bsh
Class LHS

java.lang.Object
  bsh.LHS

All Implemented Interfaces:

ParserConstants, java.io.Serializable

class LHS

extends java.lang.Object

implements ParserConstants, java.io.Serializable

An LHS is a wrapper for an variable, field, or property. It ordinarily holds the "left hand side" of an assignment and may be either resolved to a value or assigned a value.

There is one special case here termed METHOD_EVAL where the LHS is used in an intermediate evaluation of a chain of suffixes and wraps a method invocation. In this case it may only be resolved to a value and cannot be assigned. (You can't assign a value to the result of a method call e.g. "foo() = 5;").

Field Summary

(package private) java.lang.reflect.Field	field
(package private) static int	FIELD Identifiers for the various types of LHS.
(package private) int	index
(package private) static int	INDEX Identifiers for the various types of LHS.
(package private) boolean	localVar The assignment should be to a local variable
(package private) static int	METHOD_EVAL Identifiers for the various types of LHS.
(package private) NameSpace	nameSpace
(package private) java.lang.Object	object
(package private) static int	PROPERTY Identifiers for the various types of LHS.
(package private) java.lang.String	propName
(package private) int	type
(package private) static int	VARIABLE Identifiers for the various types of LHS.
(package private) java.lang.String	varName

Fields inherited from interface bsh.ParserConstants

_DEFAULT, ABSTRACT, ANDASSIGN, ANDASSIGNX, ASSIGN, BANG, BIT_AND, BIT_ANDX, BIT_OR, BIT_ORX, BOOL_AND, BOOL_ANDX, BOOL_OR, BOOL_ORX, BOOLEAN, BREAK, BYTE, CASE, CATCH, CHAR, CHARACTER_LITERAL, CLASS, COLON, COMMA, CONST, CONTINUE, DECIMAL_LITERAL, DECR, DEFAULT, DIGIT, DO, DOT, DOUBLE, ELSE, ENUM, EOF, EQ, EXPONENT, EXTENDS, FALSE, FINAL, FINALLY, FLOAT, FLOATING_POINT_LITERAL, FOR, FORMAL_COMMENT, GE, GEX, GOTO, GT, GTX, HASH_BANG_COMMENT, HEX_LITERAL, HOOK, IDENTIFIER, IF, IMPLEMENTS, IMPORT, INCR, INSTANCEOF, INT, INTEGER_LITERAL, INTERFACE, LBRACE, LBRACKET, LE, LETTER, LEX, LONG, LPAREN, LSHIFT, LSHIFTASSIGN, LSHIFTASSIGNX, LSHIFTX, LT, LTX, MINUS, MINUSASSIGN, MOD, MODASSIGN, MULTI_LINE_COMMENT, NATIVE, NE, NEW, NONPRINTABLE, NULL, OCTAL_LITERAL, ORASSIGN, ORASSIGNX, PACKAGE, PLUS, PLUSASSIGN, PRIVATE, PROTECTED, PUBLIC, RBRACE, RBRACKET, RETURN, RPAREN, RSIGNEDSHIFT, RSIGNEDSHIFTASSIGN, RSIGNEDSHIFTASSIGNX, RSIGNEDSHIFTX, RUNSIGNEDSHIFT, RUNSIGNEDSHIFTASSIGN, RUNSIGNEDSHIFTASSIGNX, RUNSIGNEDSHIFTX, SEMICOLON, SHORT, SINGLE_LINE_COMMENT, SLASH, SLASHASSIGN, STAR, STARASSIGN, STATIC, STRICTFP, STRING_LITERAL, SWITCH, SYNCHRONIZED, THROW, THROWS, TILDE, tokenImage, TRANSIENT, TRUE, TRY, VOID, VOLATILE, WHILE, XOR, XORASSIGN

Constructor Summary

(package private)	LHS(java.lang.reflect.Field field) Static field LHS Constructor.
(package private)	LHS(NameSpace nameSpace, java.lang.String varName) Variable LHS constructor.
(package private)	LHS(NameSpace nameSpace, java.lang.String varName, boolean localVar)
(package private)	LHS(java.lang.Object object, java.lang.reflect.Field field) Object field LHS Constructor.
(package private)	LHS(java.lang.Object array, int index) Array index LHS Constructor.
(package private)	LHS(java.lang.Object object, java.lang.String propName) Object property LHS Constructor.

Method Summary

java.lang.Object	assign(java.lang.Object val, boolean strictJava) Assign a value to the LHS.
java.lang.Object	getValue()
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

nameSpace

NameSpace nameSpace

localVar

boolean localVar

The assignment should be to a local variable

VARIABLE

static final int VARIABLE

Identifiers for the various types of LHS.

See Also:

Constant Field Values

FIELD

static final int FIELD

Identifiers for the various types of LHS.

See Also:

Constant Field Values

PROPERTY

static final int PROPERTY

Identifiers for the various types of LHS.

See Also:

Constant Field Values

INDEX

static final int INDEX

Identifiers for the various types of LHS.

See Also:

Constant Field Values

METHOD_EVAL

static final int METHOD_EVAL

Identifiers for the various types of LHS.

See Also:

Constant Field Values

type

int type

varName

java.lang.String varName

propName

java.lang.String propName

field

java.lang.reflect.Field field

object

java.lang.Object object

index

int index

Constructor Detail

LHS

LHS(NameSpace nameSpace,
    java.lang.String varName)

Variable LHS constructor.

LHS

LHS(NameSpace nameSpace,
    java.lang.String varName,
    boolean localVar)

Parameters:

localVar - if true the variable is set directly in the This reference's local scope. If false recursion to look for the variable definition in parent's scope is allowed. (e.g. the default case for undefined vars going to global).

LHS

LHS(java.lang.reflect.Field field)

Static field LHS Constructor. This simply calls Object field constructor with null object.

LHS

LHS(java.lang.Object object,
    java.lang.reflect.Field field)

Object field LHS Constructor.

LHS

LHS(java.lang.Object object,
    java.lang.String propName)

Object property LHS Constructor.

LHS

LHS(java.lang.Object array,
    int index)

Array index LHS Constructor.

Method Detail

getValue

public java.lang.Object getValue()
                          throws UtilEvalError

Throws:

UtilEvalError

assign

public java.lang.Object assign(java.lang.Object val,
                               boolean strictJava)
                        throws UtilEvalError

Assign a value to the LHS.

Throws:

UtilEvalError

toString

public java.lang.String toString()