org.apache.shiro.nexus.ShiroJCacheAdapter.java Source code

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Here is the source code for org.apache.shiro.nexus.ShiroJCacheAdapter.java

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/*
 * Sonatype Nexus (TM) Open Source Version
 * Copyright (c) 2008-present Sonatype, Inc.
 * All rights reserved. Includes the third-party code listed at http://links.sonatype.com/products/nexus/oss/attributions.
 *
 * This program and the accompanying materials are made available under the terms of the Eclipse Public License Version 1.0,
 * which accompanies this distribution and is available at http://www.eclipse.org/legal/epl-v10.html.
 *
 * Sonatype Nexus (TM) Professional Version is available from Sonatype, Inc. "Sonatype" and "Sonatype Nexus" are trademarks
 * of Sonatype, Inc. Apache Maven is a trademark of the Apache Software Foundation. M2eclipse is a trademark of the
 * Eclipse Foundation. All other trademarks are the property of their respective owners.
 */
package org.apache.shiro.nexus;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;

import javax.cache.Cache.Entry;

import org.sonatype.goodies.common.ComponentSupport;

import com.google.common.collect.Iterables;
import org.apache.shiro.cache.Cache;

import static com.google.common.base.Preconditions.checkNotNull;

/**
 * Shiro {@link javax.cache.Cache} to {@link Cache} adapter.
 *
 * @since 3.0
 */
public class ShiroJCacheAdapter<K, V> extends ComponentSupport implements Cache<K, V> {
    private final javax.cache.Cache<K, V> cache;

    private final String name;

    public ShiroJCacheAdapter(final javax.cache.Cache<K, V> cache) {
        this.cache = checkNotNull(cache);
        this.name = cache.getName();
    }

    @Override
    public V get(final K key) {
        return cache.get(key);
    }

    @Override
    public V put(final K key, final V value) {
        return cache.getAndPut(key, value);
    }

    @Override
    public V remove(final K key) {
        return cache.getAndRemove(key);
    }

    // NOTE: This appears unused in Shiro, but used by NX
    @Override
    public void clear() {
        cache.clear();
    }

    // NOTE: This appears unused in Shiro.
    @Override
    public int size() {
        return Iterables.size(cache);
    }

    // NOTE: This appears unused in Shiro.
    @Override
    public Set<K> keys() {
        Set<K> keys = new HashSet<>();
        for (Entry<K, V> entry : cache) {
            keys.add(entry.getKey());
        }
        return Collections.unmodifiableSet(keys);
    }

    @Override
    public Collection<V> values() {
        Collection<V> values = new ArrayList<>();
        for (Entry<K, V> entry : cache) {
            values.add(entry.getValue());
        }
        return Collections.unmodifiableCollection(values);
    }

    @Override
    public String toString() {
        return getClass().getSimpleName() + "{" + "cache=" + cache + ", name='" + name + '\'' + '}';
    }
}