org.hibernate.hql.internal.ast.util

Class ASTPrinter

java.lang.Object

org.hibernate.hql.internal.ast.util.ASTPrinter

public class ASTPrinter
extends Object

Utility for generating pretty "ASCII art" representations of syntax trees. This class is threadsafe: reuse instances as needed.

Author:

Joshua Davis, Steve Ebersole

Method Summary

Modifier and Type	Method and Description
static void	appendEscapedMultibyteChars(String text, StringBuilder buf)
static String	escapeMultibyteChars(String text)
String	getTokenTypeName(int type) Returns the token type name for the given token type.
String	nodeToString(antlr.collections.AST ast)
String	showAsString(antlr.collections.AST ast, String header) Renders the AST into 'ASCII art' form and returns that string representation.
void	showAst(antlr.collections.AST ast, PrintStream out) Prints the AST in 'ASCII art' form to the specified print stream.
void	showAst(antlr.collections.AST ast, PrintWriter pw) Prints the AST in 'ASCII art' tree form to the specified print writer.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

showAsString

public String showAsString(antlr.collections.AST ast,
                           String header)

Renders the AST into 'ASCII art' form and returns that string representation.

Parameters:

ast - The AST to display.

header - The header for the display.

Returns:

The AST in 'ASCII art' form, as a string.

showAst

public void showAst(antlr.collections.AST ast,
                    PrintStream out)

Prints the AST in 'ASCII art' form to the specified print stream.

Parameters:

ast - The AST to print.

out - The print stream to which the AST should be printed.

showAst

public void showAst(antlr.collections.AST ast,
                    PrintWriter pw)

Prints the AST in 'ASCII art' tree form to the specified print writer.

Parameters:

ast - The AST to print.

pw - The print writer to which the AST should be written.

getTokenTypeName

public String getTokenTypeName(int type)

Returns the token type name for the given token type.

Parameters:

type - The token type.

Returns:

String - The token type name from the token type constant class, or just the integer as a string if none exists.

nodeToString

public String nodeToString(antlr.collections.AST ast)

appendEscapedMultibyteChars

public static void appendEscapedMultibyteChars(String text,
                                               StringBuilder buf)

escapeMultibyteChars

public static String escapeMultibyteChars(String text)