Performs a logical exclusive OR on the array of Boolean values and returns true if and only if the Boolean array is not null and 1 and only 1 Boolean wrapper object evaluates to true, as determined by the BooleanUtils.valueof method. - Java java.lang

Java examples for java.lang:boolean

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Description

Performs a logical exclusive OR on the array of Boolean values and returns true if and only if the Boolean array is not null and 1 and only 1 Boolean wrapper object evaluates to true, as determined by the BooleanUtils.valueof method.

Demo Code

/*//from w w  w  .  j a v a  2 s .  c  o m
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//package com.java2s;

public class Main {
    public static void main(String[] argv) throws Exception {
        boolean values = true;
        System.out.println(xor(values));
    }

    /**
     * Performs a logical exclusive OR on the array of Boolean values and returns true if and only if the Boolean array
     * is not null and 1 and only 1 Boolean wrapper object evaluates to true, as determined by the BooleanUtils.valueof
     * method.
     * 
     * @param values the array of Boolean values evaluated with the logical exclusive OR operator.
     * @return a boolean value of true if and only if the Boolean array is not null and 1 and only 1 of the Boolean
     * wrapper objects evaluates to true.
     * @see #valueOf(Boolean)
     */
    public static boolean xor(final Boolean... values) {
        boolean result = false; // guilty until proven innocent.

        if (values != null) {
            for (Boolean value : values) {
                boolean primitiveValue = valueOf(value);

                if (result && primitiveValue) {
                    return false; // short-circuit if we find more than 1 true value
                }

                result |= primitiveValue;
            }
        }

        return result;
    }

    /**
     * Determines the primitive boolean value of the specified Boolean wrapper object.  The Boolean value is true
     * if and only if it is equal to Boolean.TRUE.  This method handles null values.
     * 
     * @param value the Boolean wrapper value to convert to a primitive boolean value.
     * @return a primitive boolean value equivalent to the value of the Boolean wrapper object.
     * @see java.lang.Boolean
     */
    public static boolean valueOf(final Boolean value) {
        return Boolean.TRUE.equals(value);
    }
}

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