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/* *************************************************************************
IT Mill Toolkit
Development of Browser User Interfaces Made Easy
Copyright (C) 2000-2006 IT Mill Ltd
*************************************************************************
This product is distributed under commercial license that can be found
from the product package on license.pdf. Use of this product might
require purchasing a commercial license from IT Mill Ltd. For guidelines
on usage, see licensing-guidelines.html
*************************************************************************
For more information, contact:
IT Mill Ltd phone: +358 2 4802 7180
Ruukinkatu 2-4 fax: +358 2 4802 7181
20540, Turku email: info@itmill.com
Finland company www: www.itmill.com
Primary source for information and releases: www.itmill.com
********************************************************************** */
package com.itmill.toolkit.data.util;
import java.beans.Introspector;
import java.beans.BeanInfo;
import java.beans.PropertyDescriptor;
import java.lang.reflect.Method;
import java.util.Collection;
import java.util.Iterator;
import com.itmill.toolkit.data.Property;
/** A wrapper class for adding the Item interface to any Java Bean.
*
* @author IT Mill Ltd.
* @version @VERSION@
* @since 3.0
*/
public class BeanItem extends PropertysetItem {
/** The bean wich this Item is based on. */
private Object bean;
/** <p>Creates a new instance of BeanItem and adds all properties of a
* Java Bean to it. The properties are identified by their respective
* bean names.</p>
*
* <p>Note that this version only supports introspectable bean
* properties and their getter and setter methods. Stand-alone "is" and
* "are" methods are not supported.</p>
*
* @param bean the Java Bean to copy properties from
*/
public BeanItem(Object bean) {
this.bean = bean;
// Try to introspect, if it fails, we just have an empty Item
try {
// Create bean information
BeanInfo info = Introspector.getBeanInfo(bean.getClass());
PropertyDescriptor[] pd = info.getPropertyDescriptors();
// Add all the bean properties as MethodProperties to this Item
for (int i = 0; i < pd.length; i++) {
Method getMethod = pd[i].getReadMethod();
Method setMethod = pd[i].getWriteMethod();
Class type = pd[i].getPropertyType();
String name = pd[i].getName();
Property p =
new MethodProperty(type, bean, getMethod, setMethod);
addItemProperty(name, p);
}
} catch (java.beans.IntrospectionException ignored) {
}
}
/** <p>Creates a new instance of BeanItem and adds all listed properties of a
* Java Bean to it - in specified order. The properties are identified by their
* respective bean names.</p>
*
* <p>Note that this version only supports introspectable bean
* properties and their getter and setter methods. Stand-alone "is" and
* "are" methods are not supported.</p>
*
* @param bean the Java Bean to copy properties from
*/
public BeanItem(Object bean, Collection propertyIds) {
this.bean = bean;
// Try to introspect, if it fails, we just have an empty Item
try {
// Create bean information
BeanInfo info = Introspector.getBeanInfo(bean.getClass());
PropertyDescriptor[] pd = info.getPropertyDescriptors();
// Add all the bean properties as MethodProperties to this Item
for (Iterator iter = propertyIds.iterator(); iter.hasNext();) {
Object id = iter.next();
for (int i = 0; i < pd.length; i++) {
String name = pd[i].getName();
if (name.equals(id)) {
Method getMethod = pd[i].getReadMethod();
Method setMethod = pd[i].getWriteMethod();
Class type = pd[i].getPropertyType();
Property p =
new MethodProperty(
type,
bean,
getMethod,
setMethod);
addItemProperty(name, p);
}
}
}
} catch (java.beans.IntrospectionException ignored) {
}
}
/** Get the underlying JavaBean object.
* @return the bean object.
*/
public Object getBean() {
return bean;
}
}
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