| /* |
| * 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.cache.query; |
| |
| import javax.cache.Cache; |
| import org.apache.ignite.IgniteCache; |
| import org.apache.ignite.internal.util.typedef.internal.S; |
| import org.apache.ignite.lang.IgniteBiPredicate; |
| import org.jetbrains.annotations.Nullable; |
| |
| /** |
| * Scan query over cache entries. Will accept all the entries if no predicate was set. |
| * |
| * @see IgniteCache#query(Query) |
| */ |
| public final class ScanQuery<K, V> extends Query<Cache.Entry<K, V>> { |
| /** */ |
| private static final long serialVersionUID = 0L; |
| |
| /** */ |
| private IgniteBiPredicate<K, V> filter; |
| |
| /** */ |
| private Integer part; |
| |
| /** |
| * Create scan query returning all entries. |
| */ |
| public ScanQuery() { |
| this(null, null); |
| } |
| |
| /** |
| * Creates partition scan query returning all entries for given partition. |
| * |
| * @param part Partition. |
| */ |
| public ScanQuery(int part) { |
| this(part, null); |
| } |
| |
| /** |
| * Create scan query with filter. |
| * |
| * @param filter Filter. If {@code null} then all entries will be returned. |
| */ |
| public ScanQuery(@Nullable IgniteBiPredicate<K, V> filter) { |
| this(null, filter); |
| } |
| |
| /** |
| * Create scan query with filter. |
| * |
| * @param part Partition. |
| * @param filter Filter. If {@code null} then all entries will be returned. |
| */ |
| public ScanQuery(@Nullable Integer part, @Nullable IgniteBiPredicate<K, V> filter) { |
| setPartition(part); |
| setFilter(filter); |
| } |
| |
| /** |
| * Gets filter. |
| * |
| * @return Filter. |
| */ |
| public IgniteBiPredicate<K, V> getFilter() { |
| return filter; |
| } |
| |
| /** |
| * Sets filter. |
| * |
| * @param filter Filter. If {@code null} then all entries will be returned. |
| * @return {@code this} for chaining. |
| */ |
| public ScanQuery<K, V> setFilter(@Nullable IgniteBiPredicate<K, V> filter) { |
| this.filter = filter; |
| |
| return this; |
| } |
| |
| /** |
| * Sets partition number over which this query should iterate. If {@code null}, query will iterate over |
| * all partitions in the cache. Must be in the range [0, N) where N is partition number in the cache. |
| * |
| * @param part Partition number over which this query should iterate. |
| * @return {@code this} for chaining. |
| */ |
| public ScanQuery<K, V> setPartition(@Nullable Integer part) { |
| this.part = part; |
| |
| return this; |
| } |
| |
| /** |
| * Gets partition number over which this query should iterate. Will return {@code null} if partition was not |
| * set. In this case query will iterate over all partitions in the cache. |
| * |
| * @return Partition number or {@code null}. |
| */ |
| @Nullable public Integer getPartition() { |
| return part; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public ScanQuery<K, V> setPageSize(int pageSize) { |
| return (ScanQuery<K, V>)super.setPageSize(pageSize); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public ScanQuery<K, V> setLocal(boolean loc) { |
| return (ScanQuery<K, V>)super.setLocal(loc); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public String toString() { |
| return S.toString(ScanQuery.class, this); |
| } |
| } |