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Panda Core is the core module of Panda Framework, it contains commonly used utility classes similar to apache-commons.

There is a newer version: 1.8.0

package panda.dao.entity.annotation;

import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

/**
 * A JOIN mapping:
 *  *   select * from [this] 
 *     [LEFT OUTER] JOIN [target] ON [keys] = [refs]  
 * 
 */
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.TYPE)
@Documented
public @interface Join {

	/**
	 * join name
	 */
	String name();

	/**
	 * join type: default is 'LEFT OUTER'
	 */
	String type() default "";

	/**
	 * target class
	 */
	Class target();

	/**
	 * query key fields of this entity
	 */
	String[] keys();

	/**
	 * the related keys of the target class.
	 */
	String[] refs();

}