de.unidu.is.expressions
Class BinaryStandardFunctionExpression

java.lang.Object
  de.unidu.is.expressions.AbstractExpression
      de.unidu.is.expressions.BinaryStandardFunctionExpression

All Implemented Interfaces:

Expression

public class BinaryStandardFunctionExpression

extends AbstractExpression

An expression for binary functions without preceding ampersend.

Since:

2005-03-17

Version:

$Revision: 1.1 $, $Date: 2005/03/17 22:30:15 $

Author:

Henrik Nottelmann

Field Summary

protected Expression	arg1 First argument of this expression.
protected Expression	arg2 Second argument of this expression.
protected java.lang.String	funcName Function name.

Constructor Summary

BinaryStandardFunctionExpression(java.lang.String funcName, Expression arg1, Expression arg2)
Creates a new expression object.

Method Summary

Expression	getArg1() Returns the first argument.
Expression	getArg2() Returns the second argument.
java.lang.String	getFunctionName() Returns the function name.
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.
java.lang.String	toString() Returns the expression.

Methods inherited from class java.lang.Object

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

Field Detail

funcName

protected java.lang.String funcName

Function name.

arg1

protected Expression arg1

First argument of this expression.

arg2

protected Expression arg2

Second argument of this expression.

Constructor Detail

BinaryStandardFunctionExpression

public BinaryStandardFunctionExpression(java.lang.String funcName,
                                        Expression arg1,
                                        Expression arg2)

Creates a new expression object.

Parameters:

funcName - function name

arg1 - first argument of this expression

arg2 - second argument of this expression

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 arguments are substituted.

Specified by:

substitute in interface Expression

Overrides:

substitute in class AbstractExpression

Parameters:

binding - variable binding

Returns:

expression after substitution

toString

public java.lang.String toString()

Returns the expression.

Returns:

expression as a string

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 AbstractExpression

Returns:

template for SQL statements

getArg1

public Expression getArg1()

Returns the first argument.

Returns:

first argument

getArg2

public Expression getArg2()

Returns the second argument.

Returns:

second argument

getFunctionName

public java.lang.String getFunctionName()

Returns the function name.

Returns:

function name