HHH-8159 - Apply fixups indicated by analysis tools

hibernate-core/src/main/java/org/hibernate/QueryException.java

@@ -102,19 +102,38 @@ public class QueryException extends HibernateException {
 	}
 
 	/**
+	 * Wraps this exception with another, of same kind, with the specified queryString.  If this exception already
+	 * has a queryString defined, the same exception ({@code this}) is returned.  Otherwise the protected
+	 * {@link #generateQueryException(String)} is called, to allow subclasses to properly create the correct
+	 * subclass for return.
 	 *
-	 * @param queryString
-	 * @return
+	 * @param queryString The query string that led to the QueryException
+	 *
+	 * @return {@code this}, if {@code this} has {@code null} for {@link #getQueryString()}; otherwise a new
+	 * QueryException (or subclass) is returned.
 	 */
 	public final QueryException wrapWithQueryString(String queryString) {
 		if ( this.getQueryString() != null ) {
 			return this;
 		}
 
-		return doWrapWithQueryString( queryString );
+		return generateQueryException( queryString );
 	}
 
-	protected QueryException doWrapWithQueryString(String queryString) {
+	/**
+	 * Called from {@link #wrapWithQueryString(String)} when we really need to generate a new QueryException
+	 * (or subclass).
+	 * <p/>
+	 * NOTE : implementors should take care to use {@link #getOriginalMessage()} for the message, not
+	 * {@link #getMessage()}
+	 *
+	 * @param queryString The query string
+	 *
+	 * @return The generated QueryException (or subclass)
+	 *
+	 * @see #getOriginalMessage()
+	 */
+	protected QueryException generateQueryException(String queryString) {
 		return new QueryException( getOriginalMessage(), queryString, this );
 	}
 }

hibernate-core/src/main/java/org/hibernate/QueryParameterException.java

@@ -50,7 +50,7 @@ public class QueryParameterException extends QueryException {
 	}
 
 	@Override
-	protected QueryException doWrapWithQueryString(String queryString) {
+	protected QueryException generateQueryException(String queryString) {
 		return new QueryParameterException( super.getOriginalMessage(), queryString, this );
 	}
 }

hibernate-core/src/main/java/org/hibernate/hql/internal/ast/ErrorCounter.java

@@ -37,48 +37,77 @@ import org.hibernate.internal.CoreMessageLogger;
  * An error handler that counts parsing errors and warnings.
  */
 public class ErrorCounter implements ParseErrorHandler {
+	private static final CoreMessageLogger LOG = Logger.getMessageLogger(
+			CoreMessageLogger.class,
+			ErrorCounter.class.getName()
+	);
 
-    private static final CoreMessageLogger LOG = Logger.getMessageLogger(CoreMessageLogger.class, ErrorCounter.class.getName());
+	private final String hql;
 
 	private List<String> errorList = new ArrayList<String>();
-	private List<String> warningList = new ArrayList<String>();
 	private List<RecognitionException> recognitionExceptions = new ArrayList<RecognitionException>();
 
+	/**
+	 * Constructs an ErrorCounter without knowledge of the HQL, meaning that generated QueryException
+	 * instances *will not* contain the HQL (and will need to be wrapped at a higher level in another
+	 * QueryException).
+	 */
+	public ErrorCounter() {
+		this( null );
+	}
+
+	/**
+	 * Constructs an ErrorCounter with knowledge of the HQL, meaning that generated QueryException
+	 * instances *will* contain the HQL.
+	 */
+	public ErrorCounter(String hql) {
+		this.hql = hql;
+	}
+
+	@Override
 	public void reportError(RecognitionException e) {
 		reportError( e.toString() );
 		recognitionExceptions.add( e );
-        LOG.error(e.toString(), e);
+		LOG.error( e.toString(), e );
 	}
 
+	@Override
 	public void reportError(String message) {
-        LOG.error(message);
+		LOG.error( message );
 		errorList.add( message );
 	}
 
