org.apache.commons.lang3.mutable.MutableBoolean Maven / Gradle / Ivy
/*
* 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 {@code boolean} wrapper.
*
* 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, Serializable, Comparable {
/**
* Required for serialization support.
*
* @see java.io.Serializable
*/
private static final long serialVersionUID = -4830728138360036487L;
/** The mutable value. */
private boolean value;
/**
* Constructs a new MutableBoolean with the default value of false.
*/
public MutableBoolean() {
}
/**
* Constructs a new MutableBoolean with the specified value.
*
* @param value the initial value to store
*/
public MutableBoolean(final boolean value) {
this.value = value;
}
/**
* 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) {
this.value = value.booleanValue();
}
//-----------------------------------------------------------------------
/**
* 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.
*
* @param value the value to set
*/
public void setValue(final boolean value) {
this.value = value;
}
/**
* Sets the value to false.
*
* @since 3.3
*/
public void setFalse() {
this.value = false;
}
/**
* Sets the value to true.
*
* @since 3.3
*/
public void setTrue() {
this.value = true;
}
/**
* 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 {@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 {@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.
*
* @return the boolean value represented by this object.
*/
public boolean booleanValue() {
return value;
}
//-----------------------------------------------------------------------
/**
* 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 {@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.
*
* @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.
*
* @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.
*
* @return the mutable value as a string
*/
@Override
public String toString() {
return String.valueOf(value);
}
}