| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 org.apache.ignite.internal.processors.cache; |
| |
| import java.util.Collection; |
| import java.util.HashMap; |
| import java.util.Iterator; |
| import java.util.Map; |
| import java.util.NoSuchElementException; |
| import javax.cache.Cache; |
| import org.apache.ignite.internal.util.F0; |
| import org.apache.ignite.internal.util.GridSerializableCollection; |
| import org.apache.ignite.internal.util.typedef.F; |
| import org.apache.ignite.internal.util.typedef.internal.A; |
| import org.apache.ignite.lang.IgnitePredicate; |
| import org.jetbrains.annotations.Nullable; |
| |
| /** |
| * Value collection based on provided entries with all remove operations backed |
| * by underlying cache. |
| */ |
| public class GridCacheValueCollection<K, V> extends GridSerializableCollection<V> { |
| /** */ |
| private static final long serialVersionUID = 0L; |
| |
| /** Cache context. */ |
| private final GridCacheContext<K, V> ctx; |
| |
| /** Filter. */ |
| private final IgnitePredicate<Cache.Entry<K, V>>[] filter; |
| |
| /** Base map. */ |
| private final Map<K, Cache.Entry<K, V>> map; |
| |
| /** |
| * @param ctx Cache context. |
| * @param c Entry collection. |
| * @param filter Filter. |
| */ |
| public GridCacheValueCollection(GridCacheContext<K, V> ctx, Collection<? extends Cache.Entry<K, V>> c, |
| @Nullable IgnitePredicate<Cache.Entry<K, V>>[] filter) { |
| map = new HashMap<>(c.size(), 1.0f); |
| |
| assert ctx != null; |
| |
| this.ctx = ctx; |
| this.filter = filter; |
| |
| for (Cache.Entry<K, V> e : c) { |
| if (e != null) |
| map.put(e.getKey(), e); |
| } |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public Iterator<V> iterator() { |
| return new GridCacheIterator<K, V, V>( |
| ctx, |
| map.values(), |
| F.<K, V>cacheEntry2Get(), |
| ctx.vararg(F0.and(filter, F.<K, V>cacheHasPeekValue())) |
| ) { |
| { |
| advance(); |
| } |
| |
| private V next; |
| |
| private void advance() { |
| if (next != null) |
| return; |
| |
| boolean has; |
| |
| while (has = super.hasNext()) { |
| next = super.next(); |
| |
| if (next != null) |
| break; |
| } |
| |
| if (!has) |
| next = null; |
| } |
| |
| @SuppressWarnings( {"IteratorHasNextCallsIteratorNext"}) |
| @Override public boolean hasNext() { |
| advance(); |
| |
| return next != null; |
| } |
| |
| @Override public V next() { |
| advance(); |
| |
| if (next == null) |
| throw new NoSuchElementException(); |
| |
| V v = next; |
| |
| next = null; |
| |
| return v; |
| } |
| }; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public void clear() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public boolean remove(Object o) { |
| A.notNull(o, "o"); |
| |
| boolean rmv = false; |
| |
| for (Iterator<Cache.Entry<K, V>> it = map.values().iterator(); it.hasNext();) { |
| Cache.Entry<K, V> e = it.next(); |
| |
| if (F.isAll(e, filter) && F.eq(o, e.getValue())) { |
| it.remove(); |
| |
| ctx.grid().cache(ctx.name()).remove(e.getKey(), e.getValue()); |
| |
| rmv = true; |
| } |
| } |
| |
| return rmv; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public int size() { |
| return F.size(map.values(), filter); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public boolean contains(Object o) { |
| A.notNull(o, "o"); |
| |
| for (Cache.Entry<K, V> e : map.values()) |
| if (F.isAll(e, filter) && F.eq(e.getValue(), o)) |
| return true; |
| |
| return false; |
| } |
| } |