Language Module

/**
 * Main entry point for the Apex language module
 * Singleton class that provides PMD integration
 */
public class ApexLanguageModule {
    /** Get singleton instance of the language module */
    public static ApexLanguageModule getInstance();
    
    /** Create language processor for batch processing */
    public ApexLanguageProcessor createProcessor(LanguagePropertyBundle bundle);
    
    /** Create new property bundle with language-specific properties */
    public LanguagePropertyBundle newPropertyBundle();
    
    /** Create CPD lexer for copy-paste detection */
    public Lexer createCpdLexer(LanguagePropertyBundle bundle);
}

/**
 * Language processor for batch processing of Apex files
 */
public class ApexLanguageProcessor {
    /** Get language version handler for parsing and analysis */
    public LanguageVersionHandler services();
    
    /** Get multifile analysis state for cross-file analysis */
    public ApexMultifileAnalysis getMultiFileState();
}

/**
 * Language-specific properties and configuration
 */
public class ApexLanguageProperties {
    /** Property for specifying Salesforce metadata root directory for multifile analysis */
    public static final PropertyDescriptor<String> MULTIFILE_DIRECTORY;
}

/**
 * Handles @SuppressWarnings annotation processing
 */
public class ApexViolationSuppressors {
    /** List of all Apex violation suppressors */
    public static final List<ViolationSuppressor> ALL_APEX_SUPPRESSORS;
}

// Register Apex language module
ApexLanguageModule apexModule = ApexLanguageModule.getInstance();

// Create language processor with properties
LanguagePropertyBundle properties = apexModule.newPropertyBundle();
properties.setProperty(ApexLanguageProperties.MULTIFILE_DIRECTORY, "/path/to/salesforce/metadata");
ApexLanguageProcessor processor = apexModule.createProcessor(properties);

// Get language services
LanguageVersionHandler handler = processor.services();

// Access multifile analysis
ApexMultifileAnalysis multifileAnalysis = processor.getMultiFileState();
if (!multifileAnalysis.isFailed()) {
    List<Issue> issues = multifileAnalysis.getFileIssues("MyClass.cls");
    for (Issue issue : issues) {
        System.out.println("Issue: " + issue.getMessage());
    }
}

// Create CPD lexer for duplicate detection
Lexer cpdLexer = apexModule.createCpdLexer(properties);