jetbrains.exodus.bindings.ComparableSetBinding 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 {@linkplain ComparableSet} values.
*
* @see ComparableBinding
* @see ComparableSet
*/
@SuppressWarnings("unchecked")
public class ComparableSetBinding extends ComparableBinding {
public static final ComparableSetBinding BINDING = new ComparableSetBinding();
/**
* To support sets of EntityStore custom property types, there should be an ability to
* create a separate ComparableSetBinding instance with overriden {@link #getType(Class)}
* and {@link #getBinding(int)} methods.
*/
public ComparableSetBinding() {
}
@Override
public ComparableSet readObject(@NotNull final ByteArrayInputStream stream) {
final int valueTypeId = stream.read() ^ 0x80;
final ComparableBinding itemBinding = getBinding(valueTypeId);
final ComparableSet result = new ComparableSet();
while (stream.available() > 0) {
result.addItem(itemBinding.readObject(stream));
}
result.setIsDirty(false);
return result;
}
@Override
public void writeObject(@NotNull final LightOutputStream output, @NotNull final Comparable object) {
final ComparableSet set = (ComparableSet) object;
final Class itemClass = set.getItemClass();
if (itemClass == null) {
throw new ExodusException("Attempt to write empty ComparableSet");
}
final ComparableValueType type = getType(itemClass);
output.writeByte(type.getTypeId());
final ComparableBinding itemBinding = type.getBinding();
//noinspection Convert2Lambda
set.forEach(new ComparableSet.Consumer() {
@Override
public void accept(@NotNull final Comparable item, final int index) {
itemBinding.writeObject(output, item);
}
});
}
protected ComparableValueType getType(@NotNull final Class itemClass) {
return ComparableValueType.getPredefinedTypeNullable(itemClass);
}
protected ComparableBinding getBinding(final int valueTypeId) {
return ComparableValueType.getPredefinedBinding(valueTypeId);
}
/**
* De-serializes {@linkplain ByteIterable} entry to a {@code ComparableSet} value.
*
* @param entry {@linkplain ByteIterable} instance
* @return de-serialized value
*/
public static ComparableSet entryToComparableSet(@NotNull final ByteIterable entry) {
return (ComparableSet) BINDING.entryToObject(entry);
}
/**
* Serializes {@code ComparableSet} value to the {@linkplain ArrayByteIterable} entry.
*
* @param object value to serialize
* @return {@linkplain ArrayByteIterable} entry
*/
public static ArrayByteIterable comparableSetToEntry(@NotNull final ComparableSet object) {
return BINDING.objectToEntry(object);
}
}