All Downloads are FREE. Search and download functionalities are using the official Maven repository.

org.apache.commons.lang3.mutable.MutableObject Maven / Gradle / Ivy

There is a newer version: 4.1.4
Show newest version
/*
 * 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 Object} wrapper.
 *
 * @param  the type to set and get
 * @since 2.1
 */
public class MutableObject implements Mutable, Serializable {

    /**
     * Required for serialization support.
     *
     * @see java.io.Serializable
     */
    private static final long serialVersionUID = 86241875189L;

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

    /**
     * Constructs a new MutableObject with the default value of {@code null}.
     */
    public MutableObject() {
    }

    /**
     * Constructs a new MutableObject with the specified value.
     *
     * @param value  the initial value to store
     */
    public MutableObject(final T value) {
        this.value = value;
    }

    //-----------------------------------------------------------------------
    /**
     * Gets the value.
     *
     * @return the value, may be null
     */
    @Override
    public T getValue() {
        return this.value;
    }

    /**
     * Sets the value.
     *
     * @param value  the value to set
     */
    @Override
    public void setValue(final T value) {
        this.value = value;
    }

    //-----------------------------------------------------------------------
    /**
     * 

* Compares this object against the specified object. The result is {@code true} if and only if the argument * is not {@code null} and is a {@code MutableObject} object that contains the same {@code T} * value as this object. *

* * @param obj the object to compare with, {@code null} returns {@code false} * @return {@code true} if the objects are the same; * {@code true} if the objects have equivalent {@code value} fields; * {@code false} otherwise. */ @Override public boolean equals(final Object obj) { if (obj == null) { return false; } if (this == obj) { return true; } if (this.getClass() == obj.getClass()) { final MutableObject that = (MutableObject) obj; return this.value.equals(that.value); } return false; } /** * Returns the value's hash code or {@code 0} if the value is {@code null}. * * @return the value's hash code or {@code 0} if the value is {@code null}. */ @Override public int hashCode() { return value == null ? 0 : value.hashCode(); } //----------------------------------------------------------------------- /** * Returns the String value of this mutable. * * @return the mutable value as a string */ @Override public String toString() { return value == null ? "null" : value.toString(); } }




© 2015 - 2024 Weber Informatics LLC | Privacy Policy