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/*
@ITMillApache2LicenseForJavaFiles@
*/
package com.itmill.toolkit.data.util;
import java.beans.BeanInfo;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;
import java.lang.reflect.Method;
import java.util.Arrays;
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 which this Item is based on.
*/
private final Object bean;
/**
* <p>
* Creates a new instance of <code>BeanItem</code> and adds all properties
* of a Java Bean to it. The properties are identified by their respective
* bean names.
* </p>
*
* <p>
* Note : This version only supports introspectable bean properties and
* their getter and setter methods. Stand-alone <code>is</code> and
* <code>are</code> 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
final BeanInfo info = Introspector.getBeanInfo(bean.getClass());
final PropertyDescriptor[] pd = info.getPropertyDescriptors();
// Add all the bean properties as MethodProperties to this Item
for (int i = 0; i < pd.length; i++) {
final Method getMethod = pd[i].getReadMethod();
final Method setMethod = pd[i].getWriteMethod();
final Class<?> type = pd[i].getPropertyType();
final String name = pd[i].getName();
if ((getMethod != null)
&& getMethod.getDeclaringClass() != Object.class) {
final Property p = new MethodProperty(type, bean,
getMethod, setMethod);
addItemProperty(name, p);
}
}
} catch (final java.beans.IntrospectionException ignored) {
}
}
/**
* <p>
* Creates a new instance of <code>BeanItem</code> 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 : This version only supports introspectable bean properties and
* their getter and setter methods. Stand-alone <code>is</code> and
* <code>are</code> methods are not supported.
* </p>
*
* @param bean
* the Java Bean to copy properties from.
* @param propertyIds
* id of the property.
*/
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
final BeanInfo info = Introspector.getBeanInfo(bean.getClass());
final PropertyDescriptor[] pd = info.getPropertyDescriptors();
// Add all the bean properties as MethodProperties to this Item
final Iterator iter = propertyIds.iterator();
while (iter.hasNext()) {
final Object id = iter.next();
for (int i = 0; i < pd.length; i++) {
final String name = pd[i].getName();
if (name.equals(id)) {
final Method getMethod = pd[i].getReadMethod();
final Method setMethod = pd[i].getWriteMethod();
final Class<?> type = pd[i].getPropertyType();
if ((getMethod != null)) {
final Property p = new MethodProperty(type, bean,
getMethod, setMethod);
addItemProperty(name, p);
}
}
}
}
} catch (final java.beans.IntrospectionException ignored) {
}
}
/**
* <p>
* Creates a new instance of <code>BeanItem</code> 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 : This version only supports introspectable bean properties and
* their getter and setter methods. Stand-alone <code>is</code> and
* <code>are</code> methods are not supported.
* </p>
*
* @param bean
* the Java Bean to copy properties from.
* @param propertyIds
* ids of the properties.
*/
public BeanItem(Object bean, String[] propertyIds) {
this(bean, Arrays.asList(propertyIds));
}
/**
* Gets the underlying JavaBean object.
*
* @return the bean object.
*/
public Object getBean() {
return bean;
}
}
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