Bug 175637 NPE when input parameter to document in ReportRunner.[0600]
Description: NPE when input parameter to document in ReportRunner. Build number:2.2.0.v200702251739-M5-rebuild Steps to reproduce: 1. Unzip birt runtime package to get ReportEngine folder. 2. Copy attached report into the folder. 3. Run command as genReport -m run -p "sample=sample" -p "Cust=200" test1.rptdesign genReport -m render -p "sample=sample" -p "Cust=200" test1.rptdocument Expected result: In the second command, document need no parameters input, so just ignore the input parameter values. Actual result: NPE is thrown out. Error log: SEVERE: exception in parsing the paramters java.lang.NullPointerException at org.eclipse.birt.report.engine.api.ReportRunner.renderReport(ReportRu nner.java:304) at org.eclipse.birt.report.engine.api.ReportRunner.execute(ReportRunner. java:157) at org.eclipse.birt.report.engine.api.ReportRunner.main(ReportRunner.jav a:117)
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/api/ReportRunner.java
}
	/**
	 * read paramters from the param and add it into the params.
	 * 
	 * @param param
	 *            parameter string line. use '=' to separate the name and value.
	 * @param params
	 *            maps contains all the paramter name and value.
	 */
	protected void readParamString( String param, HashMap params )
	{
		if ( param == null || param.length( ) < 2 )
		{
			return;
		}
		int index = param.indexOf( "=" );
		if ( index < 1 )
		{
			return;
		}
		String name = param.substring( 0, index ).trim( );
		String value = param.substring( index + 1 ).trim( );
		if ( value.startsWith( "\"" ) && value.endsWith( "\"" )
				&& value.length( ) > 2 )
		{
			value = value.substring( 1, value.length( ) - 1 );
		}
		params.put( name, value );
	}
	/**