Bug 213959 [Regression]Blob computed column doesn't work
Description: [Regression]Blob type computed column doesn't work Build number: 2.3.0.v20071228-1005 Steps to reproduce: 1, New a sampleDB from table PRODUCTLINE 2, New a computed column A; type is Blob; expression is row["IMAGE"] 3, Preview in dataset Expected result: The dataset can be preview ok Actual result: Error happened Error log: A BIRT exception occurred. Plug-in Provider:Eclipse.org Plug-in Name:BIRT Data Engine Plug-in ID:org.eclipse.birt.data Version:2.3.0.v20071228-1005 Error Code:data.engine.CompCol.FailRetrieveValueComputedColumn Error Message:Fail to compute value for computed column "AAA". Can not convert the value of [B@1a9efcd to Blob type.
core/org.eclipse.birt.core/src/org/eclipse/birt/core/data/DataTypeUtil.java
source.toString( ), "BigDecimal"
					} );
		}
	}
	/**
	 * Number -> Boolean
	 * 		0 		-> false
	 * 		others 	-> true
	 * String -> Boolean
	 * 		"true" 	-> true (ignore case)
	 * 		"false" -> false (ignore case)
	 * 		other string will throw an exception
	 * Date -> Boolean
	 * 		throw exception
	 * @param source
	 * @return
	 * @throws BirtException
	 */
	public static Boolean toBoolean( Object source ) throws BirtException
	{
		if ( source == null )
			return Boolean.FALSE;
		if ( source instanceof Boolean )
		{
			return (Boolean) source;
		}
		else if ( source instanceof Number )
		{
			
			if ( ( (Number) source ).doubleValue( ) == 0 )