| /******************************************************************************* |
| * Copyright (c) 2008, 2012 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.bpel.ui.editors.xpath.rules; |
| |
| import org.eclipse.jface.text.rules.ICharacterScanner; |
| import org.eclipse.jface.text.rules.IRule; |
| import org.eclipse.jface.text.rules.IToken; |
| import org.eclipse.jface.text.rules.Token; |
| |
| /** |
| * A rule for recognizing a sequence of characters, whatever that |
| * might be ... |
| * |
| * @author Michal Chmielewski (michal.chmielewski@oracle.com) |
| * @date Nov 17, 2006 |
| */ |
| |
| public class StringRule implements IRule { |
| |
| IToken fToken; |
| |
| String fSequence; |
| |
| /** |
| * Return a brand new shiny String Rule ... |
| * |
| * @param token |
| * @param sequence |
| */ |
| |
| public StringRule(IToken token, String sequence) { |
| assert token != null; |
| fToken = token; |
| assert sequence != null; |
| fSequence = sequence; |
| } |
| |
| /** |
| * |
| * @see org.eclipse.jface.text.rules.IRule#evaluate(org.eclipse.jface.text.rules.ICharacterScanner) |
| */ |
| public IToken evaluate(ICharacterScanner scanner) { |
| int cnt = 0; |
| |
| for (int i = 0, j = fSequence.length(); i < j; i++) { |
| |
| int ch = scanner.read(); |
| cnt += 1; |
| |
| if (ch != fSequence.charAt(i)) { |
| // |
| for (int x = 0; x < cnt; x++) { |
| scanner.unread(); |
| } |
| return Token.UNDEFINED; |
| } |
| } |
| |
| return fToken; |
| } |
| } |