47 
 48     private static final Set<String> pointyNames = Set.of(ConstantDescs.INIT_NAME, ConstantDescs.CLASS_INIT_NAME);
 49 
 50     /** No instantiation */
 51     private ConstantUtils() {}
 52 
 53     // Note:
 54     // Non-JDK users should create their own utilities that wrap
 55     // {@code .describeConstable().orElseThrow()} calls;
 56     // these xxDesc methods has undefined and unsafe exceptional
 57     // behavior, so they are not suitable as public APIs.
 58 
 59     /**
 60      * Creates a {@linkplain ClassDesc} from a pre-validated binary name
 61      * for a class or interface type. Validated version of {@link
 62      * ClassDesc#of(String)}.
 63      *
 64      * @param binaryName a binary name
 65      */
 66     public static ClassDesc binaryNameToDesc(String binaryName) {
 67         return ReferenceClassDescImpl.ofValidated("L" + binaryToInternal(binaryName) + ";");
 68     }
 69 
 70     /**
 71      * Creates a ClassDesc from a Class object, requires that this class
 72      * can always be described nominally, i.e. this class is not a
 73      * hidden class or interface or an array with a hidden component
 74      * type.
 75      */
 76     public static ClassDesc classDesc(Class<?> type) {
 77         if (type.isPrimitive()) {
 78             return Wrapper.forPrimitiveType(type).basicClassDescriptor();
 79         }
 80         return referenceClassDesc(type);
 81     }
 82 
 83     /**
 84      * Creates a ClassDesc from a Class object representing a non-hidden
 85      * class or interface or an array type with a non-hidden component type.
 86      */
 87     public static ClassDesc referenceClassDesc(Class<?> type) {
 88         return ReferenceClassDescImpl.ofValidated(type.descriptorString());
 89     }
 90 
 91     /**
 92      * Creates a MethodTypeDesc from a MethodType object, requires that
 93      * the type can be described nominally, i.e. all of its return
 94      * type and parameter types can be described nominally.
 95      */
 96     public static MethodTypeDesc methodTypeDesc(MethodType type) {
 97         var returnDesc = classDesc(type.returnType());
 98         if (type.parameterCount() == 0) {
 99             return MethodTypeDescImpl.ofValidated(returnDesc, EMPTY_CLASSDESC);
100         }
101         var paramDescs = new ClassDesc[type.parameterCount()];
102         for (int i = 0; i < type.parameterCount(); i++) {
103             paramDescs[i] = classDesc(type.parameterType(i));
104         }
105         return MethodTypeDescImpl.ofValidated(returnDesc, paramDescs);
106     }
107 
108     /**

292                 throw new IllegalArgumentException("Bad method descriptor: " + descriptor);
293             ptypes.add(resolveClassDesc(descriptor, cur, len));
294             cur += len;
295         }
296         if (cur >= end)
297             throw new IllegalArgumentException("Bad method descriptor: " + descriptor);
298         ++cur;  // skip ')'
299 
300         int rLen = skipOverFieldSignature(descriptor, cur, end, true);
301         if (rLen == 0 || cur + rLen != end)
302             throw new IllegalArgumentException("Bad method descriptor: " + descriptor);
303         ptypes.set(0, resolveClassDesc(descriptor, cur, rLen));
304         return ptypes;
305     }
306 
307     private static ClassDesc resolveClassDesc(String descriptor, int start, int len) {
308         if (len == 1) {
309             return Wrapper.forPrimitiveType(descriptor.charAt(start)).basicClassDescriptor();
310         }
311         // Pre-verified in parseMethodDescriptor; avoid redundant verification
312         return ReferenceClassDescImpl.ofValidated(descriptor.substring(start, start + len));
313     }
314 
315     private static final char JVM_SIGNATURE_ARRAY = '[';
316     private static final char JVM_SIGNATURE_BYTE = 'B';
317     private static final char JVM_SIGNATURE_CHAR = 'C';
318     private static final char JVM_SIGNATURE_CLASS = 'L';
319     private static final char JVM_SIGNATURE_ENDCLASS = ';';
320     private static final char JVM_SIGNATURE_ENUM = 'E';
321     private static final char JVM_SIGNATURE_FLOAT = 'F';
322     private static final char JVM_SIGNATURE_DOUBLE = 'D';
323     private static final char JVM_SIGNATURE_FUNC = '(';
324     private static final char JVM_SIGNATURE_ENDFUNC = ')';
325     private static final char JVM_SIGNATURE_INT = 'I';
326     private static final char JVM_SIGNATURE_LONG = 'J';
327     private static final char JVM_SIGNATURE_SHORT = 'S';
328     private static final char JVM_SIGNATURE_VOID = 'V';
329     private static final char JVM_SIGNATURE_BOOLEAN = 'Z';
330 
331     /**
332      * Validates that the characters at [start, end) within the provided string

