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Commonly used programming tasks in java
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package com.venky.poi;
import java.lang.reflect.Method;
import java.util.Date;
/**
*
* @author venky
*/
public class BeanIntrospector {
private Class beanClass;
protected BeanIntrospector(Class beanClass) throws InstantiationException, IllegalAccessException{
this.beanClass = beanClass;
}
Class[] primitiveNumericClasses = new Class[] { int.class, short.class, long.class, double.class, float.class };
protected boolean isNumeric(Class headingClass){
if (Number.class.isAssignableFrom(headingClass)){
return true;
}
if (headingClass.isPrimitive()){
for (Class pc : primitiveNumericClasses){
if (pc.equals(headingClass)){
return true;
}
}
}
return false;
}
protected boolean isDate(Class headClass){
return Date.class.isAssignableFrom(headClass);
}
protected boolean isBoolean(Class headClass){
return boolean.class.equals(headClass) || Boolean.class.isAssignableFrom(headClass) ;
}
protected Method getMethod(String methodName,Class ... parameterTypes) {
try {
return beanClass.getMethod(methodName, parameterTypes);
} catch (Exception ex) {
return null;
}
}
protected B createInstance(){
try {
return beanClass.newInstance();
}catch (Exception e){
throw new RuntimeException(e);
}
}
protected Method getGetter(String heading) {
return getMethod("get"+heading,new Class[]{});
}
}