本文整理了Java中com.sun.tools.javac.code.Types.asSuper()方法的一些代码示例，展示了Types.asSuper()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Types.asSuper()方法的具体详情如下：
包路径：com.sun.tools.javac.code.Types
类名称：Types
方法名：asSuper
[英]Return the (most specific) base type of t that starts with the given symbol. If none exists, return null.
[中]返回以给定符号开头的（最具体的）t基类型。如果不存在，则返回null。
代码示例来源：origin: google/error-prone
private static List<Type> typeArgsAsSuper(Type baseType, Type superType, VisitorState state) {
Type projectedType = state.getTypes().asSuper(baseType, superType.tsym);
if (projectedType != null) {
return projectedType.getTypeArguments();
}
return new ArrayList<>();
}代码示例来源：origin: google/error-prone
private static Type predicateType(Type type, VisitorState state) {
Symbol predicate = state.getSymbolFromString(java.util.function.Predicate.class.getName());
if (predicate == null) {
return null;
}
Type asPredicate = state.getTypes().asSuper(type, predicate);
if (asPredicate == null) {
return null;
}
return getOnlyElement(asPredicate.getTypeArguments(), null);
}代码示例来源：origin: google/error-prone
/**
* Extracts the appropriate type argument from a specific supertype of the given {@code type}.
* This handles the case when a subtype has different type arguments than the expected type. For
* example, {@code ClassToInstanceMap<T>} implements {@code Map<Class<? extends T>, T>}.
*
* @param type the (sub)type from which to extract the type argument
* @param superTypeSym the symbol of the supertype on which the type parameter is defined
* @param typeArgIndex the index of the type argument to extract from the supertype
* @param types the {@link Types} utility class from the {@link VisitorState}
* @return the type argument, if defined, or null otherwise
*/
@Nullable
protected static final Type extractTypeArgAsMemberOfSupertype(
Type type, Symbol superTypeSym, int typeArgIndex, Types types) {
Type collectionType = types.asSuper(type, superTypeSym);
if (collectionType == null) {
return null;
}
com.sun.tools.javac.util.List<Type> tyargs = collectionType.getTypeArguments();
if (tyargs.size() <= typeArgIndex) {
// Collection is raw, nothing we can do.
return null;
}
return tyargs.get(typeArgIndex);
}
}代码示例来源：origin: google/error-prone
private static boolean isVariableClassCreator(
VariableTree variableTree,
VisitorState state,
ClassType classType,
Symbol parcelableCreatorSymbol) {
Tree typeTree = variableTree.getType();
Type type = ASTHelpers.getType(typeTree);
Types types = state.getTypes();
Type superType = types.asSuper(type, parcelableCreatorSymbol);
if (superType == null) {
return false;
}
List<Type> typeArguments = superType.getTypeArguments();
if (typeArguments.isEmpty()) {
// raw creator
return true;
}
return ASTHelpers.isSubtype(classType, Iterables.getOnlyElement(typeArguments), state);
}
}代码示例来源：origin: google/error-prone
private static Type getComparableTypeArgument(ClassTree tree, VisitorState state) {
final Type comparable =
state
.getTypes()
.asSuper(ASTHelpers.getType(tree), state.getSymtab().comparableType.asElement());
if (comparable != null && !comparable.getTypeArguments().isEmpty()) {
return Iterables.getOnlyElement(comparable.getTypeArguments());
}
return null;
}
}代码示例来源：origin: google/error-prone
@Override
public boolean matches(Tree tree, VisitorState state) {
Symbol sym = state.getSymbolFromString(clazz);
if (sym == null) {
return false;
}
Type type = ASTHelpers.getType(tree);
if (!ASTHelpers.isSubtype(type, sym.type, state)) {
return false;
}
Types types = state.getTypes();
Type superType = types.asSuper(type, sym);
if (superType == null) {
return false;
}
List<Type> typeArguments = superType.getTypeArguments();
if (typeArguments.isEmpty()) {
return false;
}
return ASTHelpers.isSameType(
typeArguments.get(typeArgumentIndex), state.getTypeFromString(URL_CLASS), state);
}
}代码示例来源：origin: google/error-prone
@Override
public Description matchMethodInvocation(
MethodInvocationTree methodInvocationTree, VisitorState visitorState) {
if (!TO_ARRAY_MATCHER.matches(methodInvocationTree, visitorState)) {
return NO_MATCH;
}
Types types = visitorState.getTypes();
Type variableType =
types.elemtype(getType(getOnlyElement(methodInvocationTree.getArguments())));
if (variableType == null) {
return NO_MATCH;
}
Type collectionType =
types.asSuper(
ASTHelpers.getReceiverType(methodInvocationTree),
visitorState.getSymbolFromString("java.util.Collection"));
List<Type> typeArguments = collectionType.getTypeArguments();
if (!typeArguments.isEmpty()
&& !types.isCastable(
types.erasure(variableType), types.erasure(getOnlyElement(typeArguments)))) {
return describeMatch(methodInvocationTree);
}
return NO_MATCH;
}
}代码示例来源：origin: google/error-prone
/** Ignore some common ThreadLocal type arguments that are fine to have per-instance copies of. */
