2 Replies Latest reply on Dec 10, 2010 1:20 PM by valatharv

Displaying value against Id for single entity.

valatharv Dec 10, 2010 11:00 AM

Hi,

Please advice if there is any trick on how I can display value/ name against Id from single table/ entity when xhtml page loads in point b(i), b(ii).

Overview :
a) I have single entity Computers with fields as compId, computerName, applicationServerId

@Entity
@Name("Computers")
@Table(name = "COMPUTERS")
public class Computers implements java.io.Serializable {

        private Long compId;
        private String computerName;
        private Long applicationServerId;

        @Column(name = "COMP_ID")
        public Long getCompId() {
                return this.compId;
        }

        public void setCompId(Long compId) {
                this.compId = compId;
        }

        @Id
        @Column(name = "COMPUTER_NAME", unique = true, nullable = false, length = 50)
        @NotNull
        @Length(max = 50)
        public String getComputerName() {
                return this.computerName;
        }

        public void setComputerName(String computerName) {
                this.computerName = computerName;
        }


        @Column(name = "APPLICATION_SERVER_ID")
        public Long getApplicationServerId() {
                return this.applicationServerId;
        }

        public void setApplicationServerId(Long applicationServerId) {
                this.applicationServerId = applicationServerId;
        }
}

b) Seam-gen generated nice home and view objects.

Here applicationServerId can be any compId.

i) In Computers.xhtml applicationServerId is mapped from
<s:decorate id="applicationServerId" template="layout/display.xhtml">
            <ui:define name="label">Application Server</ui:define>
           #{computersHome.instance.applicationServerId} // CAN THIS BE SOMEHOW MAPPED TO CORRESPONDING computerName
</s:decorate>

ii) In ComputersList.xhtml applicationServerId is displayed from wrkComputersList.resultList
<rich:dataTable id="computersList"
                var="computers"
              value="#{computersList.resultList}"
           rendered="#{not empty computersList.resultList}">

<h:column>
        <f:facet name="header">
<s:link styleClass="columnHeader"
                        value="Processing ServerId #{computersList.order=='applicationServerId asc' ? messages.down : ( computersList.order=='applicationServerId desc' ? messages.up : '' )}">
                     <f:param name="order" value="#{computersList.order=='applicationServerId asc' ? 'applicationServerId desc' : 'applicationServerId asc'}"/>
                </s:link>
        </f:facet>
                #{computers.applicationServerId} // CAN THIS BE SOMEHOW MAPPED TO CORRESPONDING computerName
</h:column>

1. Re: Displaying value against Id for single entity.

tausuahmed Dec 10, 2010 11:40 AM (in response to valatharv)

Hi,

There are several ways to implement, one example is call a method from xhtml passing computers.applicationServerId as a parameter and return string as a computerName.
ex: #{method(computers.applicationServerId)}.

Thanks,
Tauseef
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2. Re: Displaying value against Id for single entity.

valatharv Dec 10, 2010 1:20 PM (in response to valatharv)

Thanks for the reply...

I am able to get applicationServerId in home object but how to get it in bean class (looks like some small thing I am missing)

a) I created simple bean to pass applicationServerId, but it always says method not found/ error parsing as below, any idea what small thing I am missing.
XHTML: #{computersHome.instance.processingServerId}// THIS IS THE ID I NEED TO PASS

<h:outputText value="#{compUtilsBean.applicationServerName(#{computersHome.instance.processingServerId})}" >
"//Gives Error Parsing: #{compUtilsBean.applicationServerName(#{computersHome.instance.processingServerId})}"

<h:outputText value="#{compUtilsBean.applicationServerName(23)}"/> //If I try to hard code for testing it says
//Error Method #{compUtilsBean.applicationServerName('23')}": Method not found: com.session.CompUtilsBean

<h:outputText value="#{compUtilsBean.applicationServerName}"/ >// THIS works fine for 1st. method in bean method but no id passed.

@Name("compUtilsBean")
@Scope(ScopeType.SESSION)
public class CompUtilsBean {
     ...
     public String getApplicationServerName() {
          return "test1";
     }
     public String getApplicationServerName(Long compId) {
          return "test2";
     }
     public String getApplicationServerName(String compId) {
          return "test3";
     }
}

b) This works fine I am able to get ApplicationServerId by creating method in corresponding computerHome and using getInstance
ComputerHome.java
public String getApplicationServerName() {
     Computers comp = getInstance();
     log.info("ComputerHome.getApplicationServerName application_server_id : "+this.getInstance().getApplicationServerId());
     //Get computerName on the basis of this this.getInstance().getApplicationServerId() and return
     return "applicationServerName";
}
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