/*
* The Apache Software License, Version 1.1
*
*
* Copyright (c) 1999 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Xerces" and "Apache Software Foundation" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation and was
* originally based on software copyright (c) 1999, International
* Business Machines, Inc., http://www.apache.org. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
package sax;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
import sax.helpers.AttributesImpl;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.DefaultHandler;
/**
* A sample SAX2 writer. This sample program illustrates how to
* register a SAX2 ContentHandler and receive the callbacks in
* order to print a document that is parsed.
*
* @version $Id: SAX2Writer.java,v 1.2 2000/05/10 00:38:34 lehors Exp $
*/
public class SAX2Writer
extends DefaultHandler {
//
// Constants
//
/** Default parser name. */
private static final String
DEFAULT_PARSER_NAME = "org.apache.xerces.parsers.SAXParser";
//
// Data
//
/** Print writer. */
protected PrintWriter out;
/** Canonical output. */
protected boolean canonical;
//
// Constructors
//
/** Default constructor. */
public SAX2Writer(boolean canonical) throws UnsupportedEncodingException {
this(null, canonical);
}
protected SAX2Writer(String encoding, boolean canonical) throws UnsupportedEncodingException {
if (encoding == null) {
encoding = "UTF8";
}
out = new PrintWriter(new OutputStreamWriter(System.out, encoding));
this.canonical = canonical;
} // <init>(String,boolean)
//
// Public static methods
//
/** Prints the output from the SAX callbacks. */
public static void print(String parserName, String uri, boolean canonical) {
try {
DefaultHandler handler = new SAX2Writer(canonical);
XMLReader parser = (XMLReader)Class.forName(parserName).newInstance();
parser.setContentHandler(handler);
parser.setErrorHandler(handler);
parser.parse(uri);
}
catch (Exception e) {
e.printStackTrace(System.err);
}
} // print(String,String,boolean)
//
// DocumentHandler methods
//
/** Processing instruction. */
public void processingInstruction(String target, String data) {
out.print("<?");
out.print(target);
if (data != null && data.length() > 0) {
out.print(' ');
out.print(data);
}
out.print("?>");
out.flush();
} // processingInstruction(String,String)
/** Start document. */
public void startDocument() {
if (!canonical) {
out.println("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
out.flush();
}
} // startDocument()
/** Start element. */
public void startElement(String uri, String local, String raw,
Attributes attrs) {
out.print('<');
out.print(raw);
if (attrs != null) {
attrs = sortAttributes(attrs);
int len = attrs.getLength();
for (int i = 0; i < len; i++) {
out.print(' ');
out.print(attrs.getQName(i));
out.print("=\"");
out.print(normalize(attrs.getValue(i)));
out.print('"');
}
}
out.print('>');
out.flush();
} // startElement(String,String,String,Attributes)
/** Characters. */
public void characters(char ch[], int start, int length) {
out.print(normalize(new String(ch, start, length)));
out.flush();
} // characters(char[],int,int);
/** Ignorable whitespace. */
public void ignorableWhitespace(char ch[], int start, int length) {
characters(ch, start, length);
out.flush();
} // ignorableWhitespace(char[],int,int);
/** End element. */
public void endElement(String uri, String local, String raw) {
out.print("</");
out.print(raw);
out.print('>');
out.flush();
} // endElement(String)
//
// ErrorHandler methods
//
/** Warning. */
public void warning(SAXParseException ex) {
System.err.println("[Warning] "+
getLocationString(ex)+": "+
ex.getMessage());
}
/** Error. */
public void error(SAXParseException ex) {
System.err.println("[Error] "+
getLocationString(ex)+": "+
ex.getMessage());
}
/** Fatal error. */
public void fatalError(SAXParseException ex) throws SAXException {
System.err.println("[Fatal Error] "+
getLocationString(ex)+": "+
ex.getMessage());
throw ex;
}
/** Returns a string of the location. */
private String getLocationString(SAXParseException ex) {
StringBuffer str = new StringBuffer();
String systemId = ex.getSystemId();
if (systemId != null) {
int index = systemId.lastIndexOf('/');
if (index != -1)
systemId = systemId.substring(index + 1);
str.append(systemId);
}
str.append(':');
str.append(ex.getLineNumber());
str.append(':');
str.append(ex.getColumnNumber());
return str.toString();
} // getLocationString(SAXParseException):String
//
// Protected static methods
//
/** Normalizes the given string. */
protected 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 '\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
/** Returns a sorted list of attributes. */
protected Attributes sortAttributes(Attributes attrs) {
AttributesImpl attributes = new AttributesImpl();
int len = (attrs != null) ? attrs.getLength() : 0;
for (int i = 0; i < len; i++) {
String name = attrs.getQName(i);
int count = attributes.getLength();
int j = 0;
while (j < count) {
if (name.compareTo(attributes.getQName(j)) < 0) {
break;
}
j++;
}
attributes.insertAttributeAt(j, name, attrs.getType(i),
attrs.getValue(i));
}
return attributes;
} // sortAttributes(AttributeList):AttributeList
//
// Main
//
/** Main program entry point. */
public static void main(String argv[]) {
// is there anything to do?
if (argv.length == 0) {
printUsage();
System.exit(1);
}
// vars
String parserName = DEFAULT_PARSER_NAME;
boolean canonical = false;
// check parameters
for (int i = 0; i < argv.length; i++) {
String arg = argv[i];
// options
if (arg.startsWith("-")) {
if (arg.equals("-p")) {
if (i == argv.length - 1) {
System.err.println("error: missing parser name");
System.exit(1);
}
parserName = argv[++i];
continue;
}
if (arg.equals("-c")) {
canonical = true;
continue;
}
if (arg.equals("-h")) {
printUsage();
System.exit(1);
}
}
// print uri
System.err.println(arg+':');
print(parserName, arg, canonical);
System.out.println();
}
} // main(String[])
/** Prints the usage. */
private static void printUsage() {
System.err.println("usage: java sax.SAX2Writer (options) uri ...");
System.err.println();
System.err.println("options:");
System.err.println(" -p name Specify SAX parser by name.");
System.err.println(" Default parser: "+DEFAULT_PARSER_NAME);
System.err.println(" -c Canonical XML output.");
System.err.println(" -h This help screen.");
} // printUsage()
} // class SAX2Writer