Bug 163749 Import BIRT runtime package to wtp will leave old birt files.
Description: Import BIRT runtime package to wtp will leave old birt files. Steps to reproduce: Prepare two birt builds. 1. Create a new BIRT Web Project with one build. 2. Use another build to open the same workspace, select the project and click Business Inteligent and Reporting Tools->Import BIRT runtime component. Expected result: Old birt runtime package will be replaced with new runtime package. Actual result: Old birt plugins were kept and new birt jar files are imported. e.g. org.eclipse.birt.report.engine_2.2.0.v20061101-0630.jar org.eclipse.birt.report.engine_2.2.0.v20061107-0635.jar
viewer/org.eclipse.birt.integration.wtp.ui/src/org/eclipse/birt/integration/wtp/ui/internal/wizards/BirtWizardUtil.java
private static List prepareFileList( ZipFileStructureProvider structure,
			ZipEntry entry, List list )
	{
		if ( structure == null || entry == null )
			return null;
		if ( list == null )
		{
			list = new ArrayList( );
		}
		
		List son = structure.getChildren( entry );
		if ( son == null )
			return list;
		
		Iterator it = son.iterator( );
		while ( it.hasNext( ) )
		{
			ZipEntry temp = (ZipEntry) it.next( );
			if ( temp.isDirectory( ) )
			{
				prepareFileList( structure, temp, list );
			}
			else
			{
				
				list.add( temp );
			}
		}
		return list;
	}