Bug 138562 Splite extendsexcpetion to seperate sub class
The suggestion is Parent invalid Cycle extends Different type extends Not top level extends
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/ModuleUtil.java
{
			public AbstractParseState startElement( String tagName )
			{
				if ( DesignSchemaConstants.STRUCTURE_TAG
						.equalsIgnoreCase( tagName ) )
					return new ActionStructureState( ActionParserHandler.this,
							element );
				return super.startElement( tagName );
			}
		}
	}
	/**
	 * Deserialize an input stream into an Action.
	 * 
	 * @param streamData
	 *            a stream represent an action.
	 * @return an internal Action structure
	 * @throws DesignFileException
	 *             if the exception occur when interpret the stream data.
	 */
	public static ActionHandle deserializeAction( InputStream streamData )