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Categories / Java / XML
 

Provides a complete trace of SAX2 events for files parsed

/*  * 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.OutputStream; import java.io.OutputStreamWriter; import java.io.PrintWriter; import java.io.UnsupportedEncodingException; import java.io.Writer; import org.xml.sax.AttributeList; import org.xml.sax.Attributes; import org.xml.sax.ContentHandler; import org.xml.sax.DocumentHandler; import org.xml.sax.DTDHandler; import org.xml.sax.ErrorHandler; import org.xml.sax.Locator; import org.xml.sax.Parser; import org.xml.sax.SAXException; import org.xml.sax.SAXNotRecognizedException; import org.xml.sax.SAXNotSupportedException; import org.xml.sax.SAXParseException; import org.xml.sax.XMLReader; import org.xml.sax.helpers.DefaultHandler; import org.xml.sax.helpers.ParserAdapter; import org.xml.sax.helpers.ParserFactory; import org.xml.sax.helpers.XMLReaderFactory; import org.xml.sax.ext.DeclHandler; import org.xml.sax.ext.LexicalHandler; /**  * Provides a complete trace of SAX2 events for files parsed. This is  * useful for making sure that a SAX parser implementation faithfully  * communicates all information in the document to the SAX handlers.  *  * @author Andy Clark, IBM  * @author Arnaud Le Hors, IBM  *  * @version $Id: DocumentTracer.java 447686 2006-09-19 02:38:34Z mrglavas $  */ public class DocumentTracer     extends DefaultHandler     implements ContentHandler, DTDHandler, ErrorHandler, // SAX2                DeclHandler, LexicalHandler, // SAX2 extensions                DocumentHandler // deprecated in SAX2     {     //     // Constants     //     // feature ids     /** Namespaces feature id (http://xml.org/sax/features/namespaces). */     protected static final String NAMESPACES_FEATURE_ID = "http://xml.org/sax/features/namespaces";          /** Namespace prefixes feature id (http://xml.org/sax/features/namespace-prefixes). */     protected static final String NAMESPACE_PREFIXES_FEATURE_ID = "http://xml.org/sax/features/namespace-prefixes";     /** Validation feature id (http://xml.org/sax/features/validation). */     protected static final String VALIDATION_FEATURE_ID = "http://xml.org/sax/features/validation";     /** Schema validation feature id (http://apache.org/xml/features/validation/schema). */     protected static final String SCHEMA_VALIDATION_FEATURE_ID = "http://apache.org/xml/features/validation/schema";     /** 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";          /** Dynamic validation feature id (http://apache.org/xml/features/validation/dynamic). */     protected static final String DYNAMIC_VALIDATION_FEATURE_ID = "http://apache.org/xml/features/validation/dynamic";          /** Load external DTD feature id (http://apache.org/xml/features/nonvalidating/load-external-dtd). */     protected static final String LOAD_EXTERNAL_DTD_FEATURE_ID = "http://apache.org/xml/features/nonvalidating/load-external-dtd";          /** XInclude feature id (http://apache.org/xml/features/xinclude). */     protected static final String XINCLUDE_FEATURE_ID = "http://apache.org/xml/features/xinclude";          /** XInclude fixup base URIs feature id (http://apache.org/xml/features/xinclude/fixup-base-uris). */     protected static final String XINCLUDE_FIXUP_BASE_URIS_FEATURE_ID = "http://apache.org/xml/features/xinclude/fixup-base-uris";          /** XInclude fixup language feature id (http://apache.org/xml/features/xinclude/fixup-language). */     protected static final String XINCLUDE_FIXUP_LANGUAGE_FEATURE_ID = "http://apache.org/xml/features/xinclude/fixup-language";     // property ids     /** Lexical handler property id (http://xml.org/sax/properties/lexical-handler). */     protected static final String LEXICAL_HANDLER_PROPERTY_ID = "http://xml.org/sax/properties/lexical-handler";     // default settings     /** Default parser name. */     protected static final String DEFAULT_PARSER_NAME = "org.apache.xerces.parsers.SAXParser";     /** Default namespaces support (true). */     protected static final boolean DEFAULT_NAMESPACES = true;          /** Default namespace prefixes (false). */     protected static final boolean DEFAULT_NAMESPACE_PREFIXES = false;     /** Default validation support (false). */     protected static final boolean DEFAULT_VALIDATION = false;          /** Default load external DTD (true). */     protected static final boolean DEFAULT_LOAD_EXTERNAL_DTD = true;     /** Default Schema validation support (false). */     protected static final boolean DEFAULT_SCHEMA_VALIDATION = false;     /** 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 dynamic validation support (false). */     protected static final boolean DEFAULT_DYNAMIC_VALIDATION = false;          /** Default XInclude processing support (false). */     protected static final boolean DEFAULT_XINCLUDE = false;          /** Default XInclude fixup base URIs support (true). */     protected static