com.ibm.wsdl.util.xml.DOM2Writer Maven / Gradle / Ivy
/*
* (c) Copyright IBM Corp 2001, 2010
*/
package com.ibm.wsdl.util.xml;
import java.io.*;
import java.util.*;
import org.w3c.dom.*;
import com.ibm.wsdl.*;
import com.ibm.wsdl.util.*;
/**
* 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
{
/**
* The namespaceURI represented by the prefix xmlns.
*/
private static String NS_URI_XMLNS = "http://www.w3.org/2000/xmlns/";
/**
* The namespaceURI represented by the prefix xml.
*/
private static String NS_URI_XML = "http://www.w3.org/XML/1998/namespace";
private static Map xmlEncodingMap = new HashMap();
static
{
xmlEncodingMap.put(null, Constants.XML_DECL_DEFAULT);
xmlEncodingMap.put(System.getProperty("file.encoding"),
Constants.XML_DECL_DEFAULT);
xmlEncodingMap.put("UTF8", "UTF-8");
xmlEncodingMap.put("UTF-16", "UTF-16");
xmlEncodingMap.put("UnicodeBig", "UTF-16");
xmlEncodingMap.put("UnicodeLittle", "UTF-16");
xmlEncodingMap.put("ASCII", "US-ASCII");
xmlEncodingMap.put("ISO8859_1", "ISO-8859-1");
xmlEncodingMap.put("ISO8859_2", "ISO-8859-2");
xmlEncodingMap.put("ISO8859_3", "ISO-8859-3");
xmlEncodingMap.put("ISO8859_4", "ISO-8859-4");
xmlEncodingMap.put("ISO8859_5", "ISO-8859-5");
xmlEncodingMap.put("ISO8859_6", "ISO-8859-6");
xmlEncodingMap.put("ISO8859_7", "ISO-8859-7");
xmlEncodingMap.put("ISO8859_8", "ISO-8859-8");
xmlEncodingMap.put("ISO8859_9", "ISO-8859-9");
xmlEncodingMap.put("ISO8859_13", "ISO-8859-13");
xmlEncodingMap.put("ISO8859_15_FDIS", "ISO-8859-15");
xmlEncodingMap.put("GBK", "GBK");
xmlEncodingMap.put("Big5", "Big5");
}
/**
* Return a string containing this node serialized as XML.
*/
public static String nodeToString(Node node)
{
return nodeToString(node, new HashMap());
}
/**
* Return a string containing this node serialized as XML.
* The specified Map associates prefixes with namespace URLs.
*/
public static String nodeToString(Node node, Map namespaces)
{
StringWriter sw = new StringWriter();
serializeAsXML(node, namespaces, sw);
return sw.toString();
}
/**
* Print an XML declaration before serializing the element.
*/
public static void serializeElementAsDocument(Element el, Writer writer)
{
serializeElementAsDocument(el, new HashMap(), writer);
}
/**
* Print an XML declaration before serializing the element.
* The specified Map associates prefixes with namespace URLs.
*/
public static void serializeElementAsDocument(Element el, Map namespaces, Writer writer)
{
PrintWriter pw = new PrintWriter(writer);
String javaEncoding = (writer instanceof OutputStreamWriter)
? ((OutputStreamWriter) writer).getEncoding()
: null;
String xmlEncoding = java2XMLEncoding(javaEncoding);
if (xmlEncoding != null)
{
pw.println(Constants.XML_DECL_START +
xmlEncoding +
Constants.XML_DECL_END);
}
else
{
pw.println("");
}
serializeAsXML(el, namespaces, writer);
}
/**
* Serialize this node into the writer as XML.
*/
public static void serializeAsXML(Node node, Writer writer)
{
serializeAsXML(node, new HashMap(), writer);
}
/**
* Serialize this node into the writer as XML.
* The specified Map associates prefixes with namespace URLs.
