Bug 183733 Implement the IScriptOjectClassInfo to provide the class infromation to support the JS code assistant.
Engine should implement the IScriptObjectClassInfo interface to return the class information for script object.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/executor/ExecutionContext.java
/**
	 * A list of script errors found in onPrepare. These will be added to the
	 * IReportContent, when one is available
	 * 
	 */
	private List onPrepareErrors = new ArrayList( );
	/**
	 * Flag to indicate whether task is canceled.
	 */
	private boolean isCancelled = false;
	
	/**
	 * flag to indicate if the task should be canceled on error
	 */
	private boolean cancelOnError = false;
	
	/**
	 * utilities used in the report execution.
	 */
	private HashMap stringFormatters = new HashMap( );
	private HashMap numberFormatters = new HashMap( );
	private HashMap dateFormatters = new HashMap( );
	private ClassLoader applicationClassLoader;
	
	private int MAX_ERRORS = 100;
	/**
	 * 
	 */
	private IDocArchiveReader dataSource;