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/** * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. */
package com.sun.org.apache.xml.internal.security.c14n.helper; import com.sun.org.apache.xml.internal.security.utils.Constants; import org.w3c.dom.Attr; import java.io.Serializable; import java.util.Comparator;
Compares two attributes based on the C14n specification.
  • Namespace nodes have a lesser document order position than attribute nodes.
  • An element's namespace nodes are sorted lexicographically by local name (the default namespace node, if one exists, has no local name and is therefore lexicographically least).
  • An element's attribute nodes are sorted lexicographically with namespace URI as the primary key and local name as the secondary key (an empty namespace URI is lexicographically least).
/** * Compares two attributes based on the C14n specification. * * <UL> * <LI>Namespace nodes have a lesser document order position than attribute * nodes. * <LI> An element's namespace nodes are sorted lexicographically by * local name (the default namespace node, if one exists, has no * local name and is therefore lexicographically least). * <LI> An element's attribute nodes are sorted lexicographically with * namespace URI as the primary key and local name as the secondary * key (an empty namespace URI is lexicographically least). * </UL> * */
public class AttrCompare implements Comparator<Attr>, Serializable { private static final long serialVersionUID = -7113259629930576230L; private static final int ATTR0_BEFORE_ATTR1 = -1; private static final int ATTR1_BEFORE_ATTR0 = 1; private static final String XMLNS = Constants.NamespaceSpecNS;
Compares two attributes based on the C14n specification.
  • Namespace nodes have a lesser document order position than attribute nodes.
  • An element's namespace nodes are sorted lexicographically by local name (the default namespace node, if one exists, has no local name and is therefore lexicographically least).
  • An element's attribute nodes are sorted lexicographically with namespace URI as the primary key and local name as the secondary key (an empty namespace URI is lexicographically least).
Params:
  • attr0 –
  • attr1 –
Returns:returns a negative integer, zero, or a positive integer as obj0 is less than, equal to, or greater than obj1
/** * Compares two attributes based on the C14n specification. * * <UL> * <LI>Namespace nodes have a lesser document order position than * attribute nodes. * <LI> An element's namespace nodes are sorted lexicographically by * local name (the default namespace node, if one exists, has no * local name and is therefore lexicographically least). * <LI> An element's attribute nodes are sorted lexicographically with * namespace URI as the primary key and local name as the secondary * key (an empty namespace URI is lexicographically least). * </UL> * * @param attr0 * @param attr1 * @return returns a negative integer, zero, or a positive integer as * obj0 is less than, equal to, or greater than obj1 * */
public int compare(Attr attr0, Attr attr1) { String namespaceURI0 = attr0.getNamespaceURI(); String namespaceURI1 = attr1.getNamespaceURI(); boolean isNamespaceAttr0 = XMLNS.equals(namespaceURI0); boolean isNamespaceAttr1 = XMLNS.equals(namespaceURI1); if (isNamespaceAttr0) { if (isNamespaceAttr1) { // both are namespaces String localname0 = attr0.getLocalName(); String localname1 = attr1.getLocalName(); if ("xmlns".equals(localname0)) { localname0 = ""; } if ("xmlns".equals(localname1)) { localname1 = ""; } return localname0.compareTo(localname1); } // attr0 is a namespace, attr1 is not return ATTR0_BEFORE_ATTR1; } else if (isNamespaceAttr1) { // attr1 is a namespace, attr0 is not return ATTR1_BEFORE_ATTR0; } // none is a namespace if (namespaceURI0 == null) { if (namespaceURI1 == null) { String name0 = attr0.getName(); String name1 = attr1.getName(); return name0.compareTo(name1); } return ATTR0_BEFORE_ATTR1; } else if (namespaceURI1 == null) { return ATTR1_BEFORE_ATTR0; } int a = namespaceURI0.compareTo(namespaceURI1); if (a != 0) { return a; } return attr0.getLocalName().compareTo(attr1.getLocalName()); } }