Package gnu.kawa.reflect
Class OccurrenceType
java.lang.Object
gnu.bytecode.Type
gnu.kawa.reflect.OccurrenceType
- All Implemented Interfaces:
TypeValue
,Externalizable
,Serializable
,Type
- Direct Known Subclasses:
MultValuesType
,NodeSetType
A type that matches some number of repetitions of a basetype.
- See Also:
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Nested Class Summary
Nested classes/interfaces inherited from class gnu.bytecode.Type
Type.NeverReturns
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Field Summary
FieldsFields inherited from class gnu.bytecode.Type
boolean_ctype, boolean_type, booleanType, booleanValue_method, byte_type, byteType, char_type, charType, clone_method, double_type, doubleType, doubleValue_method, errorType, float_type, floatType, floatValue_method, int_type, intType, intValue_method, java_lang_Class_type, javalangannotationAnnotationType, javalangBooleanType, javalangCharacterType, javalangClassType, javalanginvokeMethodHandleType, javalangNumberType, javalangObjectType, javalangStringType, javalangThrowableType, long_type, longType, longValue_method, neverReturnsType, nullType, number_type, objectType, pointer_type, reflectClass, short_type, shortType, string_type, throwable_type, toString_method, tostring_type, toStringType, typeArray0, void_type, voidType
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptioncoerceFromObject
(Object obj) Convert an object to a value of this Type.int
Return a numeric code showing "subtype" relationship: 1: if other is a pure subtype of this; 0: if has the same values; -1: if this is a pure subtype of other; -2: if they have values in common but neither is a subtype of the other; -3: if the types have no values in common.static int
compatibleWithCount
(Type type, int count) convertValue
(Expression value) Return converted expression or null.void
emitIsInstance
(Variable incoming, Compilation comp, Target target) Emit code for incoming instanceof this_type.void
emitTestIf
(Variable incoming, Declaration decl, Compilation comp) Emit code for if (incoming instanceof this_type) decl = incoming ....getBase()
Get the constructor function for this type.Return Java-level implementation type.static Type
getInstance
(Type base, int minOccurs, int maxOccurs) boolean
isInstance
(Object obj) static char
itemCountCode
(Type type) Returna a quantifer kind for a sequence type.static boolean
itemCountIsOne
(Type type) static boolean
itemCountIsZeroOrOne
(Type type) static int
itemCountMax
(Type type) static int
itemCountMin
(Type type) static int
itemCountRange
(Type type) Return a conservative estimate on the min/max number of items of a type.static Type
itemPrimeType
(Type type) XQuery formal semantics "prime type"int
int
void
protected void
toString()
void
Methods inherited from class gnu.bytecode.Type
coerceToObject, emitCoerceFromObject, emitCoerceToObject, emitConvertFromPrimitive, emitIsInstance, getGenericSignature, getMaybeGenericSignature, getName, getRawType, getRealType, getReflectClass, getSignature, getSize, getSizeInWords, getType, hashCode, isCompatibleWithValue, isCompatibleWithValue, isExisting, isInterface, isMoreSpecific, isSame, isSubtype, isValidJavaTypeName, isVoid, lookupType, lowestCommonSharedType, lowestCommonSuperType, make, make, printSignature, promote, promoteIfUnsigned, registerTypeForClass, setGenericSignature, setName, setReflectClass, setSignature, signatureLength, signatureLength, signatureToName, signatureToPrimitive, signatureToType, signatureToType, swappedCompareResult
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, notify, notifyAll, wait, wait, wait
Methods inherited from interface java.lang.reflect.Type
getTypeName
Methods inherited from interface gnu.expr.TypeValue
encodeType
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Field Details
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emptySequenceType
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typeOccurrenceType
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Constructor Details
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OccurrenceType
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Method Details
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getBase
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setBase
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minOccurs
public int minOccurs() -
maxOccurs
public int maxOccurs() -
getInstance
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getImplementationType
Description copied from class:Type
Return Java-level implementation type. The type used to implement types not natively understood by the JVM or the Java language. Usually, the identity function. However, a language might handle union types or template types or type expressions calculated at run time. In that case return the type used at the Java level, and known at compile time.- Specified by:
getImplementationType
in interfaceTypeValue
- Overrides:
getImplementationType
in classType
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compare
Description copied from class:Type
Return a numeric code showing "subtype" relationship: 1: if other is a pure subtype of this; 0: if has the same values; -1: if this is a pure subtype of other; -2: if they have values in common but neither is a subtype of the other; -3: if the types have no values in common. "Same values" is rather loose; by "A is a subtype of B" we mean that all instance of A can be "widened" to B. More formally, A.compare(B) returns: 1: all B values can be converted to A without a coercion failure (i.e. a ClassCastException or overflow or major loss of information), but not vice versa. 0: all A values can be converted to B without a coercion failure and vice versa; -1: all A values can be converted to B without a coercion failure but not vice versa; -2: there are (potentially) some A values that can be converted to B, and some B values can be converted to A; -3: there are no A values that can be converted to B, and neither are there any B values that can be converted to A. -
coerceFromObject
Description copied from class:Type
Convert an object to a value of this Type. The result is actually of the implementation type, boxed as appropriate, so it is suitable for standard reflective operations, like the arguments to Field#set or Method#invoke. Throw a ClassCastException when this is not possible.- Specified by:
coerceFromObject
in classType
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isInstance
- Overrides:
isInstance
in classType
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emitTestIf
Description copied from interface:TypeValue
Emit code for if (incoming instanceof this_type) decl = incoming .... This method is designed for typeswitch applications, where this call is the first part of a conditional, so it must be followed by calls to emitElse and emitFi.- Specified by:
emitTestIf
in interfaceTypeValue
- Parameters:
incoming
- Contains the value we are testing to see if it has the type of this. If null, use top-of-stack. May not be null if decl is non-null.decl
- If non-null, assign value after coercion to Declaration.comp
- The compilation state.
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emitIsInstance
Description copied from interface:TypeValue
Emit code for incoming instanceof this_type. The implementation can useInstanceOf .emitIsInstance
which is a conveniece method that callsemitTestIf
.- Specified by:
emitIsInstance
in interfaceTypeValue
- Parameters:
incoming
- Contains the value we are testing to see if it has the the type of 'this'. If null, use top-of-stack.comp
- The compilation state.target
- Where to leave the result.
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convertValue
Description copied from interface:TypeValue
Return converted expression or null.- Specified by:
convertValue
in interfaceTypeValue
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getConstructor
Description copied from interface:TypeValue
Get the constructor function for this type. Returns null if there is no contructor function. Also returns null if this extends ClassType or ArrayType and standard Java constructors (<init>
methods) should be used.- Specified by:
getConstructor
in interfaceTypeValue
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itemCountRange
Return a conservative estimate on the min/max number of items of a type.- Returns:
maxCount << 12 | minCount & 0xFFF
, where amaxCount
of -1 means unbounded.
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itemCountCode
Returna a quantifer kind for a sequence type.- Returns:
- '0' if type is known to be a void (0-item) type; '1' if type is known to be a single-item type; '?' if type matches a sequence of 0 or 1 items; '+' if type matches a sequence of 1 or more items; '*' otherwise.
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itemCountIsZeroOrOne
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itemCountMin
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itemCountMax
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itemCountIsOne
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compatibleWithCount
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itemPrimeType
XQuery formal semantics "prime type" -
toString
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writeExternal
- Specified by:
writeExternal
in interfaceExternalizable
- Throws:
IOException
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readExternal
- Specified by:
readExternal
in interfaceExternalizable
- Throws:
IOException
ClassNotFoundException
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