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feilong is a suite of core and expanded libraries that include utility classes, http, excel,cvs, io classes, and much much more.
/*
* Copyright (C) 2008 feilong
*
* 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 com.feilong.lib.ezmorph.object;
import java.math.BigDecimal;
import java.math.BigInteger;
import com.feilong.lib.ezmorph.IntegerValueUtil;
import com.feilong.lib.ezmorph.MorphException;
/**
* Morphs to a BigInteger.
*
* @author Andres Almiray
*/
public final class BigIntegerMorpher extends AbstractObjectMorpher{
/** The default value. */
private BigInteger defaultValue;
//---------------------------------------------------------------
/**
* Instantiates a new big integer morpher.
*/
public BigIntegerMorpher(){
super();
}
/**
* Instantiates a new big integer morpher.
*
* @param defaultValue
* return value if the value to be morphed is null
*/
public BigIntegerMorpher(BigInteger defaultValue){
super(true);
this.defaultValue = defaultValue;
}
//---------------------------------------------------------------
/**
* Morph.
*
* @param value
* the value
* @return the object
*/
@Override
public Object morph(Object value){
if (value instanceof BigInteger){
return value;
}
if (value == null){
if (isUseDefault()){
return defaultValue;
}
return null;
}
if (value instanceof Number){
if (value instanceof Float){
Float f = ((Float) value);
if (f.isInfinite() || f.isNaN()){
throw new MorphException("BigInteger can not be infinite or NaN");
}
}else if (value instanceof Double){
Double d = ((Double) value);
if (d.isInfinite() || d.isNaN()){
throw new MorphException("BigInteger can not be infinite or NaN");
}
}else if (value instanceof BigDecimal){
return ((BigDecimal) value).toBigInteger();
}
return BigInteger.valueOf(((Number) value).longValue());
}
try{
String str = IntegerValueUtil.getIntegerValue(value);
if (str.length() == 0 || str.equalsIgnoreCase("null")){
return null;
}
return new BigInteger(str);
}catch (NumberFormatException nfe){
if (isUseDefault()){
return defaultValue;
}
throw new MorphException(nfe);
}
}
//---------------------------------------------------------------
/**
* Morphs to.
*
* @return the class
*/
@Override
public Class morphsTo(){
return BigInteger.class;
}
}