| /* |
| * Copyright (c) 2011, 2021 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 v. 2.0 which is available at |
| * http://www.eclipse.org/legal/epl-2.0, |
| * or the Eclipse Distribution License v. 1.0 which is available at |
| * http://www.eclipse.org/org/documents/edl-v10.php. |
| * |
| * SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause |
| */ |
| |
| // Contributors: |
| // Oracle - initial API and implementation |
| // |
| package org.eclipse.persistence.jpa.jpql.tools.model.query; |
| |
| import java.io.IOException; |
| import org.eclipse.persistence.jpa.jpql.ExpressionTools; |
| |
| /** |
| * This {@link StateObject} simply holds onto a string. |
| * |
| * @version 2.4 |
| * @since 2.4 |
| * @author Pascal Filion |
| */ |
| @SuppressWarnings("nls") |
| public abstract class SimpleStateObject extends AbstractStateObject { |
| |
| /** |
| * The text held by this state object. |
| */ |
| private String text; |
| |
| /** |
| * Notifies the text property has changed. |
| */ |
| public static final String TEXT_PROPERTY = "text"; |
| |
| /** |
| * Creates a new <code>SimpleStateObject</code>. |
| * |
| * @param parent The parent of this state object, which cannot be <code>null</code> |
| * @exception NullPointerException The given parent cannot be <code>null</code> |
| */ |
| protected SimpleStateObject(StateObject parent) { |
| super(parent); |
| } |
| |
| /** |
| * Creates a new <code>SimpleStateObject</code>. |
| * |
| * @param parent The parent of this state object, which cannot be <code>null</code> |
| * @param text The text held by this state object |
| * @exception NullPointerException The given parent cannot be <code>null</code> |
| */ |
| protected SimpleStateObject(StateObject parent, String text) { |
| super(parent); |
| this.text = text; |
| } |
| |
| /** |
| * Returns the text held by this state object. |
| * |
| * @return This model's text value |
| */ |
| public String getText() { |
| return text; |
| } |
| |
| /** |
| * Determines whether this state object is holding a non-empty string. |
| * |
| * @return <code>true</code> if the text is non-empty; <code>false</code> otherwise |
| */ |
| public boolean hasText() { |
| return !ExpressionTools.stringIsEmpty(text); |
| } |
| |
| @Override |
| public boolean isEquivalent(StateObject stateObject) { |
| |
| if (super.isEquivalent(stateObject)) { |
| SimpleStateObject simple = (SimpleStateObject) stateObject; |
| return ExpressionTools.valuesAreEqual(text, simple.text); |
| } |
| |
| return false; |
| } |
| |
| /** |
| * Sets the text held by this state object. |
| * |
| * @param text This model's text value |
| */ |
| public void setText(String text) { |
| String oldText = this.text; |
| this.text = text; |
| firePropertyChanged(TEXT_PROPERTY, oldText, text); |
| } |
| |
| /** |
| * Sets the text to the given value without notifying the listeners. |
| * |
| * @param text This model's text value |
| */ |
| protected void setTextInternally(String text) { |
| this.text = text; |
| } |
| |
| @Override |
| protected void toTextInternal(Appendable writer) throws IOException { |
| if (text != null) { |
| writer.append(text); |
| } |
| } |
| } |