| /******************************************************************************* |
| * Copyright (c) 2000, 2003 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Common Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/cpl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.jface.text.rules; |
| |
| import org.eclipse.jface.text.Assert; |
| |
| |
| /** |
| * Standard implementation of <code>IToken</code>. |
| */ |
| public class Token implements IToken { |
| |
| /** Internal token type: Undefined */ |
| private static final int T_UNDEFINED= 0; |
| /** Internal token type: EOF */ |
| private static final int T_EOF= 1; |
| /** Internal token type: Whitespace */ |
| private static final int T_WHITESPACE= 2; |
| /** Internal token type: Others */ |
| private static final int T_OTHER= 3; |
| |
| |
| /** |
| * Standard token: Undefined. |
| */ |
| public static final IToken UNDEFINED= new Token(T_UNDEFINED); |
| /** |
| * Standard token: End Of File. |
| */ |
| public static final IToken EOF= new Token(T_EOF); |
| /** |
| * Standard token: Whitespace. |
| */ |
| public static final IToken WHITESPACE= new Token(T_WHITESPACE); |
| |
| /** |
| * Standard token: Neither Undefine, Whitespace, nor End Of File. |
| * @deprecated will be removed |
| */ |
| public static final IToken OTHER= new Token(T_OTHER); |
| |
| /** The type of this token */ |
| private int fType; |
| /** The data associated with this token */ |
| private Object fData; |
| |
| /** |
| * Creates a new token according to the given specification which does not |
| * have any data attached to it. |
| * |
| * @param type the type of the token |
| * @since 2.0 |
| */ |
| private Token(int type) { |
| fType= type; |
| fData= null; |
| } |
| |
| /** |
| * Creates a new token which represents neither undefined, whitespace, nor EOF. |
| * The newly created token has the given data attached to it. |
| * |
| * @param data the data attached to the newly created token |
| */ |
| public Token(Object data) { |
| fType= T_OTHER; |
| fData= data; |
| } |
| |
| /** |
| * Reinitializes the data of this token. The token may not represent |
| * undefined, whitepsace, or EOF. |
| * |
| * @param the data to be attached to the token |
| * @since 2.0 |
| */ |
| public void setData(Object data) { |
| Assert.isTrue(isOther()); |
| fData= data; |
| } |
| |
| /* |
| * @see IToken#getData() |
| */ |
| public Object getData() { |
| return fData; |
| } |
| |
| /* |
| * @see IToken#isOther() |
| */ |
| public boolean isOther() { |
| return (fType == T_OTHER); |
| } |
| |
| /* |
| * @see IToken#isEOF() |
| */ |
| public boolean isEOF() { |
| return (fType == T_EOF); |
| } |
| |
| /* |
| * @see IToken#isWhitespace() |
| */ |
| public boolean isWhitespace() { |
| return (fType == T_WHITESPACE); |
| } |
| |
| /* |
| * @see IToken#isUndefined() |
| */ |
| public boolean isUndefined() { |
| return (fType == T_UNDEFINED); |
| } |
| } |