/**********************************************************************************
* $URL: https://source.sakaiproject.org/svn/rwiki/trunk/rwiki-tool/tool/src/java/uk/ac/cam/caret/sakai/rwiki/tool/bean/DiffBean.java $
* $Id: DiffBean.java 84222 2010-11-03 13:15:52Z david.horwitz@uct.ac.za $
***********************************************************************************
*
* Copyright (c) 2003, 2004, 2005, 2006 The Sakai Foundation.
*
* Licensed under the Educational Community License, Version 1.0 (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.opensource.org/licenses/ecl1.php
*
* 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 uk.ac.cam.caret.sakai.rwiki.tool.bean;
import uk.ac.cam.caret.sakai.rwiki.service.api.RWikiObjectService;
import uk.ac.cam.caret.sakai.rwiki.service.api.model.RWikiObject;
/**
* DiffBean is a helper bean which given an <code>RWikiObject</code> and some
* strings representing the chosen left and right revision numbers will
* determine which revisions have been chosen and create a
* <code>GenericDiffBean</code> from the contents.
*
* @see GenericDiffBean
* @see uk.ac.cam.caret.sakai.rwiki.service.api.api.model.RWikiObject
* @version $Id: DiffBean.java 84222 2010-11-03 13:15:52Z david.horwitz@uct.ac.za $
* @author andrew
*/
public class DiffBean
{
/**
* RWikiHistoryObject representing the left revision (i.e. the old revision)
*/
private RWikiObject left;
/**
* RWikiHistoryObject representing the right revision (i.e. the new
* revision)
*/
private RWikiObject right;
/**
* The actual RWikiObject to which both left and right belong
*/
private RWikiObject rwo;
/**
*
*/
private RWikiObjectService rwikiObjectService;
/**
* The revision number of <code>right</code>
*/
private int rightVersionNumber;
/**
* The revision number of <code>left</code>
*/
private int leftVersionNumber;
/**
* A Generic Diff Bean which will be given the contents of the revisions
*/
private GenericDiffBean db;
/**
* Creates a DiffBean for the given RWikiObject, setting the left and right
* revision numbers as appropriate
*
* @param rwikiObject
* The RWikiObject to get revisions from
* @param left
* String representation of the left revision number. Must be either
* null, empty or a number.
* @param right
* String representation of the right revision number. Must be either
* null, empty or a number.
*/
public DiffBean(RWikiObject rwikiObject,
RWikiObjectService rwikiObjectService, String left, String right)
{
this.rwo = rwikiObject;
this.rwikiObjectService = rwikiObjectService;
this.leftVersionNumber = rwikiObject.getRevision().intValue() - 1;
this.rightVersionNumber = rwikiObject.getRevision().intValue();
if (this.leftVersionNumber < 0) this.leftVersionNumber = 0;
// Must be in this order... setRightVersionNumber sets the default
// value for the left revision.
this.setRightVersionNumber(right);
this.setLeftVersionNumber(left);
}
private void setLeftVersionNumber(String versionString)
{
if (versionString != null && !"".equals(versionString))
{
leftVersionNumber = Integer.parseInt(versionString);
}
try
{
if (rwo.getRevision().intValue() == leftVersionNumber)
{
left = rwo;
}
else
{
left = rwikiObjectService.getRWikiHistoryObject(rwo,
leftVersionNumber);
}
}
catch (IllegalArgumentException e)
{
throw new IllegalArgumentException(
"Invalid version number for left revision");
}
}
private void setRightVersionNumber(String versionString)
{
if (versionString != null && !"".equals(versionString))
{
rightVersionNumber = Integer.parseInt(versionString);
try
{
if (rwo.getRevision().intValue() == rightVersionNumber)
{
right = rwo;
}
else
right = rwikiObjectService.getRWikiHistoryObject(rwo,
rightVersionNumber);
}
catch (IllegalArgumentException e)
{
throw new IllegalArgumentException(
"Invalid version number for right revision");
}
}
else
{
right = rwikiObjectService.getRWikiObject(rwo);
}
// Finally set the default value for leftVersion
leftVersionNumber = rightVersionNumber > 0 ? rightVersionNumber - 1 : 0;
}
/**
* Get the selected left revision number.
*
* @return the left revision number.
*/
public int getLeftVersionNumber()
{
return leftVersionNumber;
}
/**
* Get the selected right revision number.
*
* @return the right revision number.
*/
public int getRightVersionNumber()
{
return rightVersionNumber;
}
/**
* @return Returns the RWikiObject this diffBean is related to.
*/
public RWikiObject getRwikiObject()
{
return rwo;
}
/**
* Gets the selected left revision
*
* @return left revision
*/
public RWikiObject getLeft()
{
return left;
}
/**
* Gets the selected right revision
*
* @return right revision
*/
public RWikiObject getRight()
{
return right;
}
/**
* Creates a <code>GenericDiffBean</code> using the contents of the left
* and right revisions
*
* @return a GenericDiffBean
*/
public GenericDiffBean getGenericDiffBean()
{
if (db == null)
{
db = new GenericDiffBean(left.getContent(), right.getContent());
}
return db;
}
}