在EORow或者VORow中对数据进行重复性校验

需求：在设置付款条件时不允许账期+付款方式重复。

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由于本次需求仅需要对VO缓存中的数据进行重复性校验，所以仅需进行缓存遍历即可，不需要校验数据库。

方式1，在EORow的进行数据校验。

    public void setPaymentTermsId(Number value) {
        if(value!=null && !"".equals(value) && this.getPaymentMethod()!=null && !"".equals(getPaymentMethod()) ){
            validateRepeat(value, getPaymentMethod(), "TERMS");
        }
        setAttributeInternal(PAYMENTTERMSID, value);
    }

    public void setPaymentMethod(String value) {
        if(value!=null && !"".equals(value) && this.getPaymentTermsId()!=null && !"".equals(getPaymentTermsId()) ){
            validateRepeat(getPaymentTermsId(), value, "METHOD");
        }
        setAttributeInternal(PAYMENTMETHOD, value);
    }

    public void validateRepeat(Number payTerms,String payMethod,String cloumn){
        com.sun.java.util.collections.Iterator payIterator =
            getEntityDef().getAllEntityInstancesIterator(getDBTransaction());
        String currentStr =  payTerms+"-"+payMethod;

        while(payIterator.hasNext()){
            CuxPoPayProvisionTempEOImpl cachePay = (CuxPoPayProvisionTempEOImpl)payIterator.next();
            String validationStr = cachePay.getPaymentTermsId()+"-"+cachePay.getPaymentMethod();
            if(currentStr.equals(validationStr)){
                if("TERMS".equals(cloumn)){
                    //发生重复异常时，设置选择值为空，避免选择后提示了异常，选择值仍然放置到了Poplist中
                    setPaymentTermsId(null);
                }
                if("METHOD".equals(cloumn)){
                    //发生重复异常时，设置选择值为空，避免选择后提示了异常，选择值仍然放置到了Poplist中
                    setPaymentMethod(null);
                }

                throw
                    new OAAttrValException(OAException.TYP_ENTITY_OBJECT,
                                           getEntityDef().getFullName(),
                                           getPrimaryKey(),
                                           "PayProvisionTempId", currentStr,
                                           "CUX",
                                           "CUX_PO_PAY_PROVI_VALIDATION"); // Message name
            }

        }

    }

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2.在VORow中进行校验，

    public void setPaymentTermsId(Number value) {
        if(value!=null && !"".equals(value) && this.getPaymentMethod()!=null && !"".equals(getPaymentMethod()) ){
            validateRepeat(value, getPaymentMethod(), "TERMS");
        }
        setAttributeInternal(PAYMENTTERMSID, value);
    }

    public String getPaymentMethod() {
        return (String) getAttributeInternal(PAYMENTMETHOD);
    }

    public void validateRepeat(Number payTerms,String payMethod,String cloumn){
        CuxPoPayProvisionTempEOImpl tempEO =(CuxPoPayProvisionTempEOImpl)this.getEntity(0);
        com.sun.java.util.collections.Iterator payIterator = tempEO.getDefinitionObject().getAllEntityInstancesIterator(tempEO.getDBTransaction());            

        String currentStr =  payTerms+"-"+payMethod;

        while(payIterator.hasNext()){
            CuxPoPayProvisionTempEOImpl cachePay = (CuxPoPayProvisionTempEOImpl)payIterator.next();
            String validationStr = cachePay.getPaymentTermsId()+"-"+cachePay.getPaymentMethod();
            if(currentStr.equals(validationStr)){
                if("TERMS".equals(cloumn)){
                    setPaymentTermsId(null);
                }
                if("METHOD".equals(cloumn)){
                    setPaymentMethod(null);
                }

                throw
                    new OAAttrValException(OAException.TYP_VIEW_OBJECT,
                                           getViewObject().getFullName(),
                                           getKey(),
                                           "PayProvisionTempId", currentStr,
                                           "CUX",
                                           "CUX_PO_PAY_PROVI_VALIDATION"); // Message name
            }

