componentpropertyholder.java

hibernate3.2.6源码和jar包

//$Id: ComponentPropertyHolder.java 14390 2008-03-04 22:42:53Z epbernard $
package org.hibernate.cfg;

import javax.persistence.Column;
import javax.persistence.JoinColumn;
import javax.persistence.JoinTable;

import org.hibernate.AnnotationException;
import org.hibernate.mapping.Component;
import org.hibernate.mapping.Join;
import org.hibernate.mapping.KeyValue;
import org.hibernate.mapping.PersistentClass;
import org.hibernate.mapping.Property;
import org.hibernate.mapping.Table;

/**
 * Component implementation of property holder
 *
 * @author Emmanuel Bernard
 */
public class ComponentPropertyHolder extends AbstractPropertyHolder {
	//TODO introduce a overrideTable() method for columns held by sec table rather than the hack
	//     joinsPerRealTableName in ClassPropertyHolder
	private Component component;

	public String getEntityName() {
		return component.getComponentClassName();
	}

	public void addProperty(Property prop, Ejb3Column[] columns) {
		//Ejb3Column.checkPropertyConsistency( ); //already called earlier
		/*
		 * Check table matches between the component and the columns
		 * if not, change the component table if no properties are set
		 * if a property is set already the core cannot support that
		 */
		Table table = columns[0].getTable();
		if ( !table.equals( component.getTable() ) ) {
			if ( component.getPropertySpan() == 0 ) {
				component.setTable( table );
			}
			else {
				throw new AnnotationException(
						"A component cannot hold properties split into 2 different tables: "
								+ this.getPath()
				);
			}
		}
		addProperty( prop );
	}

	public Join addJoin(JoinTable joinTableAnn, boolean noDelayInPkColumnCreation) {
		return parent.addJoin( joinTableAnn, noDelayInPkColumnCreation );

	}

	public ComponentPropertyHolder(
			Component component, String path, PropertyData inferredData, PropertyHolder parent,
			ExtendedMappings mappings
	) {
		super( path, parent, inferredData.getPropertyClass(), mappings );
		setCurrentProperty( inferredData.getProperty() );
		this.component = component;
	}

	public String getClassName() {
		return component.getComponentClassName();
	}

	public String getEntityOwnerClassName() {
		return component.getOwner().getClassName();
	}

	public Table getTable() {
		return component.getTable();
	}

	public void addProperty(Property prop) {
		component.addProperty( prop );
	}

	public KeyValue getIdentifier() {
		return component.getOwner().getIdentifier();
	}

	public PersistentClass getPersistentClass() {
		return component.getOwner();
	}

	public boolean isComponent() {
		return true;
	}

	public boolean isEntity() {
		return false;
	}

	public void setParentProperty(String parentProperty) {
		component.setParentProperty( parentProperty );
	}

	@Override
	public Column[] getOverriddenColumn(String propertyName) {
		//FIXME this is yukky
		Column[] result = super.getOverriddenColumn( propertyName );
		if ( result == null ) {
			String userPropertyName = extractUserPropertyName( "id", propertyName );
			if ( userPropertyName != null ) result = super.getOverriddenColumn( userPropertyName );
		}
		if ( result == null ) {
			String userPropertyName = extractUserPropertyName( "_identifierMapper", propertyName );
			if ( userPropertyName != null ) result = super.getOverriddenColumn( userPropertyName );
		}
		return result;
	}

	private String extractUserPropertyName(String redundantString, String propertyName) {
		String result = null;
		String className = component.getOwner().getClassName();
		if ( propertyName.startsWith( className )
				&& propertyName.length() > className.length() + 2 + redundantString.length() // .id.
				&& propertyName.substring(
				className.length() + 1, className.length() + 1 + redundantString.length()
		).equals( redundantString )
				) {
			//remove id we might be in a @IdCLass case
			result = className + propertyName.substring( className.length() + 1 + redundantString.length() );
		}
		return result;
	}

	@Override
	public JoinColumn[] getOverriddenJoinColumn(String propertyName) {
		return super.getOverriddenJoinColumn( propertyName );
	}
}