com.github.simy4.xpath.dom.navigator.DomElementsIterable Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of xpath-to-xml-dom Show documentation

Convenient utility to build XML models by evaluating XPath expressions

There is a newer version: 2.3.9

package com.github.simy4.xpath.dom.navigator;

import org.w3c.dom.Node;

import java.util.Iterator;
import java.util.NoSuchElementException;

final class DomElementsIterable implements Iterable {

    private final Node parent;

    DomElementsIterable(Node parent) {
        this.parent = parent;
    }

    @Override
    public Iterator iterator() {
        return new DomElementsIterator(parent);
    }

    private static final class DomElementsIterator implements Iterator {

        private Node child;

        private DomElementsIterator(Node parent) {
            this.child = nextElement(parent.getFirstChild());
        }

        @Override
        public boolean hasNext() {
            return null != child;
        }

        @Override
        public DomNode next() {
            if (!hasNext()) {
                throw new NoSuchElementException("No more elements");
            }
            final Node next = child;
            child = nextElement(next.getNextSibling());
            return new DomNode(next);
        }

        private Node nextElement(Node next) {
            while (next != null && Node.ELEMENT_NODE != next.getNodeType()) {
                next = next.getNextSibling();
            }
            return next;
        }

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

    }

}