Package org.assertj.core.groups
Class Properties<T>
java.lang.Object
org.assertj.core.groups.Properties<T>
Extracts the values of a specified property from the elements of a given
Iterable
or array.- Author:
- Yvonne Wang, Mikhail Mazursky, Joel Costigliola, Florent Biville, Olivier Michallat
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Method Summary
Modifier and TypeMethodDescriptionstatic Properties<Object>
extractProperty
(String propertyName) Creates a new
.Properties
with given propertyName and Object as property type.static <T> Properties<T>
extractProperty
(String propertyName, Class<T> propertyType) Creates a new
.Properties
Extracts the values of the property (specified previously in
) from the elements of the givenextractProperty(String)
.Iterable
Extracts the values of the property (specified previously in
) from the elements of the given array.extractProperty(String)
<U> Properties<U>
Specifies the target type of an instance that was previously created withextractProperty(String)
.
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Method Details
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extractProperty
Creates a new
.Properties
- Type Parameters:
T
- the type of value to extract.- Parameters:
propertyName
- the name of the property to be read from the elements of aIterable
. It may be a nested property (e.g. "address.street.number").propertyType
- the type of property to extract- Returns:
- the created
Properties
. - Throws:
NullPointerException
- if the given property name isnull
.IllegalArgumentException
- if the given property name is empty.
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extractProperty
Creates a new
.Properties
with given propertyName and Object as property type.- Parameters:
propertyName
- the name of the property to be read from the elements of aIterable
. It may be a nested property (e.g. "address.street.number").- Returns:
- the created
Properties
. - Throws:
NullPointerException
- if the given property name isnull
.IllegalArgumentException
- if the given property name is empty.
-
ofType
Specifies the target type of an instance that was previously created withextractProperty(String)
.This is so that you can write:
instead of:extractProperty("name").ofType(String.class).from(fellowshipOfTheRing);
extractProperty("name", String.class).from(fellowshipOfTheRing);
- Type Parameters:
U
- the type of value to extract.- Parameters:
propertyType
- the type of property to extract.- Returns:
- a new
Properties
with the given type.
-
from
Extracts the values of the property (specified previously in
) from the elements of the givenextractProperty(String)
.Iterable
- Parameters:
c
- the givenIterable
.- Returns:
- the values of the previously specified property extracted from the given
Iterable
. - Throws:
IntrospectionError
- if an element in the givenIterable
does not have a property with a matching name.
-
from
Extracts the values of the property (specified previously in
) from the elements of the given array.extractProperty(String)
- Parameters:
array
- the given array.- Returns:
- the values of the previously specified property extracted from the given array.
- Throws:
IntrospectionError
- if an element in the given array does not have a property with a matching name.
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