Java Boolean And andBoolOperand(Boolean o, Boolean a)

Description

And 2 Boolean operands in the context of pruning match Operand one|Operand another | And result unknown | T | unknown unknown | F | F unknown | unknown | unknown T | T | T T | F | F T | unknown | unknown F | T | F F | F | F F | unknown | F

License

Apache License

Parameter

Parameter	Description
o	one operand
a	another operand

Return

result

Declaration

public static Boolean andBoolOperand(Boolean o, Boolean a)

Method Source Code

//package com.java2s;
/**/*from w  w w  .j  a  va2 s  .  co  m*/
 * 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.
 */

public class Main {
    /**
     * And 2 Boolean operands in the context of pruning match
     *
     * Operand one|Operand another | And result
     * unknown | T | unknown
     * unknown | F | F
     * unknown | unknown | unknown
     * T | T | T
     * T | F | F
     * T | unknown | unknown
     * F | T | F
     * F | F | F
     * F | unknown | F
     * @param o
     *          one operand
     * @param a
     *          another operand
     * @return result
     */
    public static Boolean andBoolOperand(Boolean o, Boolean a) {
        // pick up unknown case and let and operator handle the rest
        if (o == null) {
            if ((a == null) || a) {
                return null;
            } else {
                return a;
            }
        } else if (a == null) {
            return o ? null : Boolean.FALSE;
        }

        return (o && a);
    }
}