mdiggory 2004/04/20 14:01:35
Added: math/src/java/org/apache/commons/math/stat/univariate
BeanListUnivariateImpl.java
Log:
BeanListUnivariateImpl was misplaced during the move.
Revision Changes Path
1.1
jakarta-commons/math/src/java/org/apache/commons/math/stat/univariate/BeanListUnivariateImpl.java
Index: BeanListUnivariateImpl.java
===================================================================
/*
* Copyright 2003-2004 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.commons.math.stat.univariate;
import java.lang.reflect.InvocationTargetException;
import java.util.List;
import org.apache.commons.beanutils.PropertyUtils;
import org.apache.commons.math.MathException;
import org.apache.commons.math.util.NumberTransformer;
/**
* This implementation of DescriptiveStatistics uses commons-beanutils to gather
* univariate statistics for a List of Java Beans by property. This
* implementation uses beanutils' PropertyUtils to get a simple, nested,
* indexed, mapped, or combined property from an element of a List.
* @version $Revision: 1.1 $ $Date: 2004/04/20 21:01:35 $
*/
public class BeanListUnivariateImpl extends ListUnivariateImpl {
/**
* propertyName of the property to get from the bean
*/
private String propertyName;
/**
* Construct a BeanListUnivariate with specified
* backing list
* @param list Backing List
*/
public BeanListUnivariateImpl(List list) {
this(list, null);
}
/**
* Construct a BeanListUnivariate with specified
* backing list and propertyName
* @param list Backing List
* @param propertyName Bean propertyName
*/
public BeanListUnivariateImpl(List list, String propertyName) {
super(list);
setPropertyName(propertyName);
}
/**
* @return propertyName
*/
public String getPropertyName() {
return propertyName;
}
/**
* @param propertyName Name of Property
*/
public void setPropertyName(String propertyName) {
this.propertyName = propertyName;
this.transformer = new NumberTransformer() {
/**
* @see
org.apache.commons.math.util.NumberTransformer#transform(java.lang.Object)
*/
public double transform(final Object o) throws MathException {
try {
return (
(Number) PropertyUtils.getProperty(
o,
getPropertyName()))
.doubleValue();
} catch (IllegalAccessException e) {
throw new MathException(
"IllegalAccessException in
Transformation: "
+ e.getMessage(),
e);
} catch (InvocationTargetException e) {
throw new MathException(
"InvocationTargetException in
Transformation: "
+ e.getMessage(),
e);
} catch (NoSuchMethodException e) {
throw new MathException(
"oSuchMethodException in
Transformation: "
+ e.getMessage(),
e);
}
}
};
}
/**
* @see org.apache.commons.math.stat.Univariate#addValue(double)
*/
public void addValue(double v) {
String msg =
"The BeanListUnivariateImpl does not accept values "
+ "through the addValue method. Because elements of
this list "
+ "are JavaBeans, one must be sure to set the
'propertyName' "
+ "property and add new Beans to the underlying list
via the "
+ "addBean(Object bean) method";
throw new UnsupportedOperationException(msg);
}
/**
* Adds a bean to this list.
*
* @param bean Bean to add to the list
*/
public void addObject(Object bean) {
list.add(bean);
}
}
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