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Copy pathindex.ts
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487 lines (465 loc) · 14.2 KB
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import {
CharStream,
CommonTokenStream,
ParseTreeWalker,
type ParseTree,
} from 'antlr4';
import {
createApiFile,
createImportResolver,
useStructEditor,
type ApiFile,
type ClassMemberParam,
type Nullability,
} from '../share.ts';
import JavaLexer from './JavaLexer.ts';
import JavaParser, {
AnnotationContext,
ClassBodyDeclarationContext,
ClassOrInterfaceModifierContext,
FormalParameterContext,
FormalParameterListContext,
InterfaceBodyDeclarationContext,
InterfaceMethodDeclarationContext,
ModifierContext,
ReceiverParameterContext,
TypeDeclarationContext,
TypeTypeContext,
} from './JavaParser.ts';
import JavaListener from './JavaParserListener.ts';
const nullableAnnotationNames = new Set(['nullable', 'recentlynullable']);
const nonNullAnnotationNames = new Set([
'nonnull',
'notnull',
'recentlynonnull',
]);
const primitiveTypeNames = new Set([
'boolean',
'byte',
'char',
'double',
'float',
'int',
'long',
'short',
'void',
]);
const hideDocTagReg = /(^|[^A-Za-z0-9_$])@hide(?![A-Za-z0-9_$])/;
const commentTokenTypes = new Set([JavaLexer.COMMENT, JavaLexer.LINE_COMMENT]);
const getAnnotationName = (
annotation: AnnotationContext | null | undefined,
): string => {
return annotation?.qualifiedName().getText().split('.').at(-1) ?? '';
};
const getAnnotationNullability = (
annotations: (AnnotationContext | null | undefined)[],
): Nullability | undefined => {
const names = annotations.map((annotation) =>
getAnnotationName(annotation).toLowerCase(),
);
if (names.some((name) => nullableAnnotationNames.has(name))) {
return 'nullable';
}
if (names.some((name) => nonNullAnnotationNames.has(name))) {
return 'non-null';
}
};
const getSignatureAnnotationTexts = (
annotations: (AnnotationContext | null | undefined)[],
) => {
return annotations
.filter((annotation) => {
const name = getAnnotationName(annotation).toLowerCase();
return (
nullableAnnotationNames.has(name) || nonNullAnnotationNames.has(name)
);
})
.map((annotation) => annotation!.getText());
};
const getModifierAnnotations = (modifiers: ModifierContext[]) => {
return modifiers
.map((modifier) => modifier.classOrInterfaceModifier()?.annotation())
.filter((annotation) => !!annotation?.getText());
};
const getParent = (ctx: unknown): unknown => {
const value = ctx as { parentCtx?: unknown; parent?: unknown };
return value.parentCtx ?? value.parent;
};
const getDeclarationContext = (
ctx: unknown,
):
| ClassBodyDeclarationContext
| InterfaceBodyDeclarationContext
| TypeDeclarationContext
| undefined => {
let current = getParent(ctx);
while (current) {
if (
current instanceof ClassBodyDeclarationContext ||
current instanceof InterfaceBodyDeclarationContext ||
current instanceof TypeDeclarationContext
) {
return current;
}
current = getParent(current);
}
};
const hasHideDocTag = (ctx: unknown, tokens: CommonTokenStream): boolean => {
const declaration = getDeclarationContext(ctx);
if (!declaration) return false;
const hiddenTokens =
tokens.getHiddenTokensToLeft(declaration.start.tokenIndex) ?? [];
return hiddenTokens.some(
(token) =>
commentTokenTypes.has(token.type) && hideDocTagReg.test(token.text),
);
};
const getAncestorModifierAnnotations = (ctx: unknown) => {
let current = getParent(ctx);
while (current) {
if (
current instanceof ClassBodyDeclarationContext ||
current instanceof InterfaceBodyDeclarationContext
) {
return getModifierAnnotations(current.modifier_list());
}
current = getParent(current);
}
return [];
};
const getDeclarationModifiers = (
ctx: unknown,
): (ModifierContext | ClassOrInterfaceModifierContext)[] => {
let current = getParent(ctx);
while (current) {
if (
current instanceof ClassBodyDeclarationContext ||
current instanceof InterfaceBodyDeclarationContext
) {
return current.modifier_list();
}
if (current instanceof TypeDeclarationContext) {
return current.classOrInterfaceModifier_list();
}
current = getParent(current);
}
return [];
};
const hasAbstractModifier = (ctx: unknown) => {
return getDeclarationModifiers(ctx).some((modifier) => {
const classModifier =
modifier instanceof ModifierContext
? modifier.classOrInterfaceModifier()
: modifier;
return !!classModifier?.ABSTRACT();
