de.unidu.is.expressions
Class Str2NumFunctionExpression

java.lang.Object
  de.unidu.is.expressions.AbstractExpression
      de.unidu.is.expressions.FunctionExpression
          de.unidu.is.expressions.Str2NumFunctionExpression

All Implemented Interfaces:

Expression

public class Str2NumFunctionExpression

extends FunctionExpression

An expression for the str2num function.

Since:

2003-10-27

Version:

$Revision: 1.4 $, $Date: 2005/02/21 17:29:18 $

Author:

Henrik Nottelmann

Field Summary

Fields inherited from class de.unidu.is.expressions.FunctionExpression

arg, name

Constructor Summary

Str2NumFunctionExpression(Expression arg)
Creates a new expression object.

Method Summary

java.lang.String	getSQLTemplate() Returns a string representation for this expression which can be used as a template in an SQL statement.
Expression	substitute(java.util.Map binding) Performs an substitution for variables, e.g. for each key variable in the specified binding, all occurences of ${key} are replaced by the corresponding value in the map.

Methods inherited from class de.unidu.is.expressions.FunctionExpression

getArgument, getName, setArgument, setName, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

Str2NumFunctionExpression

public Str2NumFunctionExpression(Expression arg)

Creates a new expression object.

Parameters:

arg - function argument

Method Detail

substitute

public Expression substitute(java.util.Map binding)

Performs an substitution for variables, e.g. for each key variable in the specified binding, all occurences of ${key} are replaced by the corresponding value in the map.

Only the argument is substituted.

Specified by:

substitute in interface Expression

Overrides:

substitute in class FunctionExpression

Parameters:

binding - variable binding

Returns:

expression after substitution

getSQLTemplate

public java.lang.String getSQLTemplate()

Returns a string representation for this expression which can be used as a template in an SQL statement.

Specified by:

getSQLTemplate in interface Expression

Overrides:

getSQLTemplate in class FunctionExpression

Returns:

template for SQL statements