/*

* Copyright 2018 by Daan van den Heuvel.

*

* This file is part of JavaDataFlow.

*

* Licensed 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 util;

import com.github.javaparser.JavaParser;

import com.github.javaparser.ast.Node;

/**

* A wrapper class to override the equals and hashCode methods to only be equal if 2 objects are the exact same instance. This class is typically used so that

* {@link JavaParser} {@link Node} classes that have equals and hashCode methods that are not strict enough, can be used as key of a hashMap.

*

* @author Daan

*/

public class HashCodeWrapper<T> {

private final T value;

public HashCodeWrapper(T value) {

this.value = value;

}

public T getValue() {

return value;

}

@Override

public String toString() {

return "HashCodeWrapper[" + value.toString() + "]";

}

@Override

public int hashCode() {

return System.identityHashCode(value);

}

@Override

public boolean equals(Object obj) {

boolean equal = false;

if (this.getClass().isInstance(obj)) {

equal = value == ((HashCodeWrapper<?>) obj).getValue();

}

return equal;

}

}