final boolean DEFAULT_XINCLUDE_FIXUP_BASE_URIS = true;          /** Default XInclude fixup language support (true). */     protected static final boolean DEFAULT_XINCLUDE_FIXUP_LANGUAGE = true;     //     // Data     //     /** Print writer. */     protected PrintWriter fOut;     /** Indent level. */     protected int fIndent;     //     // Constructors     //     /** Default constructor. */     public DocumentTracer() {         setOutput(new PrintWriter(System.out));     } // <init>()     //     // Public methods     //     /** Sets the output stream for printing. */     public void setOutput(OutputStream stream, String encoding)         throws UnsupportedEncodingException {         if (encoding == null) {             encoding = "UTF8";         }         Writer writer = new OutputStreamWriter(stream, encoding);         fOut = new PrintWriter(writer);     } // setOutput(OutputStream,String)     /** Sets the output writer. */     public void setOutput(Writer writer) {         fOut = writer instanceof PrintWriter              ? (PrintWriter)writer : new PrintWriter(writer);     } // setOutput(Writer)     //     // ContentHandler and DocumentHandler methods     //     /** Set document locator. */     public void setDocumentLocator(Locator locator) {         printIndent();         fOut.print("setDocumentLocator(");         fOut.print("locator=");         fOut.print(locator);         fOut.println(')');         fOut.flush();     } // setDocumentLocator(Locator)     /** Start document. */     public void startDocument() throws SAXException {         fIndent = 0;         printIndent();         fOut.println("startDocument()");         fOut.flush();         fIndent++;     } // startDocument()     /** Processing instruction. */     public void processingInstruction(String target, String data)         throws SAXException {         printIndent();         fOut.print("processingInstruction(");         fOut.print("target=");         printQuotedString(target);         fOut.print(',');         fOut.print("data=");         printQuotedString(data);         fOut.println(')');         fOut.flush();     } // processingInstruction(String,String)     /** Characters. */     public void characters(char[] ch, int offset, int length)         throws SAXException {         printIndent();         fOut.print("characters(");         fOut.print("text=");         printQuotedString(ch, offset, length);         fOut.println(')');         fOut.flush();     } // characters(char[],int,int)     /** Ignorable whitespace. */     public void ignorableWhitespace(char[] ch, int offset, int length)         throws SAXException {         printIndent();         fOut.print("ignorableWhitespace(");         fOut.print("text=");         printQuotedString(ch, offset, length);         fOut.println(')');         fOut.flush();     } // ignorableWhitespace(char[],int,int)     /** End document. */     public void endDocument() throws SAXException {         fIndent--;         printIndent();         fOut.println("endDocument()");         fOut.flush();     } // endDocument()     //     // ContentHandler methods     //     /** Start prefix mapping. */     public void startPrefixMapping(String prefix, String uri)         throws SAXException {         printIndent();         fOut.print("startPrefixMapping(");         fOut.print("prefix=");         printQuotedString(prefix);         fOut.print(',');         fOut.print("uri=");         printQuotedString(uri);         fOut.println(')');         fOut.flush();     } // startPrefixMapping(String,String)     /** Start element. */     public void startElement(String uri, String localName, String qname,                              Attributes attributes) throws SAXException {         printIndent();         fOut.print("startElement(");         fOut.print("uri=");         printQuotedString(uri);         fOut.print(',');         fOut.print("localName=");         printQuotedString(localName);         fOut.print(',');         fOut.print("qname=");         printQuotedString(qname);         fOut.print(',');         fOut.print("attributes=");         if (attributes == null) {             fOut.println("null");         }         else {             fOut.print('{');             int length = attributes.getLength();             for (int i = 0; i < length; i++) {                 if (i > 0) {                     fOut.print(',');                 }                 String attrLocalName = attributes.getLocalName(i);                 String attrQName = attributes.getQName(i);                 String attrURI = attributes.getURI(i);                 String attrType = attributes.getType(i);                 String attrValue = attributes.getValue(i);                 fOut.print('{');                 fOut.print("uri=");                 printQuotedString(attrURI);                 fOut.print(',');                 fOut.print("localName=");                 printQuotedString(attrLocalName);                 fOut.print(',');                 