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Add hashcode support to ConfigurationPropertyName

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Provide a hashcode implementation for `ConfigurationPropertyName` so
that instances can be stored in Map without them all ending up in the
same bucket.

See gh-20625
This commit is contained in:
Phillip Webb
2020-05-04 22:31:18 -07:00
parent 5309912927
commit 85e9a73e85
2 changed files with 78 additions and 56 deletions
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121
spring-boot-project/spring-boot/src/main/java/org/springframework/boot/context/properties/source/ConfigurationPropertyName.java
View File

@@ -64,6 +64,8 @@ public final class ConfigurationPropertyName implements Comparable<Configuration
private String string;
private int hashCode;
private ConfigurationPropertyName(Elements elements) {
this.elements = elements;
this.uniformElements = new CharSequence[elements.getSize()];
@@ -322,46 +324,22 @@ public final class ConfigurationPropertyName implements Comparable<Configuration
}
}
private boolean defaultElementEquals(Elements e1, Elements e2, int i) {
int l1 = e1.getLength(i);
int l2 = e2.getLength(i);
boolean indexed1 = e1.getType(i).isIndexed();
boolean indexed2 = e2.getType(i).isIndexed();
int i1 = 0;
int i2 = 0;
while (i1 < l1) {
if (i2 >= l2) {
return false;
}
char ch1 = indexed1 ? e1.charAt(i, i1) : Character.toLowerCase(e1.charAt(i, i1));
char ch2 = indexed2 ? e2.charAt(i, i2) : Character.toLowerCase(e2.charAt(i, i2));
if (!indexed1 && !ElementsParser.isAlphaNumeric(ch1)) {
i1++;
}
else if (!indexed2 && !ElementsParser.isAlphaNumeric(ch2)) {
i2++;
}
else if (ch1 != ch2) {
return false;
}
else {
i1++;
i2++;
}
}
if (i2 < l2) {
if (indexed2) {
return false;
}
do {
char ch2 = Character.toLowerCase(e2.charAt(i, i2++));
if (ElementsParser.isAlphaNumeric(ch2)) {
private boolean fastElementEquals(Elements e1, Elements e2, int i) {
int length1 = e1.getLength(i);
int length2 = e2.getLength(i);
if (length1 == length2) {
int i1 = 0;
while (length1-- != 0) {
char ch1 = e1.charAt(i, i1);
char ch2 = e2.charAt(i, i1);
if (ch1 != ch2) {
return false;
}
i1++;
}
while (i2 < l2);
return true;
}
return true;
return false;
}
private boolean dashIgnoringElementEquals(Elements e1, Elements e2, int i) {
@@ -404,27 +382,70 @@ public final class ConfigurationPropertyName implements Comparable<Configuration
return true;
}
private boolean fastElementEquals(Elements e1, Elements e2, int i) {
int length1 = e1.getLength(i);
int length2 = e2.getLength(i);
if (length1 == length2) {
int i1 = 0;
while (length1-- != 0) {
char ch1 = e1.charAt(i, i1);
char ch2 = e2.charAt(i, i1);
if (ch1 != ch2) {
return false;
}
private boolean defaultElementEquals(Elements e1, Elements e2, int i) {
int l1 = e1.getLength(i);
int l2 = e2.getLength(i);
boolean indexed1 = e1.getType(i).isIndexed();
boolean indexed2 = e2.getType(i).isIndexed();
int i1 = 0;
int i2 = 0;
while (i1 < l1) {
if (i2 >= l2) {
return false;
}
char ch1 = indexed1 ? e1.charAt(i, i1) : Character.toLowerCase(e1.charAt(i, i1));
char ch2 = indexed2 ? e2.charAt(i, i2) : Character.toLowerCase(e2.charAt(i, i2));
if (!indexed1 && !ElementsParser.isAlphaNumeric(ch1)) {
i1++;
}
return true;
else if (!indexed2 && !ElementsParser.isAlphaNumeric(ch2)) {
i2++;
}
else if (ch1 != ch2) {
return false;
}
else {
i1++;
i2++;
}
}
return false;
if (i2 < l2) {
if (indexed2) {
return false;
}
do {
char ch2 = Character.toLowerCase(e2.charAt(i, i2++));
if (ElementsParser.isAlphaNumeric(ch2)) {
return false;
}
}
while (i2 < l2);
}
return true;
}
@Override
public int hashCode() {
return 0;
int hashCode = this.hashCode;
Elements elements = this.elements;
if (hashCode == 0 && elements.getSize() != 0) {
for (int elementIndex = 0; elementIndex < elements.getSize(); elementIndex++) {
int elementHashCode = 0;
boolean indexed = elements.getType(elementIndex).isIndexed();
int length = elements.getLength(elementIndex);
for (int i = 0; i < length; i++) {
char ch = elements.charAt(elementIndex, i);
if (!indexed) {
ch = Character.toLowerCase(ch);
}
if (ElementsParser.isAlphaNumeric(ch)) {
elementHashCode = 31 * elementHashCode + ch;
}
}
hashCode = 31 * hashCode + elementHashCode;
}
}
return hashCode;
}
@Override

13
spring-boot-project/spring-boot/src/test/java/org/springframework/boot/context/properties/source/ConfigurationPropertyNameTests.java
View File

@@ -1,5 +1,5 @@
/*
* Copyright 2012-2019 the original author or authors.
* Copyright 2012-2020 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -545,17 +545,18 @@ class ConfigurationPropertyNameTests {
ConfigurationPropertyName n13 = ConfigurationPropertyName.of("f-o-o[b-a-r--]");
ConfigurationPropertyName n14 = ConfigurationPropertyName.of("[1]");
ConfigurationPropertyName n15 = ConfigurationPropertyName.of("[-1]");
assertThat(n01.hashCode()).isEqualTo(n02.hashCode());
assertThat(n01.hashCode()).isEqualTo(n02.hashCode());
assertThat(n01.hashCode()).isEqualTo(n03.hashCode());
assertThat(n01.hashCode()).isEqualTo(n04.hashCode());
assertThat(n01.hashCode()).isEqualTo(n11.hashCode());
assertThat((Object) n01).isEqualTo(n01);
assertThat(n01.hashCode()).isEqualTo(n01.hashCode());
assertThat((Object) n01).isEqualTo(n02);
assertThat(n01.hashCode()).isEqualTo(n02.hashCode());
assertThat((Object) n01).isEqualTo(n03);
assertThat(n01.hashCode()).isEqualTo(n03.hashCode());
assertThat((Object) n01).isEqualTo(n04);
assertThat(n01.hashCode()).isEqualTo(n04.hashCode());
assertThat((Object) n11).isEqualTo(n03);
assertThat(n11.hashCode()).isEqualTo(n03.hashCode());
assertThat((Object) n03).isEqualTo(n11);
assertThat(n03.hashCode()).isEqualTo(n11.hashCode());
assertThat((Object) n01).isNotEqualTo(n05);
assertThat((Object) n01).isNotEqualTo(n06);
assertThat((Object) n07).isNotEqualTo(n08);