joinable.java

用Java实现的23个常用设计模式源代码

//$Id: Joinable.java,v 1.1.2.5 2003/09/08 11:32:26 oneovthafew Exp $
package net.sf.hibernate.persister;

/**
 * Anything that can be loaded by outer join - namely
 * persisters for classes or collections.
 * 
 * @author Gavin King
 */
public interface Joinable /*extends PropertyMapping*/ {
	/**
	 * An identifiying name; a class name or collection role name.
	 */
	public String getName();
	/**
	 * The table to join to.
	 */
	public String getTableName();
	/**
	 * All columns to select, when joining.
	 */
	public String joinSelectFragment(String alias, String suffix);
	/**
	 * Get the where clause part of any joins
	 * (optional operation)
	 */
	public String whereJoinFragment(String alias, boolean innerJoin, boolean includeSubclasses);
	/**
	 * Get the from clause part of any joins
	 * (optional operation)
	 */
	public String fromJoinFragment(String alias, boolean innerJoin, boolean includeSubclasses);
	/**
	 * The columns to join on.
	 */
	public String[] getJoinKeyColumnNames();
	/**
	 * Is this instance actually a CollectionPersister?
	 */
	public boolean isCollection();
	/**
	 * Is this instance actually a many-to-many association?
	 */
	public boolean isManyToMany();
	/**
	 * Ugly, very ugly....
	 */
	public boolean consumesAlias();
}