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This project contains a parser for the Checker Framework's stub files: https://checkerframework.org/manual/#stub . It is a fork of the JavaParser project.

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/*
 * Copyright (C) 2007-2010 Júlio Vilmar Gesser.
 * Copyright (C) 2011, 2013-2024 The JavaParser Team.
 *
 * This file is part of JavaParser.
 *
 * JavaParser can be used either under the terms of
 * a) the GNU Lesser General Public License as published by
 *     the Free Software Foundation, either version 3 of the License, or
 *     (at your option) any later version.
 * b) the terms of the Apache License
 *
 * You should have received a copy of both licenses in LICENCE.LGPL and
 * LICENCE.APACHE. Please refer to those files for details.
 *
 * JavaParser is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 */
package com.github.javaparser.printer.lexicalpreservation.changes;

import com.github.javaparser.ast.Node;
import com.github.javaparser.ast.observer.ObservableProperty;

/**
 * The change in value of a property.
 */
public class PropertyChange implements Change {

    private final ObservableProperty property;

    private final Object oldValue;

    private final Object newValue;

    public PropertyChange(ObservableProperty property, Object oldValue, Object newValue) {
        this.property = property;
        this.oldValue = oldValue;
        this.newValue = newValue;
    }

    @Override
    public ObservableProperty getProperty() {
        return property;
    }

    public Object getOldValue() {
        return oldValue;
    }

    public Object getNewValue() {
        return newValue;
    }

    @Override
    public Object getValue(ObservableProperty property, Node node) {
        if (property == this.property) {
            return newValue;
        }
        return property.getRawValue(node);
    }
}