fOut.print("qname=");                 printQuotedString(attrQName);                 fOut.print(',');                 fOut.print("type=");                 printQuotedString(attrType);                 fOut.print(',');                 fOut.print("value=");                 printQuotedString(attrValue);                 fOut.print('}');             }             fOut.print('}');         }         fOut.println(')');         fOut.flush();         fIndent++;     } // startElement(String,String,String,Attributes)     /** End element. */     public void endElement(String uri, String localName, String qname)         throws SAXException {         fIndent--;         printIndent();         fOut.print("endElement(");         fOut.print("uri=");         printQuotedString(uri);         fOut.print(',');         fOut.print("localName=");         printQuotedString(localName);         fOut.print(',');         fOut.print("qname=");         printQuotedString(qname);         fOut.println(')');         fOut.flush();     } // endElement(String,String,String)     /** End prefix mapping. */     public void endPrefixMapping(String prefix) throws SAXException {         printIndent();         fOut.print("endPrefixMapping(");         fOut.print("prefix=");         printQuotedString(prefix);         fOut.println(')');         fOut.flush();     } // endPrefixMapping(String)     /** Skipped entity. */     public void skippedEntity(String name) throws SAXException {         printIndent();         fOut.print("skippedEntity(");         fOut.print("name=");         printQuotedString(name);         fOut.println(')');         fOut.flush();     } // skippedEntity(String)     //     // DocumentHandler methods     //     /** Start element. */     public void startElement(String name, AttributeList attributes)         throws SAXException {         printIndent();         fOut.print("startElement(");         fOut.print("name=");         printQuotedString(name);         fOut.print(',');         fOut.print("attributes=");         if (attributes == null) {             fOut.println("null");         }         else {             fOut.print('{');             int length = attributes.getLength();             for (int i = 0; i < length; i++) {                 if (i > 0) {                     System.out.print(',');                 }                 String attrName = attributes.getName(i);                 String attrType = attributes.getType(i);                 String attrValue = attributes.getValue(i);                 fOut.print('{');                 fOut.print("name=");                 printQuotedString(attrName);                 fOut.print(',');                 fOut.print("type=");                 printQuotedString(attrType);                 fOut.print(',');                 fOut.print("value=");                 printQuotedString(attrValue);                 fOut.print('}');             }             fOut.print('}');         }         fOut.println(')');         fOut.flush();         fIndent++;     } // startElement(String,AttributeList)     /** End element. */     public void endElement(String name) throws SAXException {         fIndent--;         printIndent();         fOut.print("endElement(");         fOut.print("name=");         printQuotedString(name);         fOut.println(')');         fOut.flush();     } // endElement(String)     //     // DTDHandler methods     //     /** Notation declaration. */     public void notationDecl(String name, String publicId, String systemId)         throws SAXException {         printIndent();         fOut.print("notationDecl(");         fOut.print("name=");         printQuotedString(name);         fOut.print(',');         fOut.print("publicId=");         printQuotedString(publicId);         fOut.print(',');         fOut.print("systemId=");         printQuotedString(systemId);         fOut.println(')');         fOut.flush();     } // notationDecl(String,String,String)     /** Unparsed entity declaration. */     public void unparsedEntityDecl(String name,                                    String publicId, String systemId,                                    String notationName) throws SAXException {         printIndent();         fOut.print("unparsedEntityDecl(");         fOut.print("name=");         printQuotedString(name);         fOut.print(',');         fOut.print("publicId=");         printQuotedString(publicId);         fOut.print(',');         fOut.print("systemId=");         printQuotedString(systemId);         fOut.print(',');         fOut.print("notationName=");         printQuotedString(notationName);         fOut.println(')');         fOut.flush();     } // unparsedEntityDecl(String,String,String,String)     //     // LexicalHandler methods     //     /** Start DTD. */     public void startDTD(String name, String publicId, String systemId)         throws SAXException {         printIndent();         fOut.print("startDTD(");         fOut.print("name=");         printQuotedString(name);         