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eFaps is a framework used to map objects with or without attached files to a relational database and optional file systems (only for attaches files). Configurable access control can be provided down to object and attribute level depending on implementation and use case. Depending on requirements, events (like triggers) allow to implement business logic and to separate business logic from user interface. The framework includes integrations (e.g. webdav, full text search) and a web application as 'simple' configurable user interface. Some best practises, example web application modules (e.g. team work module) support administrators and implementers using this framework.

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/*
 * Copyright 2003 - 2012 The eFaps 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.
 *
 * Revision:        $Rev: 7483 $
 * Last Changed:    $Date: 2012-05-11 11:57:38 -0500 (Fri, 11 May 2012) $
 * Last Changed By: $Author: [email protected] $
 */


package org.efaps.db.search;

import org.efaps.db.AbstractObjectQuery;
import org.efaps.db.wrapper.SQLSelect;
import org.efaps.util.EFapsException;

/**
 * Part of a statement.
 *
 * @author The eFaps Team
 * @version $Id: AbstractQPart.java 7483 2012-05-11 16:57:38Z [email protected] $
 */
public abstract class AbstractQPart
{

    /**
     * Method adds the sql statement parts to the given StringBuilder.
     *
     * @param _sql StringBuilder to append to
     * @return this AbstractPart
     * @throws EFapsException on any error
     */
    public abstract AbstractQPart appendSQL(final SQLSelect _sql)
        throws EFapsException;

    /**
     * Method is executed to prepare the different parts for execution
     * of the sql statement.
     * @param _query    query the part belong to
     * @param _part     Part this part is nested in
     * @return this AbstractPart
     * @throws EFapsException on any error
     */
    public abstract AbstractQPart prepare(final AbstractObjectQuery _query,
                                          final AbstractQPart _part)
        throws EFapsException;
}