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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.
*/
package org.apache.commons.lang3.mutable;
import java.io.Serializable;
/**
* A mutable <code>boolean</code> 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
* @version $Id: MutableBoolean.java 1160571 2011-08-23 07:36:08Z bayard $
*/
public class MutableBoolean implements Mutable<Boolean>, Serializable, Comparable<MutableBoolean> {
/**
* 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() {
super();
}
/**
* Constructs a new MutableBoolean with the specified value.
*
* @param value the initial value to store
*/
public MutableBoolean(boolean value) {
super();
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(Boolean value) {
super();
this.value = value.booleanValue();
}
//-----------------------------------------------------------------------
/**
* Gets the value as a Boolean instance.
*
* @return the value as a Boolean, never null
*/
public Boolean getValue() {
return Boolean.valueOf(this.value);
}
/**
* Sets the value.
*
* @param value the value to set
*/
public void setValue(boolean value) {
this.value = value;
}
/**
* Sets the value from any Boolean instance.
*
* @param value the value to set, not null
* @throws NullPointerException if the object is null
*/
public void setValue(Boolean value) {
this.value = value.booleanValue();
}
//-----------------------------------------------------------------------
/**
* Checks if the current value is <code>true</code>.
*
* @return <code>true</code> if the current value is <code>true</code>
* @since 2.5
*/
public boolean isTrue() {
return value == true;
}
/**
* Checks if the current value is <code>false</code>.
*
* @return <code>true</code> if the current value is <code>false</code>
* @since 2.5
*/
public boolean isFalse() {
return value == false;
}
//-----------------------------------------------------------------------
/**
* 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</code> if and only if the argument is
* not <code>null</code> and is an <code>MutableBoolean</code> object that contains the same
* <code>boolean</code> value as this object.
*
* @param obj the object to compare with, null returns false
* @return <code>true</code> if the objects are the same; <code>false</code> otherwise.
*/
@Override
public boolean equals(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</code> or <code>Boolean.FALSE</code>
*/
@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
*/
public int compareTo(MutableBoolean other) {
boolean anotherVal = other.value;
return value == anotherVal ? 0 : (value ? 1 : -1);
}
//-----------------------------------------------------------------------
/**
* Returns the String value of this mutable.
*
* @return the mutable value as a string
*/
@Override
public String toString() {
return String.valueOf(value);
}
}
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