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1/*
2 * Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26/**
27*
28* @author SAAJ RI Development Team
29*/
30package com.sun.xml.internal.messaging.saaj.util;
31
32import java.util.Iterator;
33import java.util.NoSuchElementException;
34
35import org.w3c.dom.*;
36
37public class NamespaceContextIterator implements Iterator {
38    Node context;
39    NamedNodeMap attributes = null;
40    int attributesLength;
41    int attributeIndex;
42    Attr next = null;
43    Attr last = null;
44    boolean traverseStack = true;
45
46    public NamespaceContextIterator(Node context) {
47        this.context = context;
48        findContextAttributes();
49    }
50
51    public NamespaceContextIterator(Node context, boolean traverseStack) {
52        this(context);
53        this.traverseStack = traverseStack;
54    }
55
56    protected void findContextAttributes() {
57        while (context != null) {
58            int type = context.getNodeType();
59            if (type == Node.ELEMENT_NODE) {
60                attributes = context.getAttributes();
61                attributesLength = attributes.getLength();
62                attributeIndex = 0;
63                return;
64            } else {
65                context = null;
66            }
67        }
68    }
69
70    protected void findNext() {
71        while (next == null && context != null) {
72            for (; attributeIndex < attributesLength; ++attributeIndex) {
73                Node currentAttribute = attributes.item(attributeIndex);
74                String attributeName = currentAttribute.getNodeName();
75                if (attributeName.startsWith("xmlns")
76                    && (attributeName.length() == 5
77                        || attributeName.charAt(5) == ':')) {
78                    next = (Attr) currentAttribute;
79                    ++attributeIndex;
80                    return;
81                }
82            }
83            if (traverseStack) {
84                context = context.getParentNode();
85                findContextAttributes();
86            } else {
87                context = null;
88            }
89        }
90    }
91
92    @Override
93    public boolean hasNext() {
94        findNext();
95        return next != null;
96    }
97
98    @Override
99    public Object next() {
100        return getNext();
101    }
102
103    public Attr nextNamespaceAttr() {
104        return getNext();
105    }
106
107    protected Attr getNext() {
108        findNext();
109        if (next == null) {
110            throw new NoSuchElementException();
111        }
112        last = next;
113        next = null;
114        return last;
115    }
116
117    @Override
118    public void remove() {
119        if (last == null) {
120            throw new IllegalStateException();
121        }
122        ((Element) context).removeAttributeNode(last);
123    }
124
125}
126