1 /* 2 * Copyright (c) 2008, 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package com.sun.scenario.effect.compiler.lexer; 27 28 import com.sun.scenario.effect.compiler.JSLLexer; 29 import org.antlr.runtime.ANTLRStringStream; 30 import org.antlr.runtime.Token; 31 32 import static org.junit.Assert.*; 33 34 public abstract class LexerBase { 35 36 protected void assertRangeOfCharactersRecognized(char low, char high) 37 throws Exception { 38 39 for (char ch = low; ch <= high; ++ch) { 40 assertRecognized(ch); 41 } 42 } 43 44 protected void recognizeRange(char low, char high) throws Exception { 45 for (char ch = low; ch <= high; ++ch) { 46 recognize(ch); 47 } 48 } 49 50 protected void assertRecognized(char ch) throws Exception { 51 assertRecognized(String.valueOf(ch)); 52 } 53 54 protected Token recognize(char ch) throws Exception { 55 return recognize(String.valueOf(ch)); 56 } 57 58 protected void assertRecognized(String text) throws Exception { 59 Token token = recognize(text); 60 assertEquals(text, token.getText()); 61 62 if (expectedTokenType() != Integer.MIN_VALUE) { 63 assertEquals(expectedTokenType(), token.getType()); 64 } 65 } 66 67 protected Token recognize(String text) throws Exception { 68 JSLLexer lexer = lexerOver(text); 69 fireLexerRule(lexer); 70 lexer = lexerOver(text); 71 return lexer.nextToken(); 72 } 73 74 private JSLLexer lexerOver(String text) { 75 JSLLexer lexer = new JSLLexer(); 76 lexer.setCharStream(new ANTLRStringStream(text)); 77 return lexer; 78 } 79 80 protected abstract void fireLexerRule(JSLLexer lexer) throws Exception; 81 82 protected int expectedTokenType() { 83 return Integer.MIN_VALUE; 84 } 85 }