+	@Override
 	public int getErrorCount() {
 		return errorList.size();
 	}
 
+	@Override
 	public void reportWarning(String message) {
-		LOG.debug(message);
-		warningList.add( message );
+		LOG.debug( message );
 	}
 
 	private String getErrorString() {
-		StringBuilder buf = new StringBuilder();
-		for ( Iterator<String> iterator = errorList.iterator(); iterator.hasNext(); ) {
+		final StringBuilder buf = new StringBuilder();
+		final Iterator<String> iterator = errorList.iterator();
+		while ( iterator.hasNext() ) {
 			buf.append( iterator.next() );
-			if ( iterator.hasNext() ) buf.append( "\n" );
+			if ( iterator.hasNext() ) {
+				buf.append( "\n" );
+			}
 
 		}
 		return buf.toString();
 	}
 
+	@Override
 	public void throwQueryException() throws QueryException {
 		if ( getErrorCount() > 0 ) {
-            if (recognitionExceptions.size() > 0) throw QuerySyntaxException.convert(recognitionExceptions.get(0));
-            throw new QueryException(getErrorString());
+		if ( recognitionExceptions.size() > 0 ) {
+				throw QuerySyntaxException.convert( recognitionExceptions.get( 0 ), hql );
 		}
-		LOG.debug("throwQueryException() : no errors");
+			throw new QueryException( getErrorString(), hql );
+		}
+		LOG.debug( "throwQueryException() : no errors" );
 	}
 }

hibernate-core/src/main/java/org/hibernate/hql/internal/ast/HqlParser.java

@@ -52,25 +52,35 @@ import org.hibernate.internal.util.StringHelper;
  * @author Joshua Davis (pgmjsd@sourceforge.net)
  */
 public final class HqlParser extends HqlBaseParser {
+	private static final CoreMessageLogger LOG = Logger.getMessageLogger(
+			CoreMessageLogger.class,
+			HqlParser.class.getName()
+	);
 
-    private static final CoreMessageLogger LOG = Logger.getMessageLogger(CoreMessageLogger.class, HqlParser.class.getName());
-
-	private ParseErrorHandler parseErrorHandler;
-	private ASTPrinter printer = getASTPrinter();
+	private final ParseErrorHandler parseErrorHandler;
+	private final ASTPrinter printer = getASTPrinter();
 
 	private static ASTPrinter getASTPrinter() {
 		return new ASTPrinter( org.hibernate.hql.internal.antlr.HqlTokenTypes.class );
 	}
 
+	/**
+	 * Get a HqlParser instance for the given HQL string.
+	 *
+	 * @param hql The HQL query string
+	 *
+	 * @return The parser.
+	 */
 	public static HqlParser getInstance(String hql) {
-        // [jsd] The fix for HHH-558...
-        HqlLexer lexer = new HqlLexer( new StringReader( hql ) );
-		return new HqlParser( lexer );
+		return new HqlParser( hql );
 	}
 
-	private HqlParser(TokenStream lexer) {
-		super( lexer );
-		initialize();
+	private HqlParser(String hql) {
+		// The fix for HHH-558...
+		super( new HqlLexer( new StringReader( hql ) ) );
+		parseErrorHandler = new ErrorCounter( hql );
+		// Create nodes that track line and column number.
+		setASTFactory( new HqlASTFactory() );
 	}
 
 
@@ -326,12 +336,6 @@ public final class HqlParser extends HqlBaseParser {
 		printer.showAst( ast, pw );
 	}
 
