All,
JUMP could do with a utility class similar to commons-beanutils that
would allow you to get/set properties on an object without using
introspection. The following is a naive implementation for getting a
property value. A real implementation would need to use caching to
improve performance and take into account class loader issues.
package com.vividsolutions.jump.util;
import java.beans.BeanInfo;
import java.beans.IntrospectionException;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
public class BeanUtil {
private static final Object[] EMPTY_OBJECT_ARRAY = new Object[0];
public Object getProperty(Object object, String name) {
if (object != null) {
Class beanClass = object.getClass();
try {
Method method= getReadMethod(beanClass, name);
if (method != null) {
return method.invoke(object, EMPTY_OBJECT_ARRAY);
}
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
}
return null;
}
private Method getReadMethod(Class beanClass, String name) {
PropertyDescriptor descriptor = getPropertyDescriptor(beanClass, name);
if (descriptor != null) {
return descriptor.getReadMethod();
} else {
return null;
}
}
private PropertyDescriptor getPropertyDescriptor(Class beanClass,
String name) {
try {
BeanInfo beanInfo = Introspector.getBeanInfo(beanClass);
PropertyDescriptor[] props = beanInfo.getPropertyDescriptors();
for (int i = 0; i < props.length; i++) {
PropertyDescriptor property = props[i];
if (name.equals(property.getName())) {
return property;
}
}
} catch (IntrospectionException e) {
e.printStackTrace();
}
return null;
}
}
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