Source Code : Converts an Integer to a Boolean specifying the conversion values.

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Converts an Integer to a Boolean specifying the conversion values.

     
/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.
 */

/**
 * <p>Operations on boolean primitives and Boolean objects.</p>
 *
 * <p>This class tries to handle <code>null</code> input gracefully.
 * An exception will not be thrown for a <code>null</code> input.
 * Each method documents its behaviour in more detail.</p>
 * 
 * @author Stephen Colebourne
 * @author Matthew Hawthorne
 * @author Gary Gregory
 * @since 2.0
 * @version $Id: BooleanUtils.java 589050 2007-10-27 05:07:45Z bayard $
 */
public class Main {
  /**
   * <p>Converts an Integer to a Boolean specifying the conversion values.</p>
   * 
   * <pre>
   *   BooleanUtils.toBooleanObject(new Integer(0), new Integer(0), new Integer(2), new Integer(3)) = Boolean.TRUE
   *   BooleanUtils.toBooleanObject(new Integer(2), new Integer(1), new Integer(2), new Integer(3)) = Boolean.FALSE
   *   BooleanUtils.toBooleanObject(new Integer(3), new Integer(1), new Integer(2), new Integer(3)) = null
   * </pre>
   *
   * @param value  the Integer to convert
   * @param trueValue  the value to match for <code>true</code>,
   *  may be <code>null</code>
   * @param falseValue  the value to match for <code>false</code>,
   *  may be <code>null</code>
   * @param nullValue  the value to to match for <code>null</code>,
   *  may be <code>null</code>
   * @return Boolean.TRUE, Boolean.FALSE, or <code>null</code>
   * @throws IllegalArgumentException if no match
   */
  public static Boolean toBooleanObject(Integer value, Integer trueValue, Integer falseValue, Integer nullValue) {
      if (value == null) {
          if (trueValue == null) {
              return Boolean.TRUE;
          } else if (falseValue == null) {
              return Boolean.FALSE;
          } else if (nullValue == null) {
              return null;
          }
      } else if (value.equals(trueValue)) {
          return Boolean.TRUE;
      } else if (value.equals(falseValue)) {
          return Boolean.FALSE;
      } else if (value.equals(nullValue)) {
          return null;
      }
      // no match
      throw new IllegalArgumentException("The Integer did not match any specified value");
  }
}

   
    
    
    
    
  

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