--- /dev/null Wed Jan 21 21:16:36 2015 +++ new/src/java.xml/share/classes/com/sun/org/apache/xpath/internal/jaxp/XPathNodesImpl.java Wed Jan 21 21:16:36 2015 @@ -0,0 +1,100 @@ +/* + * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. Oracle designates this + * particular file as subject to the "Classpath" exception as provided + * by Oracle in the LICENSE file that accompanied this code. + * + * This code 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 General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +package com.sun.org.apache.xpath.internal.jaxp; + +import java.util.Iterator; +import javax.xml.xpath.XPathException; +import javax.xml.xpath.XPathNodes; +import javax.xml.xpath.XPathEvaluationResult.XPathResultType; +import org.w3c.dom.Node; +import org.w3c.dom.NodeList; + +/** + * This class implements XPathNodes that represents a set of nodes selected by + * evaluating an expression. + */ +public class XPathNodesImpl implements XPathNodes { + XPathResultType type; + Class elementType; + NodeList nodeList = null; + + public XPathNodesImpl(NodeList nodeList, XPathResultType type, Class elementType) { + this.nodeList = nodeList; + this.type = type; + this.elementType = elementType; + } + + @Override + public Iterator iterator() { + return new NodeSetIterator<>(elementType); + } + + class NodeSetIterator implements Iterator { + int currentIndex; + Class elementType; + NodeSetIterator(Class elementType) { + this.elementType = elementType; + } + public boolean hasNext() { + if (type != XPathResultType.NODE) { + throw new UnsupportedOperationException("Incorrect type: result" + + "type requested: " + type + ", but assumed" + + "Node."); + } + if (nodeList != null) { + return currentIndex < nodeList.getLength(); + } + + return false; + } + + public E next() { + if (nodeList != null && nodeList.getLength() > 0) { + return elementType.cast(nodeList.item(currentIndex++)); + } + return null; + } + } + + @Override + public int size() { + if (nodeList != null) { + return nodeList.getLength(); + } + return 0; + } + + @Override + public Node get(int index) throws XPathException { + if (index <0 || index >= size()) { + throw new IndexOutOfBoundsException("Index " + index + " is out of bounds"); + } + if (nodeList != null) { + return nodeList.item(index); + } + return null; + } +}