/*
* Copyright (C) 2009 eXo Platform SAS.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.exoplatform.services.web.css.model;
import org.w3c.css.sac.ConditionalSelector;
import org.w3c.css.sac.DescendantSelector;
import org.w3c.css.sac.ElementSelector;
import org.w3c.css.sac.Selector;
/**
* @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a>
* @version $Revision$
*/
public abstract class SelectorObject implements Selector
{
public static SelectorObject create(Selector selector)
{
if (selector instanceof ConditionalSelector)
{
ConditionalSelector conditional = (ConditionalSelector)selector;
return new ConditionalSelectorObject(conditional.getSelectorType(), (SimpleSelectorObject)create(conditional
.getSimpleSelector()), ConditionObject.create(conditional.getCondition()));
}
else if (selector instanceof ElementSelector)
{
ElementSelector element = (ElementSelector)selector;
return new ElementSelectorObject(element.getSelectorType(), element.getNamespaceURI(), element.getLocalName());
}
else if (selector instanceof DescendantSelector)
{
DescendantSelector descendant = (DescendantSelector)selector;
SimpleSelectorObject simple = (SimpleSelectorObject)create(descendant.getSimpleSelector());
SelectorObject ancestor = create(descendant.getAncestorSelector());
return new DescendantSelectorObject(descendant.getSelectorType(), ancestor, simple);
}
else
{
throw new UnsupportedOperationException("Cannot create selector object for " + selector);
}
}
private final short type;
public SelectorObject(short type)
{
this.type = type;
}
public short getSelectorType()
{
return type;
}
public boolean equals(Object obj)
{
if (obj == null)
{
return false;
}
if (obj == this)
{
return true;
}
if (obj instanceof SelectorObject)
{
SelectorObject that = (SelectorObject)obj;
if (type == that.type)
{
return safeEquals(that);
}
}
return false;
}
protected abstract boolean safeEquals(SelectorObject that);
}