net.openhft.chronicle.map.MapEntry Maven / Gradle / Ivy
/*
* Copyright 2012-2018 Chronicle Map Contributors
*
* 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 net.openhft.chronicle.map;
import net.openhft.chronicle.hash.Data;
import net.openhft.chronicle.hash.HashEntry;
import org.jetbrains.annotations.NotNull;
/**
* A context of a present entry in the {@link ChronicleMap}.
*
* @param the map key type
* @param the map value type
* @see MapEntryOperations
* @see MapQueryContext#entry()
*/
public interface MapEntry extends HashEntry {
@Override
@NotNull
MapContext context();
/**
* Returns the entry value.
*/
@NotNull
Data value();
/**
* Replaces the entry's value with the given {@code newValue}.
*
*
This method is the default implementation for {@link MapEntryOperations#replaceValue(
*MapEntry, Data)}, which might be customized over the default.
*
* @param newValue the value to be put into the map instead of the {@linkplain #value() current
* value}
* @throws IllegalStateException if some locking/state conditions required to perform replace
* operation are not met
*/
void doReplaceValue(Data newValue);
/**
* Removes the entry from the map.
*
*
This method is the default implementation for {@link MapEntryOperations#remove(MapEntry)},
* which might be customized over the default.
*/
@Override
void doRemove();
}