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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 com.landawn.abacus.util;
/**
*
* Note: it's copied from Apache Commons Lang developed at The Apache Software Foundation (http://www.apache.org/), or
* under the Apache License 2.0. The methods copied from other products/frameworks may be modified in this class.
*
*
* A mutable long wrapper.
*
* Note that as MutableLong does not extend Long, it is not treated by String.format as a Long parameter.
*
* @see Long
* @since 2.1
* @version $Id: MutableLong.java 1669791 2015-03-28 15:22:59Z britter $
*/
public final class MutableLong extends Number implements Comparable, Mutable {
/**
* Required for serialization support.
*
* @see java.io.Serializable
*/
private static final long serialVersionUID = 62986528375L;
/** The mutable value. */
private long value;
/**
* Constructs a new MutableLong with the default value of zero.
*/
MutableLong() {
super();
}
/**
* Constructs a new MutableLong with the specified value.
*
* @param value the initial value to store
*/
MutableLong(final long value) {
super();
this.value = value;
}
public static MutableLong of(final long value) {
return new MutableLong(value);
}
public long value() {
return value;
}
//-----------------------------------------------------------------------
/**
* Gets the value as a Long instance.
*
* @return the value as a Long, never null
* @deprecated replace by {@link #value()}.
*/
@Deprecated
public long getValue() {
return value;
}
/**
* Sets the value.
*
* @param value the value to set
*/
public void setValue(final long value) {
this.value = value;
}
public long getAndSet(final long value) {
final long result = this.value;
this.value = value;
return result;
}
public long setAndGet(final long value) {
this.value = value;
return this.value;
}
/**
* Set with the specified new value and returns true if predicate returns true.
* Otherwise just return false without setting the value to new value.
*
* @param newValue
* @param predicate - test the current value.
* @return
*/
public boolean setIf(long newValue, Try.LongPredicate predicate) throws E {
if (predicate.test(this.value)) {
this.value = newValue;
return true;
}
return false;
}
/**
* Set with the specified new value and returns true if predicate returns true.
* Otherwise just return false without setting the value to new value.
*
* @param newValue
* @param predicate the first parameter is the current value, the second parameter is the new value.
* @return
*/
public boolean setIf(long newValue, Try.LongBiPredicate predicate) throws E {
if (predicate.test(this.value, newValue)) {
this.value = newValue;
return true;
}
return false;
}
//-----------------------------------------------------------------------
/**
* Increments the value.
*
* @since Commons Lang 2.2
*/
public void increment() {
value++;
}
/**
* Decrements the value.
*
* @since Commons Lang 2.2
*/
public void decrement() {
value--;
}
//-----------------------------------------------------------------------
/**
* Adds a value to the value of this instance.
*
* @param operand the value to add, not null
* @since Commons Lang 2.2
*/
public void add(final long operand) {
this.value += operand;
}
/**
* Subtracts a value from the value of this instance.
*
* @param operand the value to subtract, not null
* @since Commons Lang 2.2
*/
public void subtract(final long operand) {
this.value -= operand;
}
/**
* Increments by one the current value.
*
* @return the previous value
*/
public final long getAndIncrement() {
return value++;
}
/**
* Decrements by one the current value.
*
* @return the previous value
*/
public final long getAndDecrement() {
return value--;
}
/**
* Increments by one the current value.
*
* @return the updated value
*/
public final long incrementAndGet() {
return ++value;
}
/**
* Decrements by one the current value.
*
* @return the updated value
*/
public final long decrementAndGet() {
return --value;
}
/**
* Adds the given value to the current value.
*
* @param delta the value to add
* @return the previous value
*/
public final long getAndAdd(final long delta) {
final long prev = value;
value += delta;
return prev;
}
/**
* Adds the given value to the current value.
*
* @param delta the value to add
* @return the updated value
*/
public final long addAndGet(final long delta) {
return value += delta;
}
//-----------------------------------------------------------------------
// shortValue and byteValue rely on Number implementation
/**
* Returns the value of this MutableLong as an int.
*
* @return the numeric value represented by this object after conversion to type int.
*/
@Override
public int intValue() {
return (int) value;
}
/**
* Returns the value of this MutableLong as a long.
*
* @return the numeric value represented by this object after conversion to type long.
*/
@Override
public long longValue() {
return value;
}
/**
* Returns the value of this MutableLong as a float.
*
* @return the numeric value represented by this object after conversion to type float.
*/
@Override
public float floatValue() {
return value;
}
/**
* Returns the value of this MutableLong as a double.
*
* @return the numeric value represented by this object after conversion to type double.
*/
@Override
public double doubleValue() {
return value;
}
//-----------------------------------------------------------------------
/**
* 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
*/
@Override
public int compareTo(final MutableLong other) {
return (this.value > other.value) ? 1 : ((this.value == other.value) ? 0 : -1);
}
//-----------------------------------------------------------------------
/**
* Compares this object to the specified object. The result is true if and only if the argument
* is not null and is a MutableLong object that contains the same long
* value as this object.
*
* @param obj the object to compare with, null returns false
* @return true if the objects are the same; false otherwise.
*/
@Override
public boolean equals(final Object obj) {
if (obj instanceof MutableLong) {
return value == ((MutableLong) obj).value;
}
return false;
}
/**
* Returns a suitable hash code for this mutable.
*
* @return a suitable hash code
*/
@Override
public int hashCode() {
return (int) (value ^ (value >>> 32));
}
//-----------------------------------------------------------------------
/**
* Returns the String value of this mutable.
*
* @return the mutable value as a string
*/
@Override
public String toString() {
return String.valueOf(value);
}
}