/*
* Copyright (c) 2010 Lockheed Martin Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.eurekastreams.commons.test;
import org.hamcrest.BaseMatcher;
import org.hamcrest.Description;
/**
* Simple matcher base class to let unit tests do custom parameter tests easily by deriving and implementing just a
* single method. Treats null reference and cast exceptions as a non-match (returns false) so that users can simply
* write expressions without having to check for nulls or correct types while getting the right comparison behavior.
*
* @param <T>
* Type of object to test.
*/
public abstract class EasyMatcher<T> extends BaseMatcher<T>
{
/**
* Typed method to determine if an object meets the criteria.
*
* @param testObject
* Object to test.
* @return If the object meets the criteria.
*/
protected abstract boolean isMatch(T testObject);
/**
* {@inheritDoc}
*/
@Override
public boolean matches(final Object inArg0)
{
try
{
return isMatch((T) inArg0);
}
catch (NullPointerException ex)
{
return false;
}
catch (ClassCastException ex)
{
return false;
}
}
/**
* {@inheritDoc}
*/
@Override
public void describeTo(final Description inArg0)
{
}
}