/*
* Copyright 2007 Kasper B. Graversen
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.supercsv.cellprocessor;
import org.supercsv.cellprocessor.ift.LongCellProcessor;
import org.supercsv.cellprocessor.ift.StringCellProcessor;
import org.supercsv.exception.SuperCsvCellProcessorException;
import org.supercsv.util.CsvContext;
/**
* Converts a String to a Long.
*
* @author Kasper B. Graversen
*/
public class ParseLong extends CellProcessorAdaptor implements StringCellProcessor {
/**
* Constructs a new <tt>ParseLong</tt> processor, which converts a String to a Long.
*/
public ParseLong() {
super();
}
/**
* Constructs a new <tt>ParseLong</tt> processor, which converts a String to a Long, then calls the next processor
* in the chain.
*
* @param next
* the next processor in the chain
* @throws NullPointerException
* if next is null
*/
public ParseLong(final LongCellProcessor next) {
super(next);
}
/**
* {@inheritDoc}
*
* @throws SuperCsvCellProcessorException
* if value is null, isn't a Long or String, or can't be parsed as a Long
*/
public Object execute(final Object value, final CsvContext context) {
validateInputNotNull(value, context);
final Long result;
if( value instanceof Long ) {
result = (Long) value;
} else if( value instanceof String ) {
try {
result = Long.parseLong((String) value);
}
catch(final NumberFormatException e) {
throw new SuperCsvCellProcessorException(String.format("'%s' could not be parsed as an Long", value),
context, this, e);
}
} else {
final String actualClassName = value.getClass().getName();
throw new SuperCsvCellProcessorException(String.format(
"the input value should be of type Long or String but is of type %s", actualClassName), context, this);
}
return next.execute(result, context);
}
}
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