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CSV manipulation library.
/*
* #%L
* Nerd4j CSV
* %%
* Copyright (C) 2013 Nerd4j
* %%
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Lesser Public License for more details.
*
* You should have received a copy of the GNU General Lesser Public
* License along with this program. If not, see
* .
* #L%
*/
package org.nerd4j.csv.field.validator;
import org.nerd4j.csv.field.CSVFieldValidator;
/**
* Implementation of the {@link CSVFieldValidator} interface
* that checks the given {@link String} length to be within
* the requested interval.
*
* @author Nerd4j Team
*/
public final class CheckStringLength extends AbstractCSVFieldValidator
{
/** The string min length. */
private final int min;
/** The string max length. */
private final int max;
/**
* Constructor with parameters.
*
* @param length the exact length that the string must have.
*/
public CheckStringLength( final int length )
{
super( "The length of {1} is not " + length );
if( length < 0 ) throw new IllegalArgumentException( "The length cannot be negative." );
this.min = length;
this.max = length;
}
/**
* Constructor with parameters.
*
* @param min the minimum length that the string must have.
* @param max the maximum length that the string must have.
*/
public CheckStringLength( final int min, final int max )
{
super( "The length of {1} is not in the interval [" + min + "," + max + "]." );
if( min < 0 ) throw new IllegalArgumentException( "The min constraint cannot be negative." );
if( max < min ) throw new IllegalArgumentException( "The max constraint cannot be smaller than the min constraint." );
this.min = min;
this.max = max;
}
/* **************** */
/* EXTENSION HOOKS */
/* **************** */
/**
* {@inheritDoc}
*/
@Override
protected boolean performValidation( final String value )
{
final int length = value.length();
return length >= min && length <= max;
}
}
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