/*
* Copyright (C) 2012, 2016 higherfrequencytrading.com
* Copyright (C) 2016 Roman Leventov
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License.
*
* This program 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package net.openhft.chronicle.hash.serialization.impl;
import net.openhft.chronicle.algo.hashing.LongHashFunction;
import net.openhft.chronicle.bytes.BytesStore;
import net.openhft.chronicle.bytes.RandomDataInput;
import net.openhft.chronicle.bytes.RandomDataOutput;
import net.openhft.chronicle.hash.AbstractData;
import net.openhft.chronicle.hash.Data;
import net.openhft.chronicle.hash.serialization.DataAccess;
import net.openhft.chronicle.wire.WireIn;
import net.openhft.chronicle.wire.WireOut;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
public final class DoubleDataAccess extends AbstractData<Double>
implements DataAccess<Double>, Data<Double> {
// Cache fields
private transient boolean bsInit;
private transient BytesStore bs;
/** State field */
private transient Double instance;
public DoubleDataAccess() {
initTransients();
}
private void initTransients() {
bs = BytesStore.wrap(new byte[8]);
}
@Override
public RandomDataInput bytes() {
if (!bsInit) {
bs.writeDouble(0, instance);
bsInit = true;
}
return bs;
}
@Override
public long offset() {
return 0;
}
@Override
public long size() {
return 8;
}
@Override
public Double get() {
return instance;
}
@Override
public Double getUsing(@Nullable Double using) {
return instance;
}
@Override
public long hash(LongHashFunction f) {
return f.hashLong(Double.doubleToRawLongBits(instance));
}
@Override
public boolean equivalent(RandomDataInput source, long sourceOffset) {
return source.readLong(sourceOffset) == Double.doubleToRawLongBits(instance);
}
@Override
public void writeTo(RandomDataOutput target, long targetOffset) {
target.writeDouble(targetOffset, instance);
}
@Override
public Data<Double> getData(@NotNull Double instance) {
this.instance = instance;
bsInit = false;
return this;
}
@Override
public void uninit() {
instance = null;
}
@Override
public void readMarshallable(@NotNull WireIn wireIn) {
// no config fields to read
initTransients();
}
@Override
public void writeMarshallable(@NotNull WireOut wireOut) {
// no config fields to write
}
@Override
public DataAccess<Double> copy() {
return new DoubleDataAccess();
}
}