de.unidu.is.expressions
Class VariableExpression

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

All Implemented Interfaces:

Expression

Direct Known Subclasses:

Variable

public class VariableExpression

extends AbstractExpression

An expression for a variable.

Since:

2003-10-21

Version:

$Revision: 1.5 $, $Date: 2005/03/14 17:33:14 $

Author:

Henrik Nottelmann

Field Summary

protected java.lang.String

name The variable name of this expression.

Constructor Summary

VariableExpression(java.lang.String name)
Creates a new expression object.

Method Summary

boolean	equals(java.lang.Object o) Tests whether this expressions equals the specified VariableExpression.
java.lang.String	get() Returns the variable name of this expression.
int	hashCode() Returns the hashcode of this expression object.
void	set(java.lang.String name) Sets the variable name of this expression.
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 variable name of this expression.

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

getSQLTemplate

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

name

protected java.lang.String name

The variable name of this expression.

Constructor Detail

VariableExpression

public VariableExpression(java.lang.String name)

Creates a new expression object.

Parameters:

name - variable name of this expression

Method Detail

get

public java.lang.String get()

Returns the variable name of this expression.

Returns:

variable name of this expression

set

public void set(java.lang.String name)

Sets the variable name of this expression.

Parameters:

name - name of this expression

toString

public java.lang.String toString()

Returns the variable name of this expression.

Returns:

content of this expression

equals

public boolean equals(java.lang.Object o)

Tests whether this expressions equals the specified VariableExpression.

Parameters:

o - expression to test

Returns:

true iff both expressions are equal

hashCode

public int hashCode()

Returns the hashcode of this expression object.

Returns:

hashcode of this expression object

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.

Here, the variable is substituted if possible.

Specified by:

substitute in interface Expression

Overrides:

substitute in class AbstractExpression

Parameters:

binding - variable binding

Returns:

expression after substitution