fOut.print(',');         fOut.print("publicId=");         printQuotedString(publicId);         fOut.print(',');         fOut.print("systemId=");         printQuotedString(systemId);         fOut.println(')');         fOut.flush();         fIndent++;     } // startDTD(String,String,String)     /** Start entity. */     public void startEntity(String name) throws SAXException {         printIndent();         fOut.print("startEntity(");         fOut.print("name=");         printQuotedString(name);         fOut.println(')');         fOut.flush();         fIndent++;     } // startEntity(String)     /** Start CDATA section. */     public void startCDATA() throws SAXException {         printIndent();         fOut.println("startCDATA()");         fOut.flush();         fIndent++;     } // startCDATA()     /** End CDATA section. */     public void endCDATA() throws SAXException {         fIndent--;         printIndent();         fOut.println("endCDATA()");         fOut.flush();     } // endCDATA()     /** Comment. */     public void comment(char[] ch, int offset, int length)         throws SAXException {         printIndent();         fOut.print("comment(");         fOut.print("text=");         printQuotedString(ch, offset, length);         fOut.println(')');         fOut.flush();     } // comment(char[],int,int)     /** End entity. */     public void endEntity(String name) throws SAXException {         fIndent--;         printIndent();         fOut.print("endEntity(");         fOut.print("name=");         printQuotedString(name);         fOut.println(')');     } // endEntity(String)     /** End DTD. */     public void endDTD() throws SAXException {         fIndent--;         printIndent();         fOut.println("endDTD()");         fOut.flush();     } // endDTD()     //     // DeclHandler methods     //     /** Element declaration. */     public void elementDecl(String name, String contentModel)         throws SAXException {         printIndent();         fOut.print("elementDecl(");         fOut.print("name=");         printQuotedString(name);         fOut.print(',');         fOut.print("contentModel=");         printQuotedString(contentModel);         fOut.println(')');         fOut.flush();     } // elementDecl(String,String)     /** Attribute declaration. */     public void attributeDecl(String elementName, String attributeName,                               String type, String valueDefault,                               String value) throws SAXException {         printIndent();         fOut.print("attributeDecl(");         fOut.print("elementName=");         printQuotedString(elementName);         fOut.print(',');         fOut.print("attributeName=");         printQuotedString(attributeName);         fOut.print(',');         fOut.print("type=");         printQuotedString(type);         fOut.print(',');         fOut.print("valueDefault=");         printQuotedString(valueDefault);         fOut.print(',');         fOut.print("value=");         printQuotedString(value);         fOut.println(')');         fOut.flush();     } // attributeDecl(String,String,String,String,String)     /** Internal entity declaration. */     public void internalEntityDecl(String name, String text)         throws SAXException {         printIndent();         fOut.print("internalEntityDecl(");         fOut.print("name=");         printQuotedString(name);         fOut.print(',');         fOut.print("text=");         printQuotedString(text);         fOut.println(')');         fOut.flush();     } // internalEntityDecl(String,String)     /** External entity declaration. */     public void externalEntityDecl(String name,                                    String publicId, String systemId)         throws SAXException {         printIndent();         fOut.print("externalEntityDecl(");         fOut.print("name=");         printQuotedString(name);         fOut.print(',');         fOut.print("publicId=");         printQuotedString(publicId);         fOut.print(',');         fOut.print("systemId=");         printQuotedString(systemId);         fOut.println(')');         fOut.flush();     } // externalEntityDecl(String,String,String)     //     // 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     //     /** Print quoted string. */     protected void printQuotedString(String s) {         if (s == null) {             fOut.print("null");             return;         }         fOut.print('"');         int length = s.length();         for (int i = 0; i < length; i++) {             char c = s.charAt(i);             normalizeAndPrint(c);         }         fOut.print('"');     } // printQuotedString(String)     /** Print quoted string. */     protected void printQuotedString(char[] ch, int offset, int length) {         fOut.print('"');         for (int i = 0; i < length; i++) {             normalizeAndPrint(ch[offset + i]);         }         fOut.print('"');     } // printQuotedString(char[],int,int)     /** Normalize and print. */     