private boolean wellKnownTypeArgument(NewClassTree tree, VisitorState state) {
Type type = getType(tree);
if (type == null) {
return false;
}
type = state.getTypes().asSuper(type, state.getSymbolFromString("java.lang.ThreadLocal"));
if (type == null) {
return false;
}
if (type.getTypeArguments().isEmpty()) {
return false;
}
Type argType = getOnlyElement(type.getTypeArguments());
if (WELL_KNOWN_TYPES.contains(argType.asElement().getQualifiedName().toString())) {
return true;
}
if (isSubtype(argType, state.getTypeFromString("java.text.DateFormat"), state)) {
return true;
}
return false;
}
}代码示例来源：origin: google/error-prone
} else if (isSubtype(type, state.getTypeFromString("org.hamcrest.Matcher"), state)) {
Type matcherType =
state.getTypes().asSuper(type, state.getSymbolFromString("org.hamcrest.Matcher"));
if (!matcherType.getTypeArguments().isEmpty()) {
Type matchType = getOnlyElement(matcherType.getTypeArguments());代码示例来源：origin: google/error-prone
Type returnedFutureType = state.getTypes().asSuper(returnType, futureType.tsym);
if (returnedFutureType != null代码示例来源：origin: google/error-prone
return NO_MATCH;
Type classType = state.getTypes().asSuper(type, state.getSymtab().classType.asElement());
if (classType == null || classType.getTypeArguments().isEmpty()) {
return NO_MATCH;代码示例来源：origin: google/error-prone
ASTHelpers.getType(Iterables.getOnlyElement(methodInvocation.getArguments()));
Symbol extension = state.getSymbolFromString("com.google.protobuf.ExtensionLite");
Type genericsArgument = state.getTypes().asSuper(argumentType, extension);代码示例来源：origin: org.kohsuke.sorcerer/sorcerer-javac
@Override
public Type visitTypeVar(TypeVar t, Symbol sym) {
if (t.tsym == sym)
return t;
else
return asSuper(t.bound, sym);
}代码示例来源：origin: org.kohsuke.sorcerer/sorcerer-javac
/** does this functional expression require serialization support? */
boolean isSerializable() {
for (Type target : tree.targets) {
if (types.asSuper(target, syms.serializableType.tsym) != null) {
return true;
}
}
return false;
}代码示例来源：origin: com.google.errorprone/error_prone_core
private static List<Type> typeArgsAsSuper(Type baseType, Type superType, VisitorState state) {
Type projectedType = state.getTypes().asSuper(baseType, superType.tsym);
if (projectedType != null) {
return projectedType.getTypeArguments();
}
return new ArrayList<>();
}代码示例来源：origin: com.google.errorprone/error_prone_core
private static Type predicateType(Type type, VisitorState state) {
Symbol predicate = state.getSymbolFromString(java.util.function.Predicate.class.getName());
if (predicate == null) {
return null;
}
Type asPredicate = state.getTypes().asSuper(type, predicate);
if (asPredicate == null) {
return null;
}
return getOnlyElement(asPredicate.getTypeArguments(), null);
}代码示例来源：origin: org.kohsuke.sorcerer/sorcerer-javac
private JCStatement makeResourceCloseInvocation(JCExpression resource) {
// convert to AutoCloseable if needed
if (types.asSuper(resource.type, syms.autoCloseableType.tsym) == null) {
resource = (JCExpression) convert(resource, syms.autoCloseableType);
}
// create resource.close() method invocation
JCExpression resourceClose = makeCall(resource,
names.close,
List.<JCExpression>nil());
return make.Exec(resourceClose);
}代码示例来源：origin: com.google.errorprone/error_prone_core
private static Type getComparableTypeArgument(ClassTree tree, VisitorState state) {
final Type comparable =
state
.getTypes()
.asSuper(ASTHelpers.getType(tree), state.getSymtab().comparableType.asElement());
if (comparable != null && !comparable.getTypeArguments().isEmpty()) {
return Iterables.getOnlyElement(comparable.getTypeArguments());
}
return null;
}
}代码示例来源：origin: org.jvnet.sorcerer/sorcerer-javac
public void visitTypeCast(JCTypeCast tree) {
result = genExpr(tree.expr, tree.clazz.type).load();
// Additional code is only needed if we cast to a reference type
// which is not statically a supertype of the expression's type.
// For basic types, the coerce(...) in genExpr(...) will do
// the conversion.
if (tree.clazz.type.tag > lastBaseTag &&
types.asSuper(tree.expr.type, tree.clazz.type.tsym) == null) {
code.emitop2(checkcast, makeRef(tree.pos(), tree.clazz.type));
}
}代码示例来源：origin: org.kohsuke.sorcerer/sorcerer-javac
public void visitTypeCast(JCTypeCast tree) {
setTypeAnnotationPositions(tree.pos);
result = genExpr(tree.expr, tree.clazz.type).load();
// Additional code is only needed if we cast to a reference type
// which is not statically a supertype of the expression's type.
// For basic types, the coerce(...) in genExpr(...) will do
// the conversion.
if (!tree.clazz.type.isPrimitive() &&
types.asSuper(tree.expr.type, tree.clazz.type.tsym) == null) {
code.emitop2(checkcast, makeRef(tree.pos(), tree.clazz.type));
}
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