de.hunsicker.jalopy.language

Class JavaRecognizer

java.lang.Object

de.hunsicker.jalopy.language.Recognizer

de.hunsicker.jalopy.language.JavaRecognizer

public final class JavaRecognizer
extends Recognizer

The Java-specific recognizer.

Version:

$Revision: 1.7 $

Author:

Marco Hunsicker

Nested Class Summary

Nested classes/interfaces inherited from class de.hunsicker.jalopy.language.Recognizer

Recognizer.ParseException

Field Summary

Fields

Modifier and Type	Field and Description
static int	JDK_1_3 Indicates JDK version 1.3.
static int	JDK_1_4 Indicates JDK version 1.4.

Fields inherited from class de.hunsicker.jalopy.language.Recognizer

lexer, parser, UNKNOWN_FILE

Constructor Summary

Constructors

Constructor and Description
JavaRecognizer() Creates a new JavaRecognizer object.

Method Summary

Methods

Modifier and Type	Method and Description
void	attachAnnotations(java.util.List annotations) Attaches the given annotations to the current input source.
java.util.List	detachAnnotations() Detaches all annotations.
java.lang.String	getPackageName() Returns the package name of the parsed source file.
de.hunsicker.antlr.collections.AST	getParseTree() Returns the root node of the generated parse tree.
Position	getPosition() Returns the tracked position information.
boolean	hasAnnotations() Indicates whether the current tree contains annotations.
boolean	hasPosition() Determines whether the current tree contains a node that needs its position to be tracked.
void	parse(java.io.Reader in, java.lang.String filename) Parses the given stream.
void	setPosition(int line, int column) Sets a position in the given input source that should be tracked.

Methods inherited from class de.hunsicker.jalopy.language.Recognizer

getColumn, getFileFormat, getLexer, getLine, getParser, isFinished, isRunning, parse, parse, reset, setColumn, setLine

Methods inherited from class java.lang.Object

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

Field Detail

JDK_1_3

public static final int JDK_1_3

Indicates JDK version 1.3.

See Also:

Constant Field Values

JDK_1_4

public static final int JDK_1_4

Indicates JDK version 1.4.

See Also:

Constant Field Values

Constructor Detail

JavaRecognizer

public JavaRecognizer()

Creates a new JavaRecognizer object.

Method Detail

getPackageName

public java.lang.String getPackageName()

Returns the package name of the parsed source file.

Returns:

the package name of the parsed source file. Returns the empty String if the source file contains no package information.

Throws:

java.lang.IllegalStateException - if the parser is still running or wasn't started yet.

getParseTree

public de.hunsicker.antlr.collections.AST getParseTree()

Returns the root node of the generated parse tree. Note that every call to this method triggers the tree transformations, which could be quite expensive. So make sure to avoid unnecessary calls.

As we don't use checked exceptions to indicate runtime failures, one may check successful execution of the transformations prior to perform further processing:

 if (myJalopyInstance.getState() == Jalopy.State.ERROR)
 {
     // transformation failed, errors were already issued; perform
     // any custom error handling code you need
 }
 else
 {
     // perform further logic
 }
 

Overrides:

getParseTree in class Recognizer

Returns:

root node of the generated AST (of type <JavaNode>).

Throws:

java.lang.IllegalStateException - if the parser is still running or wasn't started yet.

See Also:

Jalopy.getState()

setPosition

public void setPosition(int line,
               int column)

Sets a position in the given input source that should be tracked.

Parameters:

line - a valid line number (>= 1).

column - a valid column offset (>= 1).

Throws:

java.lang.IllegalArgumentException - if either line or column < 1

Since:

1.0b9

getPosition

public Position getPosition()

Returns the tracked position information.

Returns:

the tracked position or null if no position should have been tracked.

Since:

1.0b9

attachAnnotations

public void attachAnnotations(java.util.List annotations)

Attaches the given annotations to the current input source. All annotations will be associated with the parse tree node that matches their locations.

Parameters:

annotations - list with annotations (of type <Annotation>).

Since:

1.0b9

See Also:

Annotation, detachAnnotations()

detachAnnotations

public java.util.List detachAnnotations()

Detaches all annotations.

Returns:

list with annotations (of type <Annotation>). Returns an empty list in case no annotations were attached for the input source.

Since:

1.0b9

See Also:

attachAnnotations(java.util.List)

hasAnnotations

public boolean hasAnnotations()

Indicates whether the current tree contains annotations.

Returns:

true if the tree contains annotations.

Since:

1.0b9

hasPosition

public boolean hasPosition()

Determines whether the current tree contains a node that needs its position to be tracked.

Returns:

true if the tree contains a node that needs its position to be tracked.

Since:

1.0b9

parse

public void parse(java.io.Reader in,
         java.lang.String filename)

Parses the given stream.

Overrides:

parse in class Recognizer

Parameters:

in - stream we read from.

filename - name of the file we parse.