jetbrains.exodus.bindings.DoubleBinding Maven / Gradle / Ivy
/**
* Copyright 2010 - 2022 JetBrains s.r.o.
*
* 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
*
* https://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 jetbrains.exodus.bindings;
import jetbrains.exodus.ArrayByteIterable;
import jetbrains.exodus.ByteIterable;
import jetbrains.exodus.ExodusException;
import jetbrains.exodus.util.LightOutputStream;
import org.jetbrains.annotations.NotNull;
import java.io.ByteArrayInputStream;
/**
* {@linkplain ComparableBinding} for unsigned non-negative {@linkplain Double} values.
* For signed values use {@linkplain SignedDoubleBinding}.
*
* @see SignedDoubleBinding
* @see ComparableBinding
*/
public final class DoubleBinding extends ComparableBinding {
public static final DoubleBinding BINDING = new DoubleBinding();
private DoubleBinding() {
}
@Override
public Double readObject(@NotNull final ByteArrayInputStream stream) {
return BindingUtils.readUnsignedDouble(stream);
}
@Override
public void writeObject(@NotNull final LightOutputStream output, @NotNull final Comparable object) {
final double value = (Double) object;
if (value < 0) {
throw new ExodusException("DoubleBinding can be used only for unsigned non-negative values.");
}
output.writeUnsignedLong(Double.doubleToLongBits(value));
}
/**
* De-serializes {@linkplain ByteIterable} entry to an unsigned non-negative {@code double} value.
*
* @param entry {@linkplain ByteIterable} instance
* @return de-serialized value
*/
public static double entryToDouble(@NotNull final ByteIterable entry) {
return (Double) BINDING.entryToObject(entry);
}
/**
* Serializes unsigned non-negative {@code double} value to the {@linkplain ArrayByteIterable} entry.
*
* @param object value to serialize
* @return {@linkplain ArrayByteIterable} entry
*/
public static ArrayByteIterable doubleToEntry(final double object) {
return BINDING.objectToEntry(object);
}
}