org.omegahat.Environment.Parser.Parse
Class AssignExpression

java.lang.Object
  |
  +--antlr.BaseAST
        |
        +--antlr.CommonAST
              |
              +--org.omegahat.Environment.Parser.Parse.BasicExpression
                    |
                    +--org.omegahat.Environment.Parser.Parse.NumberExpression
                          |
                          +--org.omegahat.Environment.Parser.Parse.BinaryExpression
                                |
                                +--org.omegahat.Environment.Parser.Parse.OperatorExpression
                                      |
                                      +--org.omegahat.Environment.Parser.Parse.AssignExpression

All Implemented Interfaces:

antlr.collections.AST, Evaluable, ExpressionInt, OmegaTokenTypes, java.lang.Runnable, java.io.Serializable, Subsettable, TreeNodeInt

Direct Known Subclasses:

ArrayAccessAssignExpression, NamedArgument, NamedAttribute

public class AssignExpression

extends OperatorExpression

General assignment expression of the form x = 1.

See Also:

Serialized Form

Field Summary

protected Database	database
protected int	database_id
protected java.lang.String	name

Fields inherited from class org.omegahat.Environment.Parser.Parse.OperatorExpression

operation

Fields inherited from class org.omegahat.Environment.Parser.Parse.BinaryExpression

els, LHS, RHS

Fields inherited from class org.omegahat.Environment.Parser.Parse.BasicExpression

children, comments, isActive, parent, POST, PRE

Fields inherited from class antlr.BaseAST

down, right

Fields inherited from interface org.omegahat.Environment.Parser.AntlrParser.OmegaTokenTypes

ABSTRACT, ARG_LIST, ARRAY_DECLARATOR, ARRAY_INIT, ASSIGN, BAND, BAND_ASSIGN, BLOCK, BNOT, BOR, BOR_ASSIGN, BREAK, BSR, BSR_ASSIGN, BXOR, BXOR_ASSIGN, CHAR_LITERAL, CLASS_DEF, COLON, COMMA, CONTINUE, CTOR_DEF, DEC, DIV, DIV_ASSIGN, DOT, DOTS, EAGER, ELEMENT_OP, EOF, EQUAL, ESC, EXPONENT, EXPONENT_OP, EXPR, EXTENDS_CLAUSE, FINAL, FLOAT_SUFFIX, FUNCTION, GE, GT, HEX_DIGIT, IDENT, IMPLEMENTS_CLAUSE, IMPORT, INC, INDEX_OP, INSTANCE_INIT, INSTANCEOF, INTERFACE_DEF, LABELED_STAT, LAND, LAZY, LBRACK, LCURLY, LE, LITERAL_abstract, LITERAL_boolean, LITERAL_break, LITERAL_byte, LITERAL_case, LITERAL_catch, LITERAL_char, LITERAL_class, LITERAL_const, LITERAL_continue, LITERAL_default, LITERAL_do, LITERAL_double, LITERAL_eager, LITERAL_else, LITERAL_extends, LITERAL_false, LITERAL_final, LITERAL_finally, LITERAL_float, LITERAL_for, LITERAL_function, LITERAL_global, LITERAL_if, LITERAL_implements, LITERAL_import, LITERAL_in, LITERAL_instanceof, LITERAL_int, LITERAL_interface, LITERAL_lazy, LITERAL_long, LITERAL_method, LITERAL_native, LITERAL_new, LITERAL_null, LITERAL_private, LITERAL_protected, LITERAL_public, LITERAL_return, LITERAL_short, LITERAL_static, LITERAL_super, LITERAL_switch, LITERAL_synchronized, LITERAL_this, LITERAL_threadsafe, LITERAL_throw, LITERAL_throws, LITERAL_transient, LITERAL_true, LITERAL_try, LITERAL_void, LITERAL_while, LNOT, LOR, LPAREN, LT, METHOD, METHOD_CALL, METHOD_DEF, MINUS, MINUS_ASSIGN, MISSING_ARG, ML_COMMENT, MOD, MOD_ASSIGN, MODIFIERS, NOT_EQUAL, NULL_TREE_LOOKAHEAD, NUM_FLOAT, NUM_INT, NUM_LONG, OBJBLOCK, PACKAGE_DEF, PARAMETER_DEF, PARAMETERS, PLUS, PLUS_ASSIGN, POST_DEC, POST_INC, QUESTION, RBRACK, RCURLY, RETURN, RPAREN, SEMI, SEQUENCE_OP, SL, SL_ASSIGN, SL_COMMENT, SLIST, SR, SR_ASSIGN, STAR, STAR_ASSIGN, STATIC_INIT, STRING_LITERAL, SYNCHRONIZED, THROW, TRANSIENT, TYPE, TYPECAST, UNARY_MINUS, UNARY_PLUS, VARIABLE_DEF, VOCAB, WS