protected void normalizeAndPrint(char c) {         switch (c) {             case '\n': {                 fOut.print("\\n");                 break;             }             case '\r': {                 fOut.print("\\r");                 break;             }             case '\t': {                 fOut.print("\\t");                 break;             }             case '\\': {                 fOut.print("\\\\");                 break;             }             case '"': {                 fOut.print("\\\"");                 break;             }             default: {                 fOut.print(c);             }         }     } // normalizeAndPrint(char)     /** 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)     /** Prints the indent. */     protected void printIndent() {         for (int i = 0; i < fIndent; i++) {             fOut.print(' ');         }     }     //     // MAIN     //     /** Main. */     public static void main(String[] argv) throws Exception {         // is there anything to do?         if (argv.length == 0) {             printUsage();             System.exit(1);         }         // variables         DocumentTracer tracer = new DocumentTracer();         PrintWriter out = new PrintWriter(System.out);         XMLReader parser = null;         boolean namespaces = DEFAULT_NAMESPACES;         boolean namespacePrefixes = DEFAULT_NAMESPACE_PREFIXES;         boolean validation = DEFAULT_VALIDATION;         boolean externalDTD = DEFAULT_LOAD_EXTERNAL_DTD;         boolean schemaValidation = DEFAULT_SCHEMA_VALIDATION;         boolean schemaFullChecking = DEFAULT_SCHEMA_FULL_CHECKING;         boolean honourAllSchemaLocations = DEFAULT_HONOUR_ALL_SCHEMA_LOCATIONS;         boolean validateAnnotations = DEFAULT_VALIDATE_ANNOTATIONS;         boolean dynamicValidation = DEFAULT_DYNAMIC_VALIDATION;         boolean xincludeProcessing = DEFAULT_XINCLUDE;         boolean xincludeFixupBaseURIs = DEFAULT_XINCLUDE_FIXUP_BASE_URIS;         boolean xincludeFixupLanguage = DEFAULT_XINCLUDE_FIXUP_LANGUAGE;         // process arguments         for (int i = 0; i < argv.length; i++) {             String arg = argv[i];             if (arg.startsWith("-")) {                 String option = arg.substring(1);                 if (option.equals("p")) {                     // get parser name                     if (++i == argv.length) {                         System.err.println("error: Missing argument to -p option.");                     }                     String parserName = argv[i];                     // create parser                     try {                         parser = XMLReaderFactory.createXMLReader(parserName);                     }                     catch (Exception e) {                         try {                             Parser sax1Parser = ParserFactory.makeParser(parserName);                             parser = new ParserAdapter(sax1Parser);                             System.err.println("warning: Features and properties not supported on SAX1 parsers.");                         }                         catch (Exception ex) {                             parser = null;                             System.err.println("error: Unable to instantiate parser ("+parserName+")");                         }                     }                     continue;                 }                 if (option.equalsIgnoreCase("n")) {                     namespaces = option.equals("n");                     continue;                 }                 if (option.equalsIgnoreCase("np")) {                     namespacePrefixes = option.equals("np");                     continue;                 }                 if (option.equalsIgnoreCase("v")) {                     validation = option.equals("v");                     continue;                 }                 if (option.equalsIgnoreCase("xd")) {                     externalDTD = option.equals("xd");                     continue;                 }                 if (option.equalsIgnoreCase("s")) {                     schemaValidation = option.equals("s");                     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("dv")) {                     dynamicValidation = option.equals("dv");                     continue;                 }                 if (option.equalsIgnoreCase("xi")) {                     xincludeProcessing = option.equals("xi");                     continue;                 }                 if (option.equalsIgnoreCase("xb")) {                     xincludeFixupBaseURIs = option.equals("xb");                     continue;                 }                 if (option.equalsIgnoreCase("xl")) {                     xincludeFixupLanguage = option.equals("xl");                     continue;                 }                 if (option.equals("h")) {                     printUsage();                     continue;                 }             }             // use default parser?             