SchemaComponentNodeStructure.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.mappingsplugin.ui.schema;

import java.util.ListIterator;
import javax.swing.Icon;

import org.eclipse.persistence.tools.workbench.mappingsmodel.schema.MWSchemaComponent;
import org.eclipse.persistence.tools.workbench.uitools.Displayable;
import org.eclipse.persistence.tools.workbench.utility.AbstractModel;
import org.eclipse.persistence.tools.workbench.utility.iterators.NullListIterator;


abstract class SchemaComponentNodeStructure
    extends AbstractModel
    implements Displayable
{
    private MWSchemaComponent component;


    // **************** Constructors ******************************************

    SchemaComponentNodeStructure(MWSchemaComponent component) {
        super();
        this.component = component;
    }


    // **************** SchemaComponentNodeStructure contract *****************

    protected MWSchemaComponent getComponent() {
        return this.component;
    }

    void disengageComponent() {
        this.component = null;
    }

    ListIterator details() {
        if (this.component == null) {
            return NullListIterator.instance();
        }
        else {
            return this.componentDetails();
        }
    }

    protected ListIterator componentDetails() {
        return NullListIterator.instance();
    }


    // **************** Displayable contract **********************************

    /** No icons here */
    public Icon icon() {
        return null;
    }


    // **************** Comparable contract ***********************************

    public int compareTo(Object o) {
        return DEFAULT_COMPARATOR.compare(this, o);
    }
}