Convert grammars to use StringBuilder as well

hibernate-core/src/main/antlr/hql-sql.g

@@ -478,7 +478,7 @@ path returns [String p] {
 	}
 	: a:identifier { p = a.getText(); }
 	| #(DOT x=path y:identifier) {
-			StringBuffer buf = new StringBuffer();
+			StringBuilder buf = new StringBuilder();
 			buf.append(x).append(".").append(y.getText());
 			p = buf.toString();
 		}

hibernate-core/src/main/antlr/order-by-render.g

@@ -40,7 +40,7 @@ options {
 
 {
     // the buffer to which we write the resulting SQL.
-	private StringBuffer buffer = new StringBuffer();
+	private StringBuilder buffer = new StringBuilder();
 
 	protected void out(String text) {
 	    buffer.append( text );

hibernate-core/src/main/antlr/order-by.g

@@ -229,7 +229,7 @@ functionCall! { trace("functionCall"); }
  */
 functionName {
         trace("functionName");
-        StringBuffer buffer = new StringBuffer();
+        StringBuilder buffer = new StringBuilder();
     }
     : i:IDENT { buffer.append( i.getText() ); }
             ( DOT i2:IDENT { buffer.append( '.').append( i2.getText() ); } )* {
@@ -295,7 +295,7 @@ orderingSpecification! { trace("orderingSpecification"); }
  */
 simplePropertyPath {
         trace("simplePropertyPath");
-        StringBuffer buffer = new StringBuffer();
+        StringBuilder buffer = new StringBuilder();
     }
     : i:IDENT { buffer.append( i.getText() ); }
             ( DOT i2:IDENT { buffer.append( '.').append( i2.getText() ); } )+ {

hibernate-core/src/main/antlr/sql-gen.g

@@ -25,7 +25,7 @@ options {
 {
 
    /** the buffer resulting SQL statement is written to */
-	private StringBuffer buf = new StringBuffer();
+	private StringBuilder buf = new StringBuilder();
 
 	protected void out(String s) {
 		buf.append(s);
@@ -71,7 +71,7 @@ options {
 		// moved this impl into the subclass...
 	}
 
-	protected StringBuffer getStringBuffer() {
+	protected StringBuilder getStringBuilder() {
 		return buf;
 	}
 

hibernate-core/src/main/antlr/sql-stmt.g

@@ -95,7 +95,7 @@ options {
         }
 
         public String getErrorMessage() {
-            StringBuffer buf = new StringBuffer();
+            StringBuilder buf = new StringBuilder();
             for ( Iterator iterator = errorList.iterator(); iterator.hasNext(); ) {
                 buf.append( (String) iterator.next() );
                 if ( iterator.hasNext() ) {

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

@@ -167,7 +167,7 @@ public class SqlGenerator extends SqlGeneratorBase implements ErrorReporter {
 	}
 
 	public String getSQL() {
-		return getStringBuffer().toString();
+		return getStringBuilder().toString();
 	}
 
 	@Override
@@ -269,11 +269,11 @@ public class SqlGenerator extends SqlGeneratorBase implements ErrorReporter {
 	 */
 	class DefaultWriter implements SqlWriter {
 		public void clause(String clause) {
-			getStringBuffer().append( clause );
+			getStringBuilder().append( clause );
 		}
 
 		public void commaBetweenParameters(String comma) {
-			getStringBuffer().append( comma );
+			getStringBuilder().append( comma );
 		}
 	}