csheets.core.formula.util
Class ReferenceTransposer

java.lang.Object
  csheets.core.formula.util.ExpressionBuilder
      csheets.core.formula.util.ReferenceTransposer

All Implemented Interfaces:

ExpressionVisitor

public class ReferenceTransposer
extends ExpressionBuilder

An expression visitor that transposes the references in an expression. The visitor is used for copying and moving formulas between cells.

Author:

Einar Pehrson

Constructor Summary

ReferenceTransposer(int columns, int rows)
Creates a new reference fetcher.

Method Summary

Expression	getExpression(Expression expression) Returns a transposed copy of the given expression.
Expression	visitReference(Reference reference) Transposes the reference.

Methods inherited from class csheets.core.formula.util.ExpressionBuilder

visitBinaryOperation, visitFunctionCall, visitLiteral, visitUnaryOperation

Methods inherited from class java.lang.Object

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

Constructor Detail

ReferenceTransposer

public ReferenceTransposer(int columns,
                           int rows)

Creates a new reference fetcher.

Parameters:

columns - the number of columns to transpose formulae

rows - the number of rows to transpose formulae

Method Detail

getExpression

public Expression getExpression(Expression expression)

Returns a transposed copy of the given expression.

Overrides:

getExpression in class ExpressionBuilder

Parameters:

expression - the expression to rebuild

Returns:

the transposed expression

visitReference

public Expression visitReference(Reference reference)

Transposes the reference.

Specified by:

visitReference in interface ExpressionVisitor

Overrides:

visitReference in class ExpressionBuilder

Parameters:

reference - the reference to visit

Returns:

an arbitrary object