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Caught NoClassDefFound Error when DiscoverClass is not present, eliminating 

runtime dependency on [discovery], [logging].
Removed factory method taking string class name (use of Class.ForName()).


git-svn-id: https://svn.apache.org/repos/asf/jakarta/commons/proper/math/trunk@141365 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Phil Steitz 2004-07-10 16:04:47 +00:00
parent 78a6df915a
commit a4bde1dc48
2 changed files with 10 additions and 43 deletions
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23
src/java/org/apache/commons/math/stat/univariate/DescriptiveStatistics.java
View File

@ -34,29 +34,13 @@ import org.apache.commons.math.stat.univariate.summary.SumOfSquares;
/** /**
* Abstract factory class for univariate statistical summaries. * Abstract factory class for univariate statistical summaries.
* *
* @version $Revision: 1.8 $ $Date: 2004/06/23 16:26:16 $ * @version $Revision: 1.9 $ $Date: 2004/07/10 16:04:47 $
*/ */
public abstract class DescriptiveStatistics implements StatisticalSummary, Serializable { public abstract class DescriptiveStatistics implements StatisticalSummary, Serializable {
/** Serialization UID */ /** Serialization UID */
static final long serialVersionUID = 5188298269533339922L; static final long serialVersionUID = 5188298269533339922L;
/**
* Create an instance of a <code>DescriptiveStatistics</code>
* @param cls the type of <code>DescriptiveStatistics</code> object to
* create.
* @return a new factory.
* @throws InstantiationException is thrown if the object can not be
* created.
* @throws IllegalAccessException is thrown if the type's default
* constructor is not accessible.
* @throws ClassNotFoundException if the named
* <code>DescriptiveStatistics</code> type can not be found.
*/
public static DescriptiveStatistics newInstance(String cls) throws InstantiationException, IllegalAccessException, ClassNotFoundException {
return newInstance(Class.forName(cls));
}
/** /**
* Create an instance of a <code>DescriptiveStatistics</code> * Create an instance of a <code>DescriptiveStatistics</code>
* @param cls the type of <code>DescriptiveStatistics</code> object to * @param cls the type of <code>DescriptiveStatistics</code> object to
@ -82,9 +66,8 @@ public abstract class DescriptiveStatistics implements StatisticalSummary, Seria
factory = (DescriptiveStatistics) dc.newInstance( factory = (DescriptiveStatistics) dc.newInstance(
DescriptiveStatistics.class, DescriptiveStatistics.class,
"org.apache.commons.math.stat.univariate.DescriptiveStatisticsImpl"); "org.apache.commons.math.stat.univariate.DescriptiveStatisticsImpl");
} catch(Exception ex) { } catch(Throwable t) {
ex.printStackTrace(); return new DescriptiveStatisticsImpl();
// ignore as default implementation will be used.
} }
return factory; return factory;
} }

30
src/java/org/apache/commons/math/stat/univariate/SummaryStatistics.java
View File

@ -23,29 +23,13 @@ import org.apache.commons.math.util.MathUtils;
/** /**
* Abstract factory class for univariate statistical summaries. * Abstract factory class for univariate statistical summaries.
* *
* @version $Revision: 1.9 $ $Date: 2004/06/23 16:26:16 $ * @version $Revision: 1.10 $ $Date: 2004/07/10 16:04:47 $
*/ */
public abstract class SummaryStatistics implements StatisticalSummary, Serializable { public abstract class SummaryStatistics implements StatisticalSummary, Serializable {
/** Serialization UID */ /** Serialization UID */
static final long serialVersionUID = -6400596334135654825L; static final long serialVersionUID = -6400596334135654825L;
/**
* Create an instance of a <code>SummaryStatistics</code>
* @param cls the type of <code>SummaryStatistics</code> object to
* create.
* @return a new factory.
* @throws InstantiationException is thrown if the object can not be
* created.
* @throws IllegalAccessException is thrown if the type's default
* constructor is not accessible.
* @throws ClassNotFoundException if the named
* <code>SummaryStatistics</code> type can not be found.
*/
public static SummaryStatistics newInstance(String cls) throws InstantiationException, IllegalAccessException, ClassNotFoundException {
return newInstance(Class.forName(cls));
}
/** /**
* Create an instance of a <code>DescriptiveStatistics</code> * Create an instance of a <code>DescriptiveStatistics</code>
* @param cls the type of <code>SummaryStatistics</code> object to * @param cls the type of <code>SummaryStatistics</code> object to
@ -62,19 +46,19 @@ public abstract class SummaryStatistics implements StatisticalSummary, Serializa
/** /**
* Create an instance of a <code>DescriptiveStatistics</code> * Create an instance of a <code>DescriptiveStatistics</code>
* @return a new factory. * @return a new SummaryStatistics instance.
*/ */
public static SummaryStatistics newInstance() { public static SummaryStatistics newInstance() {
SummaryStatistics factory = null; SummaryStatistics instance = null;
try { try {
DiscoverClass dc = new DiscoverClass(); DiscoverClass dc = new DiscoverClass();
factory = (SummaryStatistics) dc.newInstance( instance = (SummaryStatistics) dc.newInstance(
SummaryStatistics.class, SummaryStatistics.class,
"org.apache.commons.math.stat.univariate.SummaryStatisticsImpl"); "org.apache.commons.math.stat.univariate.SummaryStatisticsImpl");
} catch(Exception ex) { } catch(Throwable t) {
// ignore as default implementation will be used. return new SummaryStatisticsImpl();
} }
return factory; return instance;
} }