Mega Code Archive
Use JAXP Validation API to create a validator and validate input from a DOM which contains inline schemas and multiple validation root
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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/
import java.io.PrintWriter;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.NoSuchElementException;
import java.util.Vector;
import javax.xml.XMLConstants;
import javax.xml.namespace.NamespaceContext;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.Source;
import javax.xml.transform.dom.DOMSource;
import javax.xml.validation.Schema;
import javax.xml.validation.SchemaFactory;
import javax.xml.validation.Validator;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathExpression;
import javax.xml.xpath.XPathFactory;
import org.w3c.dom.Document;
import org.w3c.dom.NodeList;
import org.xml.sax.ErrorHandler;
import org.xml.sax.SAXException;
import org.xml.sax.SAXNotRecognizedException;
import org.xml.sax.SAXNotSupportedException;
import org.xml.sax.SAXParseException;
/**
* <p>
* A sample demonstrating how to use the JAXP 1.3 Validation API to create a
* validator and use the validator to validate input from a DOM which contains
* inline schemas and multiple validation roots. The output of this program
* shows the time spent executing the Validator.validate(Source) method.
* </p>
*
* <p>
* This class is useful as a "poor-man's" performance tester to compare the
* speed of various JAXP 1.3 validators with different input sources. However,
* it is important to note that the first validation time of a validator will
* include both VM class load time and validator initialization that would not
* be present in subsequent validations with the same document.
* </p>
*
* <p>
* <strong>Note:</strong> The results produced by this program should never be
* accepted as true performance measurements.
* </p>
*
* @author Michael Glavassevich, IBM
*
* @version $Id: InlineSchemaValidator.java 447685 2006-09-19 02:37:49Z mrglavas $
*/
public class InlineSchemaValidator implements ErrorHandler, NamespaceContext {
//
// Constants
//
// feature ids
/**
* Schema full checking feature id
* (http://apache.org/xml/features/validation/schema-full-checking).
*/
protected static final String SCHEMA_FULL_CHECKING_FEATURE_ID = "http://apache.org/xml/features/validation/schema-full-checking";
/**
* Honour all schema locations feature id
* (http://apache.org/xml/features/honour-all-schemaLocations).
*/
protected static final String HONOUR_ALL_SCHEMA_LOCATIONS_ID = "http://apache.org/xml/features/honour-all-schemaLocations";
/**
* Validate schema annotations feature id
* (http://apache.org/xml/features/validate-annotations)
*/
protected static final String VALIDATE_ANNOTATIONS_ID = "http://apache.org/xml/features/validate-annotations";
/**
* Generate synthetic schema annotations feature id
* (http://apache.org/xml/features/generate-synthetic-annotations).
*/
protected static final String GENERATE_SYNTHETIC_ANNOTATIONS_ID = "http://apache.org/xml/features/generate-synthetic-annotations";
// default settings
/** Default schema language (http://www.w3.org/2001/XMLSchema). */
protected static final String DEFAULT_SCHEMA_LANGUAGE = XMLConstants.W3C_XML_SCHEMA_NS_URI;
/** Default repetition (1). */
protected static final int DEFAULT_REPETITION = 1;
/** Default schema full checking support (false). */
protected static final boolean DEFAULT_SCHEMA_FULL_CHECKING = false;
/** Default honour all schema locations (false). */
protected static final boolean DEFAULT_HONOUR_ALL_SCHEMA_LOCATIONS = false;
/** Default validate schema annotations (false). */
protected static final boolean DEFAULT_VALIDATE_ANNOTATIONS = false;
/** Default generate synthetic schema annotations (false). */
protected static final boolean DEFAULT_GENERATE_SYNTHETIC_ANNOTATIONS = false;
/** Default memory usage report (false). */
protected static final boolean DEFAULT_MEMORY_USAGE = false;
//
// Data
//
/** Print writer. */
protected PrintWriter fOut = new PrintWriter(System.out);
/** Prefix to URI mappings for the NamespaceContext. */
protected HashMap fPrefixToURIMappings;
/** URI to prefix mappings for the NamespaceContext. */
protected HashMap fURIToPrefixMappings;
