Bug 149251 Inconsistent Handling of a Non-inheritable ROM Property
For a ROM property defined to be non-inheritable, an empty string property value should be consistently handled as an empty string, not as null. For example, an oda.dataSource extension defines a data source property with canInherit=false. When a oda-data-source handle get saved in a report design, it correctly includes the tag for such property, even when an empty string value is specified. <oda-data-source extensionID="my.oda.plugin" name="my Data Source" id="24"> ... <property name="ApplicationServer"></property> </oda-data-source> However, later when using the DE API to read its property value, a null is returned. Then when the report design is subsequently saved, the property tag is lost. Expects that an empty string value of a non-inhertiable property should be preserved.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/core/DesignElement.java
import org.eclipse.birt.report.model.metadata.ElementRefValue;
import org.eclipse.birt.report.model.metadata.MetaDataDictionary;
import org.eclipse.birt.report.model.metadata.PropertyDefn;
import org.eclipse.birt.report.model.metadata.PropertyType;
import org.eclipse.birt.report.model.metadata.SlotDefn;
import org.eclipse.birt.report.model.metadata.StructRefPropertyType;
import org.eclipse.birt.report.model.metadata.StructRefValue;
import org.eclipse.birt.report.model.util.ContentIterator;
import org.eclipse.birt.report.model.util.ElementStructureUtil;
import org.eclipse.birt.report.model.util.ModelUtil;
import org.eclipse.birt.report.model.util.ReferenceValueUtil;
import org.eclipse.birt.report.model.validators.ValidationExecutor;
/**
 * Base class for all design elements in BIRT. This class provides a number of
 * basic services:
 * <p>
 * <ul>
 * <li>Meta-data</li>
 * <li>Styles</li>
 * <li>Inheritance</li>
 * <li>Property management</li>
 * <li>Element name</li>
 * <li>Containment</li>
 * <li>Change notification</li>
 * <li>Visitor</li>
 * <li>API handle</li>
 * <li>Semantic state</li>
 * </ul>
 * <p>
 * The descriptions that follow describe the major operations on this class. All