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Java > Open Source Codes > MyLexer


1
2 /*
3  * Copyright © 2002 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
4  * California 95054, U.S.A. All rights reserved. Sun Microsystems, Inc. has
5  * intellectual property rights relating to technology embodied in the product
6  * that is described in this document. In particular, and without limitation,
7  * these intellectual property rights may include one or more of the U.S.
8  * patents listed at http://www.sun.com/patents and one or more additional
9  * patents or pending patent applications in the U.S. and in other countries.
10  * U.S. Government Rights - Commercial software. Government users are subject
11  * to the Sun Microsystems, Inc. standard license agreement and applicable
12  * provisions of the FAR and its supplements. Use is subject to license terms.
13  * Sun, Sun Microsystems, the Sun logo and Java are trademarks or registered
14  * trademarks of Sun Microsystems, Inc. in the U.S. and other countries. This
15  * product is covered and controlled by U.S. Export Control laws and may be
16  * subject to the export or import laws in other countries. Nuclear, missile,
17  * chemical biological weapons or nuclear maritime end uses or end users,
18  * whether direct or indirect, are strictly prohibited. Export or reexport
19  * to countries subject to U.S. embargo or to entities identified on U.S.
20  * export exclusion lists, including, but not limited to, the denied persons
21  * and specially designated nationals lists is strictly prohibited.
22  */
23
24
25
26 /**
27  * A subclass of CalcInputTokenManager so that we can do better error reporting
28  * via the GUI object.
29  */
30 class MyLexer extends CalcInputParserTokenManager {
31
32    /**
33     * We redefined the lexical error reporting function so that it beeps
34     * and displays a messgae thru the GUI.
35     */
36    protected void LexicalError() {
37      CalcGUI.Error("ERROR (click 0)");
38      ReInit(gui.getCollector(), OPERAND);
39      result = 0.0;
40    }
41
42    public MyLexer(CalcGUI guiObj)
43    {
44       super(guiObj.getCollector(), OPERAND);
45       gui = guiObj;
46    }
47 }
48
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