dev 契约锁

P15GEN2\59518

2024-05-29 d4210c7c4b04abde20037ea8aa0f54ef8a2649aa

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package foundation.data.rule;
 
import foundation.data.entity.Entity;
import foundation.data.object.IParamProvider;
import foundation.token.IUser;
import foundation.token.IUserManager;
import foundation.variant.expression.VariantExpression;
import foundation.variant.expression.VariantList;
import foundation.variant.expression.VariantSegment;
import foundation.variant.provider.DataEvent;
import foundation.variant.provider.VariantCenter;
 
public class VariantDefaultValueCreator extends FieldDefaultValueCreator {
 
    public VariantDefaultValueCreator() {
        type = FieldDefaultValueType.Variant;
    }
    
    @Override
    protected void setRule(String rule) {
        try {
            VariantExpression expression = new VariantExpression(rule);
            VariantList varinats = expression.getVariantList();
            
            if (varinats.isEmpty()) {
                return;
            }
            
            VariantSegment variant = varinats.get(0);
            String name = variant.getName();
            super.setRule(name);
        } 
        catch (Exception e) {
            e.printStackTrace();
        }
    }
 
    @Override
    public Object exec(DataEvent dataEvent, Entity entity, IParamProvider paramProvider) {
        IUser user = IUserManager.getCurrentUser();
        Object value = VariantCenter.getValue(dataEvent, rule, user);
        
        if (value != null) {
            entity.set(fieldName, value);
        }
        
        return value;
    }
    
}