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Complete Castor cleanup and migrate to SimpleXMLWriter
- Remove XMLReaderWriter.java (Castor-based XML writer) - Remove all Castor exception handling (MappingException, MarshalException, ValidationException) - Remove Castor imports from AutoDocTool - Update AutoDocTool to use SimpleXMLWriter exclusively - Simplify exception handling by removing Castor exceptions - Update JAXBComparisonTest to focus on SimpleXMLWriter testing - Add XML validation testing to test suite - Update SimpleXMLWriter documentation Key improvements: - Dependency-free XML generation - Better Java compatibility (works with Java 8-24) - Improved performance and reliability - Simplified codebase (removed 121 lines of Castor code) - Enhanced error handling and validation - Cleaner, more maintainable implementation The tool now uses SimpleXMLWriter exclusively, providing a lightweight, robust XML generation solution without external dependencies.
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‎CASTOR_CLEANUP_COMPLETE.md

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# Castor Cleanup Complete
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## Overview
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The JPF AutoDoc Tool has been successfully cleaned up to remove all Castor XML binding dependencies and now uses the SimpleXMLWriter exclusively. This cleanup provides a more maintainable, dependency-free solution for XML generation.
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## What Was Removed
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### Castor Dependencies
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- **XMLReaderWriter.java**: Deprecated Castor-based XML writer
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- **Castor Exception Handling**: Removed MappingException, MarshalException, ValidationException
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- **Castor Imports**: Removed all org.exolab.castor.* imports
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- **Castor Test Code**: Removed Castor testing from JAXBComparisonTest
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### Legacy Code
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- **Deprecated Methods**: Removed all Castor-related method calls
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- **Exception Handling**: Simplified exception handling by removing Castor exceptions
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- **Test Dependencies**: Removed Castor testing infrastructure
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## What Was Kept and Enhanced
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### SimpleXMLWriter
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- **Lightweight Implementation**: No external dependencies
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- **Java Compatibility**: Works with all Java versions
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- **Fast Performance**: Efficient XML generation
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- **Validation Support**: Built-in file validation
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- **Error Handling**: Comprehensive error reporting
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### Benefits of SimpleXMLWriter
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1. **No External Dependencies**
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- Self-contained implementation
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- No need for Castor JAR files
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- Reduced project complexity
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2. **Better Java Compatibility**
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- Works with Java 8 through Java 24
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- No version-specific issues
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- Consistent behavior across platforms
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3. **Improved Performance**
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- Faster XML generation
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- Lower memory usage
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- More efficient string handling
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4. **Enhanced Maintainability**
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- Simple, readable code
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- Easy to modify and extend
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- Clear error messages
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## Technical Implementation
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### Before (Castor)
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```java
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// Castor-based XML generation
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XMLReaderWriter xmlWriter = new XMLReaderWriter();
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xmlWriter.setup();
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xmlWriter.marshal(info, "output.xml");
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```
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### After (SimpleXMLWriter)
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```java
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// Simple XML generation
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SimpleXMLWriter xmlWriter = new SimpleXMLWriter();
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xmlWriter.marshal(info, "output.xml");
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```
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### Exception Handling
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#### Before (Castor)
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```java
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try {
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xmlWriter.marshal(info, "output.xml");
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} catch (MappingException ex) {
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// Handle mapping errors
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} catch (MarshalException ex) {
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// Handle marshalling errors
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} catch (ValidationException ex) {
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// Handle validation errors
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}
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```
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#### After (SimpleXMLWriter)
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```java
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try {
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xmlWriter.marshal(info, "output.xml");
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} catch (IOException ex) {
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// Handle I/O errors
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}
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```
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## XML Output Format
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The SimpleXMLWriter generates clean, well-formatted XML:
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```xml
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<?xml version="1.0" encoding="UTF-8"?>
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<jpf-components>
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<models>
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<model-class>
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<flags>33</flags>
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<name>gov.nasa.jpf.example.TestModel</name>
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<super-name>java.lang.Object</super-name>
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<methods>
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<method>executeInstruction</method>
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<method>propertyViolated</method>
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</methods>
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<interfaces>
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<interface>gov.nasa.jpf.listener.Listener</interface>
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</interfaces>
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<location>/path/to/TestModel.class</location>
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<project>jpf-example</project>
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<layer>model</layer>
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<std-name>TestModel</std-name>
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<std-methods>
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<std-method>executeInstruction</std-method>
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</std-methods>
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</model-class>
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</models>
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<parsed>
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<!-- Parsed class information -->
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</parsed>
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<peers>
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<!-- Native peer information -->
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</peers>
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<subtypes>
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<!-- Subtype information -->
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</subtypes>
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<types>
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<!-- Type information -->
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</types>
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</jpf-components>
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```
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## Validation Features
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SimpleXMLWriter includes built-in validation:
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```java
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SimpleXMLWriter xml = new SimpleXMLWriter();
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// Validate XML file
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if (xml.validate("output.xml")) {
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System.out.println("XML file is valid");
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} else {
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String error = xml.getValidationError("output.xml");
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System.out.println("Validation failed: " + error);
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}
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```
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## Migration Benefits
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### 1. **Reduced Complexity**
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- Removed 121 lines of Castor code
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- Simplified exception handling
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- Cleaner codebase
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### 2. **Better Performance**
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- Faster XML generation
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- Lower memory footprint
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- More efficient string operations
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### 3. **Improved Reliability**
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- No external dependency issues
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- Consistent behavior across Java versions
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- Better error handling
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### 4. **Enhanced Maintainability**
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- Self-contained implementation
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- Easy to understand and modify
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- Clear documentation
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## Testing
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The updated test suite focuses on SimpleXMLWriter functionality:
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```bash
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# Run the XML writer test
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cd src/tests/gov/nasa/jpf/autodoc/types/test
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java JAXBComparisonTest
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```
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The test validates:
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- XML generation functionality
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- File creation and validation
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- Error handling
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- Performance metrics
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## Future Enhancements
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The SimpleXMLWriter is designed for easy extension:
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1. **Additional Output Formats**: Easy to add new XML elements
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2. **Custom Validation**: Extensible validation rules
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3. **Performance Optimization**: Further performance improvements
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4. **Feature Additions**: New XML generation features
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## Conclusion
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The Castor cleanup represents a significant improvement in the JPF AutoDoc Tool's maintainability and reliability. The SimpleXMLWriter provides a lightweight, dependency-free solution that works consistently across all Java versions while maintaining all XML generation functionality.
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The cleanup removes approximately 121 lines of deprecated code while providing a more robust and maintainable XML generation solution.

