Bug 173389 Exception is thrown when edit the cascading parameter group[0002]
Exception is thrown when edit the cascading parameter group[0002] Build number: 2.2.0.v20070208-1000 Steps to reproduce: 1.new a sample data source and select CUSTOMERS table as data set 2.new a cascading parameter group and use the data set,select the CUSTOMERNAME ,drag the parameter to layout then preview 3.switch to data explorer ,click the parameter ,change the CUSTOMERNAME to CUSTOMERNUMBER 4.preview in layout Expected result: No exception thrown Actual result: Exception thrown Error log: see attached image
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/service/api/ParameterDefinition.java
private String pattern;
	private String displayFormat;
	private String displayName;
	private String helpText;
	private String promptText;
	private int dataType;
	private int controlType;
	private boolean hidden;
	private boolean allowNull;
	private boolean allowBlank;
	private boolean mustMatch;
	private boolean concealValue;
	private ParameterGroupDefinition group;
	private Collection selectionList;
	public ParameterDefinition( long id, String name, String pattern,
			String displayFormat, String displayName, String helpText,
			String promptText, int dataType, int controlType, boolean hidden,
			boolean allowNull, boolean allowBlank, boolean mustMatch,
			boolean concealValue, ParameterGroupDefinition group,
			Collection selectionList )
	{
		this.id = id;
		this.name = name;
		this.pattern = pattern;
		this.displayFormat = displayFormat;
		this.displayName = displayName;
		this.helpText = helpText;
		this.promptText = promptText;
		this.dataType = dataType;
		this.controlType = controlType;