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What this is

This file is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

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The source code

/*
 *                 Sun Public License Notice
 * 
 * The contents of this file are subject to the Sun Public License
 * Version 1.0 (the "License"). You may not use this file except in
 * compliance with the License. A copy of the License is available at
 * http://www.sun.com/
 * 
 * The Original Code is NetBeans. The Initial Developer of the Original
 * Code is Sun Microsystems, Inc. Portions Copyright 1997-2003 Sun
 * Microsystems, Inc. All Rights Reserved.
 */

package org.netbeans.beaninfo.editors;

import java.text.MessageFormat;
import org.openide.ErrorManager;

import org.openide.util.Lookup;
import org.openide.util.NbBundle;

/** A property editor for Class.
* @author   Jan Jancura
*/
public class ClassEditor extends java.beans.PropertyEditorSupport {

    /**
     * This method is intended for use when generating Java code to set
     * the value of the property.  It should return a fragment of Java code
     * that can be used to initialize a variable with the current property
     * value.
     * 

* Example results are "2", "new Color(127,127,34)", "Color.orange", etc. * * @return A fragment of Java code representing an initializer for the * current value. */ public String getJavaInitializationString() { Class clazz = (Class)getValue(); if (clazz == null) return "null"; // NOI18N return "Class.forName (\"" + clazz.getName () + "\")"; // NOI18N } //---------------------------------------------------------------------- /** * @return The property value as a human editable string. *

Returns null if the value can't be expressed as an editable string. *

If a non-null value is returned, then the PropertyEditor should * be prepared to parse that string back in setAsText(). */ public String getAsText() { Class clazz = (Class)getValue(); if (clazz == null) return "null"; // NOI18N return clazz.getName (); } /** Set the property value by parsing a given String. May raise * java.lang.IllegalArgumentException if either the String is * badly formatted or if this kind of property can't be expressed * as text. * @param text The string to be parsed. */ public void setAsText(String text) throws java.lang.IllegalArgumentException { try { ClassLoader loader = (ClassLoader)Lookup.getDefault().lookup(ClassLoader.class); setValue (loader.loadClass (text)); } catch (ClassNotFoundException e) { IllegalArgumentException iae = new IllegalArgumentException (e.getMessage()); String msg = MessageFormat.format( NbBundle.getMessage( ClassEditor.class, "FMT_EXC_CANT_LOAD_CLASS"), new Object[] {text}); //NOI18N ErrorManager.getDefault().annotate(iae, ErrorManager.USER, e.getMessage(), msg, e, new java.util.Date()); throw iae; } } }

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