package com.tom_roush.pdfbox.pdmodel.documentinterchange.logicalstructure;
import java.util.ArrayList;
import java.util.List;
/**
* @author Johannes Koch
*
* @param <T> the type of object to store the revision numbers with
*/
public class Revisions<T>
{
private List<T> objects;
private List<Integer> revisionNumbers;
private List<T> getObjects()
{
if (this.objects == null)
{
this.objects = new ArrayList<T>();
}
return this.objects;
}
private List<Integer> getRevisionNumbers()
{
if (this.revisionNumbers == null)
{
this.revisionNumbers = new ArrayList<Integer>();
}
return this.revisionNumbers;
}
/**
*
*/
public Revisions()
{
}
/**
* Returns the object at the specified position.
*
* @param index the position
* @return the object
* @throws IndexOutOfBoundsException if the index is out of range
*/
public T getObject(int index)
{
return this.getObjects().get(index);
}
/**
* Returns the revision number at the specified position.
*
* @param index the position
* @return the revision number
* @throws IndexOutOfBoundsException if the index is out of range
*/
public int getRevisionNumber(int index)
{
return this.getRevisionNumbers().get(index);
}
/**
* Adds an object with a specified revision number.
*
* @param object the object
* @param revisionNumber the revision number
*/
public void addObject(T object, int revisionNumber)
{
this.getObjects().add(object);
this.getRevisionNumbers().add(revisionNumber);
}
/**
* Sets the revision number of a specified object.
*
* @param object the object
* @param revisionNumber the revision number
*/
protected void setRevisionNumber(T object, int revisionNumber)
{
int index = this.getObjects().indexOf(object);
if (index > -1)
{
this.getRevisionNumbers().set(index, revisionNumber);
}
}
/**
* Returns the size.
*
* @return the size
*/
public int size()
{
return this.getObjects().size();
}
/**
* {@inheritDoc}
*/
@Override
public String toString()
{
StringBuilder sb = new StringBuilder();
for (int i = 0; i < this.getObjects().size(); i++)
{
if (i > 0)
{
sb.append("; ");
}
sb.append("object=").append(this.getObjects().get(i))
.append(", revisionNumber=").append(this.getRevisionNumber(i));
}
return sb.toString();
}
}