src/main/java/org/apache/jcp/xml/dsig/internal/dom/DOMSubTreeData.java [48:114]:
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        this.root = root;
        this.excludeComments = excludeComments;
    }

    @Override
    public Iterator<Node> iterator() {
        return new DelayedNodeIterator(root, excludeComments);
    }

    public Node getRoot() {
        return root;
    }

    public boolean excludeComments() {
        return excludeComments;
    }

    /**
     * This is an Iterator that contains a backing node-set that is
     * not populated until the caller first attempts to advance the iterator.
     */
    static class DelayedNodeIterator implements Iterator<Node> {
        private Node root;
        private List<Node> nodeSet;
        private ListIterator<Node> li;
        private boolean withComments;

        DelayedNodeIterator(Node root, boolean excludeComments) {
            this.root = root;
            this.withComments = !excludeComments;
        }

        @Override
        public boolean hasNext() {
            if (nodeSet == null) {
                nodeSet = dereferenceSameDocumentURI(root);
                li = nodeSet.listIterator();
            }
            return li.hasNext();
        }

        @Override
        public Node next() {
            if (nodeSet == null) {
                nodeSet = dereferenceSameDocumentURI(root);
                li = nodeSet.listIterator();
            }
            if (li.hasNext()) {
                return li.next();
            } else {
                throw new NoSuchElementException();
            }
        }

        @Override
        public void remove() {
            throw new UnsupportedOperationException();
        }

        /**
         * Dereferences a same-document URI fragment.
         *
         * @param node the node (document or element) referenced by the
         *	 URI fragment. If null, returns an empty set.
         * @return a set of nodes (minus any comment nodes)
         */
        private List<Node> dereferenceSameDocumentURI(Node node) {
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src/main/java/org/apache/xml/security/signature/reference/ReferenceSubTreeData.java [47:113]:
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        this.root = root;
        this.excludeComments = excludeComments;
    }

    @Override
    public Iterator<Node> iterator() {
        return new DelayedNodeIterator(root, excludeComments);
    }

    public Node getRoot() {
        return root;
    }

    public boolean excludeComments() {
        return excludeComments;
    }

    /**
     * This is an Iterator that contains a backing node-set that is
     * not populated until the caller first attempts to advance the iterator.
     */
    static class DelayedNodeIterator implements Iterator<Node> {
        private Node root;
        private List<Node> nodeSet;
        private ListIterator<Node> li;
        private boolean withComments;

        DelayedNodeIterator(Node root, boolean excludeComments) {
            this.root = root;
            this.withComments = !excludeComments;
        }

        @Override
        public boolean hasNext() {
            if (nodeSet == null) {
                nodeSet = dereferenceSameDocumentURI(root);
                li = nodeSet.listIterator();
            }
            return li.hasNext();
        }

        @Override
        public Node next() {
            if (nodeSet == null) {
                nodeSet = dereferenceSameDocumentURI(root);
                li = nodeSet.listIterator();
            }
            if (li.hasNext()) {
                return li.next();
            } else {
                throw new NoSuchElementException();
            }
        }

        @Override
        public void remove() {
            throw new UnsupportedOperationException();
        }

        /**
         * Dereferences a same-document URI fragment.
         *
         * @param node the node (document or element) referenced by the
         *	 URI fragment. If null, returns an empty set.
         * @return a set of nodes (minus any comment nodes)
         */
        private List<Node> dereferenceSameDocumentURI(Node node) {
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