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LANG-804 - Redundant check for zero in HashCodeBuilder ctor. Patch provided by Allon Mureinik via github. 

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/lang/trunk@1526817 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Benedikt Ritter 2013-09-27 07:49:02 +00:00
parent 9ad1a4df47
commit 26375b2cfd
3 changed files with 19 additions and 19 deletions
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1
src/changes/changes.xml
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@ -22,6 +22,7 @@
<body>
<release version="3.2" date="TBA" description="Next release">
<action issue="LANG-804" type="update" dev="britter" due-to="Allon Mureinik">Redundant check for zero in HashCodeBuilder ctor</action>
<action issue="LANG-893" type="add" dev="oheger" due-to="Woonsan Ko">StrSubstitutor now supports default values for variables</action>
<action issue="LANG-913" type="add" dev="britter" due-to="Allon Mureinik">Adding .gitignore to commons-lang</action>
<action issue="LANG-837" type="add">Add ObjectUtils.toIdentityString methods that support StringBuilder, StrBuilder, and Appendable</action>

28
src/main/java/org/apache/commons/lang3/builder/HashCodeBuilder.java
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@ -520,7 +520,7 @@ public class HashCodeBuilder implements Builder<Integer> {
/**
* <p>
* Two randomly chosen, non-zero, odd numbers must be passed in. Ideally these should be different for each class,
* Two randomly chosen, odd numbers must be passed in. Ideally these should be different for each class,
* however this is not vital.
* </p>
*
@ -528,28 +528,22 @@ public class HashCodeBuilder implements Builder<Integer> {
* Prime numbers are preferred, especially for the multiplier.
* </p>
*
* @param initialNonZeroOddNumber
* a non-zero, odd number used as the initial value
* @param multiplierNonZeroOddNumber
* a non-zero, odd number used as the multiplier
* @param initialOddNumber
* am odd number used as the initial value
* @param multiplierOddNumber
* an odd number used as the multiplier
* @throws IllegalArgumentException
* if the number is zero or even
* if the number is even
*/
public HashCodeBuilder(final int initialNonZeroOddNumber, final int multiplierNonZeroOddNumber) {
if (initialNonZeroOddNumber == 0) {
throw new IllegalArgumentException("HashCodeBuilder requires a non zero initial value");
}
if (initialNonZeroOddNumber % 2 == 0) {
public HashCodeBuilder(final int initialOddNumber, final int multiplierOddNumber) {
if (initialOddNumber % 2 == 0) {
throw new IllegalArgumentException("HashCodeBuilder requires an odd initial value");
}
if (multiplierNonZeroOddNumber == 0) {
throw new IllegalArgumentException("HashCodeBuilder requires a non zero multiplier");
}
if (multiplierNonZeroOddNumber % 2 == 0) {
if (multiplierOddNumber % 2 == 0) {
throw new IllegalArgumentException("HashCodeBuilder requires an odd multiplier");
}
iConstant = multiplierNonZeroOddNumber;
iTotal = initialNonZeroOddNumber;
iConstant = multiplierOddNumber;
iTotal = initialOddNumber;
}
/**

9
src/test/java/org/apache/commons/lang3/builder/HashCodeBuilderTest.java
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@ -55,15 +55,20 @@ public class HashCodeBuilderTest {
// -----------------------------------------------------------------------
@Test(expected=IllegalArgumentException.class)
public void testConstructorEx1() {
public void testConstructorExZero() {
new HashCodeBuilder(0, 0);
}
@Test(expected=IllegalArgumentException.class)
public void testConstructorEx2() {
public void testConstructorExEven() {
new HashCodeBuilder(2, 2);
}
@Test(expected=IllegalArgumentException.class)
public void testConstructorExEvenNegative() {
new HashCodeBuilder(-2, -2);
}
static class TestObject {
private int a;