Bug 149617 Support Content-type-based editor lookup
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/ReportPlugin.java
return null;
				}
				return new String( customNameArray[i] );
			}
		}
		return null;
	}
	/**
	 * Convert the single string of preference into string array
	 * 
	 * @param preferenceValue
	 *            The specified element name
	 * @return String[] The array of strings
	 */
	private String[] convert( String preferenceValue )
	{
		String preferenceValueCopy = new String( );
		preferenceValueCopy = new String( PREFERENCE_DELIMITER )
				+ preferenceValue;
		String replaceString = new String( PREFERENCE_DELIMITER )
				+ new String( PREFERENCE_DELIMITER );
		String regrex = new String( PREFERENCE_DELIMITER )
				+ SPACE
				+ new String( PREFERENCE_DELIMITER );
		while ( preferenceValueCopy.indexOf( replaceString ) != -1 )
		{
			preferenceValueCopy = preferenceValueCopy.replaceFirst( replaceString,
					regrex );
		}
		StringTokenizer tokenizer = new StringTokenizer( preferenceValueCopy,