org.apache.ws.security.util.DOM2Writer Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of wss4j Show documentation
Show all versions of wss4j Show documentation
The Apache WSS4J project provides a Java implementation of the primary security standards
for Web Services, namely the OASIS Web Services Security (WS-Security) specifications
from the OASIS Web Services Security TC.
/*
* Copyright 2003-2004 The Apache Software Foundation.
*
* Licensed 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 org.apache.ws.security.util;
import org.apache.ws.security.WSConstants;
import org.w3c.dom.Attr;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.Writer;
/**
* This class is a utility to serialize a DOM node as XML. This class
* uses the DOM Level 2 APIs.
* The main difference between this class and DOMWriter is that this class
* generates and prints out namespace declarations.
*
* @author Matthew J. Duftler ([email protected])
* @author Joseph Kesselman
*/
public class DOM2Writer {
public static final char NL = '\n';
public static final String LS = System.getProperty("line.separator",
(new Character(NL)).toString());
/**
* Return a string containing this node serialized as XML.
*/
public static String nodeToString(Node node) {
StringWriter sw = new StringWriter();
serializeAsXML(node, sw, true);
return sw.toString();
}
/**
* Return a string containing this node serialized as XML.
*/
public static String nodeToString(Node node, boolean omitXMLDecl) {
StringWriter sw = new StringWriter();
serializeAsXML(node, sw, omitXMLDecl);
return sw.toString();
}
/**
* Serialize this node into the writer as XML.
*/
public static void serializeAsXML(Node node, Writer writer,
boolean omitXMLDecl) {
serializeAsXML(node, writer, omitXMLDecl, false);
}
/**
* Serialize this node into the writer as XML.
*/
public static void serializeAsXML(Node node, Writer writer,
boolean omitXMLDecl,
boolean pretty) {
PrintWriter out = new PrintWriter(writer);
if (!omitXMLDecl) {
out.print("");
}
NSStack namespaceStack = new NSStack();
print(node, namespaceStack, out, pretty, 0);
out.flush();
}
private static void print(Node node, NSStack namespaceStack,
PrintWriter out, boolean pretty,
int indent) {
if (node == null) {
return;
}
boolean hasChildren = false;
int type = node.getNodeType();
switch (type) {
case Node.DOCUMENT_NODE:
{
NodeList children = node.getChildNodes();
if (children != null) {
int numChildren = children.getLength();
for (int i = 0; i < numChildren; i++) {
print(children.item(i), namespaceStack, out,
pretty, indent);
}
}
break;
}
case Node.ELEMENT_NODE:
{
namespaceStack.push();
if (pretty) {
for (int i = 0; i < indent; i++)
out.print(' ');
}
out.print('<' + node.getNodeName());
String elPrefix = node.getPrefix();
String elNamespaceURI = node.getNamespaceURI();
if (elPrefix != null &&
elNamespaceURI != null &&
elPrefix.length() > 0) {
boolean prefixIsDeclared = false;
try {
String namespaceURI = namespaceStack.getNamespaceURI(elPrefix);
if (elNamespaceURI.equals(namespaceURI)) {
prefixIsDeclared = true;
}
} catch (IllegalArgumentException e) {
//
}
if (!prefixIsDeclared) {
printNamespaceDecl(node, namespaceStack, out);
}
}
NamedNodeMap attrs = node.getAttributes();
int len = (attrs != null) ? attrs.getLength() : 0;
for (int i = 0; i < len; i++) {
Attr attr = (Attr) attrs.item(i);
out.print(' ' + attr.getNodeName() + "=\"");
normalize(attr.getValue(), out);
out.print('\"');
String attrPrefix = attr.getPrefix();
String attrNamespaceURI = attr.getNamespaceURI();
if (attrPrefix != null && attrNamespaceURI != null) {
boolean prefixIsDeclared = false;
try {
String namespaceURI = namespaceStack.getNamespaceURI(attrPrefix);
if (attrNamespaceURI.equals(namespaceURI)) {
prefixIsDeclared = true;
}
} catch (IllegalArgumentException e) {
//
}
if (!prefixIsDeclared) {
printNamespaceDecl(attr, namespaceStack, out);
}
}
}
NodeList children = node.getChildNodes();
if (children != null) {
int numChildren = children.getLength();
hasChildren = (numChildren > 0);
if (hasChildren) {
out.print('>');
if (pretty)
out.print(LS);
}
for (int i = 0; i < numChildren; i++) {
print(children.item(i), namespaceStack, out, pretty,
indent + 1);
}
} else {
hasChildren = false;
}
if (!hasChildren) {
out.print("/>");
if (pretty)
out.print(LS);
}
namespaceStack.pop();
break;
}
case Node.ENTITY_REFERENCE_NODE:
{
out.print('&');
out.print(node.getNodeName());
out.print(';');
break;
}
case Node.CDATA_SECTION_NODE:
{
out.print("");
break;
}
case Node.TEXT_NODE:
{
normalize(node.getNodeValue(), out);
break;
}
case Node.COMMENT_NODE:
{
out.print("");
if (pretty)
out.print(LS);
break;
}
case Node.PROCESSING_INSTRUCTION_NODE:
{
out.print(" 0) {
out.print(' ');
out.print(data);
}
out.println("?>");
if (pretty)
out.print(LS);
break;
}
}
if (type == Node.ELEMENT_NODE && hasChildren == true) {
if (pretty) {
for (int i = 0; i < indent; i++)
out.print(' ');
}
out.print("');
if (pretty)
out.print(LS);
hasChildren = false;
}
}
private static void printNamespaceDecl(Node node,
NSStack namespaceStack,
PrintWriter out) {
switch (node.getNodeType()) {
case Node.ATTRIBUTE_NODE:
{
printNamespaceDecl(((Attr) node).getOwnerElement(), node,
namespaceStack, out);
break;
}
case Node.ELEMENT_NODE:
{
printNamespaceDecl((Element) node, node, namespaceStack, out);
break;
}
}
}
private static void printNamespaceDecl(Element owner, Node node,
NSStack namespaceStack,
PrintWriter out) {
String namespaceURI = node.getNamespaceURI();
String prefix = node.getPrefix();
if (!(namespaceURI.equals(WSConstants.XMLNS_NS) && prefix.equals("xmlns")) &&
!(namespaceURI.equals(WSConstants.XML_NS) && prefix.equals("xml"))) {
if (WSSecurityUtil.getNamespace(prefix, owner) == null) {
out.print(" xmlns:" + prefix + "=\"" + namespaceURI + '\"');
}
} else {
prefix = node.getLocalName();
namespaceURI = node.getNodeValue();
}
namespaceStack.add(namespaceURI, prefix);
}
/**
* Normalizes and prints the given string.
*/
public static void normalize(String s, PrintWriter fOut) {
int len = (s != null) ? s.length() : 0;
for (int i = 0; i < len; i++) {
char c = s.charAt(i);
switch (c) {
case '<':
{
fOut.print("<");
break;
}
case '>':
{
fOut.print(">");
break;
}
case '&':
{
fOut.print("&");
break;
}
case '"':
{
fOut.print(""");
break;
}
case '\r':
case '\n':
default:
{
fOut.print(c);
}
}
}
}
}