Java example source code file (Option.java)

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Java - Java tags/keywords

attributeset, option, serializable, string, text

The Option.java Java example source code

/*
 * Copyright (c) 1998, 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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 General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */
package javax.swing.text.html;

import java.io.Serializable;
import javax.swing.text.*;

/**
 * Value for the ListModel used to represent
 * <option> elements.  This is the object
 * installed as items of the DefaultComboBoxModel
 * used to represent the <select> element.
 * <p>
 * <strong>Warning:
 * Serialized objects of this class will not be compatible with
 * future Swing releases. The current serialization support is
 * appropriate for short term storage or RMI between applications running
 * the same version of Swing.  As of 1.4, support for long term storage
 * of all JavaBeans™
 * has been added to the <code>java.beans package.
 * Please see {@link java.beans.XMLEncoder}.
 *
 * @author  Timothy Prinzing
 */
public class Option implements Serializable {

    /**
     * Creates a new Option object.
     *
     * @param attr the attributes associated with the
     *  option element.  The attributes are copied to
     *  ensure they won't change.
     */
    public Option(AttributeSet attr) {
        this.attr = attr.copyAttributes();
        selected = (attr.getAttribute(HTML.Attribute.SELECTED) != null);
    }

    /**
     * Sets the label to be used for the option.
     */
    public void setLabel(String label) {
        this.label = label;
    }

    /**
     * Fetch the label associated with the option.
     */
    public String getLabel() {
        return label;
    }

    /**
     * Fetch the attributes associated with this option.
     */
    public AttributeSet getAttributes() {
        return attr;
    }

    /**
     * String representation is the label.
     */
    public String toString() {
        return label;
    }

    /**
     * Sets the selected state.
     */
    protected void setSelection(boolean state) {
        selected = state;
    }

    /**
     * Fetches the selection state associated with this option.
     */
    public boolean isSelected() {
        return selected;
    }

    /**
     * Convenience method to return the string associated
     * with the <code>value attribute.  If the
     * value has not been specified, the label will be
     * returned.
     */
    public String getValue() {
        String value = (String) attr.getAttribute(HTML.Attribute.VALUE);
        if (value == null) {
            value = label;
        }
        return value;
    }

    private boolean selected;
    private String label;
    private AttributeSet attr;
}