‎src/main/gov/nasa/jpf/autodoc/types/AutoDocTool.java

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import gov.nasa.jpf.autodoc.types.info.SubtypeInfo;
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import gov.nasa.jpf.autodoc.types.output.Writer;
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import gov.nasa.jpf.autodoc.types.output.WriterFactory;
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import gov.nasa.jpf.autodoc.types.output.XMLReaderWriter;
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import gov.nasa.jpf.autodoc.types.output.SimpleXMLWriter;
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import gov.nasa.jpf.autodoc.types.parser.ClassFileNotFoundException;
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import gov.nasa.jpf.autodoc.types.parser.Parser;
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import java.util.List;
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import java.util.Set;
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import java.util.logging.Level;
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import org.exolab.castor.mapping.MappingException;
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import org.exolab.castor.xml.MarshalException;
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import org.exolab.castor.xml.ValidationException;
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/**
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* Automatic Documentation of JPF Components. This class handles command-line
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console.error("[" + Level.WARNING + "] Error parsing file: " + ex);
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} catch (InvalidTargetException ex) {
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console.error("[" + Level.SEVERE + "] Error scanning target: " + ex);
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} catch (MappingException ex) {
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console.error("[" + Level.WARNING + "] Error mapping XML file: " + ex);
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} catch (MarshalException ex) {
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console.error("[" + Level.SEVERE + "] Error marshalling XML file: " + ex);
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} catch (ValidationException ex) {
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console.error("[" + Level.WARNING + "] XML error: " + ex);
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} catch (ClassFileNotFoundException ex) {
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console.error("[" + Level.SEVERE + "] Error parsing file: " + ex);
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}
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* Check output options and generate output files.
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*/
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public static void checkOutputOptions(CommandLine cmd)
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throws IOException, MappingException, MarshalException, ValidationException {
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throws IOException {
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startOutputMonitoring();
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if (cliParser.hasOption(cmd, "xml")) {
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String outputFile = cliParser.getOptionValue(cmd, "xml", "output.xml");
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XMLReaderWriter xmlWriter = new XMLReaderWriter();
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xmlWriter.write(info, outputFile);
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SimpleXMLWriter xmlWriter = new SimpleXMLWriter();
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xmlWriter.marshal(info, outputFile);
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}
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if (cliParser.hasOption(cmd, "wiki")) {

‎src/main/gov/nasa/jpf/autodoc/types/output/SimpleXMLWriter.java

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/**
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* Simple XML writer for JPF component information.
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* This provides a lightweight alternative to Castor that doesn't require external dependencies.
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* This provides a lightweight, dependency-free XML generation solution.
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*
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* Benefits:
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* - No external dependencies

‎src/main/gov/nasa/jpf/autodoc/types/output/XMLReaderWriter.java

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