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* Copyright 2004 The Apache Software Foundation
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package org.apache.catalina.util;
import org.w3c.dom.*;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
import java.io.Writer;
/**
* A sample DOM writer. This sample program illustrates how to
* traverse a DOM tree in order to print a document that is parsed.
*/
public class DOMWriter {
//
// Data
//
/** Default Encoding */
private static String
PRINTWRITER_ENCODING = "UTF8";
private static String MIME2JAVA_ENCODINGS[] =
{ "Default", "UTF-8", "US-ASCII", "ISO-8859-1", "ISO-8859-2", "ISO-8859-3", "ISO-8859-4",
"ISO-8859-5", "ISO-8859-6", "ISO-8859-7", "ISO-8859-8", "ISO-8859-9", "ISO-2022-JP",
"SHIFT_JIS", "EUC-JP","GB2312", "BIG5", "EUC-KR", "ISO-2022-KR", "KOI8-R", "EBCDIC-CP-US",
"EBCDIC-CP-CA", "EBCDIC-CP-NL", "EBCDIC-CP-DK", "EBCDIC-CP-NO", "EBCDIC-CP-FI", "EBCDIC-CP-SE",
"EBCDIC-CP-IT", "EBCDIC-CP-ES", "EBCDIC-CP-GB", "EBCDIC-CP-FR", "EBCDIC-CP-AR1",
"EBCDIC-CP-HE", "EBCDIC-CP-CH", "EBCDIC-CP-ROECE","EBCDIC-CP-YU",
"EBCDIC-CP-IS", "EBCDIC-CP-AR2", "UTF-16"
};
/** Output qualified names */
private boolean qualifiedNames = true;
/** Print writer. */
protected PrintWriter out;
/** Canonical output. */
protected boolean canonical;
public DOMWriter(String encoding, boolean canonical)
throws UnsupportedEncodingException {
out = new PrintWriter(new OutputStreamWriter(System.out, encoding));
this.canonical = canonical;
} // <init>(String,boolean)
//
// Constructors
//
/** Default constructor. */
public DOMWriter(boolean canonical) throws UnsupportedEncodingException {
this( getWriterEncoding(), canonical);
}
public DOMWriter(Writer writer, boolean canonical) {
out = new PrintWriter(writer);
this.canonical = canonical;
}
public boolean getQualifiedNames() {
return this.qualifiedNames;
}
public void setQualifiedNames(boolean qualifiedNames) {
this.qualifiedNames = qualifiedNames;
}
public static String getWriterEncoding( ) {
return (PRINTWRITER_ENCODING);
}// getWriterEncoding
public static void setWriterEncoding( String encoding ) {
if( encoding.equalsIgnoreCase( "DEFAULT" ) )
PRINTWRITER_ENCODING = "UTF8";
else if( encoding.equalsIgnoreCase( "UTF-16" ) )
PRINTWRITER_ENCODING = "Unicode";
else
PRINTWRITER_ENCODING = MIME2Java.convert( encoding );
}// setWriterEncoding
public static boolean isValidJavaEncoding( String encoding ) {
for ( int i = 0; i < MIME2JAVA_ENCODINGS.length; i++ )
if ( encoding.equals( MIME2JAVA_ENCODINGS[i] ) )
return (true);
return (false);
}// isValidJavaEncoding
/** Prints the specified node, recursively. */
public void print(Node node) {
// is there anything to do?