        }
    }

在实际的使用中存在以下需求，不仅要对VO中未提交的缓存进行校验，同时要校验数据库中已存在的值。

方法1.使用标准的同时扫描EORow和TABLE的方式，如果存在结果集，则说明该值已存在。

参考：同时查询数据库和缓存中的数据

public boolean attachmentExistsInCacheOrDb( String entityName, String[] pkValues){
         boolean atchExists = false;
         if ( pkValues != null )
         {
           if ( pkValues.length > 5 )
             throw new OAException("FND", "ATTCH_TOO_MANY_PKVALUES");
           ViewObject vo = null;
           vo = this.findViewObject("CheckFndAttachedDocumentsVO");
           if ( vo == null ){
               vo = this.createViewObject("CheckFndAttachedDocumentsVO",
               "oracle.apps.fnd.server.FndAttachedDocumentsVO");
           }

           vo.addQueryMode(vo.QUERY_MODE_SCAN_DATABASE_TABLES |
                                vo.QUERY_MODE_SCAN_ENTITY_ROWS);
           ViewCriteria vc = vo.createViewCriteria();
           ViewCriteriaRow vcr = vc.createViewCriteriaRow();
           //设定标准查询参数，可以多个，参数与Attribute类型一定要一致
           vcr.setAttribute("EntityName", entityName);
           vcr.setAttribute("Pk1Value", pkValues[0]);
           vcr.setConjunction(ViewCriteriaRow.VCROW_CONJ_AND);
           vc.addElement(vcr);

           vc.setCriteriaMode(ViewCriteria.CRITERIA_MODE_QUERY |
                              ViewCriteria.CRITERIA_MODE_CACHE);
           vo.applyViewCriteria(vc);
           vo.clearCache();
           vo.reset();
           vo.setWhereClause(null);
           vo.setWhereClauseParams(null);
           vo.setMaxFetchSize(-1);
           vo.executeQuery();
           if(vo.hasNext()){
               atchExists = true;
            }
        }
        else {
            throw new OAException("FND", "ATTCH_PKVALUES_CANNOT_NULL");
            }
        return atchExists;
    }

方法二：在EO或者VO缓存中进行校验之后再调用查询方法查询数据库中是否已存在值

EORowImpl

    public void setItemCategoryId(Number value) {
        if (value != null) {
            //此部分与缓存中的行进行校验
            //具体实现参考前文

            OADBTransaction transaction = getOADBTransaction();
            CategoryEntityExpert expert = getCategoryEntityExpert(transaction);
            if (expert.categoryExists(posMappingId,orgId,orgType, value, orgDepartment))
              {
                  throw new OAAttrValException(OAException.TYP_ENTITY_OBJECT,
                                                 getEntityDef().getFullName(),
                                                 getPrimaryKey(),
                                                 "ItemCategoryId",
                                                 value,
                                                 "CUX",
                                                 "CUX_SUP_PERMIT_001"); // Message name
              }

        }

        setAttributeInternal(ITEMCATEGORYID, value);
    }

    public static CategoryEntityExpert getCategoryEntityExpert(OADBTransaction txn){
        return (CategoryEntityExpert)txn.getExpert(CuxSuppItemCateMappingEOImpl.getDefinitionObject());
    }

    public static CategoryEntityExpert getCategoryEntityExpert(OADBTransaction txn){
        return (CategoryEntityExpert)txn.getExpert(CuxSuppItemCateMappingEOImpl.getDefinitionObject());
    }

CategoryEntityExpert类

mport oracle.jbo.domain.Number;

import oracle.apps.fnd.common.VersionInfo;
import oracle.apps.fnd.framework.server.OAEntityExpert;

public class CategoryEntityExpert extends OAEntityExpert {

    public boolean categoryExists(Number posMappingId, Number orgId,
                                  String orgType, Number categoryId,
                                  String orgDepartment) {
        boolean exists = false;

        CategoryIdVVOImpl vvo =
            (CategoryIdVVOImpl)findValidationViewObject("CategoryIdVVO1");
        vvo.initQuery(posMappingId, orgId, orgType, categoryId, orgDepartment);

        if (vvo.hasNext()) {
            exists = true;
        }

        return exists;

    }

}

CategoryIdVVO1是在AM中实例化的ValidateVO,通常VVO就是用于验证的VO