/**

  * Distribution License:

  * JSword is free software; you can redistribute it and/or modify it under

  * the terms of the GNU Lesser General Public License, version 2.1 or later

  * as published by the Free Software Foundation. This program is distributed

  * in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even

  * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

  * See the GNU Lesser General Public License for more details.

  *

  * The License is available on the internet at:

  *      http://www.gnu.org/copyleft/lgpl.html

  * or by writing to:

  *      Free Software Foundation, Inc.

  *      59 Temple Place - Suite 330

  *      Boston, MA 02111-1307, USA

  *

  * © CrossWire Bible Society, 2014 - 2016

  */

 package org.crosswire.jsword.book.sword;

 import java.io.IOException;

 import java.util.ArrayList;

 import java.util.List;

 import org.crosswire.jsword.book.BookException;

 import org.crosswire.jsword.book.sword.processing.RawTextToXmlProcessor;

 import org.crosswire.jsword.passage.DefaultKeyList;

 import org.crosswire.jsword.passage.Key;

 /**

  * A NullBackend is not attached to resources.

  *

  * @see gnu.lgpl.License The GNU Lesser General Public License for details.

  * @author DM Smith

  */

 public class NullBackend implements Backend {

     public NullBackend() {

     }

     /* (non-Javadoc)

      * @see org.crosswire.jsword.book.sword.Backend#getBookMetaData()

      */

     public SwordBookMetaData getBookMetaData() {

         return null;

     }

     /* (non-Javadoc)

      * @see org.crosswire.jsword.book.sword.Backend#decipher(byte[])

      */

     public void decipher(byte[] data) {

     }

     /* (non-Javadoc)

      * @see org.crosswire.jsword.book.sword.Backend#encipher(byte[])

      */

     public void encipher(byte[] data) {

     }

     /* (non-Javadoc)

      * @see org.crosswire.jsword.book.sword.Backend#readIndex()

      */

     public Key readIndex() {

         return new DefaultKeyList();

     }

     /* (non-Javadoc)

      * @see org.crosswire.jsword.book.sword.Backend#contains(org.crosswire.jsword.passage.Key)

      */

     public boolean contains(Key key) {

         return false;

     }

     /* (non-Javadoc)

      * @see org.crosswire.jsword.book.sword.Backend#getRawText(org.crosswire.jsword.passage.Key)

      */

     public String getRawText(Key key) throws BookException {

         return "";

     }

     /* (non-Javadoc)

      * @see org.crosswire.jsword.book.sword.Backend#setAliasKey(org.crosswire.jsword.passage.Key, org.crosswire.jsword.passage.Key)

      */

     public void setAliasKey(Key alias, Key source) throws BookException {

     }

     /* (non-Javadoc)

      * @see org.crosswire.jsword.book.sword.Backend#size(org.crosswire.jsword.passage.Key)

      */

     public int getRawTextLength(Key key) {

         return 0;

     }

     /* (non-Javadoc)

      * @see org.crosswire.jsword.book.sword.Backend#getGlobalKeyList()

      */

     public Key getGlobalKeyList() throws BookException {

         return new DefaultKeyList();

     }

     /* (non-Javadoc)

      * @see org.crosswire.jsword.book.sword.Backend#readToOsis(org.crosswire.jsword.passage.Key, org.crosswire.jsword.book.sword.processing.RawTextToXmlProcessor)

      */

     public List readToOsis(Key key, RawTextToXmlProcessor processor) throws BookException {

         return new ArrayList();

     }

     /* (non-Javadoc)

      * @see org.crosswire.jsword.book.sword.Backend#create()

      */

     public void create() throws IOException, BookException {

     }

     /* (non-Javadoc)

      * @see org.crosswire.jsword.book.sword.Backend#isSupported()

      */

     public boolean isSupported() {

         return true;

     }

     /* (non-Javadoc)

      * @see org.crosswire.jsword.book.sword.Backend#isWritable()

      */

     public boolean isWritable() {

         return false;

     }

 }