Class IsInstanceOf

  extended by org.hamcrest.BaseMatcher<Object>
      extended by org.hamcrest.core.IsInstanceOf
All Implemented Interfaces:
Matcher<Object>, SelfDescribing

public class IsInstanceOf
extends BaseMatcher<Object>

Tests whether the value is an instance of a class.

Constructor Summary
IsInstanceOf(Class<?> theClass)
          Creates a new instance of IsInstanceOf
Method Summary
 void describeTo(Description description)
          Generates a description of the object.
static Matcher<Object> instanceOf(Class<?> type)
          Is the value an instance of a particular type?
 boolean matches(Object item)
          Evaluates the matcher for argument item.
Methods inherited from class org.hamcrest.BaseMatcher
_dont_implement_Matcher___instead_extend_BaseMatcher_, toString
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail


public IsInstanceOf(Class<?> theClass)
Creates a new instance of IsInstanceOf

theClass - The predicate evaluates to true for instances of this class or one of its subclasses.
Method Detail


public boolean matches(Object item)
Description copied from interface: Matcher
Evaluates the matcher for argument item.

This method matches against Object, instead of the generic type T. This is because the caller of the Matcher does not know at runtime what the type is (because of type erasure with Java generics). It is down to the implementations to check the correct type.

item - the object against which the matcher is evaluated.
true if item matches, otherwise false.
See Also:


public void describeTo(Description description)
Description copied from interface: SelfDescribing
Generates a description of the object. The description may be part of a a description of a larger object of which this is just a component, so it should be worded appropriately.

description - The description to be built or appended to.


public static Matcher<Object> instanceOf(Class<?> type)
Is the value an instance of a particular type?

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