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  • java.lang.ClassCastException: java.lang.Long cannot be cast to java.lang.Integer

    I am pulling my hair out already.

    I want to use existing hibernate beans, because I want to expand POJOS with business logic for my domain. I prefer to stick to hibernate rather than SQL servertype.

    I have gotten stuck with the long <-> integer hibernate issue. I set all datatypes to be explicitly long, but I still get the error. Where is the integer?

    Here is a very simple example that I try to get running, to no avail:

    Entry.gwt.xml
    Code:
    <!DOCTYPE module PUBLIC "-//Google Inc.//DTD Google Web Toolkit 1.6//EN"
            "http://google-web-toolkit.googlecode.com/svn/releases/1.6/distro-source/core/src/gwt-module.dtd">
    <module rename-to="reg">
    
        <inherits name='com.google.gwt.user.User'/>
        <inherits name='com.smartgwtee.SmartGwtEE'/>
        <inherits name="com.smartgwtee.tools.Tools"/>
        <entry-point class='bg.enf.reg.client.Entry'/>
    </module>
    Entry.java
    Code:
    package bg.enf.reg.client;
    
    import com.google.gwt.core.client.EntryPoint;
    import com.smartgwt.client.data.DataSource;
    import com.smartgwt.client.widgets.grid.ListGrid;
    import com.smartgwt.client.widgets.grid.ListGridField;
    import com.smartgwt.client.widgets.layout.VLayout;
    
    public class Entry implements EntryPoint {
        public void onModuleLoad() {
            DataSource dataSource = DataSource.get("Person__Grid");
    
            //the order items list grid
            final ListGrid orderItemsList = new ListGrid();
    
            //the order list grid
            ListGrid ordersList = new ListGrid();
            ordersList.setHeight(170);
            ordersList.setWidth(500);
            ordersList.setDataSource(dataSource);
            ordersList.setAutoFetchData(true);
    
            ListGridField fldName = new ListGridField("name");
            fldName.setWidth("100%");
    
            ordersList.setFields(fldName);
    
            VLayout layout = new VLayout(5);
            layout.setWidth(500);
            layout.addMember(ordersList);
            layout.draw();
        }
    }
    person schema
    Code:
    DROP TABLE IF EXISTS `enfserver`.`person`;
    CREATE TABLE  `enfserver`.`person` (
      `personid` int(10) unsigned NOT NULL AUTO_INCREMENT,
      `name` varchar(255) NOT NULL,
      PRIMARY KEY (`personid`)
    ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
    Hibernate xml - Person.hbm.xml
    Code:
    <?xml version="1.0"?>
    <!DOCTYPE hibernate-mapping PUBLIC
      "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
      "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
    <hibernate-mapping>
    
        <class name="bg.enf.reg.domain.Person" table="person" catalog="enfserver">
            <id name="personid" type="java.lang.Long">
                <generator class="native"/>
            </id>
            <property name="name" type="string"/>
        </class>
    </hibernate-mapping>
    Person.java
    Code:
    package bg.enf.reg.domain;
    
    import java.io.Serializable;
    
    public class Person implements Serializable {
        protected Long personid;
    
        public Long getPersonid() {
            return personid;
        }
    
        public void setPersonid(Long personid) {
            this.personid = personid;
        }
    
        protected String name;
    
        public String getName() {
            return name;
        }
    
        public void setName(String name) {
            this.name = name;
        }
    }
    DataSource Definition - Person__Grid.ds.xml
    Code:
    <DataSource ID="Person__Grid" serverType="hibernate" tablename="person" beanClassName="bg.enf.reg.domain.Person">
        <fields>
            <field name="personid" type="sequence" primaryKey="true" hidden="true" />
            <field name="name" type="text" title="Name"/>
        </fields>
    </DataSource>
    Execution log & exception stack trace
    Code:
    === 2010-03-14 16:09:56,234 [80-1] DEBUG RPCManager - Processing 1 requests.
    === 2010-03-14 16:09:56,250 [80-1] DEBUG RPCManager - Request #1 (DSRequest) payload: {
        criteria:{
        },
        operationConfig:{
            dataSource:"Person__Grid",
            operationType:"fetch",
            textMatchStyle:"substring"
        },
        startRow:0,
        endRow:75,
        componentId:"isc_OID_1",
        appID:"builtinApplication",
        operation:"Person__Grid_fetch",
        oldValues:{
        }
    }
    === 2010-03-14 16:09:56,250 [80-1] INFO  IDACall - Performing 1 operation(s)
    === 2010-03-14 16:09:56,265 [80-1] DEBUG AppBase - [builtinApplication.Person__Grid_fetch] No userTypes defined, allowing anyone access to all operations for this application
    === 2010-03-14 16:09:56,265 [80-1] DEBUG AppBase - [builtinApplication.Person__Grid_fetch] No public zero-argument method named '_Person__Grid_fetch' found, performing generic datasource operation
    === 2010-03-14 16:09:56,265 [80-1] INFO  HibernateDataSource - [builtinApplication.Person__Grid_fetch] Performing fetch operation with
    	criteria: {}	values: {}
    Hibernate: 
        select
            count(*) as y0_ 
        from
            enfserver.person this_
    Hibernate: 
        select
            count(*) as y0_ 
        from
            enfserver.person this_
    === 2010-03-14 16:09:56,390 [80-1] WARN  RequestContext - dsRequest.execute() failed: 
    java.lang.ClassCastException: java.lang.Long cannot be cast to java.lang.Integer
    	at com.isomorphic.hibernate.HibernateDataSource.buildCriteria(HibernateDataSource.java:823)
    	at com.isomorphic.hibernate.HibernateDataSource.execute(HibernateDataSource.java:515)
    	at com.isomorphic.application.AppBase.executeDefaultDSOperation(AppBase.java:721)
    	at com.isomorphic.application.AppBase.executeAppOperation(AppBase.java:658)
    	at com.isomorphic.application.AppBase.execute(AppBase.java:491)
    	at com.isomorphic.datasource.DSRequest.execute(DSRequest.java:1250)
    	at com.isomorphic.servlet.IDACall.handleDSRequest(IDACall.java:155)
    	at com.isomorphic.servlet.IDACall.processRequest(IDACall.java:106)
    	at com.isomorphic.servlet.IDACall.doPost(IDACall.java:54)
    	at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
    	at com.isomorphic.servlet.BaseServlet.service(BaseServlet.java:152)
    	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
    	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
    	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
    	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
    	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
    	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
    	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
    	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:852)
    	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
    	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
    	at java.lang.Thread.run(Thread.java:619)
    === 2010-03-14 16:09:56,390 [80-1] DEBUG RPCManager - Content type for RPC transaction: text/plain; charset=UTF-8
    === 2010-03-14 16:09:56,390 [80-1] DEBUG RPCManager - non-DMI response, dropExtraFields: false
    Last edited by vmihaylov; 14th Mar 2010, 09:28.

  • #2
    I used the all libraries provided with the smartgwt distribution, along with a separate gwt and mysql connector libraries.
    This resolved the error. Hopefully haven't wasted resources on your part :)

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