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Add 'getAutoCreateAutomaticModules' option
Resolves #74
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src/main/java/org/gradlex/javamodule/moduleinfo/AutomaticModuleNameUtil.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,153 @@ | ||
| package org.gradlex.javamodule.moduleinfo; | ||
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| import java.io.File; | ||
| import java.util.Arrays; | ||
| import java.util.List; | ||
| import java.util.regex.Matcher; | ||
| import java.util.regex.Pattern; | ||
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| /** | ||
| * Implementation based on 'jdk.internal.module.ModulePath#deriveModuleDescriptor' and related methods. | ||
| */ | ||
| class AutomaticModuleNameUtil { | ||
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| private static final Pattern DASH_VERSION = Pattern.compile("-(\\d+(\\.|$))"); | ||
| private static final Pattern NON_ALPHANUM = Pattern.compile("[^A-Za-z0-9]"); | ||
| private static final Pattern REPEATING_DOTS = Pattern.compile("(\\.)(\\1)+"); | ||
| private static final Pattern LEADING_DOTS = Pattern.compile("^\\."); | ||
| private static final Pattern TRAILING_DOTS = Pattern.compile("\\.$"); | ||
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| static String automaticModulNameFromFileName(File jarFile) { | ||
| // Derive the version, and the module name if needed, from JAR file name | ||
| String fn = jarFile.getName(); | ||
| int i = fn.lastIndexOf(File.separator); | ||
| if (i != -1) | ||
| fn = fn.substring(i + 1); | ||
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| // drop ".jar" | ||
| String name = fn.substring(0, fn.length() - 4); | ||
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| // find first occurrence of -${NUMBER}. or -${NUMBER}$ | ||
| Matcher matcher = DASH_VERSION.matcher(name); | ||
| if (matcher.find()) { | ||
| name = name.substring(0, matcher.start()); | ||
| } | ||
| return checkValidModuleName(cleanModuleName(name)); | ||
| } | ||
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| private static String cleanModuleName(String mn) { | ||
| // replace non-alphanumeric | ||
| mn = NON_ALPHANUM.matcher(mn).replaceAll("."); | ||
|
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| // collapse repeating dots | ||
| mn = REPEATING_DOTS.matcher(mn).replaceAll("."); | ||
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| // drop leading dots | ||
| if (!mn.isEmpty() && mn.charAt(0) == '.') | ||
| mn = LEADING_DOTS.matcher(mn).replaceAll(""); | ||
|
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| // drop trailing dots | ||
| int len = mn.length(); | ||
| if (len > 0 && mn.charAt(len-1) == '.') | ||
| mn = TRAILING_DOTS.matcher(mn).replaceAll(""); | ||
|
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| return mn; | ||
| } | ||
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| public static String checkValidModuleName(String name) { | ||
| int next; | ||
| int off = 0; | ||
| while ((next = name.indexOf('.', off)) != -1) { | ||
| String id = name.substring(off, next); | ||
| if (!isJavaIdentifier(id)) { | ||
| throw new IllegalArgumentException(name + ": Invalid module name" | ||
| + ": '" + id + "' is not a Java identifier"); | ||
| } | ||
| off = next+1; | ||
| } | ||
| String last = name.substring(off); | ||
| if (!isJavaIdentifier(last)) { | ||
| throw new IllegalArgumentException(name + ": Invalid module name" | ||
| + ": '" + last + "' is not a Java identifier"); | ||
| } | ||
| return name; | ||
| } | ||
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| @SuppressWarnings("BooleanMethodIsAlwaysInverted") | ||
| private static boolean isJavaIdentifier(String str) { | ||
| if (str.isEmpty() || RESERVED.contains(str)) | ||
| return false; | ||
|
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| int first = Character.codePointAt(str, 0); | ||
| if (!Character.isJavaIdentifierStart(first)) | ||
| return false; | ||
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| int i = Character.charCount(first); | ||
| while (i < str.length()) { | ||
| int cp = Character.codePointAt(str, i); | ||
| if (!Character.isJavaIdentifierPart(cp)) | ||
| return false; | ||
| i += Character.charCount(cp); | ||
| } | ||
|
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| return true; | ||
| } | ||
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| // keywords, boolean and null literals, not allowed in identifiers | ||
| private static final List<String> RESERVED = Arrays.asList( | ||
| "abstract", | ||
| "assert", | ||
| "boolean", | ||
| "break", | ||
| "byte", | ||
| "case", | ||
| "catch", | ||
| "char", | ||
| "class", | ||
| "const", | ||
| "continue", | ||
| "default", | ||
| "do", | ||
| "double", | ||
| "else", | ||
| "enum", | ||
| "extends", | ||
| "final", | ||
| "finally", | ||
| "float", | ||
| "for", | ||
| "goto", | ||
| "if", | ||
| "implements", | ||
| "import", | ||
| "instanceof", | ||
| "int", | ||
| "interface", | ||
| "long", | ||
| "native", | ||
| "new", | ||
| "package", | ||
| "private", | ||
| "protected", | ||
| "public", | ||
| "return", | ||
| "short", | ||
| "static", | ||
| "strictfp", | ||
| "super", | ||
| "switch", | ||
| "synchronized", | ||
| "this", | ||
| "throw", | ||
| "throws", | ||
| "transient", | ||
| "try", | ||
| "void", | ||
| "volatile", | ||
| "while", | ||
| "true", | ||
| "false", | ||
| "null", | ||
| "_" | ||
| ); | ||
| } |
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