 47 
 48     private static final Set<String> pointyNames = Set.of(ConstantDescs.INIT_NAME, ConstantDescs.CLASS_INIT_NAME);
 49 
 50     /** No instantiation */
 51     private ConstantUtils() {}
 52 
 53     // Note:
 54     // Non-JDK users should create their own utilities that wrap
 55     // {@code .describeConstable().orElseThrow()} calls;
 56     // these xxDesc methods has undefined and unsafe exceptional
 57     // behavior, so they are not suitable as public APIs.
 58 
 59     /**
 60      * Creates a {@linkplain ClassDesc} from a pre-validated binary name
 61      * for a class or interface type. Validated version of {@link
 62      * ClassDesc#of(String)}.
 63      *
 64      * @param binaryName a binary name
 65      */
 66     public static ClassDesc binaryNameToDesc(String binaryName) {
 67         return ClassDescImpl.ofValidated("L" + binaryToInternal(binaryName) + ";");
 68     }
 69 
 70     /**
 71      * Creates a ClassDesc from a Class object, requires that this class
 72      * can always be described nominally, i.e. this class is not a
 73      * hidden class or interface or an array with a hidden component
 74      * type.
 75      */
 76     public static ClassDesc classDesc(Class<?> type) {
 77         if (type.isPrimitive()) {
 78             return Wrapper.forPrimitiveType(type).basicClassDescriptor();
 79         }
 80         return referenceClassDesc(type);
 81     }
 82 
 83     /**
 84      * Creates a ClassDesc from a Class object representing a non-hidden
 85      * class or interface or an array type with a non-hidden component type.
 86      */
 87     public static ClassDesc referenceClassDesc(Class<?> type) {
 88         return ClassDescImpl.ofValidated(type.descriptorString());
 89     }
 90 
 91     /**
 92      * Creates a MethodTypeDesc from a MethodType object, requires that
 93      * the type can be described nominally, i.e. all of its return
 94      * type and parameter types can be described nominally.
 95      */
 96     public static MethodTypeDesc methodTypeDesc(MethodType type) {
 97         var returnDesc = classDesc(type.returnType());
 98         if (type.parameterCount() == 0) {
 99             return MethodTypeDescImpl.ofValidated(returnDesc, EMPTY_CLASSDESC);
100         }
101         var paramDescs = new ClassDesc[type.parameterCount()];
102         for (int i = 0; i < type.parameterCount(); i++) {
103             paramDescs[i] = classDesc(type.parameterType(i));
104         }
105         return MethodTypeDescImpl.ofValidated(returnDesc, paramDescs);
106     }
107 
108     /**

292                 throw new IllegalArgumentException("Bad method descriptor: " + descriptor);
293             ptypes.add(resolveClassDesc(descriptor, cur, len));
294             cur += len;
295         }
296         if (cur >= end)
297             throw new IllegalArgumentException("Bad method descriptor: " + descriptor);
298         ++cur;  // skip ')'
299 
300         int rLen = skipOverFieldSignature(descriptor, cur, end, true);
301         if (rLen == 0 || cur + rLen != end)
302             throw new IllegalArgumentException("Bad method descriptor: " + descriptor);
303         ptypes.set(0, resolveClassDesc(descriptor, cur, rLen));
304         return ptypes;
305     }
306 
307     private static ClassDesc resolveClassDesc(String descriptor, int start, int len) {
308         if (len == 1) {
309             return Wrapper.forPrimitiveType(descriptor.charAt(start)).basicClassDescriptor();
310         }
311         // Pre-verified in parseMethodDescriptor; avoid redundant verification
312         return ClassDescImpl.ofValidated(descriptor.substring(start, start + len));
313     }
314 
315     private static final char JVM_SIGNATURE_ARRAY = '[';
316     private static final char JVM_SIGNATURE_BYTE = 'B';
317     private static final char JVM_SIGNATURE_CHAR = 'C';
318     private static final char JVM_SIGNATURE_CLASS = 'L';
319     private static final char JVM_SIGNATURE_ENDCLASS = ';';
320     private static final char JVM_SIGNATURE_ENUM = 'E';
321     private static final char JVM_SIGNATURE_FLOAT = 'F';
322     private static final char JVM_SIGNATURE_DOUBLE = 'D';
323     private static final char JVM_SIGNATURE_FUNC = '(';
324     private static final char JVM_SIGNATURE_ENDFUNC = ')';
325     private static final char JVM_SIGNATURE_INT = 'I';
326     private static final char JVM_SIGNATURE_LONG = 'J';
327     private static final char JVM_SIGNATURE_SHORT = 'S';
328     private static final char JVM_SIGNATURE_VOID = 'V';
329     private static final char JVM_SIGNATURE_BOOLEAN = 'Z';
330 
331     /**
332      * Validates that the characters at [start, end) within the provided string