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annotate graal/com.oracle.max.base/src/com/sun/max/program/ClassSearch.java @ 4142:bc8527f3071c

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Adjust code base to new level of warnings.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Sun, 18 Dec 2011 05:24:06 +0100
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1 /*
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2 * Copyright (c) 2007, 2011, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.sun.max.program;
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24
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25 import java.io.*;
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26 import java.util.*;
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27 import java.util.zip.*;
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28
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29 import com.sun.max.lang.*;
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30
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31 /**
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32 * Provides a facility for finding classes reachable on a given {@linkplain Classpath classpath}.
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33 */
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34 public class ClassSearch extends ClasspathTraversal {
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35
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36 private final HashSet<String> classes;
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37
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38 public ClassSearch() {
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39 this(false);
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40 }
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41
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42 /**
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43 * Creates a class search object.
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44 *
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45 * @param omitDuplicates if true, then each argument passed to {@link #visitClass(String)} is guaranteed to be unique.
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46 */
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47 public ClassSearch(boolean omitDuplicates) {
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48 if (omitDuplicates) {
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49 classes = new HashSet<>();
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50 } else {
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51 classes = null;
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52 }
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53 }
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54
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55 /**
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56 * Handles a class file encountered during the traversal.
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57 *
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58 * @param className
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59 * the name of the class denoted by the class file
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60 * @return true if the traversal should continue, false if it should terminate
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61 */
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62 protected boolean visitClass(String className) {
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63 return true;
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64 }
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65
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66 /**
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67 * Handles a class file encountered during the traversal. Unless this object was initialized to omit duplicates,
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68 * this method may be called more than once for the same class as class files are not guaranteed to be unique in a
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69 * classpath.
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70 *
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71 * @param isArchiveEntry true if the class is in a .zip or .jar file, false if it is a file in a directory
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72 * @param className the name of the class denoted by the class file
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73 * @return true if the traversal should continue, false if it should terminate
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74 */
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75 protected boolean visitClass(boolean isArchiveEntry, String className) {
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76 if (classes != null) {
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77 if (classes.contains(className)) {
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78 return true;
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79 }
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80 classes.add(className);
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81 }
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82 return visitClass(className);
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83 }
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84
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85 protected boolean visit(boolean isArchiveEntry, String dottifiedResource) {
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86 if (dottifiedResource.endsWith(".class")) {
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87 final String className = Strings.chopSuffix(dottifiedResource, ".class");
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88 return visitClass(isArchiveEntry, className);
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89 }
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90 return true;
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91 }
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92
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93 @Override
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94 protected boolean visitArchiveEntry(ZipFile archive, ZipEntry resource) {
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95 return visit(true, resource.getName().replace('/', '.'));
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96 }
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97
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98 @Override
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99 protected boolean visitFile(File parent, String resource) {
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100 return visit(false, resource.replace(File.separatorChar, '.'));
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101 }
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102 }