//
// Constructors
//
public InlineSchemaValidator(HashMap prefixToURIMappings, HashMap uriToPrefixMappings) {
fPrefixToURIMappings = prefixToURIMappings;
fURIToPrefixMappings = uriToPrefixMappings;
} // <init>(HashMap,HashMap)
//
// Public methods
//
public void validate(Validator validator, Source source, String systemId, int repetitions,
boolean memoryUsage) {
try {
long timeBefore = System.currentTimeMillis();
long memoryBefore = Runtime.getRuntime().freeMemory();
for (int j = 0; j < repetitions; ++j) {
validator.validate(source);
}
long memoryAfter = Runtime.getRuntime().freeMemory();
long timeAfter = System.currentTimeMillis();
long time = timeAfter - timeBefore;
long memory = memoryUsage ? memoryBefore - memoryAfter : Long.MIN_VALUE;
printResults(fOut, systemId, time, memory, repetitions);
} catch (SAXParseException e) {
// ignore
} catch (Exception e) {
System.err.println("error: Parse error occurred - " + e.getMessage());
Exception se = e;
if (e instanceof SAXException) {
se = ((SAXException) e).getException();
}
if (se != null)
se.printStackTrace(System.err);
else
e.printStackTrace(System.err);
}
} // validate(Validator,Source,String,int,boolean)
/** Prints the results. */
public void printResults(PrintWriter out, String uri, long time, long memory, int repetition) {
// filename.xml: 631 ms
out.print(uri);
out.print(": ");
if (repetition == 1) {
out.print(time);
} else {
out.print(time);
out.print('/');
out.print(repetition);
out.print('=');
out.print(((float) time) / repetition);
}
out.print(" ms");
if (memory != Long.MIN_VALUE) {
out.print(", ");
out.print(memory);
out.print(" bytes");
}
out.println();
out.flush();
} // printResults(PrintWriter,String,long,long,int)
//
// 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)
//
// NamespaceContext methods
//
public String getNamespaceURI(String prefix) {
if (prefix == null) {
throw new IllegalArgumentException("Prefix cannot be null.");
} else if (XMLConstants.XML_NS_PREFIX.equals(prefix)) {
return XMLConstants.XML_NS_URI;
} else if (XMLConstants.XMLNS_ATTRIBUTE.equals(prefix)) {
return XMLConstants.XMLNS_ATTRIBUTE_NS_URI;
} else if (fPrefixToURIMappings != null) {
String uri = (String) fPrefixToURIMappings.get(prefix);
if (uri != null) {
return uri;
}
}
return XMLConstants.NULL_NS_URI;
} // getNamespaceURI(String)
public String getPrefix(String namespaceURI) {
if (namespaceURI == null) {
throw new IllegalArgumentException("Namespace URI cannot be null.");
} else if (XMLConstants.XML_NS_URI.equals(namespaceURI)) {
return XMLConstants.XML_NS_PREFIX;
} else if (XMLConstants.XMLNS_ATTRIBUTE_NS_URI.equals(namespaceURI)) {
return XMLConstants.XMLNS_ATTRIBUTE;
} else if (fURIToPrefixMappings != null) {
HashSet prefixes = (HashSet) fURIToPrefixMappings.get(namespaceURI);
if (prefixes != null && prefixes.size() > 0) {
return (String) prefixes.iterator().next();
}
}
return null;
} // getPrefix(String)
public Iterator getPrefixes(String namespaceURI) {
if (namespaceURI == null) {
throw new IllegalArgumentException("Namespace URI cannot be null.");
} else if (XMLConstants.XML_NS_URI.equals(namespaceURI)) {
return new Iterator() {
boolean more = true;
public boolean hasNext() {
return more;
}
public Object next() {
if (!hasNext()) {
throw new NoSuchElementException();
}
more = false;
return XMLConstants.XML_NS_PREFIX;
}
public void remove() {
throw new UnsupportedOperationException();
}
};
} else if (XMLConstants.XMLNS_ATTRIBUTE_NS_URI.equals(namespaceURI)) {
return new Iterator() {
boolean more = true;
public boolean hasNext() {
return more;
}
public Object next() {
if (!hasNext()) {
throw new NoSuchElementException();
}
more = false;
return XMLConstants.XMLNS_ATTRIBUTE;
}
public void remove() {
throw new UnsupportedOperationException();
}
};
} else if (fURIToPrefixMappings != null) {
HashSet prefixes = (HashSet) fURIToPrefixMappings.get(namespaceURI);
if (prefixes != null && prefixes.size() > 0) {
return prefixes.iterator();
}
}
return Collections.EMPTY_LIST.iterator();
} // getPrefixes(String)
//
// 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)
//
// MAIN
//
/** Main program entry point. */
public static void main(String[] argv) {
// is there anything to do?
