Class DestroyableHolder

java/src/org/opensc/util/DestroyableHolder.java:41–106

This class holds a map of destroyables, which will be destroyed recursively. @author wglas

 * @author wglas
 */
public class DestroyableHolder extends DestroyableChild implements DestroyableParent
{
	private Set<Destroyable> children;

	/**
	 * Constructs a holder without a parent.
	 */
	public DestroyableHolder()
	{
		super();
		this.children = null;
	}

	/* (non-Javadoc)
	 * @see org.opensc.pkcs11.util.DestroyableParent#register(javax.security.auth.Destroyable)
	 */
	public void register(Destroyable destroyable)
	{
		if (this.children == null)
			this.children = new HashSet<Destroyable>();
		
		this.children.add(destroyable);
	}
	
	/* (non-Javadoc)
	 * @see org.opensc.pkcs11.util.DestroyableParent#deregister(javax.security.auth.Destroyable)
	 */
	public void deregister(Destroyable destroyable)
	{
		if (this.children == null) return;
		
		this.children.remove(destroyable);
	}
	
	/**
	 * Constructs a holder with a parent.
	 */
	public DestroyableHolder(DestroyableParent parent)
	{
		super(parent);
		this.children = null;
	}

	/* (non-Javadoc)
	 * @see javax.security.auth.Destroyable#destroy()
	 */
	public void destroy() throws DestroyFailedException
	{
		if (this.children != null)
		{
			for (Destroyable destroyable : this.children)
			{
				if (destroyable.isDestroyed()) continue;
				
				if (destroyable instanceof DestroyableChild)
					((DestroyableChild)destroyable).unlink();
				
				destroyable.destroy();