Mega Code Archive
Converts an Integer to a Boolean specifying the conversion values
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/*
* 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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