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/*
* Copyright (c) 2008-2021, Hazelcast, Inc. All Rights Reserved.
*
* 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 com.hazelcast.cache.impl;
import com.hazelcast.cache.CacheEntryView;
import com.hazelcast.cache.impl.merge.entry.DefaultCacheEntryView;
import com.hazelcast.cache.impl.merge.entry.LazyCacheEntryView;
import com.hazelcast.cache.impl.record.CacheRecord;
import com.hazelcast.internal.serialization.Data;
import com.hazelcast.internal.serialization.SerializationService;
/**
* A class providing static factory methods that create various entry view objects.
*/
public final class CacheEntryViews {
private CacheEntryViews() {
}
/**
* Types of built-in {@link CacheEntryView} implementations.
*/
public enum CacheEntryViewType {
/**
* Represents {@link DefaultCacheEntryView}
*/
DEFAULT,
/**
* Represents {@link LazyCacheEntryView}
*/
LAZY
}
/**
* Creates a {@link DefaultCacheEntryView} instance.
*
* @param key the key to be wrapped
* @param value the value to be wrapped
* @param record {@link CacheRecord} instance to gather additional entry view properties like access time,
* expiration time and access hit
* @return the {@link DefaultCacheEntryView} instance
*/
public static CacheEntryView createDefaultEntryView(Data key, Data value, Data expiryPolicy,
CacheRecord record) {
return new DefaultCacheEntryView(key, value,
record.getCreationTime(),
record.getExpirationTime(),
record.getLastAccessTime(),
record.getHits(),
expiryPolicy);
}
public static CacheEntryView createEntryView(Data key, Data expiryPolicy,
CacheRecord record) {
if (record == null) {
throw new IllegalArgumentException("Empty record");
}
return createDefaultEntryView(key, (Data) record.getValue(), expiryPolicy, record);
}
/**
* Creates a {@link LazyCacheEntryView} instance.
*
* @param key the key to be wrapped
* @param value the value to be wrapped
* @param record {@link CacheRecord} instance to gather additional entry view properties like access time,
* expiration time and access hit
* @return the {@link LazyCacheEntryView} instance
*/
public static CacheEntryView toLazyCacheEntryView(Data key, Data value, Data expiryPolicy, CacheRecord record) {
return new LazyCacheEntryView<>(key, value,
record.getCreationTime(),
record.getExpirationTime(),
record.getLastAccessTime(),
record.getHits(),
expiryPolicy);
}
public static CacheEntryView toLazyCacheEntryView(CacheEntryView entryView,
SerializationService serializationService) {
return new LazyCacheEntryView<>(entryView.getKey(), entryView.getValue(),
entryView.getCreationTime(),
entryView.getExpirationTime(),
entryView.getLastAccessTime(),
entryView.getHits(),
entryView.getExpiryPolicy(),
serializationService);
}
/**
* Creates a {@link CacheEntryView} instance.
*
* @param key the key to be wrapped
* @param value the value to be wrapped
* @param record {@link CacheRecord} instance to gather additional entry view properties like
* access time, expiration time and access hit
* @param cacheEntryViewType the type of the {@link CacheEntryView} represented as {@link CacheEntryViewType}
* @return the {@link CacheEntryView} instance
*/
public static CacheEntryView createEntryView(Data key, Data value, Data expiryPolicy, CacheRecord record,
CacheEntryViewType cacheEntryViewType) {
if (cacheEntryViewType == null) {
throw new IllegalArgumentException("Empty cache entry view type");
}
switch (cacheEntryViewType) {
case DEFAULT:
return createDefaultEntryView(key, value, expiryPolicy, record);
case LAZY:
return toLazyCacheEntryView(key, value, expiryPolicy, record);
default:
throw new IllegalArgumentException("Invalid cache entry view type: " + cacheEntryViewType);
}
}
}
