DiffWrapper.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 java.io.StringWriter;

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


/**
 * Wrap another diff.
 */
public abstract class DiffWrapper implements Diff {
    protected final Diff diff;
    protected final Differentiator differentiator;


    public DiffWrapper(Diff diff, Differentiator differentiator) {
        super();
        this.diff = diff;
        this.differentiator = differentiator;
    }

    /**
     * @see Diff#getObject1()
     */
    public Object getObject1() {
        return this.diff.getObject1();
    }

    /**
     * @see Diff#getObject2()
     */
    public Object getObject2() {
        return this.diff.getObject2();
    }

    /**
     * @see Diff#identical()
     */
    public boolean identical() {
        return this.diff.identical();
    }

    /**
     * @see Diff#different()
     */
    public boolean different() {
        return this.diff.different();
    }

    /**
     * @see Diff#getDifferentiator()
     */
    public Differentiator getDifferentiator() {
        return this.differentiator;
    }

    /**
     * @see Diff#getDescription()
     */
    public String getDescription() {
        if (this.diff.identical()) {
            return "";
        }
        StringWriter sw = new StringWriter();
        IndentingPrintWriter pw = new IndentingPrintWriter(sw);
        this.diff.appendDescription(pw);
        return sw.toString();
    }

    /**
     * @see Diff#appendDescription(org.eclipse.persistence.tools.workbench.utility.io.IndentingPrintWriter)
     */
    public void appendDescription(IndentingPrintWriter pw) {
        this.diff.appendDescription(pw);
    }

    public Diff getDiff() {
        return this.diff;
    }

    /**
     * @see Object#toString()
     */
    public String toString() {
        return (this.identical()) ? NO_DIFFERENCE_DESCRIPTION : this.getDescription();
    }

}