Constructor Summary

AssignExpression(java.lang.Object lhs, java.lang.Object rhs)

AssignExpression(java.lang.Object lhs, java.lang.Object rhs, int op)

AssignExpression(java.lang.Object lhs, java.lang.Object rhs, java.lang.Integer op)

Method Summary

boolean	arrayAssignment()
java.lang.Object	arrayOperation(java.lang.Object original, java.lang.Object rhs, Evaluator evaluator)
double	computeNumeric(double[] nums)
Database	database()
Database	database(Database db)
int	databaseId()
int	databaseId(int which)
java.lang.Object	eval(Evaluator evaluator)
protected Database	getDatabase(java.lang.String name, Evaluator evaluator)
java.lang.String	getName(Evaluator evaluator)
boolean	isMathOperation()
java.lang.Object	numericComputation(java.lang.Object[] vals)
java.lang.Object	operate(java.lang.Object original, java.lang.Object rhs, Evaluator evaluator) Perform the appropriate (potential) operation on the original value, relative the right hand-side value based on the type of assignment (=, +=, -=,++, etc.)
java.lang.Object	setField(FieldAccess expr, java.lang.Object value, Evaluator evaluator)

Methods inherited from class org.omegahat.Environment.Parser.Parse.OperatorExpression

operator, operator, separator

Methods inherited from class org.omegahat.Environment.Parser.Parse.BinaryExpression

element, element, elements, elements, getFirstChild, replaceChild, subset, toString

Methods inherited from class org.omegahat.Environment.Parser.Parse.NumberExpression

asBoolean, asInt, asInteger, asNumber, isNumber, toInteger, toInteger, toNumber

Methods inherited from class org.omegahat.Environment.Parser.Parse.BasicExpression

addChild, addComment, apply, apply, apply, children, children, comment, comment, depth, error, eval, evalInit, evaluationFrame, evaluator, getReferencedVariables, getReferencedVariables, getReferencedVariables, isActive, isActive, parent, parent, postComment, postComment, preComment, preComment, render, resolve, run, setParent, setParent, setParent, setParent, showComments, showComments, substitute, substitute

Methods inherited from class antlr.CommonAST

getText, getType, initialize, initialize, initialize, setText, setType

Methods inherited from class antlr.BaseAST

addChild, equals, equalsList, equalsListPartial, equalsTree, equalsTreePartial, findAll, findAllPartial, getNextSibling, removeChildren, setFirstChild, setNextSibling, setVerboseStringConversion, toStringList, toStringTree

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.omegahat.Environment.Parser.Parse.ExpressionInt

error, resolve, substitute

Methods inherited from interface org.omegahat.Environment.Parser.Parse.TreeNodeInt

addChild, children, depth, parent, parent

Methods inherited from interface org.omegahat.Environment.Language.Evaluable

eval

Field Detail

name

protected java.lang.String name

database_id

protected int database_id

database

protected Database database

Constructor Detail

AssignExpression

public AssignExpression(java.lang.Object lhs,
                        java.lang.Object rhs)

AssignExpression

public AssignExpression(java.lang.Object lhs,
                        java.lang.Object rhs,
                        java.lang.Integer op)

AssignExpression

public AssignExpression(java.lang.Object lhs,
                        java.lang.Object rhs,
                        int op)

Method Detail

eval

public java.lang.Object eval(Evaluator evaluator)
                      throws java.lang.Throwable

Overrides:

eval in class BinaryExpression

operate

public java.lang.Object operate(java.lang.Object original,
                                java.lang.Object rhs,
                                Evaluator evaluator)

Perform the appropriate (potential) operation on the original value, relative the right hand-side value based on the type of assignment (=, +=, -=,++, etc.)

Parameters:

original - the current value of the left hand side of the assignment.

rhs - the right hand side (RHS) of the assignment.

Returns:

the value that will be assigned, be it the RHS or the modified original value.

getName

public java.lang.String getName(Evaluator evaluator)
                         throws java.lang.Throwable

databaseId

public int databaseId(int which)

databaseId

public int databaseId()

database

public Database database(Database db)

database

public Database database()

getDatabase

protected Database getDatabase(java.lang.String name,
                               Evaluator evaluator)

arrayAssignment

public boolean arrayAssignment()

setField

public java.lang.Object setField(FieldAccess expr,
                                 java.lang.Object value,
                                 Evaluator evaluator)
                          throws java.lang.Throwable

arrayOperation

public java.lang.Object arrayOperation(java.lang.Object original,
                                       java.lang.Object rhs,
                                       Evaluator evaluator)

numericComputation

public java.lang.Object numericComputation(java.lang.Object[] vals)

computeNumeric

public double computeNumeric(double[] nums)

isMathOperation

public boolean isMathOperation()