org.joda.money.Ser Maven / Gradle / Ivy
/*
* Copyright 2009-present, Stephen Colebourne
*
* 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.joda.money;
import java.io.Externalizable;
import java.io.IOException;
import java.io.InvalidClassException;
import java.io.InvalidObjectException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.io.StreamCorruptedException;
import java.math.BigDecimal;
import java.math.BigInteger;
/**
* A package scoped class used to manage serialization efficiently.
*
* This class is mutable and intended for use by a single thread.
*/
final class Ser implements Externalizable {
/** Type for BigMoney. */
static final byte BIG_MONEY = 'B';
/** Type for Money. */
static final byte MONEY = 'M';
/** Type for CurrencyUnit. */
static final byte CURRENCY_UNIT = 'C'; // not in use yet
/** The type. */
private byte type;
/** The data object. */
private Object object;
/**
* Constructor for serialization.
*/
public Ser() {
}
/**
* Constructor for package.
*
* @param type the type
* @param object the object
*/
Ser(byte type, Object object) {
this.type = type;
this.object = object;
}
//-----------------------------------------------------------------------
/**
* Outputs the data.
*
* @serialData One byte type code, then data specific to the type.
* @param out the output stream
* @throws IOException if an error occurs
*/
@Override
public void writeExternal(ObjectOutput out) throws IOException {
out.writeByte(type);
switch (type) {
case BIG_MONEY: {
BigMoney obj = (BigMoney) object;
writeBigMoney(out, obj);
return;
}
case MONEY: {
Money obj = (Money) object;
writeBigMoney(out, obj.toBigMoney());
return;
}
case CURRENCY_UNIT: {
CurrencyUnit obj = (CurrencyUnit) object;
writeCurrency(out, obj);
return;
}
}
throw new InvalidClassException("Joda-Money bug: Serialization broken");
}
private void writeBigMoney(ObjectOutput out, BigMoney obj) throws IOException {
writeCurrency(out, obj.getCurrencyUnit());
byte[] bytes = obj.getAmount().unscaledValue().toByteArray();
out.writeInt(bytes.length);
out.write(bytes);
out.writeInt(obj.getScale());
}
private void writeCurrency(ObjectOutput out, CurrencyUnit obj) throws IOException {
out.writeUTF(obj.getCode());
out.writeShort(obj.getNumericCode());
out.writeShort(obj.getDefaultFractionDigits());
}
/**
* Outputs the data.
*
* @param in the input stream
* @throws IOException if an error occurs
*/
@Override
public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
type = in.readByte();
switch (type) {
case BIG_MONEY: {
object = readBigMoney(in);
return;
}
case MONEY: {
object = new Money(readBigMoney(in));
return;
}
case CURRENCY_UNIT: {
object = readCurrency(in);
return;
}
}
throw new StreamCorruptedException("Serialization input has invalid type");
}
private BigMoney readBigMoney(ObjectInput in) throws IOException {
CurrencyUnit currency = readCurrency(in);
byte[] bytes = new byte[in.readInt()];
in.readFully(bytes);
BigDecimal bd = new BigDecimal(new BigInteger(bytes), in.readInt());
BigMoney bigMoney = new BigMoney(currency, bd);
return bigMoney;
}
private CurrencyUnit readCurrency(ObjectInput in) throws IOException {
String code = in.readUTF();
CurrencyUnit singletonCurrency = CurrencyUnit.of(code);
if (singletonCurrency.getNumericCode() != in.readShort()) {
throw new InvalidObjectException("Deserialization found a mismatch in the numeric code for currency " + code);
}
if (singletonCurrency.getDefaultFractionDigits() != in.readShort()) {
throw new InvalidObjectException("Deserialization found a mismatch in the decimal places for currency " + code);
}
return singletonCurrency;
}
/**
* Returns the object that will replace this one.
*
* @return the read object, should never be null
*/
private Object readResolve() {
return object;
}
}