if (parser == null) {                 // create parser                 try {                     parser = XMLReaderFactory.createXMLReader(DEFAULT_PARSER_NAME);                 }                 catch (Exception e) {                     System.err.println("error: Unable to instantiate parser ("+DEFAULT_PARSER_NAME+")");                     continue;                 }             }             // set parser features             try {                 parser.setFeature(NAMESPACES_FEATURE_ID, namespaces);             }             catch (SAXException e) {                 System.err.println("warning: Parser does not support feature ("+NAMESPACES_FEATURE_ID+")");             }             try {                 parser.setFeature(NAMESPACE_PREFIXES_FEATURE_ID, namespacePrefixes);             }             catch (SAXException e) {                 System.err.println("warning: Parser does not support feature ("+NAMESPACE_PREFIXES_FEATURE_ID+")");             }             try {                 parser.setFeature(VALIDATION_FEATURE_ID, validation);             }             catch (SAXException e) {                 System.err.println("warning: Parser does not support feature ("+VALIDATION_FEATURE_ID+")");             }             try {                 parser.setFeature(LOAD_EXTERNAL_DTD_FEATURE_ID, externalDTD);             }             catch (SAXNotRecognizedException e) {                 System.err.println("warning: Parser does not recognize feature ("+LOAD_EXTERNAL_DTD_FEATURE_ID+")");             }             catch (SAXNotSupportedException e) {                 System.err.println("warning: Parser does not support feature ("+LOAD_EXTERNAL_DTD_FEATURE_ID+")");             }             try {                 parser.setFeature(SCHEMA_VALIDATION_FEATURE_ID, schemaValidation);             }             catch (SAXNotRecognizedException e) {                 System.err.println("warning: Parser does not recognize feature ("+SCHEMA_VALIDATION_FEATURE_ID+")");             }             catch (SAXNotSupportedException e) {                 System.err.println("warning: Parser does not support feature ("+SCHEMA_VALIDATION_FEATURE_ID+")");             }             try {                 parser.setFeature(SCHEMA_FULL_CHECKING_FEATURE_ID, schemaFullChecking);             }             catch (SAXNotRecognizedException e) {                 System.err.println("warning: Parser does not recognize feature ("+SCHEMA_FULL_CHECKING_FEATURE_ID+")");             }             catch (SAXNotSupportedException e) {                 System.err.println("warning: Parser does not support feature ("+SCHEMA_FULL_CHECKING_FEATURE_ID+")");             }             try {                 parser.setFeature(HONOUR_ALL_SCHEMA_LOCATIONS_ID, honourAllSchemaLocations);             }             catch (SAXNotRecognizedException e) {                 System.err.println("warning: Parser does not recognize feature ("+HONOUR_ALL_SCHEMA_LOCATIONS_ID+")");             }             catch (SAXNotSupportedException e) {                 System.err.println("warning: Parser does not support feature ("+HONOUR_ALL_SCHEMA_LOCATIONS_ID+")");             }             try {                 parser.setFeature(VALIDATE_ANNOTATIONS_ID, validateAnnotations);             }             catch (SAXNotRecognizedException e) {                 System.err.println("warning: Parser does not recognize feature ("+VALIDATE_ANNOTATIONS_ID+")");             }             catch (SAXNotSupportedException e) {                 System.err.println("warning: Parser does not support feature ("+VALIDATE_ANNOTATIONS_ID+")");             }             try {                 parser.setFeature(DYNAMIC_VALIDATION_FEATURE_ID, dynamicValidation);             }             catch (SAXNotRecognizedException e) {                 System.err.println("warning: Parser does not recognize feature ("+DYNAMIC_VALIDATION_FEATURE_ID+")");             }             catch (SAXNotSupportedException e) {                 System.err.println("warning: Parser does not support feature ("+DYNAMIC_VALIDATION_FEATURE_ID+")");             }             try {                 parser.setFeature(XINCLUDE_FEATURE_ID, xincludeProcessing);             }             catch (SAXNotRecognizedException e) {                 System.err.println("warning: Parser does not recognize feature ("+XINCLUDE_FEATURE_ID+")");             }             catch (SAXNotSupportedException e) {                 System.err.println("warning: Parser does not support feature ("+XINCLUDE_FEATURE_ID+")");             }             try {                 parser.setFeature(XINCLUDE_FIXUP_BASE_URIS_FEATURE_ID, xincludeFixupBaseURIs);             }             catch (SAXNotRecognizedException e) {                 System.err.println("warning: Parser does not recognize feature ("+XINCLUDE_FIXUP_BASE_URIS_FEATURE_ID+")");             }             catch (SAXNotSupportedException e) {                 System.err.println("warning: Parser does not support feature ("+XINCLUDE_FIXUP_BASE_URIS_FEATURE_ID+")");             }             try {                 parser.setFeature(XINCLUDE_FIXUP_LANGUAGE_FEATURE_ID, xincludeFixupLanguage);             }             catch (SAXNotRecognizedException e) {                 System.err.println("warning: Parser does not recognize feature ("+XINCLUDE_FIXUP_LANGUAGE_FEATURE_ID+")");             }             catch (SAXNotSupportedException e) {                 System.err.println("warning: Parser does not support feature ("+XINCLUDE_FIXUP_LANGUAGE_FEATURE_ID+")");             }             // set handlers             parser.setDTDHandler(tracer);             parser.setErrorHandler(tracer);             if (parser instanceof XMLReader) {                 parser.setContentHandler(tracer);                 try {                     parser.setProperty("http://xml.org/sax/properties/declaration-handler", tracer);                 }                 catch (SAXException e) {                     e.printStackTrace(System.err);                 }                 try {                     parser.setProperty("http://xml.org/sax/properties/lexical-handler", tracer);                 }                 catch (SAXException e) {                     e.printStackTrace(System.err);                 }             }             else {                 ((Parser)parser).setDocumentHandler(tracer);             }             // parse file             try {                 parser.parse(arg);             }             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 sax.DocumentTracer (options) uri ...");         System.err.println();         System.err.println("options:");         System.err.println("  -p name     Select parser by name.");         System.err.println("  -n  | -N    Turn on/off namespace processing.");         System.err.println("  -np | -NP   Turn on/off namespace prefixes.");         System.err.println("              NOTE: Requires use of -n.");         System.err.println("  -v  | -V    Turn on/off validation.");         System.err.println("  -xd | -XD   Turn on/off loading of external DTDs.");         System.err.println("              NOTE: Always on when -v in use and not supported by all parsers.");         System.err.println("  -s  | -S    Turn on/off Schema validation support.");         System.err.println("              NOTE: Not supported by all parsers.");         System.err.println("  -f  | -F    Turn on/off Schema full checking.");         System.err.println("              NOTE: Requires use of -s and not supported by all parsers.");         System.err.println("  -hs | -HS   Turn on/off honouring of all schema locations.");         System.err.println("              NOTE: Requires use of -s and not supported by all parsers.");         System.err.println("  -va | -VA   Turn on/off validation of schema annotations.");         System.err.println("              NOTE: Requires use of -s and not supported by all parsers.");         System.err.println("  -dv | -DV   Turn on/off dynamic validation.");         System.err.println("              NOTE: Not supported by all parsers.");         System.err.println("  -xi | -XI   Turn on/off XInclude processing.");         System.err.println("              NOTE: Not supported by all parsers.");         System.err.println("  -xb | -XB   Turn on/off base URI fixup during XInclude processing.");         System.err.println("              NOTE: Requires use of -xi and not supported by all parsers.");         System.err.println("  -xl | -XL   Turn on/off language fixup during XInclude processing.");         System.err.println("              NOTE: Requires use of -xi and not supported by all parsers.");         System.err.println("  -h          This help screen.");         System.err.println();         System.err.println("defaults:");         System.err.println("  Parser:     "+DEFAULT_PARSER_NAME);         System.err.print("  Namespaces: ");         System.err.println(DEFAULT_NAMESPACES ? "on" : "off");         System.err.print("  Prefixes:   ");         System.err.println(DEFAULT_NAMESPACE_PREFIXES ? "on" : "off");         System.err.print("  Validation: ");         System.err.println(DEFAULT_VALIDATION ? "on" : "off");         System.err.print("  Load External DTD: ");         System.err.println(DEFAULT_LOAD_EXTERNAL_DTD ? "on" : "off");         System.err.print("  Schema:     ");         System.err.println(DEFAULT_SCHEMA_VALIDATION ? "on" : "off");         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("  Dynamic:    ");         System.err.println(DEFAULT_DYNAMIC_VALIDATION ? "on" : "off");         System.err.print("  XInclude:   ");         System.err.println(DEFAULT_XINCLUDE ? "on" : "off");         System.err.print("  XInclude base URI fixup:  ");         System.err.println(DEFAULT_XINCLUDE_FIXUP_BASE_URIS ? "on" : "off");         System.err.print("  XInclude language fixup:  ");         System.err.println(DEFAULT_XINCLUDE_FIXUP_LANGUAGE ? "on" : "off");     } // printUsage() } // class DocumentTracer