////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Copyright (c) 2013 Saxonica Limited.
// This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
// If a copy of the MPL was not distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
// This Source Code Form is "Incompatible With Secondary Licenses", as defined by the Mozilla Public License, v. 2.0.
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

package net.sf.saxon.tree.linked;

import net.sf.saxon.pattern.NodeTest;
import net.sf.saxon.tree.iter.AxisIterator;
import net.sf.saxon.type.Type;

final class FollowingEnumeration extends TreeEnumeration {

    private NodeImpl root;

    public FollowingEnumeration(NodeImpl node, NodeTest nodeTest) {
        super(node, nodeTest);
        root = (DocumentImpl)node.getDocumentRoot();
        // skip the descendant nodes if any
        int type = node.getNodeKind();
        if (type==Type.ATTRIBUTE || type==Type.NAMESPACE) {
            next = node.getParent().getNextInDocument(root);
        } else {
            do {
                next = node.getNextSibling();
                if (next==null) node = node.getParent();
            } while (next==null && node!=null);
        }
        while (!conforms(next)) {
            step();
        }
    }

    protected void step() {
        next = next.getNextInDocument(root);
    }

    /**
    * Get another enumeration of the same nodes
    */

    /*@NotNull*/ public AxisIterator getAnother() {
        return new FollowingEnumeration(start, nodeTest);
    }

}