if ( node == null ) {
return;
}
int type = node.getNodeType();
switch ( type ) {
// print document
case Node.DOCUMENT_NODE: {
if ( !canonical ) {
String Encoding = getWriterEncoding();
if( Encoding.equalsIgnoreCase( "DEFAULT" ) )
Encoding = "UTF-8";
else if( Encoding.equalsIgnoreCase( "Unicode" ) )
Encoding = "UTF-16";
else
Encoding = MIME2Java.reverse( Encoding );
out.println("<?xml version=\"1.0\" encoding=\""+
Encoding + "\"?>");
}
print(((Document)node).getDocumentElement());
out.flush();
break;
}
// print element with attributes
case Node.ELEMENT_NODE: {
out.print('<');
if (this.qualifiedNames) {
out.print(node.getNodeName());
} else {
out.print(node.getLocalName());
}
Attr attrs[] = sortAttributes(node.getAttributes());
for ( int i = 0; i < attrs.length; i++ ) {
Attr attr = attrs[i];
out.print(' ');
if (this.qualifiedNames) {
out.print(attr.getNodeName());
} else {
out.print(attr.getLocalName());
}
out.print("=\"");
out.print(normalize(attr.getNodeValue()));
out.print('"');
}
out.print('>');
NodeList children = node.getChildNodes();
if ( children != null ) {
int len = children.getLength();
for ( int i = 0; i < len; i++ ) {
print(children.item(i));
}
}
break;
}
// handle entity reference nodes
case Node.ENTITY_REFERENCE_NODE: {
if ( canonical ) {
NodeList children = node.getChildNodes();
if ( children != null ) {
int len = children.getLength();
for ( int i = 0; i < len; i++ ) {
print(children.item(i));
}
}
} else {
out.print('&');
if (this.qualifiedNames) {
out.print(node.getNodeName());
} else {
out.print(node.getLocalName());
}
out.print(';');
}
break;
}
// print cdata sections
case Node.CDATA_SECTION_NODE: {
if ( canonical ) {
out.print(normalize(node.getNodeValue()));
} else {
out.print("<![CDATA[");
out.print(node.getNodeValue());
out.print("]]>");
}
break;
}
// print text
case Node.TEXT_NODE: {
out.print(normalize(node.getNodeValue()));
break;
}
// print processing instruction
case Node.PROCESSING_INSTRUCTION_NODE: {
out.print("<?");
if (this.qualifiedNames) {
out.print(node.getNodeName());
} else {
out.print(node.getLocalName());
}
String data = node.getNodeValue();
if ( data != null && data.length() > 0 ) {
out.print(' ');
out.print(data);
}
out.print("?>");
break;
}
}
if ( type == Node.ELEMENT_NODE ) {
out.print("</");
if (this.qualifiedNames) {
out.print(node.getNodeName());
} else {
out.print(node.getLocalName());
}
out.print('>');
}
out.flush();
} // print(Node)
/** Returns a sorted list of attributes. */
protected Attr[] sortAttributes(NamedNodeMap attrs) {
int len = (attrs != null) ? attrs.getLength() : 0;
Attr array[] = new Attr[len];
for ( int i = 0; i < len; i++ ) {
array[i] = (Attr)attrs.item(i);
}
for ( int i = 0; i < len - 1; i++ ) {
String name = null;
if (this.qualifiedNames) {
name = array[i].getNodeName();
} else {
name = array[i].getLocalName();
}
int index = i;
for ( int j = i + 1; j < len; j++ ) {
String curName = null;
if (this.qualifiedNames) {
curName = array[j].getNodeName();
} else {
curName = array[j].getLocalName();
}
if ( curName.compareTo(name) < 0 ) {
name = curName;
index = j;
}
}
if ( index != i ) {
Attr temp = array[i];
array[i] = array[index];
array[index] = temp;
}
}
return (array);
} // sortAttributes(NamedNodeMap):Attr[]
/** Normalizes the given string. */
protected String normalize(String s) {
StringBuilder str = new StringBuilder();
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 '\r':
case '\n': {
if ( canonical ) {
str.append("&#");
str.append(Integer.toString(ch));
str.append(';');
break;
}
// else, default append char
}
default: {
str.append(ch);
}
}
}
return (str.toString());
} // normalize(String):String
/*
private static void printValidJavaEncoding() {
System.err.println( " ENCODINGS:" );
System.err.print( " " );
for( int i = 0;
i < MIME2JAVA_ENCODINGS.length; i++) {
System.err.print( MIME2JAVA_ENCODINGS[i] + " " );
if( (i % 7 ) == 0 ){
System.err.println();
System.err.print( " " );
}
}
} // printJavaEncoding()
*/
}