/*
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* 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 Lesser General Public License for more details.
*
* Copyright (c) 2001 - 2013 Object Refinery Ltd, Pentaho Corporation and Contributors.. All rights reserved.
*/
package org.pentaho.reporting.engine.classic.core.util.beans;
/**
* A class that handles the conversion of {@link Integer} attributes to and from their {@link String} representation.
*
* @author Thomas Morgner
*/
public class LongValueConverter implements ValueConverter {
/**
* Creates a new value converter.
*/
public LongValueConverter() {
super();
}
/**
* Converts the attribute to a string.
*
* @param o
* the attribute ({@link Integer} expected).
* @return A string representing the {@link Integer} value.
*/
public String toAttributeValue( final Object o ) throws BeanException {
if ( o == null ) {
throw new NullPointerException();
}
if ( o instanceof Long ) {
return o.toString();
}
throw new BeanException( "Failed to convert object of type " + o.getClass() + ": Not a long." );
}
/**
* Converts a string to a {@link Integer}.
*
* @param s
* the string.
* @return a {@link Integer}.
*/
public Object toPropertyValue( final String s ) throws BeanException {
if ( s == null ) {
throw new NullPointerException();
}
final String val = s.trim();
if ( val.length() == 0 ) {
throw BeanException.getInstance( "Failed to convert empty string to number", null );
}
try {
return new Long( val );
} catch ( NumberFormatException be ) {
throw BeanException.getInstance( "Failed to parse number", be );
}
}
}