});
};
const hasStaticModifier = (ctx: unknown) => {
return getDeclarationModifiers(ctx).some((modifier) => {
const classModifier =
modifier instanceof ModifierContext
? modifier.classOrInterfaceModifier()
: modifier;
return !!classModifier?.STATIC();
});
};
const getInterfaceMethodModifierAnnotations = (
ctx: InterfaceMethodDeclarationContext,
) => {
return ctx
.interfaceMethodModifier_list()
.map((modifier) => modifier.annotation())
.filter((annotation) => !!annotation?.getText());
};
const getJavaTypeText = (typeCtx: TypeTypeContext): string => {
let text = typeCtx.getText();
for (const annotation of typeCtx.annotation_list()) {
const annotationText = annotation.getText();
if (text.startsWith(annotationText)) {
text = text.substring(annotationText.length);
}
}
return text;
};
const getTypeNullability = (
typeText: string,
annotations: (AnnotationContext | null | undefined)[],
): Nullability | undefined => {
const annotationNullability = getAnnotationNullability(annotations);
if (annotationNullability) return annotationNullability;
return primitiveTypeNames.has(typeText) ? 'non-null' : undefined;
};
const getTypeInfo = (
typeCtx: TypeTypeContext,
annotations: (AnnotationContext | null | undefined)[] = [],
): { type: string; nullability?: Nullability } => {
const type = getJavaTypeText(typeCtx);
const nullability = getTypeNullability(type, [
...annotations,
...typeCtx.annotation_list(),
]);
return {
type,
...(nullability ? { nullability } : {}),
};
};
const getReturnTypeInfo = (
typeTypeOrVoid: ReturnType<JavaParser['typeTypeOrVoid']>,
annotations: (AnnotationContext | null | undefined)[] = [],
): { type: string; nullability?: Nullability } => {
const typeCtx = typeTypeOrVoid.typeType();
if (typeCtx) return getTypeInfo(typeCtx, annotations);
return {
type: typeTypeOrVoid.getText(),
nullability: 'non-null',
};
};
const getFormalParameterAnnotations = (ctx: FormalParameterContext) => {
return [
...ctx
.variableModifier_list()
.map((modifier) => modifier.annotation())
.filter((annotation) => !!annotation?.getText()),
...ctx.annotation_list(),
];
};
const getParamList = (
nodes: ParseTree[] | undefined | null,
resolveImports: ReturnType<typeof createImportResolver>,
memberImports: Set<number>,
): ClassMemberParam[] => {
if (!nodes?.length) return [];
return nodes
.flatMap((node): ClassMemberParam[] => {
if (node instanceof ReceiverParameterContext) {
const typeCtx = node.typeType();
const { type, nullability } = getTypeInfo(typeCtx);
resolveImports([
type,
...getSignatureAnnotationTexts(typeCtx.annotation_list()),
]).forEach((index) => memberImports.add(index));
return [{ type, ...(nullability ? { nullability } : {}) }];
}
if (node instanceof FormalParameterContext) {
const annotations = getFormalParameterAnnotations(node);
const typeCtx = node.typeType();
const { type, nullability } = getTypeInfo(typeCtx, annotations);
resolveImports([
type,
...getSignatureAnnotationTexts([
...annotations,
...typeCtx.annotation_list(),
]),
]).forEach((index) => memberImports.add(index));
return [
{
name: node.variableDeclaratorId().identifier().getText(),
type,
...(nullability ? { nullability } : {}),
},
];
}
if (node instanceof FormalParameterListContext) {
return getParamList(node.children, resolveImports, memberImports);
}
return [];
})
.filter((param) => !!param.type);
};
const toMethodType = (parameters: ClassMemberParam[], returnType: string) => {
return `(${parameters.map((param) => param.type).join(', ')}) -> ${returnType}`;
};
const getQualifiedNameTail = (name: string) => {
return name.split('.').at(-1) ?? name;
};
export const parseJavaFile = (text: string): ApiFile => {
const chars = new CharStream(text);
const lexer = new JavaLexer(chars);
const tokens = new CommonTokenStream(lexer);
const parser = new JavaParser(tokens);
const result = parser.compilationUnit();
if (result.exception) {
throw result.exception;
}
const packageName =
result.packageDeclaration()?.qualifiedName().getText() ?? '';
const sourceImports = result.importDeclaration_list().map((ctx) => {
return `${ctx.STATIC() ? 'static ' : ''}${ctx.qualifiedName().getText()}${
ctx.MUL() ? '.*' : ''
}`;
});
const resolveImports = createImportResolver(sourceImports);
const listener = new JavaListener();
const { addMember, enterStruct, exitStruct, structs, clearUseless } =
