Bug 123496 [IDE] Use operation validation API for IDE actions
We should use the Resources/Core operation validation API in the IDE actions for manipulating resources.
bundles/org.eclipse.ui.ide/extensions/org/eclipse/ui/actions/CopyFilesAndFoldersOperation.java
*/
	public void copyFilesInCurrentThread(URI[] uris, IContainer destination,
			IProgressMonitor monitor) {
		IFileStore[] stores = buildFileStores(uris);
		if (stores == null)
			return;
		copyFileStores(destination, stores, false, monitor);
	}
	/**
	 * Build the collection of fileStores that map to fileNames. If any of them
	 * cannot be found then match then return <code>null</code>.
	 * 
	 * @param uris
	 * @return IFileStore[]
	 */
	private IFileStore[] buildFileStores(URI[] uris) {
		IFileStore[] stores = new IFileStore[uris.length];
		for (int i = 0; i < uris.length; i++) {
			IFileStore store;
			try {
				store = EFS.getStore(uris[i]);
			} catch (CoreException e) {
				IDEWorkbenchPlugin.log(e.getMessage(), e);
				reportFileInfoNotFound(uris[i].toString());
				return null;
			}
			if (store == null) {
				reportFileInfoNotFound(uris[i].toString());
				return null;
			}