Examples of org.apache.cayenne.map.DerivedDbAttribute

org.apache.cayenne.map.DerivedDbAttribute
A DerivedDbAttribute is a DbAttribute that resolves to an SQL expression based on a set of other attributes. DerivedDbAttribute's allow to build expressions like " count(id)", "sum(price)", etc.
Internally DerivedDbAttribute is defined as a specification string and a set of substitution DbAttribute parameters. Specification string is an SQL expression that contains placeholders (%@) for attribute parameters, for example:

sum(%@) + sum(%@)
@author Andrus Adamchik @deprecated since 3.0M2 (scheduled for removal in 3.0M3) this type of mapping is no longer supported.

        }
    }


    static class DerivedDbAttributeFactory extends ObjAttributeFactory {
        protected Object create(String name, Object namingContext) {
            return new DerivedDbAttribute(
                name,
                TypesMapping.NOT_DEFINED,
                (DbEntity) namingContext,
                DerivedDbAttribute.ATTRIBUTE_TOKEN);
        }

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    /**
     * @deprecated since 3.0M2 (scheduled for removal in 3.0M3)
     */
    static class DerivedDbAttributeFactory extends ObjAttributeFactory {
        protected Object create(String name, Object namingContext) {
            return new DerivedDbAttribute(
                name,
                TypesMapping.NOT_DEFINED,
                (DbEntity) namingContext,
                DerivedDbAttribute.ATTRIBUTE_TOKEN);
        }

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        if (attribute.getType() == TypesMapping.NOT_DEFINED) {
            validator.registerWarning("DbAttribute has no type.", path);
        }


        if (attribute instanceof DerivedDbAttribute) {
            DerivedDbAttribute derived = (DerivedDbAttribute) attribute;
            int paramCount = derived.getParams().size();


            String spec = derived.getExpressionSpec();
            int paramsExpected = 0;
            if (spec != null) {
                // count tokens
                int ind = -DerivedDbAttribute.ATTRIBUTE_TOKEN.length();
                while ((ind = spec.indexOf(DerivedDbAttribute.ATTRIBUTE_TOKEN, ind

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        if (attribute.getType() == TypesMapping.NOT_DEFINED) {
            validator.registerWarning("DbAttribute has no type.", path);
        }


        if (attribute instanceof DerivedDbAttribute) {
            DerivedDbAttribute derived = (DerivedDbAttribute) attribute;
            int paramCount = derived.getParams().size();


            String spec = derived.getExpressionSpec();
            int paramsExpected = 0;
            if (spec != null) {
                // count tokens
                int ind = -DerivedDbAttribute.ATTRIBUTE_TOKEN.length();
                while ((ind = spec.indexOf(DerivedDbAttribute.ATTRIBUTE_TOKEN, ind

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      default: return "";
    }
  }


  public Object getValueAt(int row, int column) {
    DerivedDbAttribute attr = (DerivedDbAttribute)getAttribute(row);


    if (attr == null) {
      return "";
    }

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        return "";
    }
  }
  
  public void setUpdatedValueAt(Object newVal, int row, int col) {
    DerivedDbAttribute attr = (DerivedDbAttribute)getAttribute(row);
    if (attr == null) {
      return;
    }


    AttributeEvent e = new AttributeEvent(eventSource, attr, entity);


    switch (col) {
      case DB_ATTRIBUTE_NAME :
        e.setOldName(attr.getName());
        setAttributeName((String) newVal, attr);
        fireTableCellUpdated(row, col);
        break;
      case DB_ATTRIBUTE_SPEC :
        setSpec((String) newVal, attr);

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        }
    }


    static class DerivedDbAttributeFactory extends ObjAttributeFactory {
        protected Object create(String name, Object namingContext) {
            return new DerivedDbAttribute(
                name,
                TypesMapping.NOT_DEFINED,
                (DbEntity) namingContext,
                DerivedDbAttribute.ATTRIBUTE_TOKEN);
        }

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org.apache.cayenne.modeler.editor.dbentity.DerivedDbAttributeTableModel

org.apache.cayenne.project.NamedObjectFactory$DerivedDbAttributeFactory

org.apache.cayenne.project.validator.DbAttributeValidator

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java.util.List

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