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Generate a Java token kind enum with a mapping to the integer kinds.
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71 changes: 71 additions & 0 deletions
71
...nerators/src/main/java/com/github/javaparser/generator/core/other/TokenKindGenerator.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,71 @@ | ||
| package com.github.javaparser.generator.core.other; | ||
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| import com.github.javaparser.ast.CompilationUnit; | ||
| import com.github.javaparser.ast.Node; | ||
| import com.github.javaparser.ast.NodeList; | ||
| import com.github.javaparser.ast.body.BodyDeclaration; | ||
| import com.github.javaparser.ast.body.ClassOrInterfaceDeclaration; | ||
| import com.github.javaparser.ast.body.EnumConstantDeclaration; | ||
| import com.github.javaparser.ast.body.EnumDeclaration; | ||
| import com.github.javaparser.ast.expr.IntegerLiteralExpr; | ||
| import com.github.javaparser.ast.stmt.ReturnStmt; | ||
| import com.github.javaparser.ast.stmt.SwitchEntryStmt; | ||
| import com.github.javaparser.ast.stmt.SwitchStmt; | ||
| import com.github.javaparser.generator.Generator; | ||
| import com.github.javaparser.utils.Log; | ||
| import com.github.javaparser.utils.SourceRoot; | ||
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| /** | ||
| * Generates the TokenKind enum from {@link com.github.javaparser.GeneratedJavaParserConstants} | ||
| */ | ||
| public class TokenKindGenerator extends Generator { | ||
| private final SourceRoot generatedJavaCcSourceRoot; | ||
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| public TokenKindGenerator(SourceRoot sourceRoot, SourceRoot generatedJavaCcSourceRoot) { | ||
| super(sourceRoot); | ||
| this.generatedJavaCcSourceRoot = generatedJavaCcSourceRoot; | ||
| } | ||
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| @Override | ||
| public void generate() { | ||
| Log.info("Running %s", getClass().getSimpleName()); | ||
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| final CompilationUnit javaTokenCu = sourceRoot.parse("com.github.javaparser", "JavaToken.java"); | ||
| final ClassOrInterfaceDeclaration javaToken = javaTokenCu.getClassByName("JavaToken").orElseThrow(() -> new AssertionError("Can't find class in java file.")); | ||
| final EnumDeclaration kindEnum = javaToken.findFirst(EnumDeclaration.class, e -> e.getNameAsString().equals("Kind")).orElseThrow(() -> new AssertionError("Can't find class in java file.")); | ||
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| kindEnum.getEntries().clear(); | ||
| annotateGenerated(kindEnum); | ||
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| final SwitchStmt valueOfSwitch = kindEnum.findFirst(SwitchStmt.class).orElseThrow(() -> new AssertionError("Can't find valueOf switch.")); | ||
| valueOfSwitch.findAll(SwitchEntryStmt.class).stream().filter(e -> e.getLabel().isPresent()).forEach(Node::remove); | ||
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| final CompilationUnit constantsCu = generatedJavaCcSourceRoot.parse("com.github.javaparser", "GeneratedJavaParserConstants.java"); | ||
| final ClassOrInterfaceDeclaration constants = constantsCu.getInterfaceByName("GeneratedJavaParserConstants").orElseThrow(() -> new AssertionError("Can't find class in java file.")); | ||
| for (BodyDeclaration<?> member : constants.getMembers()) { | ||
| member.toFieldDeclaration() | ||
| .filter(field -> { | ||
| String javadoc = field.getJavadocComment().get().getContent(); | ||
| return javadoc.contains("RegularExpression Id") || javadoc.contains("End of File"); | ||
| }) | ||
| .map(field -> field.getVariable(0)) | ||
| .ifPresent(var -> { | ||
| final String name = var.getNameAsString(); | ||
| final IntegerLiteralExpr kind = var.getInitializer().get().asIntegerLiteralExpr(); | ||
| generateEnumEntry(kindEnum, name, kind); | ||
| generateValueOfEntry(valueOfSwitch, name, kind); | ||
| }); | ||
| } | ||
| } | ||
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| private void generateValueOfEntry(SwitchStmt valueOfSwitch, String name, IntegerLiteralExpr kind) { | ||
| final SwitchEntryStmt entry = new SwitchEntryStmt(kind, new NodeList<>(new ReturnStmt(name))); | ||
| valueOfSwitch.getEntries().addFirst(entry); | ||
| } | ||
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| private void generateEnumEntry(EnumDeclaration kindEnum, String name, IntegerLiteralExpr kind) { | ||
| final EnumConstantDeclaration enumEntry = new EnumConstantDeclaration(name); | ||
| enumEntry.getArguments().add(kind); | ||
| kindEnum.addEntry(enumEntry); | ||
| } | ||
| } |
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