org.metawidget.util.LayoutUtils Maven / Gradle / Ivy
// Metawidget
//
// This file is dual licensed under both the LGPL
// (http://www.gnu.org/licenses/lgpl-2.1.html) and the EPL
// (http://www.eclipse.org/org/documents/epl-v10.php). As a
// recipient of Metawidget, you may choose to receive it under either
// the LGPL or the EPL.
//
// Commercial licenses are also available. See http://metawidget.org
// for details.
package org.metawidget.util;
import static org.metawidget.inspector.InspectionResultConstants.*;
import java.util.Map;
/**
* Utilities for working with Layouts.
*
* Some of the logic behind Layout decisions can be a little involved, so we refactor it here.
*
* @author Richard Kennard
*/
public final class LayoutUtils {
//
// Public methods
//
/**
* Strips the first section off the section attribute (if any).
*
* @param attributes
* the attributes. If there is a section attribute, it will be modified to remove its
* leftmost section (ie. 'foo' in 'foo,bar,baz')
* @return the stripped section
*/
public static String stripSection( Map attributes ) {
String sections = attributes.remove( SECTION );
// (null means 'no change to current section')
if ( sections == null ) {
return null;
}
String[] sectionsAsArray = ArrayUtils.fromString( sections );
switch ( sectionsAsArray.length ) {
// (empty String means 'end current section')
case 0:
return "";
case 1:
return sectionsAsArray[0];
default:
String section = sectionsAsArray[0];
attributes.put( SECTION, ArrayUtils.toString( ArrayUtils.removeAt( sectionsAsArray, 0 ) ) );
return section;
}
}
//
// Private constructor
//
private LayoutUtils() {
// Can never be called
}
}