001    /*
002     * Created on Sep 21, 2010
003     *
004     * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
005     * the License. You may obtain a copy of the License at
006     *
007     * http://www.apache.org/licenses/LICENSE-2.0
008     *
009     * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
010     * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
011     * specific language governing permissions and limitations under the License.
012     *
013     * Copyright @2010-2011 the original author or authors.
014     */
015    package org.fest.assertions.error;
016    
017    import org.fest.assertions.description.Description;
018    
019    /**
020     * Creates an error message that indicates an assertion that verifies that an object is not {@code null} failed.
021     *
022     * @author Alex Ruiz
023     */
024    public class ShouldNotBeNull implements ErrorMessageFactory {
025    
026      private static final ShouldNotBeNull INSTANCE = new ShouldNotBeNull();
027    
028      /**
029       * Returns the singleton instance of this class.
030       * @return the singleton instance of this class.
031       */
032      public static ErrorMessageFactory shouldNotBeNull() {
033        return INSTANCE;
034      }
035    
036      private ShouldNotBeNull() {}
037    
038      /** {@inheritDoc} */
039      public String create(Description d) {
040        return MessageFormatter.instance().format(d, "expecting actual not to be null");
041      }
042    }