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From mdigg...@apache.org
Subject cvs commit: jakarta-commons/math/src/experimental/org/apache/commons/math/util BeanTransformerTest.java BeanTransformer.java
Date Tue, 01 Jun 2004 22:10:17 GMT
mdiggory    2004/06/01 15:10:17

  Added:       math/src/experimental/org/apache/commons/math/util
                        BeanTransformerTest.java BeanTransformer.java
  Log:
  Moving BeanTransformer to Experimental
  
  Revision  Changes    Path
  1.1                  jakarta-commons/math/src/experimental/org/apache/commons/math/util/BeanTransformerTest.java
  
  Index: BeanTransformerTest.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.util;
  
  import org.apache.commons.math.MathException;
  import org.apache.commons.math.TestUtils;
  
  import junit.framework.TestCase;
  
  /**
   * @version $Revision: 1.1 $ $Date: 2004/06/01 22:10:17 $
   */
  public class BeanTransformerTest extends TestCase {
      
      /**
       *
       */
      public void testConstructor(){
          BeanTransformer b = new BeanTransformer();
          assertNull(b.getPropertyName());
      }
      
      /**
       *
       */
      public void testConstructorString(){
          String name = "property";
          BeanTransformer b = new BeanTransformer(name);
          assertEquals(name, b.getPropertyName());
      }
      
      /**
       *
       */
      public void testSetPropertyName(){
          String name = "property";
          BeanTransformer b = new BeanTransformer();
          b.setPropertyName(name);
          assertEquals(name, b.getPropertyName());
      }
      
      /**
       * 
       */
      public void testTransformNoSuchMethod(){
          BeanTransformer b = new BeanTransformer("z");
          TestBean target = new TestBean();
  		try {
  		    b.transform(target);
  			fail("Expecting MathException");
  		} catch (MathException e) {
  			// expected
  		}
      }
      
      /**
       * 
       */
      public void testTransform() throws Exception {
          BeanTransformer b = new BeanTransformer("x");
          TestBean target = new TestBean();
  		double value = Double.NaN;
  		value = b.transform(target);
  		TestUtils.assertEquals(1.0, value, 1.0e-2);
      }
      
      /**
       * 
       */
      public void testTransformInvalidType() throws Exception {
          BeanTransformer b = new BeanTransformer("y");
          TestBean target = new TestBean();
          try {
  			b.transform(target);
              fail("Expecting ClassCastException");
          } catch(ClassCastException ex){
              // success
          }
      }
  }
  
  
  
  1.1                  jakarta-commons/math/src/experimental/org/apache/commons/math/util/BeanTransformer.java
  
  Index: BeanTransformer.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.util;
  
  import java.lang.reflect.InvocationTargetException;
  import org.apache.commons.math.MathException;
  import org.apache.commons.beanutils.PropertyUtils;
  
  /**
   * Uses PropertyUtils to map a Bean getter to a double value.
   * @version $Revision: 1.1 $ $Date: 2004/06/01 22:10:17 $
   */
  public class BeanTransformer implements NumberTransformer {
  
      /**
       * The propertyName for this Transformer
       */
      private String propertyName;
  
      /**
       * Create a BeanTransformer
       */
      public BeanTransformer() {
          this(null);
      }
  
      /**
       * Create a BeanTransformer with a specific PropertyName.
       * @param property The property.
       */
      public BeanTransformer(final String property) {
          super();
          setPropertyName(property);
      }
  
      /**
       * Get the property String
       * @return the Property Name String
       */
      public String getPropertyName() {
          return propertyName;
      }
  
      /**
       * Set the propertyString
       * @param string The string to set the property to.
       */
      public void setPropertyName(final String string) {
          propertyName = string;
      }
  
      /**
       * @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);
          }
      }
  }
  
  

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