psteitz 2004/06/17 15:31:58
Modified: math/src/java/org/apache/commons/math/stat/univariate
AbstractStorelessUnivariateStatistic.java
Log:
Implemented equals and hashcode.
Revision Changes Path
1.16 +30 -1
jakarta-commons/math/src/java/org/apache/commons/math/stat/univariate/AbstractStorelessUnivariateStatistic.java
Index: AbstractStorelessUnivariateStatistic.java
===================================================================
RCS file:
/home/cvs/jakarta-commons/math/src/java/org/apache/commons/math/stat/univariate/AbstractStorelessUnivariateStatistic.java,v
retrieving revision 1.15
retrieving revision 1.16
diff -u -r1.15 -r1.16
--- AbstractStorelessUnivariateStatistic.java 1 Jun 2004 21:34:35 -0000 1.15
+++ AbstractStorelessUnivariateStatistic.java 17 Jun 2004 22:31:58 -0000 1.16
@@ -15,6 +15,7 @@
*/
package org.apache.commons.math.stat.univariate;
+import org.apache.commons.math.util.MathUtils;
import java.io.Serializable;
/**
@@ -66,5 +67,33 @@
* @see
org.apache.commons.math.stat.univariate.StorelessUnivariateStatistic#increment(double)
*/
public abstract void increment(final double d);
+
+ /**
+ * Returns true iff <code>object</code> is an
+ * <code>AbstractStorelessUnivariateStatistic</code> returning the same
+ * values as this for <code>getResult()</code> and <code>getN()</code>
+ *
+ * @return true if object returns the same value as this
+ */
+ public boolean equals(Object object) {
+ if (object == this ) {
+ return true;
+ }
+ if (object instanceof AbstractStorelessUnivariateStatistic == false) {
+ return false;
+ }
+ AbstractStorelessUnivariateStatistic stat =
(AbstractStorelessUnivariateStatistic) object;
+ return (MathUtils.equals(stat.getResult(), this.getResult()) &&
+ MathUtils.equals(stat.getN(), this.getN()));
+ }
+
+ /**
+ * Returns hash code based on getResult() and getN()
+ *
+ * @return hash code
+ */
+ public int hashCode() {
+ return 31* (31 + MathUtils.hash(getResult())) + MathUtils.hash(getN());
+ }
}
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