Mega Code Archive
Get BigInteger from an object
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import java.math.BigDecimal;
import java.math.BigInteger;
/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/
/**
* Operations on <code>Object</code>.
*
* This class tries to handle <code>null</code> input gracefully.
* An exception will generally not be thrown for a <code>null</code> input.
* Each method documents its behaviour in more detail.
*
* @author <a href="mailto:nissim@nksystems.com">Nissim Karpenstein</a>
* @author <a href="mailto:janekdb@yahoo.co.uk">Janek Bogucki</a>
* @author Daniel L. Rall
* @author Stephen Colebourne
* @author Gary Gregory
* @author Mario Winterer
* @author <a href="mailto:david@davidkarlsen.com">David J. M. Karlsen</a>
* @since 1.0
* @version $Id: ObjectUtils.java 594336 2007-11-12 22:54:02Z bayard $
*/
public class Main {
public static BigInteger getBigInteger(Object value) {
BigInteger ret = null;
if ( value != null ) {
if ( value instanceof BigInteger ) {
ret = (BigInteger) value;
} else if ( value instanceof String ) {
ret = new BigInteger( (String) value );
} else if ( value instanceof BigDecimal ) {
ret = ((BigDecimal) value).toBigInteger();
} else if ( value instanceof Number ) {
ret = BigInteger.valueOf( ((Number) value).longValue() );
} else {
throw new ClassCastException( "Not possible to coerce [" + value + "] from class " + value.getClass() + " into a BigInteger." );
}
}
return ret;
}
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