Mercurial > jdk8-mips64-public > langtools / file comparison
comparison: src/share/classes/com/sun/source/util/SourcePositions.java
src/share/classes/com/sun/source/util/SourcePositions.java
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| 1 /* | |
| 2 * Copyright 2005-2006 Sun Microsystems, Inc. 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. Sun designates this | |
| 8 * particular file as subject to the "Classpath" exception as provided | |
| 9 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 22 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 23 * have any questions. | |
| 24 */ | |
| 25 | |
| 26 package com.sun.source.util; | |
| 27 | |
| 28 import com.sun.source.tree.*; | |
| 29 | |
| 30 /** | |
| 31 * Provides methods to obtain the position of a Tree within a CompilationUnit. | |
| 32 * A position is defined as a simple character offset from the start of a | |
| 33 * CompilationUnit where the first character is at offset 0. | |
| 34 * | |
| 35 * @author Peter von der Ahé | |
| 36 * @since 1.6 | |
| 37 */ | |
| 38 public interface SourcePositions { | |
| 39 | |
| 40 /** | |
| 41 * Gets the starting position of tree within file. If tree is not found within | |
| 42 * file, or if the starting position is not available, | |
| 43 * return {@link javax.tools.Diagnostic#NOPOS}. | |
| 44 * The returned position must be at the start of the yield of this tree, that | |
| 45 * is for any sub-tree of this tree, the following must hold: | |
| 46 * | |
| 47 * <p> | |
| 48 * {@code tree.getStartPosition() <= subtree.getStartPosition()} or <br> | |
| 49 * {@code tree.getStartPosition() == NOPOS} or <br> | |
| 50 * {@code subtree.getStartPosition() == NOPOS} | |
| 51 * </p> | |
| 52 * | |
| 53 * @param file CompilationUnit in which to find tree. | |
| 54 * @param tree tree for which a position is sought. | |
| 55 * @return the start position of tree. | |
| 56 */ | |
| 57 long getStartPosition(CompilationUnitTree file, Tree tree); | |
| 58 | |
| 59 /** | |
| 60 * Gets the ending position of tree within file. If tree is not found within | |
| 61 * file, or if the starting position is not available, | |
| 62 * return {@link javax.tools.Diagnostic#NOPOS}. | |
| 63 * The returned position must be at the end of the yield of this tree, | |
| 64 * that is for any sub-tree of this tree, the following must hold: | |
| 65 * | |
| 66 * <p> | |
| 67 * {@code tree.getEndPosition() >= subtree.getEndPosition()} or <br> | |
| 68 * {@code tree.getEndPosition() == NOPOS} or <br> | |
| 69 * {@code subtree.getEndPosition() == NOPOS} | |
| 70 * </p> | |
| 71 * | |
| 72 * In addition, the following must hold: | |
| 73 * | |
| 74 * <p> | |
| 75 * {@code tree.getStartPosition() <= tree.getEndPosition()} or <br> | |
| 76 * {@code tree.getStartPosition() == NOPOS} or <br> | |
| 77 * {@code tree.getEndPosition() == NOPOS} | |
| 78 * </p> | |
| 79 * | |
| 80 * @param file CompilationUnit in which to find tree. | |
| 81 * @param tree tree for which a position is sought. | |
| 82 * @return the end position of tree. | |
| 83 */ | |
| 84 long getEndPosition(CompilationUnitTree file, Tree tree); | |
| 85 | |
| 86 } |
