com.google.web.bindery.autobean.shared

Class AutoBeanUtils

java.lang.Object

com.google.web.bindery.autobean.shared.AutoBeanUtils

public final class AutoBeanUtils
extends Object

Utility methods for working with AutoBeans.

Method Summary

Methods

Modifier and Type	Method and Description
static boolean	deepEquals(AutoBean<?> a, AutoBean<?> b) Compare two graphs of AutoBeans based on values.
static Map<String,Object>	diff(AutoBean<?> a, AutoBean<?> b) Returns a map of properties that differ (via Object.equals(Object)) between two AutoBeans.
static Map<String,Object>	getAllProperties(AutoBean<?> bean) Returns a map that is a copy of the properties contained in an AutoBean.
static <T,U extends T> AutoBean<T>	getAutoBean(U delegate) Return the single AutoBean wrapper that is observing the delegate object or null if the parameter is nullor not wrapped by an AutoBean.

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, toString

Method Detail

deepEquals

public static boolean deepEquals(AutoBean<?> a,
                 AutoBean<?> b)

Compare two graphs of AutoBeans based on values.

• AutoBeans are compared based on type and property values
• Lists are compared with element-order equality
• Sets and all other Collection types are compare with bag equality
• Maps are compared as a lists of keys-value pairs
• Splittables are compared by value

This will work for both simple and wrapper AutoBeans.

This method may crawl the entire object graph reachable from the input parameters and may be arbitrarily expensive to compute.

Parameters:

a - an AutoBean

b - an AutoBean

Returns:

false if any values in the graph reachable through a are different from those reachable from b

diff

public static Map<String,Object> diff(AutoBean<?> a,
                      AutoBean<?> b)

Returns a map of properties that differ (via Object.equals(Object)) between two AutoBeans. The keys are property names and the values are the value of the property in b. Properties present in a but missing in b will be represented by null values. This implementation will compare AutoBeans of different parameterizations, although the diff produced is likely meaningless.

This will work for both simple and wrapper AutoBeans.

Parameters:

a - an AutoBean

b - an AutoBean

Returns:

a Map of differing properties

getAllProperties

public static Map<String,Object> getAllProperties(AutoBean<?> bean)

Returns a map that is a copy of the properties contained in an AutoBean. The returned map is mutable, but editing it will not have any effect on the bean that produced it.

Parameters:

bean - an AutoBean

Returns:

a Map of the bean's properties

getAutoBean

public static <T,U extends T> AutoBean<T> getAutoBean(U delegate)

Return the single AutoBean wrapper that is observing the delegate object or null if the parameter is nullor not wrapped by an AutoBean.

Parameters:

delegate - a delegate object, or null

Returns:

the AutoBean wrapper for the delegate, or null