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Posted to commits@xerces.apache.org by mr...@apache.org on 2005/06/05 05:05:04 UTC
cvs commit: xml-xerces/java/samples/jaxp ParserAPIUsage.java
mrglavas 2005/06/04 20:05:04
Added: java/samples/jaxp ParserAPIUsage.java
Log:
A sample which demonstrates usage of the JAXP 1.3 Parser API.
Much thanks to Ankit Pasricha for writing large portions of this sample.
Revision Changes Path
1.1 xml-xerces/java/samples/jaxp/ParserAPIUsage.java
Index: ParserAPIUsage.java
===================================================================
/*
* Copyright 2005 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 jaxp;
import java.util.Vector;
import javax.xml.XMLConstants;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import javax.xml.transform.stream.StreamSource;
import javax.xml.validation.Schema;
import javax.xml.validation.SchemaFactory;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import org.xml.sax.helpers.DefaultHandler;
/**
* <p>A sample which demonstrates usage of the JAXP 1.3 Parser API.</p>
*
* @author Michael Glavassevich, IBM
* @author Ankit Pasricha, IBM
*
* @version $Id: ParserAPIUsage.java,v 1.1 2005/06/05 03:05:04 mrglavas Exp $
*/
public class ParserAPIUsage extends DefaultHandler {
// default settings
/** Default API to use. */
protected static final String DEFAULT_API_TO_USE = "sax";
/** Default XInclude processing support (false). */
protected static final boolean DEFAULT_XINCLUDE = false;
//
// Constructors
//
/** Default constructor. */
public ParserAPIUsage() {
} // <init>()
//
// ErrorHandler methods
//
/** Warning. */
public void warning(SAXParseException ex) throws SAXException {
printError("Warning", ex);
} // warning(SAXParseException)
/** Error. */
public void error(SAXParseException ex) throws SAXException {
printError("Error", ex);
} // error(SAXParseException)
/** Fatal error. */
public void fatalError(SAXParseException ex) throws SAXException {
printError("Fatal Error", ex);
throw ex;
} // fatalError(SAXParseException)
//
// Protected methods
//
/** Prints the error message. */
protected void printError(String type, SAXParseException ex) {
System.err.print("[");
System.err.print(type);
System.err.print("] ");
String systemId = ex.getSystemId();
if (systemId != null) {
int index = systemId.lastIndexOf('/');
if (index != -1)
systemId = systemId.substring(index + 1);
System.err.print(systemId);
}
System.err.print(':');
System.err.print(ex.getLineNumber());
System.err.print(':');
System.err.print(ex.getColumnNumber());
System.err.print(": ");
System.err.print(ex.getMessage());
System.err.println();
System.err.flush();
} // printError(String,SAXParseException)
public static void main(String[] argv) {
// is there anything to do?
if (argv.length == 0) {
printUsage();
System.exit(1);
}
// variables
ParserAPIUsage parserAPIUsage = new ParserAPIUsage();
Vector schemas = null;
String docURI = argv[argv.length - 1];
String apiToUse = DEFAULT_API_TO_USE;
boolean xincludeProcessing = DEFAULT_XINCLUDE;
// process arguments
for (int i = 0; i < argv.length - 1; ++i) {
String arg = argv[i];
if (arg.startsWith("-")) {
String option = arg.substring(1);
if (arg.equals("-a")) {
// process -a: schema documents
if (schemas == null) {
schemas = new Vector();
}
while (i + 1 < argv.length - 1 && !(arg = argv[i + 1]).startsWith("-")) {
schemas.add(arg);
++i;
}
continue;
}
if (arg.equals("-api")) {
if (i + 1 < argv.length - 1 && !(arg = argv[i + 1]).startsWith("-")) {
if (arg.equals("sax") || arg.equals("dom")) {
apiToUse = arg;
}
else {
System.err.println("error: unknown source type ("+arg+").");
}
}
continue;
}
if (option.equalsIgnoreCase("xi")) {
xincludeProcessing = option.equals("xi");
continue;
}
if (option.equals("h")) {
printUsage();
continue;
}
System.err.println("error: unknown option ("+option+").");
continue;
}
}
try {
// Build Schema from sources if there are any
Schema schema = null;
if (schemas != null && schemas.size() > 0) {
SchemaFactory factory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
factory.setErrorHandler(parserAPIUsage);
final int length = schemas.size();
StreamSource[] sources = new StreamSource[length];
for (int j = 0; j < length; ++j) {
sources[j] = new StreamSource((String) schemas.elementAt(j));
}
schema = factory.newSchema(sources);
}
if ("dom".equals(apiToUse)) {
// Create a DocumentBuilderFactory
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
dbf.setNamespaceAware(true);
dbf.setXIncludeAware(xincludeProcessing);
dbf.setSchema(schema);
// Create a DocumentBuilder
DocumentBuilder db = dbf.newDocumentBuilder();
// Parse, reset the parser and then parse again.
db.setErrorHandler(parserAPIUsage);
db.parse(docURI);
db.reset();
db.setErrorHandler(parserAPIUsage);
db.parse(docURI);
}
// "sax".equals(apiToUse)
else {
// Create a SAXParserFactory
SAXParserFactory spf = SAXParserFactory.newInstance();
spf.setNamespaceAware(true);
spf.setXIncludeAware(xincludeProcessing);
spf.setSchema(schema);
// Create a SAXParser
SAXParser sp = spf.newSAXParser();
// Parse, reset the parser and then parse again.
sp.parse(docURI, parserAPIUsage);
sp.reset();
sp.parse(docURI, parserAPIUsage);
}
}
catch (SAXParseException e) {
// ignore
}
catch (Exception e) {
System.err.println("error: Parse error occurred - "+e.getMessage());
if (e instanceof SAXException) {
Exception nested = ((SAXException)e).getException();
if (nested != null) {
e = nested;
}
}
e.printStackTrace(System.err);
}
} // main(String[])
//
// Private static methods
//
private static void printUsage() {
System.err.println("usage: java jaxp.ParserAPIUsage (options) uri");
System.err.println();
System.err.println("options:");
System.err.println(" -a uri ... Provide a list of schema documents.");
System.err.println(" -api (sax|dom) Select API to use (sax|dom).");
System.err.println(" -xi | -XI Turn on/off XInclude processing.");
System.err.println(" -h This help screen.");
System.err.println();
System.err.println("defaults:");
System.err.println(" API to use: " + DEFAULT_API_TO_USE);
System.err.print(" XInclude: ");
System.err.println(DEFAULT_XINCLUDE ? "on" : "off");
} // printUsage()
} // ParserAPIUsage
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