18154768944

Committed 01 Oct 2025 07:26AM UTC coverage: 81.882% (-0.005%) from 81.887%

Build # 18154768944

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push

github

Committed by

web-flow

Commit Message

Merge pull request #290 from TAKETODAY/dev/jspecify

jspecify

Coverage Stats

59788 of 78013 branches covered (76.64%)

Branch coverage included in aggregate %.

141239 of 167496 relevant lines covered (84.32%)

3.6 hits per line

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95.65

today-context/src/main/java/infra/cache/interceptor/SimpleKey.java

/*
 * Copyright 2017 - 2025 the original author or authors.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see [https://www.gnu.org/licenses/]
 */

package infra.cache.interceptor;

import org.jspecify.annotations.Nullable;

import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.Serial;
import java.io.Serializable;
import java.util.Arrays;

import infra.lang.Assert;

/**
 * A simple key as returned from the {@link SimpleKeyGenerator}.
 *
 * @author Phillip Webb
 * @author Juergen Hoeller
 * @author <a href="https://github.com/TAKETODAY">Harry Yang</a>
 * @see SimpleKeyGenerator
 * @since 4.0
 */
@SuppressWarnings("serial")
public class SimpleKey implements Serializable {

  /**
   * An empty key.
   */
  public static final SimpleKey EMPTY = new SimpleKey();

  private final Object[] params;

  // Effectively final, just re-calculated on deserialization
  private transient int hashCode;

  /**
   * Create a new {@link SimpleKey} instance.
   *
   * @param elements the elements of the key
   */
  public SimpleKey(Object @Nullable ... elements) {
    Assert.notNull(elements, "Elements is required");
    this.params = elements.clone();
    // Pre-calculate hashCode field
    this.hashCode = calculateHash(this.params);
  }

  @Override
  public boolean equals(@Nullable Object other) {
    return (this == other || (other instanceof SimpleKey that
            && Arrays.deepEquals(this.params, that.params)));
  }

  @Override
  public final int hashCode() {
    // Expose pre-calculated hashCode field
    return this.hashCode;
  }

  @Override
  public String toString() {
    return getClass().getSimpleName() + " " + Arrays.deepToString(this.params);
  }

  @Serial
  private void readObject(ObjectInputStream ois) throws IOException, ClassNotFoundException {
    ois.defaultReadObject();
    // Re-calculate hashCode field on deserialization
    this.hashCode = calculateHash(this.params);
  }

  /**
   * Calculate the hash of the key using its elements and
   * mix the result with the finalising function of MurmurHash3.
   */
  private static int calculateHash(@Nullable Object[] params) {
    int hash = Arrays.deepHashCode(params);
    hash = (hash ^ (hash >>> 16)) * 0x85ebca6b;
    hash = (hash ^ (hash >>> 13)) * 0xc2b2ae35;
    return hash ^ (hash >>> 16);
  }

}

1	/*
2	* Copyright 2017 - 2025 the original author or authors.
3	*
4	* This program is free software: you can redistribute it and/or modify
5	* it under the terms of the GNU General Public License as published by
6	* the Free Software Foundation, either version 3 of the License, or
7	* (at your option) any later version.
8	*
9	* This program is distributed in the hope that it will be useful,
10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12	* GNU General Public License for more details.
13	*
14	* You should have received a copy of the GNU General Public License
15	* along with this program. If not, see [https://www.gnu.org/licenses/]
16	*/
17
18	package infra.cache.interceptor;
19
20	import org.jspecify.annotations.Nullable;
21
22	import java.io.IOException;
23	import java.io.ObjectInputStream;
24	import java.io.Serial;
25	import java.io.Serializable;
26	import java.util.Arrays;
27
28	import infra.lang.Assert;
29
30	/**
31	* A simple key as returned from the {@link SimpleKeyGenerator}.
32	*
33	* @author Phillip Webb
34	* @author Juergen Hoeller
35	* @author <a href="https://github.com/TAKETODAY">Harry Yang</a>
36	* @see SimpleKeyGenerator
37	* @since 4.0
38	*/
39	@SuppressWarnings("serial")
40	public class SimpleKey implements Serializable {
41
42	/**
43	* An empty key.
44	*/
45	public static final SimpleKey EMPTY = new SimpleKey();	7✔
46
47	private final Object[] params;
48
49	// Effectively final, just re-calculated on deserialization
50	private transient int hashCode;
51
52	/**
53	* Create a new {@link SimpleKey} instance.
54	*
55	* @param elements the elements of the key
56	*/
57	public SimpleKey(Object @Nullable ... elements) {	2✔
58	Assert.notNull(elements, "Elements is required");	3✔
59	this.params = elements.clone();	5✔
60	// Pre-calculate hashCode field
61	this.hashCode = calculateHash(this.params);	5✔
62	}	1✔
63
64	@Override
65	public boolean equals(@Nullable Object other) {
66	return (this == other \|\| (other instanceof SimpleKey that	14✔
67	&& Arrays.deepEquals(this.params, that.params)));	5✔
68	}
69
70	@Override
71	public final int hashCode() {
72	// Expose pre-calculated hashCode field
73	return this.hashCode;	3✔
74	}
75
76	@Override
77	public String toString() {
78	return getClass().getSimpleName() + " " + Arrays.deepToString(this.params);	×
79	}
80
81	@Serial
82	private void readObject(ObjectInputStream ois) throws IOException, ClassNotFoundException {
83	ois.defaultReadObject();	2✔
84	// Re-calculate hashCode field on deserialization
85	this.hashCode = calculateHash(this.params);	5✔
86	}	1✔
87
88	/**
89	* Calculate the hash of the key using its elements and
90	* mix the result with the finalising function of MurmurHash3.
91	*/
92	private static int calculateHash(@Nullable Object[] params) {
93	int hash = Arrays.deepHashCode(params);	3✔
94	hash = (hash ^ (hash >>> 16)) * 0x85ebca6b;	8✔
95	hash = (hash ^ (hash >>> 13)) * 0xc2b2ae35;	8✔
96	return hash ^ (hash >>> 16);	6✔
97	}
98
99	}

TAKETODAY / today-infrastructure / 18154768944

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