/* This file is part of the db4o object database http://www.db4o.com
Copyright (C) 2004 - 2011 Versant Corporation http://www.versant.com
db4o is free software; you can redistribute it and/or modify it under
the terms of version 3 of the GNU General Public License as published
by the Free Software Foundation.
db4o is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License along
with this program. If not, see http://www.gnu.org/licenses/. */
package com.db4o.internal.handlers;
import com.db4o.*;
import com.db4o.foundation.*;
import com.db4o.internal.*;
import com.db4o.internal.marshall.*;
import com.db4o.marshall.*;
import com.db4o.reflect.*;
/**
* @exclude
*/
public class DoubleHandler extends LongHandler {
private static final Double DEFAULTVALUE = new Double(0);
public Object coerce(ReflectClass claxx, Object obj) {
return Coercion4.toDouble(obj);
}
public Object defaultValue(){
return DEFAULTVALUE;
}
public Class primitiveJavaClass(){
return double.class;
}
public Object read(MarshallerFamily mf, StatefulBuffer buffer,
boolean redirect) throws CorruptionException {
return mf._primitive.readDouble(buffer);
}
Object read1(ByteArrayBuffer buffer){
return primitiveMarshaller().readDouble(buffer);
}
public void write(Object a_object, ByteArrayBuffer a_bytes){
a_bytes.writeLong(Platform4.doubleToLong(((Double)a_object).doubleValue()));
}
@Override
public Object read(ReadContext context) {
Long l = (Long)super.read(context);
return new Double(Platform4.longToDouble(l.longValue()));
}
public void write(WriteContext context, Object obj) {
context.writeLong(Platform4.doubleToLong(((Double)obj).doubleValue()));
}
public PreparedComparison internalPrepareComparison(Object source) {
final double sourceDouble = ((Double)source).doubleValue();
return new PreparedComparison() {
public int compareTo(Object target) {
if(target == null){
return 1;
}
double targetDouble = ((Double)target).doubleValue();
return sourceDouble == targetDouble ? 0 : (sourceDouble < targetDouble ? - 1 : 1);
}
};
}
}