQuery(cq);
            
            query.setFirstResult(pageable.getPageNumber() * pageable.getPageSize());
            query.setMaxResults(pageable.getPageSize());
            List<?> all = query.getResultList();
            
     

        }

        
        PageImpl<List<String>> list = new PageImpl<>(result, pageable, totalRows);
        
        return list;
    }

    @Override
    public PagingLoadResult<Map<String, String>> fetchTableOrViewData(PagingLoadConfig config, String tableOrViewName) {
        //List<? extends SortInfo> sortList = config.getSortInfo();
        //Sort sort = new Sort(Sort.Direction.DESC, "login");
        int page = (config.getLimit() != 0 && config.getOffset() > 0) ? (config.getOffset() / config.getLimit()) : 0;
        Pageable pageable = new PageRequest(page, config.getLimit()); //TODO sort + page size + тут мощный сb 
        Page<List<String>> result = tableService.findAll(tableOrViewName , pageable);
        result.getContent();
        return new PagingLoadResultBean(null, (int) result.getTotalElements(), config.getOffset());
    }

    @Override
    public PagingLoadResult<Map<String, String>> fetchTableOrViewData(PagingLoadConfig config, String tableOrViewName) {
        //List<? extends SortInfo> sortList = config.getSortInfo();
        //Sort sort = new Sort(Sort.Direction.DESC, "login");
        int page = (config.getLimit() != 0 && config.getOffset() > 0) ? (config.getOffset() / config.getLimit()) : 0;
        Pageable pageable = new PageRequest(page, config.getLimit()); //TODO sort + page size + тут мощный сb 
        Page<Map<String, String>> result = tableService.findAll(tableOrViewName , pageable);
        result.getContent();
        return new PagingLoadResultBean(result.getContent(), (int) result.getTotalElements(), config.getOffset());
    }

2015-10-14 12:37:40.699:WARN:/:qtp142993407-32: Exception while dispatching incoming RPC call
com.google.gwt.user.client.rpc.SerializationException: Type 'java.util.Collections$UnmodifiableRandomAccessList' was not included in the set of types which can be serialized by this SerializationPolicy or its Class object could not be loaded. For security purposes, this type will not be serialized.: instance = [{rolename=ROLE_ADMIN, id=1}, {rolename=ROLE_USER, id=2}]
	at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serialize(ServerSerializationStreamWriter.java:667)
	at com.google.gwt.user.client.rpc.impl.AbstractSerializationStreamWriter.writeObject(AbstractSerializationStreamWriter.java:130)
	at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter$ValueWriter$8.write(ServerSerializationStreamWriter.java:153)
	at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeValue(ServerSerializationStreamWriter.java:587)
	at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeClass(ServerSerializationStreamWriter.java:758)
	at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeImpl(ServerSerializationStreamWriter.java:797)
	at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeClass(ServerSerializationStreamWriter.java:770)
	at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeImpl(ServerSerializationStreamWriter.java:797)
	at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serialize(ServerSerializationStreamWriter.java:669)
	at com.google.gwt.user.client.rpc.impl.AbstractSerializationStreamWriter.writeObject(AbstractSerializationStreamWriter.java:130)
	at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter$ValueWriter$8.write(ServerSerializationStreamWriter.java:153)
	at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeValue(ServerSerializationStreamWriter.java:587)
	at com.google.gwt.user.server.rpc.RPC.encodeResponse(RPC.java:631)
	at com.google.gwt.user.server.rpc.RPC.encodeResponseForSuccess(RPC.java:497)
	at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:589)
	at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:571)
	at ru.portal.gwt.gwtportal.server.GwtRpcController.processCall(GwtRpcController.java:48)
	at com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java:373)
	at com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:62)
	at ru.portal.gwt.gwtportal.server.GwtRpcController.handleRequest(GwtRpcController.java:38)
	at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:50)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:943)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:877)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:966)
	at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:868)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
	at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:816)
	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:583)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
	at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548)
	at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:226)
	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1114)
	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:511)
	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1048)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
	at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:213)
	at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:109)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:119)
	at org.eclipse.jetty.server.Server.handle(Server.java:517)
	at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:302)
	at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:242)
	at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:245)
	at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:95)
	at org.eclipse.jetty.io.SelectChannelEndPoint$2.run(SelectChannelEndPoint.java:75)
	at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceAndRun(ExecuteProduceConsume.java:213)
	at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:147)
	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:654)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:572)
	at java.lang.Thread.run(Thread.java:745)

return new PagingLoadResultBean(new ArrayList(result.getContent()), (int) result.getTotalElements(), config.getOffset());

@Override
    public PagingLoadResult<Map<String, String>> fetchTableOrViewData(PagingLoadConfig config, String tableOrViewName) {
        int limit = 50;
        int page = 0;
        int offset = 0;
        if (config != null) {
            page = (config.getLimit() != 0 && config.getOffset() > 0) ? (config.getOffset() / config.getLimit()) : 0;
            limit = config.getLimit();
            offset = config.getOffset();
        }

        Pageable pageable = new PageRequest(page, limit); //TODO sort + page size + тут мощный сb 
        Page<HashMap<String, String>> result = tableService.findAll(tableOrViewName, pageable);
        ArrayList<HashMap<String,String>> res = new ArrayList<>( result.getContent());
        return new PagingLoadResultBean(res, (int) result.getTotalElements(), offset);
    }

        ListStore<M> store = new ListStore<M>(new ModelKeyProvider<M>() {
            @Override
            public String getKey(M item) {
                GWT.log(item.toString());
                String id = null;
                if (item != null) {
                    // {rolename=ROLE_USER, id=2}
                    String[] arr = item.toString().replaceAll("\\{", "").replaceAll("\\}", "").split(",");
                    for (String string : arr) {
                        String[] sarr = string.split("=");
                        if (sarr[0].replaceAll(" ", "").equals("id")) {
                            id = sarr[1];
                            break;
                        }
                    }
                }
//                if (item instanceof <YourCustomerClass>) {
//                    return ((YourCustomerClass) item).getId();
//                }
                GWT.log(id);
                return id;
            }
        });