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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>Object</code> wrapper.
- *
- * @param <T> the type to set and get
- * @since 2.1
- */
- public class MutableObject<T> implements Mutable<T>, 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</code>.
- */
- public MutableObject() {
- super();
- }
- /**
- * Constructs a new MutableObject with the specified value.
- *
- * @param value the initial value to store
- */
- public MutableObject(final T value) {
- super();
- 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;
- }
- //-----------------------------------------------------------------------
- /**
- * <p>
- * Compares this object against the specified object. The result is <code>true</code> if and only if the argument
- * is not <code>null</code> and is a <code>MutableObject</code> object that contains the same <code>T</code>
- * value as this object.
- * </p>
- *
- * @param obj the object to compare with, <code>null</code> returns <code>false</code>
- * @return <code>true</code> if the objects are the same;
- * <code>true</code> if the objects have equivalent <code>value</code> fields;
- * <code>false</code> 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</code> if the value is <code>null</code>.
- *
- * @return the value's hash code or <code>0</code> if the value is <code>null</code>.
- */
- @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();
- }
- }
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