/*
* Copyright (c) 2008-2013, 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.spring.cache;
import com.hazelcast.core.IMap;
import com.hazelcast.nio.ObjectDataInput;
import com.hazelcast.nio.ObjectDataOutput;
import com.hazelcast.nio.serialization.DataSerializable;
import org.springframework.cache.Cache;
import org.springframework.cache.support.SimpleValueWrapper;
import java.io.IOException;
/**
* @author mdogan 4/3/12
*/
public class HazelcastCache implements Cache {
private static final DataSerializable NULL = new NullDataSerializable();
private final IMap<Object, Object> map;
public HazelcastCache(final IMap<Object, Object> map) {
this.map = map;
}
public String getName() {
return map.getName();
}
public Object getNativeCache() {
return map;
}
public ValueWrapper get(final Object key) {
if (key == null) {
return null;
}
final Object value = map.get(key);
return value != null ? new SimpleValueWrapper(fromStoreValue(value)) : null;
}
public <T> T get(Object key, Class<T> type) {
Object value = fromStoreValue(this.map.get(key));
if (type != null && !type.isInstance(value)) {
throw new IllegalStateException("Cached value is not of required type [" + type.getName() + "]: " + value);
}
return (T) value;
}
public void put(final Object key, final Object value) {
if (key != null) {
map.set(key, toStoreValue(value));
}
}
protected Object toStoreValue(final Object value) {
if (value == null) {
return NULL;
}
return value;
}
protected Object fromStoreValue(final Object value) {
if (NULL.equals(value)) {
return null;
}
return value;
}
public void evict(final Object key) {
if (key != null) {
map.delete(key);
}
}
public void clear() {
map.clear();
}
final static class NullDataSerializable implements DataSerializable {
public void writeData(final ObjectDataOutput out) throws IOException {
}
public void readData(final ObjectDataInput in) throws IOException {
}
@Override
public boolean equals(Object obj) {
return obj != null && obj.getClass() == getClass();
}
@Override
public int hashCode() {
return 0;
}
}
}