DhcptabNameField.java revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* ident "%Z%%M% %I% %E% SMI"
*
* Copyright (c) 1999-2001 by Sun Microsystems, Inc.
* All rights reserved.
*/
package com.sun.dhcpmgr.client;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.text.*;
/**
* A text field which enforces the syntax rules for the name field in the
* dhcptab. At present, all characters must be printable ASCII, but not the
* comment introduction character '#'.
*/
public class DhcptabNameField extends JTextField {
/**
* Constructs a field initialized to the provided text. Defaults to
* 20 characters wide.
* @param text the text to display initially
*/
public DhcptabNameField(String text) {
this(text, 20);
}
/**
* Constructs a field initialized to the provided text with the requested
* size.
* @param text the text to display initially
* @param length the length in characters the field should size itself to
*/
public DhcptabNameField(String text, int length) {
super(text, length);
}
protected Document createDefaultModel() {
return new DhcptabNameDocument();
}
}
/**
* This is the recommended way to validate input, as opposed to trapping
* KeyEvents because this will actually catch paste operations as well.
*/
class DhcptabNameDocument extends PlainDocument {
public void insertString(int offs, String str, AttributeSet a)
throws BadLocationException {
if (str != null) {
char [] chars = str.toCharArray();
for (int i = 0; i < chars.length; ++i) {
// Must be a printable ASCII char, but not the comment character
if (chars[i] < ' ' || chars[i] > '~' || chars[i] == '#') {
throw new BadLocationException("", offs);
}
}
}
super.insertString(offs, str, a);
}
}