if (argv.length == 0) {
printUsage();
System.exit(1);
}
// variables
Vector schemas = null;
Vector instances = null;
HashMap prefixMappings = null;
HashMap uriMappings = null;
String docURI = argv[argv.length - 1];
String schemaLanguage = DEFAULT_SCHEMA_LANGUAGE;
int repetition = DEFAULT_REPETITION;
boolean schemaFullChecking = DEFAULT_SCHEMA_FULL_CHECKING;
boolean honourAllSchemaLocations = DEFAULT_HONOUR_ALL_SCHEMA_LOCATIONS;
boolean validateAnnotations = DEFAULT_VALIDATE_ANNOTATIONS;
boolean generateSyntheticAnnotations = DEFAULT_GENERATE_SYNTHETIC_ANNOTATIONS;
boolean memoryUsage = DEFAULT_MEMORY_USAGE;
// process arguments
for (int i = 0; i < argv.length - 1; ++i) {
String arg = argv[i];
if (arg.startsWith("-")) {
String option = arg.substring(1);
if (option.equals("l")) {
// get schema language name
if (++i == argv.length) {
System.err.println("error: Missing argument to -l option.");
} else {
schemaLanguage = argv[i];
}
continue;
}
if (option.equals("x")) {
if (++i == argv.length) {
System.err.println("error: Missing argument to -x option.");
continue;
}
String number = argv[i];
try {
int value = Integer.parseInt(number);
if (value < 1) {
System.err.println("error: Repetition must be at least 1.");
continue;
}
repetition = value;
} catch (NumberFormatException e) {
System.err.println("error: invalid number (" + number + ").");
}
continue;
}
if (arg.equals("-a")) {
// process -a: xpath expressions for schemas
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("-i")) {
// process -i: xpath expressions for instance documents
if (instances == null) {
instances = new Vector();
}
while (i + 1 < argv.length - 1 && !(arg = argv[i + 1]).startsWith("-")) {
instances.add(arg);
++i;
}
continue;
}
if (arg.equals("-nm")) {
String prefix;
String uri;
while (i + 2 < argv.length - 1 && !(prefix = argv[i + 1]).startsWith("-")
&& !(uri = argv[i + 2]).startsWith("-")) {
if (prefixMappings == null) {
prefixMappings = new HashMap();
uriMappings = new HashMap();
}
prefixMappings.put(prefix, uri);
HashSet prefixes = (HashSet) uriMappings.get(uri);
if (prefixes == null) {
prefixes = new HashSet();
uriMappings.put(uri, prefixes);
}
prefixes.add(prefix);
i += 2;
}
continue;
}
if (option.equalsIgnoreCase("f")) {
schemaFullChecking = option.equals("f");
continue;
}
if (option.equalsIgnoreCase("hs")) {
honourAllSchemaLocations = option.equals("hs");
continue;
}
if (option.equalsIgnoreCase("va")) {
validateAnnotations = option.equals("va");
continue;
}
if (option.equalsIgnoreCase("ga")) {
generateSyntheticAnnotations = option.equals("ga");
continue;
}
if (option.equalsIgnoreCase("m")) {
memoryUsage = option.equals("m");
continue;
}
if (option.equals("h")) {
printUsage();
continue;
}
System.err.println("error: unknown option (" + option + ").");
continue;
}
}
try {
// Create new instance of inline schema validator.
