Bug 142432 MasterPage from library can't be restored to modify
Details: MasterPage from library can't be restored to modify Step: 1.New a library named lib1, and insert a masterpage named lib-mp. 2.Publish the library into resource folder. 3.New a report design and use lib1. 4.Drop the lib-mp from library explorer into outline of report design. 5.Double click lib-mp, and switch to Property editro tab. 6.Click restore. Actual result: Pop up an error message and said that the master page cannot specify size the page type is not custom.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/DesignElementHandle.java
import org.eclipse.birt.report.model.elements.TemplateElement;
import org.eclipse.birt.report.model.elements.interfaces.IDesignElementModel;
import org.eclipse.birt.report.model.metadata.ElementDefn;
import org.eclipse.birt.report.model.metadata.ElementPropertyDefn;
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.ReferenceValue;
import org.eclipse.birt.report.model.metadata.StructRefValue;
import org.eclipse.birt.report.model.util.ReferenceValueUtil;
/**
 * Base class for all report elements. Provides a high-level interface to the
 * BIRT report model. This class provides generic services for all elements.
 * Derived classes provide specialized methods for each element type.
 * <p>
 * Element handles are immutable. Once created, they always point to the same
 * element. Handles also cannot point to a null element. An assertion will be
 * raised if the derived classes are created with a null element.
 * <p>
 * For a complete description of the services available for any design element,
 * see the class description for the
 * {@link org.eclipse.birt.report.model.core.DesignElement}class.
 * 
 * @see SlotHandle
 * @see org.eclipse.birt.report.model.core.DesignElement
 */
public abstract class DesignElementHandle implements IDesignElementModel
{
	/**