src/javax/persistence/criteria/From.java

/*******************************************************************************
 * Copyright (c) 1998, 2009 Oracle. All rights reserved. 
 * 
 * This program and the accompanying materials are made available under the 
 * terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0 
 * which accompanies this distribution. 
 * The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
 * and the Eclipse Distribution License is available at 
 * http://www.eclipse.org/org/documents/edl-v10.php.
 * 
 * Contributors:
 *     dclarke - Java Persistence 2.0 - Proposed Final Draft (March 13, 2009)
 *               Specification available from http://jcp.org/en/jsr/detail?id=317
 *     gyorke  - Post PFD updates
 *
 * Java(TM) Persistence API, Version 2.0 - EARLY ACCESS
 * This is an implementation of an early-draft specification developed under the 
 * Java Community Process (JCP).  The code is untested and presumed not to be a  
 * compatible implementation of JSR 317: Java(TM) Persistence API, Version 2.0.   
 * We encourage you to migrate to an implementation of the Java(TM) Persistence 
 * API, Version 2.0 Specification that has been tested and verified to be compatible 
 * as soon as such an implementation is available, and we encourage you to retain 
 * this notice in any implementation of Java(TM) Persistence API, Version 2.0 
 * Specification that you distribute.
 ******************************************************************************/
package javax.persistence.criteria;

import javax.persistence.metamodel.SingularAttribute;
import javax.persistence.metamodel.CollectionAttribute;
import javax.persistence.metamodel.ListAttribute;
import javax.persistence.metamodel.MapAttribute;
import javax.persistence.metamodel.SetAttribute;

/**
 * Represents a bound type, usually an entity that appears in the from clause,
 * but may also be an embeddable belonging to an entity in the from clause.
 * Serves as a factory for Joins of associations, embeddables and collections
 * belonging to the type, and for Paths of attributes belonging to the type.
 * 
 * @param <Z>
 * @param <X>
 * 
 * @since Java Persistence 2.0
 */
public interface From<Z, X> extends Path<X>, FetchParent<Z, X> {
    /**
     * Return the joins that have been made from this type.
     * 
     * @return joins made from this type
     */
    java.util.Set<Join<X, ?>> getJoins();

    /**
     *  Join to the specified single-valued attribute using an 
     *  inner join.
     *  
     * @param attribute
     *            target of the join
     * @return the resulting join
     */
    <Y> Join<X, Y> join(SingularAttribute<? super X, Y> attribute);

    /**
     *  Join to the specified single-valued attribute using the 
     *  given join type.
     * 
     * @param attribute
     *            target of the join
     * @param jt
     *            join type
     * @return the resulting join
     */
    <Y> Join<X, Y> join(SingularAttribute<? super X, Y> attribute, JoinType jt);

    /**
     * Join to the specified Collection-valued attribute using an inner join.
     * 
     * @param collection
     *            target of the join
     * @return the resulting join
     */
    <Y> CollectionJoin<X, Y> join(CollectionAttribute<? super X, Y> collection);

    /**
     * Join to the specified Set-valued attribute using an inner join.
     * 
     * @param set
     *            target of the join
     * @return the resulting join
     */
    <Y> SetJoin<X, Y> join(SetAttribute<? super X, Y> set);

    /**
     * Join to the specified List-valued attribute using an inner join.
     * 
     * @param list
     *            target of the join
     * @return the resulting join
     */
    <Y> ListJoin<X, Y> join(ListAttribute<? super X, Y> list);

    /**
     * Join to the specified Map-valued attribute using an inner join.
     * 
     * @param map
     *            target of the join
     * @return the resulting join
     */
    <K, V> MapJoin<X, K, V> join(MapAttribute<? super X, K, V> map);

    /**
     * Join to the specified Collection-valued attribute using the given join
     * type.
     * 
     * @param collection
     *            target of the join
     * @param jt
     *            join type
     * @return the resulting join
     */
    <Y> CollectionJoin<X, Y> join(CollectionAttribute<? super X, Y> collection, JoinType jt);

    /**
     * Join to the specified Set-valued attribute using the given join type.
     * 
     * @param set
     *            target of the join
     * @param jt
     *            join type
     * @return the resulting join
     */
    <Y> SetJoin<X, Y> join(SetAttribute<? super X, Y> set, JoinType jt);

    /**
     * Join to the specified List-valued attribute using the given join type.
     * 
     * @param list
     *            target of the join
     * @param jt
     *            join type
     * @return the resulting join
     */
    <Y> ListJoin<X, Y> join(ListAttribute<? super X, Y> list, JoinType jt);

    /**
     * Join to the specified Map-valued attribute using the given join type.
     * 
     * @param map
     *            target of the join
     * @param jt
     *            join type
     * @return the resulting join
     */
    <K, V> MapJoin<X, K, V> join(MapAttribute<? super X, K, V> map, JoinType jt);

    // String-based:
    /**
     * Join to the specified attribute using an inner join.
     * 
     * @param attributeName
     *            name of the attribute for the target of the join
     * @return the resulting join
     */
    <X, Y> Join<X, Y> join(String attributeName);

    /**
     * Join to the specified Collection-valued attribute using an inner join.
     * 
     * @param attributeName
     *            name of the attribute for the target of the join
     * @return the resulting join
     */
    <X, Y> CollectionJoin<X, Y> joinCollection(String attributeName);

    /**
     * Join to the specified Set-valued attribute using an inner join.
     * 
     * @param attributeName
     *            name of the attribute for the target of the join
     * @return the resulting join
     */
    <X, Y> SetJoin<X, Y> joinSet(String attributeName);

    /**
     * Join to the specified List-valued attribute using an inner join.
     * 
     * @param attributeName
     *            name of the attribute for the target of the join
     * @return the resulting join
     */
    <X, Y> ListJoin<X, Y> joinList(String attributeName);

    /**
     * Join to the specified Map-valued attribute using an inner join.
     * 
     * @param attributeName
     *            name of the attribute for the target of the join
     * @return the resulting join
     */
    <X, K, V> MapJoin<X, K, V> joinMap(String attributeName);

    /**
     * Join to the specified attribute using the given join type.
     * 
     * @param attributeName
     *            name of the attribute for the target of the join
     * @param jt
     *            join type
     * @return the resulting join
     */
    <X, Y> Join<X, Y> join(String attributeName, JoinType jt);

    /**
     * Join to the specified Collection-valued attribute using the given join
     * type.
     * 
     * @param attributeName
     *            name of the attribute for the target of the join
     * @param jt
     *            join type
     * @return the resulting join
     */
    <X, Y> CollectionJoin<X, Y> joinCollection(String attributeName, JoinType jt);

    /**
     * Join to the specified Set-valued attribute using the given join type.
     * 
     * @param attributeName
     *            name of the attribute for the target of the join
     * @param jt
     *            join type
     * @return the resulting join
     */
    <X, Y> SetJoin<X, Y> joinSet(String attributeName, JoinType jt);

    /**
     * Join to the specified List-valued attribute using the given join type.
     * 
     * @param attributeName
     *            name of the attribute for the target of the join
     * @param jt
     *            join type
     * @return the resulting join
     */
    <X, Y> ListJoin<X, Y> joinList(String attributeName, JoinType jt);

    /**
     * Join to the specified Map-valued attribute using the given join type.
     * 
     * @param attributeName
     *            name of the attribute for the target of the join
     * @param jt
     *            join type
     * @return the resulting join
     */
    <X, K, V> MapJoin<X, K, V> joinMap(String attributeName, JoinType jt);
}