Quadcap Embeddable Database

com/quadcap/sql/FilterCursor.java

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package com.quadcap.sql;

/* Copyright 1999 - 2003 Quadcap Software.  All rights reserved.
 *
 * This software is distributed under the Quadcap Free Software License.
 * This software may be used or modified for any purpose, personal or
 * commercial.  Open Source redistributions are permitted.  Commercial
 * redistribution of larger works derived from, or works which bundle
 * this software requires a "Commercial Redistribution License"; see
 * http://www.quadcap.com/purchase.
 *
 * Redistributions qualify as "Open Source" under  one of the following terms:
 *   
 *    Redistributions are made at no charge beyond the reasonable cost of
 *    materials and delivery.
 *
 *    Redistributions are accompanied by a copy of the Source Code or by an
 *    irrevocable offer to provide a copy of the Source Code for up to three
 *    years at the cost of materials and delivery.  Such redistributions
 *    must allow further use, modification, and redistribution of the Source
 *    Code under substantially the same terms as this license.
 *
 * Redistributions of source code must retain the copyright notices as they
 * appear in each source code file, these license terms, and the
 * disclaimer/limitation of liability set forth as paragraph 6 below.
 *
 * Redistributions in binary form must reproduce this Copyright Notice,
 * these license terms, and the disclaimer/limitation of liability set
 * forth as paragraph 6 below, in the documentation and/or other materials
 * provided with the distribution.
 *
 * The Software is provided on an "AS IS" basis.  No warranty is
 * provided that the Software is free of defects, or fit for a
 * particular purpose.  
 *
 * Limitation of Liability. Quadcap Software shall not be liable
 * for any damages suffered by the Licensee or any third party resulting
 * from use of the Software.
 */

import java.sql.SQLException;

import com.quadcap.util.Debug;

/**
 * Base class for all filter cursor types.
 *
 * @author Stan Bailes
 */
public class FilterCursor extends CursorImpl {
    Cursor                              cursor;

    public FilterCursor(Session session) {
        super(session, null);
    }

    public FilterCursor(Session session, String name, Cursor cursor)
        throws SQLException
    {
        super(session, name);
        this.cursor = cursor;
        addColumns(session, cursor);
    }

    public FilterCursor(Session session, Cursor cursor)
        throws SQLException
    {
        super(session, cursor.getName(), cursor.getOuterCursor());
        this.cursor = cursor;
        addColumns(session, cursor);
    }

    protected void setCursor(Cursor cursor) {
        this.cursor = cursor;
    }
    
    public Row getRow() throws SQLException {
        return cursor.getRow();
    }

    public long getRowId() {
        return cursor.getRowId();
    }

    public void updateRow(Row row) throws SQLException {
        cursor.updateRow(row);
    }

    public void insertRow(Row row) throws SQLException {
        cursor.insertRow(row);
    }

    public void deleteRow() throws SQLException {
        cursor.deleteRow();
    }

    public void beforeFirst() throws SQLException {
        cursor.beforeFirst();
    }
    
    public void afterLast() throws SQLException {
        cursor.afterLast();
    }
    
    public boolean absolute(int row) throws SQLException {
        return cursor.absolute(row);
    }
    
    public boolean next() throws SQLException {
        return cursor.next();
    }

    public boolean prev() throws SQLException {
        return cursor.prev();
    }

    public boolean isWritable(int column) throws SQLException {
        return cursor.isWritable(column);
    }

    public void setOuterCursor(Cursor c) {
        super.setOuterCursor(c);
        if (cursor != null) cursor.setOuterCursor(c);
    }

    public void close() throws SQLException {
        cursor.close();
    }

    public long size() throws SQLException {
        return cursor.size();
    }

    //#ifdef DEBUG
    public String toString() {
        return super.toString() + "  (filters: " + cursor + ")";
    }
    //#endif
}