package com.philmcrew.utility;

import java.io.Serializable;

public class Operator implements Serializable 
{
    public final static int LESS_THAN_INT = 0;
    public final static int LESS_THAN_OR_EQUAL_TO_INT = 1;
    public final static int EQUAL_TO_INT = 2;
    public final static int GREATER_THAN_OR_EQUAL_TO_INT = 3;
    public final static int GREATER_THAN_INT = 4;

    public final static int NOT_EQUAL_TO_INT = 5;

    public final static Operator LESS_THAN = new Operator( LESS_THAN_INT );

    public final static Operator LESS_THAN_OR_EQUAL_TO = new Operator( LESS_THAN_OR_EQUAL_TO_INT );

    public final static Operator EQUAL_TO = new Operator( EQUAL_TO_INT );

    public final static Operator GREATER_THAN_OR_EQUAL_TO = new Operator( GREATER_THAN_OR_EQUAL_TO_INT );

    public final static Operator GREATER_THAN = new Operator( GREATER_THAN_INT );

    public final static Operator NOT_EQUAL_TO = new Operator( NOT_EQUAL_TO_INT );

    protected final static String[] operators = {"<", "<=", "=", ">=", ">", "<>"};
    protected final static String[] setOperators = {")", "]", "", "[", "(", ""};
    
    protected int op;

    protected Operator( int aop ) 
    {
        op = aop;
    }
    
    public int getOp() 
    {
        return op;
    }
    
    public boolean equals( Operator o ) 
    {
        return o != null && o.getOp() == getOp();
    }
    
    public String toString( Operator operator ) 
    {
        String ret;

        int op = operator.getOp();

        if( op >= 0 && op < operators.length )
            ret = operators[ op ];
        else
            ret = null;

        return ret;
    }
    
    public String toSetString(Operator operator ) 
    {
        String ret;

        int op = operator.getOp();

        if( op >= 0 && op < setOperators.length )
            ret = setOperators[ op ];
        else
            ret = null;

        return ret;
    }
    
    public String toSetString() 
    {
        return toSetString( this );
    }
    

    public String toString() 
    {
        return toString( this );
    }

}