useStructEditor();
listener.enterClassDeclaration = (ctx) => {
enterStruct(
ctx.identifier().getText(),
ctx.identifier().start.line,
'class',
hasAbstractModifier(ctx),
hasHideDocTag(ctx, tokens),
);
};
listener.exitClassDeclaration = exitStruct;
listener.enterConstructorDeclaration = (ctx) => {
const id = ctx.identifier();
const name = id.getText();
const memberImports = new Set<number>();
const parameters = getParamList(
ctx.formalParameters().children,
resolveImports,
memberImports,
);
addMember({
kind: 'constructor',
name,
type: toMethodType(parameters, name),
loc: id.start.line,
imports: Array.from(memberImports).sort((a, b) => a - b),
parameters,
parameterCount: parameters.length,
});
};
listener.enterMethodDeclaration = (ctx) => {
const id = ctx.identifier();
const name = id.getText();
const returnAnnotations = getAncestorModifierAnnotations(ctx);
const returnType = ctx.typeTypeOrVoid();
const returnInfo = getReturnTypeInfo(returnType, returnAnnotations);
const memberImports = new Set(
resolveImports([
returnInfo.type,
...getSignatureAnnotationTexts([
...returnAnnotations,
...(returnType.typeType()?.annotation_list() ?? []),
]),
]),
);
const parameters = getParamList(
ctx.formalParameters().children,
resolveImports,
memberImports,
);
addMember({
kind: 'method',
name,
type: toMethodType(parameters, returnInfo.type),
loc: id.start.line,
imports: Array.from(memberImports).sort((a, b) => a - b),
...(hasAbstractModifier(ctx) ? { isAbstract: true } : {}),
returnType: returnInfo.type,
...(returnInfo.nullability
? { returnNullability: returnInfo.nullability }
: {}),
parameters,
parameterCount: parameters.length,
});
};
listener.enterFieldDeclaration = (ctx) => {
const id = ctx
.variableDeclarators()
.variableDeclarator(0)
.variableDeclaratorId()
.identifier();
const name = id.getText();
const annotations = getAncestorModifierAnnotations(ctx);
const typeCtx = ctx.typeType();
const typeInfo = getTypeInfo(typeCtx, annotations);
addMember({
kind: 'field',
name,
type: typeInfo.type,
loc: id.start.line,
imports: resolveImports([
typeInfo.type,
...getSignatureAnnotationTexts([
...annotations,
...typeCtx.annotation_list(),
]),
]),
...(hasStaticModifier(ctx) ? { isStatic: true } : {}),
...(typeInfo.nullability
? { fieldNullability: typeInfo.nullability }
: {}),
});
};
listener.enterInterfaceDeclaration = (ctx) => {
enterStruct(
ctx.identifier().getText(),
ctx.identifier().start.line,
'interface',
false,
hasHideDocTag(ctx, tokens),
);
};
listener.exitInterfaceDeclaration = exitStruct;
listener.enterInterfaceMethodDeclaration = (ctx) => {
const b = ctx.interfaceCommonBodyDeclaration();
const id = b.identifier();
const name = id.getText();
const returnAnnotations = [
...getAncestorModifierAnnotations(ctx),
...getInterfaceMethodModifierAnnotations(ctx),
...b.annotation_list(),
];
const returnType = b.typeTypeOrVoid();
const returnInfo = getReturnTypeInfo(returnType, returnAnnotations);
const memberImports = new Set(
resolveImports([
returnInfo.type,
...getSignatureAnnotationTexts([
...returnAnnotations,
...(returnType.typeType()?.annotation_list() ?? []),
]),
]),
);
const parameters = getParamList(
b.formalParameters().children,
resolveImports,
memberImports,
);
addMember({
kind: 'method',
name,
type: toMethodType(parameters, returnInfo.type),
loc: id.start.line,
imports: Array.from(memberImports).sort((a, b) => a - b),
returnType: returnInfo.type,
...(returnInfo.nullability
? { returnNullability: returnInfo.nullability }
: {}),
parameters,
parameterCount: parameters.length,
});
};
listener.enterConstDeclaration = (ctx) => {
const id = ctx.constantDeclarator(0).identifier();
const name = id.getText();
const annotations = getAncestorModifierAnnotations(ctx);
const typeCtx = ctx.typeType();
const typeInfo = getTypeInfo(typeCtx, annotations);
addMember({
kind: 'constant',
name,
type: typeInfo.type,
loc: id.start.line,
imports: resolveImports([
typeInfo.type,
...getSignatureAnnotationTexts([
...annotations,
...typeCtx.annotation_list(),
]),
]),
...(typeInfo.nullability
? { fieldNullability: typeInfo.nullability }
: {}),
});
};
ParseTreeWalker.DEFAULT.walk(listener, result);
clearUseless();
for (const struct of structs) {
struct.name = getQualifiedNameTail(struct.name);
}
return createApiFile(packageName, sourceImports, structs);
};