InlineSchemaValidator inlineSchemaValidator = new InlineSchemaValidator(prefixMappings,
uriMappings);
// Parse document containing schemas and validation roots
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
dbf.setNamespaceAware(true);
DocumentBuilder db = dbf.newDocumentBuilder();
db.setErrorHandler(inlineSchemaValidator);
Document doc = db.parse(docURI);
// Create XPath factory for selecting schema and validation roots
XPathFactory xpf = XPathFactory.newInstance();
XPath xpath = xpf.newXPath();
xpath.setNamespaceContext(inlineSchemaValidator);
// Select schema roots from the DOM
NodeList[] schemaNodes = new NodeList[schemas != null ? schemas.size() : 0];
for (int i = 0; i < schemaNodes.length; ++i) {
XPathExpression xpathSchema = xpath.compile((String) schemas.elementAt(i));
schemaNodes[i] = (NodeList) xpathSchema.evaluate(doc, XPathConstants.NODESET);
}
// Select validation roots from the DOM
NodeList[] instanceNodes = new NodeList[instances != null ? instances.size() : 0];
for (int i = 0; i < instanceNodes.length; ++i) {
XPathExpression xpathInstance = xpath.compile((String) instances.elementAt(i));
instanceNodes[i] = (NodeList) xpathInstance.evaluate(doc, XPathConstants.NODESET);
}
// Create SchemaFactory and configure
SchemaFactory factory = SchemaFactory.newInstance(schemaLanguage);
factory.setErrorHandler(inlineSchemaValidator);
try {
factory.setFeature(SCHEMA_FULL_CHECKING_FEATURE_ID, schemaFullChecking);
} catch (SAXNotRecognizedException e) {
System.err.println("warning: SchemaFactory does not recognize feature ("
+ SCHEMA_FULL_CHECKING_FEATURE_ID + ")");
} catch (SAXNotSupportedException e) {
System.err.println("warning: SchemaFactory does not support feature ("
+ SCHEMA_FULL_CHECKING_FEATURE_ID + ")");
}
try {
factory.setFeature(HONOUR_ALL_SCHEMA_LOCATIONS_ID, honourAllSchemaLocations);
} catch (SAXNotRecognizedException e) {
System.err.println("warning: SchemaFactory does not recognize feature ("
+ HONOUR_ALL_SCHEMA_LOCATIONS_ID + ")");
} catch (SAXNotSupportedException e) {
System.err.println("warning: SchemaFactory does not support feature ("
+ HONOUR_ALL_SCHEMA_LOCATIONS_ID + ")");
}
try {
factory.setFeature(VALIDATE_ANNOTATIONS_ID, validateAnnotations);
} catch (SAXNotRecognizedException e) {
System.err.println("warning: SchemaFactory does not recognize feature ("
+ VALIDATE_ANNOTATIONS_ID + ")");
} catch (SAXNotSupportedException e) {
System.err.println("warning: SchemaFactory does not support feature ("
+ VALIDATE_ANNOTATIONS_ID + ")");
}
try {
factory.setFeature(GENERATE_SYNTHETIC_ANNOTATIONS_ID, generateSyntheticAnnotations);
} catch (SAXNotRecognizedException e) {
System.err.println("warning: SchemaFactory does not recognize feature ("
+ GENERATE_SYNTHETIC_ANNOTATIONS_ID + ")");
} catch (SAXNotSupportedException e) {
System.err.println("warning: SchemaFactory does not support feature ("
+ GENERATE_SYNTHETIC_ANNOTATIONS_ID + ")");
}
// Build Schema from sources
Schema schema;
{
DOMSource[] sources;
int size = 0;
for (int i = 0; i < schemaNodes.length; ++i) {
size += schemaNodes[i].getLength();
}
sources = new DOMSource[size];
if (size == 0) {
schema = factory.newSchema();
} else {
int count = 0;
for (int i = 0; i < schemaNodes.length; ++i) {
NodeList nodeList = schemaNodes[i];
int nodeListLength = nodeList.getLength();
for (int j = 0; j < nodeListLength; ++j) {
sources[count++] = new DOMSource(nodeList.item(j));
}
}
schema = factory.newSchema(sources);
}
}
// Setup validator and input source.
