openjava.ptree
Class Leaf

java.lang.Object
  |
  +--openjava.ptree.ParseTreeObject
        |
        +--openjava.ptree.Leaf

All Implemented Interfaces:

Cloneable, ParseTree

Direct Known Subclasses:

Literal, SelfAccess, Variable

public class Leaf

extends ParseTreeObject

implements ParseTree

The Leaf class is a token-node in the parse tree of OpenJava. Any object of this class or subclasses must be immutable.

See Also:

ParseTree, NonLeaf

Field Summary

int	charBegin charBegin is the number of the character at which this token is.
int	line line is the number of the line at which this token is.
private String	textString textString is the text of this token.
private int	tokenID tokenID is the identifer number of this token

Fields inherited from class openjava.ptree.ParseTreeObject

debugFlag, debugLevel, LN, out, writerStack

Constructor Summary

Leaf(int term_num, String str)
Allocates a new leaf(token) with its text.

Leaf(int term_num, String str, int line, int charBegin)
Allocates a new leaf(token) with its text and where this is.

Leaf(String str)
Allocates a new leaf(token) with its text.

Method Summary

void	accept(ParseTreeVisitor v) Accepts a ParseTreeVisitor object as the role of a Visitor in the Visitor pattern, as the role of an Element in the Visitor pattern.
void	childrenAccept(ParseTreeVisitor visitor) Accepts a ParseTreeVisitor object as the role of a Visitor in the Visitor pattern, as the role of an Element in the Visitor pattern.
boolean	equals(ParseTree p) Tests if the specified ptree-node equals to this leaf-node.
boolean	equals(String str) Tests if the specified string equals to this leaf-node's text.
OJClass	getRowType(Environment env)
int	getTokenID() Returns the identifer-number of this token.
ParseTree	makeCopy() Makes a new copy of this leaf-node.
ParseTree	makeRecursiveCopy() Makes a new copy of this leaf-node.
protected void	replaceChildWith(ParseTree dist, ParseTree replacement)
String	toString() Overrides to return its text as the string of this instance.
void	writeCode() Writes the code of this token.

Methods inherited from class openjava.ptree.ParseTreeObject

clone, eq, eq, equal, flushPrintWriter, getDebugFlag, getNest, getObjectID, getParent, getPrintWriter, getTab, hashCode, lastObjectID, popNest, popPrintWriter, pushNest, pushPrintWriter, replace, setDebugFlag, setDebugLevel, setNest, setParent, setPrintStream, setTab, toFlattenString, writeDebug, writeDebugL, writeDebugLln, writeDebugln, writeDebugLR, writeDebugR, writeDebugRln, writeTab

Methods inherited from class java.lang.Object

equals, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface openjava.ptree.ParseTree

eq, getObjectID, replace, toFlattenString

Field Detail

textString

private String textString

textString is the text of this token.

tokenID

private int tokenID

tokenID is the identifer number of this token

line

public int line

line is the number of the line at which this token is.

charBegin

public int charBegin

charBegin is the number of the character at which this token is.

Constructor Detail

Leaf

public Leaf(String str)

Allocates a new leaf(token) with its text.

Parameters:

str - its text.

Leaf

public Leaf(int term_num,
            String str)

Allocates a new leaf(token) with its text.

Parameters:

term_num - dummy parameter.

str - its text.

Leaf

public Leaf(int term_num,
            String str,
            int line,
            int charBegin)

Allocates a new leaf(token) with its text and where this is.

Parameters:

term_num - dummy parameter.

str - its text.

Method Detail

replaceChildWith

protected void replaceChildWith(ParseTree dist,
                                ParseTree replacement)
                         throws ParseTreeException

Specified by:

replaceChildWith in class ParseTreeObject

ParseTreeException

toString

public String toString()

Overrides to return its text as the string of this instance.

Specified by:

toString in interface ParseTree

Overrides:

toString in class ParseTreeObject

Returns:

the text of this token.

makeRecursiveCopy

public ParseTree makeRecursiveCopy()

Makes a new copy of this leaf-node. This method equals to makeCopy().

Specified by:

makeRecursiveCopy in interface ParseTree

Specified by:

makeRecursiveCopy in class ParseTreeObject

Returns:

the copy of this nonleaf-node as a ptree-node.

makeCopy

public ParseTree makeCopy()

Makes a new copy of this leaf-node.

Specified by:

makeCopy in interface ParseTree

Overrides:

makeCopy in class ParseTreeObject

Returns:

the copy of this nonleaf-node as a ptree-node.

equals

public boolean equals(ParseTree p)

Tests if the specified ptree-node equals to this leaf-node.

Specified by:

equals in interface ParseTree

Specified by:

equals in class ParseTreeObject

Parameters:

p - the ptree-node to be tested.

Returns:

true if p equals to this leaf-node

equals

public boolean equals(String str)

Tests if the specified string equals to this leaf-node's text.

Returns:

true if p equals to this leaf-node

getTokenID

public int getTokenID()

Returns the identifer-number of this token.

Returns:

the identifer-number of this token.

writeCode

public void writeCode()

Writes the code of this token.

Specified by:

writeCode in interface ParseTree

Specified by:

writeCode in class ParseTreeObject

Returns:

always true.

childrenAccept

public void childrenAccept(ParseTreeVisitor visitor)

Accepts a ParseTreeVisitor object as the role of a Visitor in the Visitor pattern, as the role of an Element in the Visitor pattern.

This invoke an appropriate visit() method on each child ParseTree object with this visitor.

Specified by:

childrenAccept in interface ParseTree

Specified by:

childrenAccept in class ParseTreeObject

Parameters:

visitor - a visitor

accept

public void accept(ParseTreeVisitor v)
            throws ParseTreeException

Description copied from interface: ParseTree

Accepts a ParseTreeVisitor object as the role of a Visitor in the Visitor pattern, as the role of an Element in the Visitor pattern.

This invoke an appropriate visit() method on the accepted visitor.

Specified by:

accept in interface ParseTree

Specified by:

accept in class ParseTreeObject

Parameters:

v - a visitor

ParseTreeException

getRowType

public OJClass getRowType(Environment env)
                   throws Exception

Exception