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/*
* Copyright 2006-2007 the original author or authors.
*
* 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 net.sf.ezmorph.object;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.Locale;
import net.sf.ezmorph.MorphException;
import org.apache.commons.lang.builder.EqualsBuilder;
import org.apache.commons.lang.builder.HashCodeBuilder;
/**
* Morphs to a BigInteger.
*
* @author Andres Almiray <aalmiray@users.sourceforge.net>
*/
public final class BigIntegerMorpher extends AbstractObjectMorpher
{
private BigInteger defaultValue;
public BigIntegerMorpher()
{
super();
}
/**
* @param defaultValue return value if the value to be morphed is null
*/
public BigIntegerMorpher( BigInteger defaultValue )
{
super( true );
this.defaultValue = defaultValue;
}
public boolean equals( Object obj )
{
if( this == obj ){
return true;
}
if( obj == null ){
return false;
}
if( !(obj instanceof BigIntegerMorpher) ){
return false;
}
BigIntegerMorpher other = (BigIntegerMorpher) obj;
EqualsBuilder builder = new EqualsBuilder();
if( isUseDefault() && other.isUseDefault() ){
builder.append( getDefaultValue(), other.getDefaultValue() );
return builder.isEquals();
}else if( !isUseDefault() && !other.isUseDefault() ){
return builder.isEquals();
}else{
return false;
}
}
/**
* Returns the default value for this Morpher.
*/
public BigInteger getDefaultValue()
{
return defaultValue;
}
public int hashCode()
{
HashCodeBuilder builder = new HashCodeBuilder();
if( isUseDefault() ){
builder.append( getDefaultValue() );
}
return builder.toHashCode();
}
public Object morph( Object value )
{
if( value instanceof BigInteger ){
return value;
}
if( value == null ){
if( isUseDefault() ){
return defaultValue;
}else{
return (BigInteger) 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() );
}else{
try{
String str = getIntegerValue( value );
if( str.length() == 0 || str.equalsIgnoreCase( "null" ) ){
return (BigInteger) null;
}else{
return new BigInteger( str );
}
}
catch( NumberFormatException nfe ){
if( isUseDefault() ){
return defaultValue;
}else{
throw new MorphException( nfe );
}
}
}
}
public Class morphsTo()
{
return BigInteger.class;
}
/**
* Trims the String from the begining to the first "."
*/
protected String getIntegerValue( Object obj )
{
// use en_US Locale
Locale defaultLocale = Locale.getDefault();
String str = null;
try{
Locale.setDefault( Locale.US );
str = String.valueOf( obj )
.trim();
}
finally{
Locale.setDefault( defaultLocale );
}
int index = str.indexOf( "." );
if( index != -1 ){
str = str.substring( 0, index );
}
return str;
}
}
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