Validator validator = schema.newValidator();
validator.setErrorHandler(inlineSchemaValidator);
try {
validator.setFeature(SCHEMA_FULL_CHECKING_FEATURE_ID, schemaFullChecking);
} catch (SAXNotRecognizedException e) {
System.err.println("warning: Validator does not recognize feature ("
+ SCHEMA_FULL_CHECKING_FEATURE_ID + ")");
} catch (SAXNotSupportedException e) {
System.err.println("warning: Validator does not support feature ("
+ SCHEMA_FULL_CHECKING_FEATURE_ID + ")");
}
try {
validator.setFeature(HONOUR_ALL_SCHEMA_LOCATIONS_ID, honourAllSchemaLocations);
} catch (SAXNotRecognizedException e) {
System.err.println("warning: Validator does not recognize feature ("
+ HONOUR_ALL_SCHEMA_LOCATIONS_ID + ")");
} catch (SAXNotSupportedException e) {
System.err.println("warning: Validator does not support feature ("
+ HONOUR_ALL_SCHEMA_LOCATIONS_ID + ")");
}
try {
validator.setFeature(VALIDATE_ANNOTATIONS_ID, validateAnnotations);
} catch (SAXNotRecognizedException e) {
System.err.println("warning: Validator does not recognize feature ("
+ VALIDATE_ANNOTATIONS_ID + ")");
} catch (SAXNotSupportedException e) {
System.err.println("warning: Validator does not support feature ("
+ VALIDATE_ANNOTATIONS_ID + ")");
}
try {
validator.setFeature(GENERATE_SYNTHETIC_ANNOTATIONS_ID, generateSyntheticAnnotations);
} catch (SAXNotRecognizedException e) {
System.err.println("warning: Validator does not recognize feature ("
+ GENERATE_SYNTHETIC_ANNOTATIONS_ID + ")");
} catch (SAXNotSupportedException e) {
System.err.println("warning: Validator does not support feature ("
+ GENERATE_SYNTHETIC_ANNOTATIONS_ID + ")");
}
// Validate instance documents
for (int i = 0; i < instanceNodes.length; ++i) {
NodeList nodeList = instanceNodes[i];
int nodeListLength = nodeList.getLength();
for (int j = 0; j < nodeListLength; ++j) {
DOMSource source = new DOMSource(nodeList.item(j));
source.setSystemId(docURI);
inlineSchemaValidator.validate(validator, source, docURI, repetition, memoryUsage);
}
}
} 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
//
/** Prints the usage. */
private static void printUsage() {
System.err.println("usage: java jaxp.InlineSchemaValidator (options) uri ...");
System.err.println();
System.err.println("options:");
System.err.println(" -l name Select schema language by name.");
System.err.println(" -x number Select number of repetitions.");
System.err.println(" -a xpath ... Provide a list of XPath expressions for schema roots");
System.err
.println(" -i xpath ... Provide a list of XPath expressions for validation roots");
System.err
.println(" -nm pre uri ... Provide a list of prefix to namespace URI mappings for the XPath expressions.");
System.err.println(" -f | -F Turn on/off Schema full checking.");
System.err
.println(" NOTE: Not supported by all schema factories and validators.");
System.err.println(" -hs | -HS Turn on/off honouring of all schema locations.");
System.err
.println(" NOTE: Not supported by all schema factories and validators.");
System.err.println(" -va | -VA Turn on/off validation of schema annotations.");
System.err
.println(" NOTE: Not supported by all schema factories and validators.");
System.err
.println(" -ga | -GA Turn on/off generation of synthetic schema annotations.");
System.err
.println(" NOTE: Not supported by all schema factories and validators.");
System.err.println(" -m | -M Turn on/off memory usage report");
System.err.println(" -h This help screen.");
System.err.println();
System.err.println("defaults:");
System.err.println(" Schema language: " + DEFAULT_SCHEMA_LANGUAGE);
System.err.println(" Repetition: " + DEFAULT_REPETITION);
System.err.print(" Schema full checking: ");
System.err.println(DEFAULT_SCHEMA_FULL_CHECKING ? "on" : "off");
System.err.print(" Honour all schema locations: ");
System.err.println(DEFAULT_HONOUR_ALL_SCHEMA_LOCATIONS ? "on" : "off");
System.err.print(" Validate annotations: ");
System.err.println(DEFAULT_VALIDATE_ANNOTATIONS ? "on" : "off");
System.err.print(" Generate synthetic annotations: ");
System.err.println(DEFAULT_GENERATE_SYNTHETIC_ANNOTATIONS ? "on" : "off");
System.err.print(" Memory: ");
System.err.println(DEFAULT_MEMORY_USAGE ? "on" : "off");
System.err.println();
System.err.println("notes:");
System.err
.println(" The speed and memory results from this program should NOT be used as the");
System.err
.println(" basis of parser performance comparison! Real analytical methods should be");
System.err
.println(" used. For better results, perform multiple document validations within the");
System.err
.println(" same virtual machine to remove class loading from parse time and memory usage.");
} // printUsage()
} // class InlineSchemaValidator
]]>