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
throw new CoreException( ResourceConstants.INVALID_TYPE,
						resourceBundle );
		}
	}
	/**
	 * convert a object to given class
	 * Classes supported:
	 * 		Integer.class
	 * 		BigDecimal.class
	 * 		Boolean.class
     *      Time.class
	 * 		Date.class
	 * 		Double.class
	 * 		String.class
	 * 		Blob.class
	 * @param source
	 * @param toTypeClass
	 * @return
	 * @throws BirtException
	 */
	public static Object convert( Object source, Class toTypeClass )
			throws BirtException
	{
		if ( toTypeClass == DataType.getClass( DataType.ANY_TYPE ) )
			return source;
		if ( toTypeClass == Integer.class )
			return toInteger( source );
		if ( toTypeClass == BigDecimal.class )
			return toBigDecimal( source );
		if ( toTypeClass == Boolean.class )