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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 - 2011 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: 6210 $
 * Last Changed:    $Date: 2011-02-18 16:02:56 -0500 (Fri, 18 Feb 2011) $
 * Last Changed By: $Author: [email protected] $
 */

package org.efaps.db.query;

/**
 * The class is used to build a complete statement with correct order etc.
 * The class is working like a string buffer.
 *
 * @author The eFaps Team
 * @version $Id: CompleteStatement.java 6210 2011-02-18 21:02:56Z [email protected] $
 */
@Deprecated
public class CompleteStatement
{
    /**
     * StringBuilder used for this statement.
     */
    private final StringBuilder statement = new StringBuilder();

    /**
     * The instance variable stores if a where clause must be appended.
     *
     * @see #hasWhere
     */
    private boolean where = false;


    /**
     * The instance variable stores if a from clause must be appended.
     *
     * @see #hasWhere
     */
    private boolean from = false;

    /**
     * Is the current part an expression.
     */
    private boolean expr = false;

    /**
     * Append an union to this statement.
     */
    public void appendUnion()
    {
        append(" union ");
        this.expr = false;
        this.where = false;
        this.from = false;
    }

    /**
     * Append an and to this statement.
     * @return this
     */
    public CompleteStatement appendWhereAnd()
    {
        if (this.where && this.expr)  {
            append(" and ");
            this.expr = false;
        }
        return this;
    }

    /**
     * Append an or to this statement.
     */
    public void appendWhereOr()
    {
        if (this.where && this.expr)  {
            append(" or ");
            this.expr = false;
        }
    }

    /**
     * Append an where to this statement.
     * @return this
     */
    public CompleteStatement appendWhere()
    {
        if (!this.where)  {
            append(" where ");
            this.where = true;
        }
        this.expr = false;
        return this;
    }


    /**
     * Append an where to this statement.
     * @param _where where
     * @return this
     */
    public CompleteStatement appendWhere(final Object _where)
    {
        if (!this.where)  {
            append(" where ");
            this.where = true;
        }
        append(_where);
        this.expr = true;
        return this;
    }

    /**
     * Append an from to this statement.
     * @param _from from
     * @return this
     */
    public CompleteStatement appendFrom(final String _from)
    {
        if (!this.from)  {
            append(" from ");
            this.from = true;
        } else  {
            append(",");
        }
        append(_from);
        return this;
    }

    /**
     * Append an text to this statement.
     * @param _text text
     * @return this
     */
    public CompleteStatement append(final Object _text)
    {
        getStatement().append(_text);
        return this;
    }

    /**
     * This is the getter method for instance variable
     * {@link #selectStatement}.
     *
     * @return value of instance variable {@link #selectStatement}
     * @see #selectStatement
     */
    public StringBuilder getStatement()
    {
        return this.statement;
    }

    /**
     * Getter method for the instance variable {@link #where}.
     *
     * @return value of instance variable {@link #where}
     */
    public boolean isWhere()
    {
        return this.where;
    }

    /**
     * Return this statement.
     * @return this
     */
    @Override()
    public String toString()
    {
        return this.statement.toString();
    }
}