| 1 | /* |
|---|---|
| 2 | * Copyright (C) 2007-2010 Júlio Vilmar Gesser. |
| 3 | * Copyright (C) 2011, 2013-2020 The JavaParser Team. |
| 4 | * |
| 5 | * This file is part of JavaParser. |
| 6 | * |
| 7 | * JavaParser can be used either under the terms of |
| 8 | * a) the GNU Lesser General Public License as published by |
| 9 | * the Free Software Foundation, either version 3 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * b) the terms of the Apache License |
| 12 | * |
| 13 | * You should have received a copy of both licenses in LICENCE.LGPL and |
| 14 | * LICENCE.APACHE. Please refer to those files for details. |
| 15 | * |
| 16 | * JavaParser is distributed in the hope that it will be useful, |
| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 19 | * GNU Lesser General Public License for more details. |
| 20 | */ |
| 21 | |
| 22 | package com.github.javaparser; |
| 23 | |
| 24 | import java.util.Iterator; |
| 25 | import java.util.Optional; |
| 26 | |
| 27 | import static com.github.javaparser.utils.Utils.assertNotNull; |
| 28 | |
| 29 | /** |
| 30 | * The range of tokens covered by this node. |
| 31 | */ |
| 32 | public class TokenRange implements Iterable<JavaToken> { |
| 33 | public static final TokenRange INVALID = new TokenRange(JavaToken.INVALID, JavaToken.INVALID); |
| 34 | |
| 35 | private final JavaToken begin; |
| 36 | private final JavaToken end; |
| 37 | |
| 38 | public TokenRange(JavaToken begin, JavaToken end) { |
| 39 | this.begin = assertNotNull(begin); |
| 40 | this.end = assertNotNull(end); |
| 41 | } |
| 42 | |
| 43 | public JavaToken getBegin() { |
| 44 | return begin; |
| 45 | } |
| 46 | |
| 47 | public JavaToken getEnd() { |
| 48 | return end; |
| 49 | } |
| 50 | |
| 51 | public Optional<Range> toRange() { |
| 52 | if (begin.getRange().isPresent() && end.getRange().isPresent()) { |
| 53 | return Optional.of(new Range(begin.getRange().get().begin, end.getRange().get().end)); |
| 54 | } |
| 55 | return Optional.empty(); |
| 56 | } |
| 57 | |
| 58 | public TokenRange withBegin(JavaToken begin) { |
| 59 | return new TokenRange(assertNotNull(begin), end); |
| 60 | } |
| 61 | |
| 62 | public TokenRange withEnd(JavaToken end) { |
| 63 | return new TokenRange(begin, assertNotNull(end)); |
| 64 | } |
| 65 | |
| 66 | @Override |
| 67 | public String toString() { |
| 68 | StringBuilder result = new StringBuilder(); |
| 69 | for(JavaToken t: this) { |
| 70 | result.append(t.getText()); |
| 71 | } |
| 72 | return result.toString(); |
| 73 | } |
| 74 | |
| 75 | @Override |
| 76 | public Iterator<JavaToken> iterator() { |
| 77 | return new Iterator<JavaToken>() { |
| 78 | private boolean hasNext = true; |
| 79 | private JavaToken current = begin; |
| 80 | |
| 81 | @Override |
| 82 | public boolean hasNext() { |
| 83 | return hasNext; |
| 84 | } |
| 85 | |
| 86 | @Override |
| 87 | public JavaToken next() { |
| 88 | JavaToken retval = current; |
| 89 | if(current == null){ |
| 90 | throw new IllegalStateException("Attempting to move past end of range."); |
| 91 | } |
| 92 | if (current == end) { |
| 93 | hasNext = false; |
| 94 | } |
| 95 | current = current.getNextToken().orElse(null); |
| 96 | if(current == null && hasNext){ |
| 97 | throw new IllegalStateException("End token is not linked to begin token."); |
| 98 | } |
| 99 | return retval; |
| 100 | } |
| 101 | }; |
| 102 | } |
| 103 | } |
| 104 |
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