package com.acm.report.model;

import java.util.Collection;
import java.util.List;

public class Report {

    private static List slaname;
    private String contractNumber;
    private static String[] arrayCheck;


    public static List getSlaname() {
        return slaname;
    }

    public void setSlaname(List<String> slaname) {
        this.slaname = slaname;
    }

    public String getContractNumber() {
        return contractNumber;
    }

    public void setContractNumber(String contractNumber) {
        this.contractNumber = contractNumber;
    }

    public static String[] getArrayCheck() {
        return arrayCheck;
    }

    public void setArrayCheck(String[] arrayCheck) {
        this.arrayCheck = arrayCheck;
    }
    public static Collection getCollection(){
        return slaname;
    }
}

net.sf.jasperreports.engine.JRException: Factory method must return Collection<?> or Object[] not: com.acm.report.model.Report
    at net.sf.jasperreports.data.bean.BeanDataAdapterService.contributeParameters(BeanDataAdapterService.java:93)
    at net.sf.jasperreports.data.AbstractDataAdapterService.test(AbstractDataAdapterService.java:129)
    at com.jaspersoft.studio.data.wizard.AbstractDataAdapterWizard$3.run(AbstractDataAdapterWizard.java:165)
    at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:121)