OrderedContainerElementDiff.java

/*******************************************************************************
 * Copyright (c) 1998, 2015 Oracle and/or its affiliates. All rights reserved.
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
 * which accompanies this distribution.
 * The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
 * and the Eclipse Distribution License is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * Contributors:
 *     Oracle - initial API and implementation from Oracle TopLink
******************************************************************************/
package org.eclipse.persistence.tools.workbench.utility.diff;

import org.eclipse.persistence.tools.workbench.utility.io.IndentingPrintWriter;

/**
 * Wrap a list element diff and associate it with an index.
 */
public class OrderedContainerElementDiff extends DiffWrapper {
    private final int index;


    public OrderedContainerElementDiff(int index, Diff diff, Differentiator differentiator) {
        super(diff, differentiator);
        this.index = index;
    }

    /**
     * @see Diff#appendDescription(org.eclipse.persistence.tools.workbench.utility.io.IndentingPrintWriter)
     */
    public void appendDescription(IndentingPrintWriter pw) {
        if (this.different()) {
            pw.print("The values at index ");
            pw.print(this.index);
            pw.print(" are different");
            pw.println();
            pw.indent();
                super.appendDescription(pw);
            pw.undent();
        }
    }

    public int getIndex() {
        return this.index;
    }

    public boolean elementWasAdded() {
        return this.getObject1() == OrderedContainerDifferentiator.UNDEFINED_ELEMENT;
    }

    public boolean elementWasRemoved() {
        return this.getObject2() == OrderedContainerDifferentiator.UNDEFINED_ELEMENT;
    }

    public boolean elementWasModified() {
        return this.different() &&
            ! this.elementWasAdded() &&
            ! this.elementWasRemoved();
    }

}