-	private void initialize() {
-		// Initialize the error handling delegate.
-		parseErrorHandler = new ErrorCounter();
-		setASTFactory(new HqlASTFactory());	// Create nodes that track line and column number.
-	}
-
 	@Override
     public void weakKeywords() throws TokenStreamException {
 

hibernate-core/src/main/java/org/hibernate/hql/internal/ast/HqlSqlWalker.java

@@ -170,7 +170,7 @@ public class HqlSqlWalker extends HqlSqlBaseWalker implements ErrorReporter, Par
 			String collectionRole) {
 		setASTFactory( new SqlASTFactory( this ) );
 		// Initialize the error handling delegate.
-		this.parseErrorHandler = new ErrorCounter();
+		this.parseErrorHandler = new ErrorCounter( qti.getQueryString() );
 		this.queryTranslatorImpl = qti;
 		this.sessionFactoryHelper = new SessionFactoryHelper( sfi );
 		this.literalProcessor = new LiteralProcessor( this );

hibernate-core/src/main/java/org/hibernate/hql/internal/ast/QuerySyntaxException.java

@@ -1,10 +1,10 @@
 /*
  * Hibernate, Relational Persistence for Idiomatic Java
  *
- * Copyright (c) 2008, Red Hat Middleware LLC or third-party contributors as
+ * Copyright (c) 2008, 2013, Red Hat Inc. or third-party contributors as
  * indicated by the @author tags or express copyright attribution
  * statements applied by the authors.  All third-party contributions are
- * distributed under license by Red Hat Middleware LLC.
+ * distributed under license by Red Hat Inc.
  *
  * This copyrighted material is made available to anyone wishing to use, modify,
  * copy, or redistribute it subject to the terms and conditions of the GNU
@@ -20,7 +20,6 @@
  * Free Software Foundation, Inc.
  * 51 Franklin Street, Fifth Floor
  * Boston, MA  02110-1301  USA
- *
  */
 package org.hibernate.hql.internal.ast;
 import antlr.RecognitionException;
@@ -33,23 +32,57 @@ import org.hibernate.QueryException;
  * @author josh
  */
 public class QuerySyntaxException extends QueryException {
-
+	/**
+	 * Constructs a QuerySyntaxException
+	 *
+	 * @param message Message explaining the condition that led to the exception
+	 */
 	public QuerySyntaxException(String message) {
 		super( message );
 	}
 
+	/**
+	 * Constructs a QuerySyntaxException
+	 *
+	 * @param message Message explaining the condition that led to the exception
+	 * @param hql The hql query that was being parsed/analyzed
+	 */
 	public QuerySyntaxException(String message, String hql) {
 		super( message, hql );
 	}
 
+	/**
+	 * Intended for use solely from {@link #generateQueryException(String)}
+	 *
+	 * @param message Message explaining the condition that led to the exception
+	 * @param queryString The hql query that was being parsed/analyzed
+	 * @param cause The cause, generally another QuerySyntaxException
+	 */
 	protected QuerySyntaxException(String message, String queryString, Exception cause) {
 		super( message, queryString, cause );
 	}
 
+	/**
+	 * Converts the given ANTLR RecognitionException into a QuerySyntaxException.  The RecognitionException
+	 * does not become the cause because ANTLR exceptions are not serializable.
+	 *
+	 * @param e The ANTLR exception
+	 *
+	 * @return The QuerySyntaxException
+	 */
 	public static QuerySyntaxException convert(RecognitionException e) {
 		return convert( e, null );
 	}
 
+	/**
+	 * Converts the given ANTLR RecognitionException into a QuerySyntaxException.  The RecognitionException
+	 * does not become the cause because ANTLR exceptions are not serializable.
+	 *
+	 * @param e The ANTLR exception
+	 * @param hql The query string
+	 *
+	 * @return The QuerySyntaxException
+	 */
 	public static QuerySyntaxException convert(RecognitionException e, String hql) {
 		String positionInfo = e.getLine() > 0 && e.getColumn() > 0
 				? " near line " + e.getLine() + ", column " + e.getColumn()
@@ -58,7 +91,7 @@ public class QuerySyntaxException extends QueryException {
 	}
 
 	@Override
-	protected QueryException doWrapWithQueryString(String queryString) {
+	protected QueryException generateQueryException(String queryString) {
 		return new QuerySyntaxException( getOriginalMessage(), queryString, this );
 	}
 }