net.sourceforge.pbeans
Class SimpleOperator

java.lang.Object
  net.sourceforge.pbeans.SimpleOperator

All Implemented Interfaces:

Operator

public final class SimpleOperator
extends java.lang.Object
implements Operator

SimpleOperator generates a simple operation on two expressions. The two given expressions are simply concatenated with operation (specified in constructor) between them. Note: objects of this class are immutable (i.e. once created they cannot be changed).

Author:

Marius Siegas

Field Summary

Fields inherited from interface net.sourceforge.pbeans.Operator

EQUALS, GREATER_THAN, IN, IS, LESS_THAN, LIKE

Constructor Summary

SimpleOperator(java.lang.String operation)

Method Summary

boolean	equals(java.lang.Object obj) Compares this simple operation to other object.
java.lang.String	operation(java.lang.String variable, java.lang.String value) Generates SQL operation using given expressions as arguments.
java.lang.String	operatorString()
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

SimpleOperator

public SimpleOperator(java.lang.String operation)

Method Detail

operation

public java.lang.String operation(java.lang.String variable,
                                  java.lang.String value)

Description copied from interface: Operator

Generates SQL operation using given expressions as arguments. The resulting string should containt the two specified strings in it. Also there must be enough spacing around operation (if needed) for it not to collapse with expressions.

Specified by:

operation in interface Operator

Parameters:

variable - variable expression (i.e. left-hand expression).

value - value expression (i.e. right-hand expression).

Returns:

generated string containing variable, value and the operation(-s) performed on them.

equals

public boolean equals(java.lang.Object obj)

Compares this simple operation to other object. The result is true if and only if the given object is SimpleOperator and its operation string equals to the operation string of this object.

Overrides:

equals in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

operatorString

public java.lang.String operatorString()

Specified by:

operatorString in interface Operator