/*
 * 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.
 */

package org.apache.commons.lang3.mutable;

import java.io.Serializable;

import org.apache.commons.lang3.BooleanUtils;

A mutable boolean wrapper. 

Note that as MutableBoolean does not extend Boolean, it is not treated by String.format as a Boolean parameter.
See Also:
Boolean
Since:
2.2/**
 * A mutable {@code boolean} wrapper.
 * <p>
 * Note that as MutableBoolean does not extend Boolean, it is not treated by String.format as a Boolean parameter.
 *
 * @see Boolean
 * @since 2.2
 */
public class MutableBoolean implements Mutable<Boolean>, Serializable, Comparable<MutableBoolean> {

    
Required for serialization support.
See Also:
Serializable/**
     * Required for serialization support.
     *
     * @see java.io.Serializable
     */
    private static final long serialVersionUID = -4830728138360036487L;

    
The mutable value. /** The mutable value. */
    private boolean value;

    
Constructs a new MutableBoolean with the default value of false.
/**
     * Constructs a new MutableBoolean with the default value of false.
     */
    public MutableBoolean() {
        super();
    }

    
Constructs a new MutableBoolean with the specified value.
Params:
value –  the initial value to store/**
     * Constructs a new MutableBoolean with the specified value.
     *
     * @param value  the initial value to store
     */
    public MutableBoolean(final boolean value) {
        super();
        this.value = value;
    }

    
Constructs a new MutableBoolean with the specified value.
Params:
value –  the initial value to store, not null
Throws:
NullPointerException – if the object is null/**
     * Constructs a new MutableBoolean with the specified value.
     *
     * @param value  the initial value to store, not null
     * @throws NullPointerException if the object is null
     */
    public MutableBoolean(final Boolean value) {
        super();
        this.value = value.booleanValue();
    }

    //-----------------------------------------------------------------------
    
Gets the value as a Boolean instance.
Returns:
the value as a Boolean, never null/**
     * Gets the value as a Boolean instance.
     *
     * @return the value as a Boolean, never null
     */
    @Override
    public Boolean getValue() {
        return Boolean.valueOf(this.value);
    }

    
Sets the value.
Params:
value –  the value to set/**
     * Sets the value.
     *
     * @param value  the value to set
     */
    public void setValue(final boolean value) {
        this.value = value;
    }

    
Sets the value to false.
Since:
3.3/**
     * Sets the value to false.
     *
     * @since 3.3
     */
    public void setFalse() {
        this.value = false;
    }

    
Sets the value to true.
Since:
3.3/**
     * Sets the value to true.
     *
     * @since 3.3
     */
    public void setTrue() {
        this.value = true;
    }

    
Sets the value from any Boolean instance.
Params:
value –  the value to set, not null
Throws:
NullPointerException – if the object is null/**
     * Sets the value from any Boolean instance.
     *
     * @param value  the value to set, not null
     * @throws NullPointerException if the object is null
     */
    @Override
    public void setValue(final Boolean value) {
        this.value = value.booleanValue();
    }

    //-----------------------------------------------------------------------
    
Checks if the current value is true. 
Returns:
true if the current value is true
Since:
2.5/**
     * Checks if the current value is {@code true}.
     *
     * @return {@code true} if the current value is {@code true}
     * @since 2.5
     */
    public boolean isTrue() {
        return value;
    }

    
Checks if the current value is false. 
Returns:
true if the current value is false
Since:
2.5/**
     * Checks if the current value is {@code false}.
     *
     * @return {@code true} if the current value is {@code false}
     * @since 2.5
     */
    public boolean isFalse() {
        return !value;
    }

    //-----------------------------------------------------------------------
    
Returns the value of this MutableBoolean as a boolean.
Returns:
the boolean value represented by this object./**
     * Returns the value of this MutableBoolean as a boolean.
     *
     * @return the boolean value represented by this object.
     */
    public boolean booleanValue() {
        return value;
    }

    //-----------------------------------------------------------------------
    
Gets this mutable as an instance of Boolean.
Returns:
a Boolean instance containing the value from this mutable, never null
Since:
2.5/**
     * Gets this mutable as an instance of Boolean.
     *
     * @return a Boolean instance containing the value from this mutable, never null
     * @since 2.5
     */
    public Boolean toBoolean() {
        return Boolean.valueOf(booleanValue());
    }

    //-----------------------------------------------------------------------
    
Compares this object to the specified object. The result is true if and only if the argument is not null and is an MutableBoolean object that contains the same boolean value as this object. 
Params:
obj –  the object to compare with, null returns false
Returns:
true if the objects are the same; false otherwise./**
     * Compares this object to the specified object. The result is {@code true} if and only if the argument is
     * not {@code null} and is an {@code MutableBoolean} object that contains the same
     * {@code boolean} value as this object.
     *
     * @param obj  the object to compare with, null returns false
     * @return {@code true} if the objects are the same; {@code false} otherwise.
     */
    @Override
    public boolean equals(final Object obj) {
        if (obj instanceof MutableBoolean) {
            return value == ((MutableBoolean) obj).booleanValue();
        }
        return false;
    }

    
Returns a suitable hash code for this mutable.
Returns:
the hash code returned by Boolean.TRUE or Boolean.FALSE/**
     * Returns a suitable hash code for this mutable.
     *
     * @return the hash code returned by {@code Boolean.TRUE} or {@code Boolean.FALSE}
     */
    @Override
    public int hashCode() {
        return value ? Boolean.TRUE.hashCode() : Boolean.FALSE.hashCode();
    }

    //-----------------------------------------------------------------------
    
Compares this mutable to another in ascending order.
Params:
other –  the other mutable to compare to, not null
Returns:
negative if this is less, zero if equal, positive if greater
 where false is less than true/**
     * Compares this mutable to another in ascending order.
     *
     * @param other  the other mutable to compare to, not null
     * @return negative if this is less, zero if equal, positive if greater
     *  where false is less than true
     */
    @Override
    public int compareTo(final MutableBoolean other) {
        return BooleanUtils.compare(this.value, other.value);
    }

    //-----------------------------------------------------------------------
    
Returns the String value of this mutable.
Returns:
the mutable value as a string/**
     * Returns the String value of this mutable.
     *
     * @return the mutable value as a string
     */
    @Override
    public String toString() {
        return String.valueOf(value);
    }

}