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PrimitiveTypeOps xref
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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *     http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing, software
13   * distributed under the License is distributed on an "AS IS" BASIS,
14   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15   * See the License for the specific language governing permissions and
16   * limitations under the License.
17   */
18  package org.apache.giraph.types.ops;
19  
20  import java.io.DataInput;
21  import java.io.IOException;
22  
23  import org.apache.giraph.types.ops.collections.array.WArrayList;
24  
25  
26  /**
27   * Type operations, allowing working generically with types,
28   * but still having efficient code.
29   *
30   * Using any of the provided operations should lead to no boxing/unboxing.
31   *
32   * Useful generic wrappers to fastutil libraries are provided,
33   * so that you can look at them generically.
34   *
35   * @param <T> Type
36   */
37  public interface PrimitiveTypeOps<T> extends TypeOps<T> {
38    // primitive collections
39    /**
40     * Create WArrayList of type T.
41     * @return WArrayList
42     */
43    WArrayList<T> createArrayList();
44  
45    /**
46     * Create WArrayList of type T, given capacity.
47     * @param capacity Capacity
48     * @return WArrayList
49     */
50    WArrayList<T> createArrayList(int capacity);
51  
52    /**
53     * Create WArrayList of type T by reading it from given input.
54     * @param in Input
55     * @return WArrayList
56     */
57    WArrayList<T> readNewArrayList(DataInput in) throws IOException;
58  }