StoreClause.java

/*
 * Copyright 2015, The Querydsl Team (http://www.querydsl.com/team)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.querydsl.core.dml;

import javax.annotation.Nullable;

import com.querydsl.core.types.Expression;
import com.querydsl.core.types.Path;

/**
 * Parent interface for {@link InsertClause} and {@link UpdateClause}
 *
 * @author tiwe
 *
 * @param <C> concrete subtype
 */
public interface StoreClause<C extends StoreClause<C>> extends DMLClause<C> {

    /**
     * Add a value binding
     *
     * @param <T>
     * @param path path to be updated
     * @param value value to set
     * @return the current object
     */
    <T> C set(Path<T> path, @Nullable T value);

    /**
     * Add an expression binding
     *
     * @param <T>
     * @param path path to be updated
     * @param expression binding
     * @return the current object
     */
    <T> C set(Path<T> path, Expression<? extends T> expression);

    /**
     * Bind the given path to null
     *
     * @param path path to be updated
     * @return the current object
     */
    <T> C setNull(Path<T> path);

    /**
     * Returns true, if no bindings have been set, otherwise false.
     *
     * @return true, if empty, false, if not
     */
    boolean isEmpty();


}