*/
public static void serializeAsXML(Node node, Map namespaces, Writer writer)
{
ObjectRegistry namespaceStack = new ObjectRegistry(namespaces);
namespaceStack.register("xml", NS_URI_XML);
PrintWriter pw = new PrintWriter(writer);
String javaEncoding = (writer instanceof OutputStreamWriter)
? ((OutputStreamWriter) writer).getEncoding()
: null;
print(node, namespaceStack, pw, java2XMLEncoding(javaEncoding));
}
private static void print(Node node, ObjectRegistry namespaceStack,
PrintWriter out, String xmlEncoding)
{
if (node == null)
{
return;
}
boolean hasChildren = false;
int type = node.getNodeType();
switch (type)
{
case Node.DOCUMENT_NODE :
{
if (xmlEncoding != null)
{
out.println(Constants.XML_DECL_START +
xmlEncoding +
Constants.XML_DECL_END);
}
else
{
out.println("");
}
Node child = node.getFirstChild();
while (child != null)
{
print(child,namespaceStack, out, xmlEncoding);
child = child.getNextSibling();
}
break;
}
case Node.ELEMENT_NODE :
{
namespaceStack = new ObjectRegistry(namespaceStack);
out.print('<' + node.getNodeName());
String elPrefix = node.getPrefix();
String elNamespaceURI = node.getNamespaceURI();
if (elPrefix != null && elNamespaceURI != null)
{
boolean prefixIsDeclared = false;
try
{
String namespaceURI = (String)namespaceStack.lookup(elPrefix);
if (elNamespaceURI.equals(namespaceURI))
{
prefixIsDeclared = true;
}
}
catch (IllegalArgumentException e)
{
// ignore this and carry on
}
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()) + '\"');
String attrPrefix = attr.getPrefix();
String attrNamespaceURI = attr.getNamespaceURI();
if (attrPrefix != null && attrNamespaceURI != null)
{
boolean prefixIsDeclared = false;
try
{
String namespaceURI = (String)namespaceStack.lookup(attrPrefix);
if (attrNamespaceURI.equals(namespaceURI))
{
prefixIsDeclared = true;
}
}
catch (IllegalArgumentException e)
{
// ignore this and carry on
}
if (!prefixIsDeclared)
{
printNamespaceDecl(attr, namespaceStack, out);
}
}
}
Node child = node.getFirstChild();
if (child != null)
{
hasChildren = true;
out.print('>');
while (child != null)
{
print(child, namespaceStack, out, xmlEncoding);
child = child.getNextSibling();
}
}
else
{
hasChildren = false;
out.print("/>");
}
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 :
{
out.print(normalize(node.getNodeValue()));
break;
}
case Node.COMMENT_NODE :
{
out.print("");
break;
}
case Node.PROCESSING_INSTRUCTION_NODE :
{
out.print(" 0)
{
out.print(' ');
out.print(data);
}
out.println("?>");
break;
}
}
if (type == Node.ELEMENT_NODE && hasChildren == true)
{
out.print("');
hasChildren = false;
}
}
public static String java2XMLEncoding(String javaEnc)
{
return (String)xmlEncodingMap.get(javaEnc);
}
private static void printNamespaceDecl(Node node,
ObjectRegistry 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,
ObjectRegistry namespaceStack,
PrintWriter out)
{
String namespaceURI = node.getNamespaceURI();
String prefix = node.getPrefix();
if (!(namespaceURI.equals(NS_URI_XMLNS) && prefix.equals("xmlns")))
{
if (DOMUtils.getAttributeNS(owner, NS_URI_XMLNS, prefix) == null)
{
out.print(" xmlns:" + prefix + "=\"" + namespaceURI + '\"');
}
}
else
{
prefix = node.getLocalName();
namespaceURI = node.getNodeValue();
}
namespaceStack.register(prefix, namespaceURI);
}
private static String normalize(String s)
{
StringBuffer str = new StringBuffer();
int len = (s != null) ? s.length() : 0;
for (int i = 0; i < len; i++)
{
char ch = s.charAt(i);
switch (ch)
{
case '<' :
{
str.append("<");
break;
}
case '>' :
{
str.append(">");
break;
}
case '&' :
{
str.append("&");
break;
}
case '"' :
{
str.append(""");
break;
}
case '\n' :
{
if (i > 0)
{
char lastChar = str.charAt(str.length() - 1);
if (lastChar != '\r')
{
str.append(StringUtils.lineSeparator);
}
else
{
str.append('\n');
}
}
else
{
str.append(StringUtils.lineSeparator);
}
break;
}
default :
{
str.append(ch);
}
}
}
return (str.toString());
}
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