Class TypeManager.StructType

java.lang.Object

de.inetsoftware.jwebassembly.module.TypeManager.StructType

All Implemented Interfaces:

AnyType

Direct Known Subclasses:

ArrayType

Enclosing class:

TypeManager

public static class TypeManager.StructType
extends Object
implements AnyType

A reference to a type.

Author:

Volker Berlin

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	StructType(String name, TypeManager.StructTypeKind kind, TypeManager manager)	Create a reference to type

Method Summary

Modifier and Type	Method	Description
int	getClassIndex()	The running index of the class/type for class meta data, instanceof and interface calls.
int	getCode()	The type code(typeidx) in WebAssembly.
protected int	getComponentClassIndex()	The running index of the component/array class/type for class meta data, instanceof and interface calls.
List<NamedStorageType>	getFields()	Get the fields of this struct
TypeManager.StructTypeKind	getKind()	Get kind of the StructType
String	getName()	Get the name of the Java type
int	getVTable()	Get the vtable offset.
boolean	isRefType()	If the type is a reference type.
boolean	isSubTypeOf(AnyType type)	Check if this is a sub type of given type.
String	toString()
void	writeToStream(ByteArrayOutputStream dataStream, ToIntFunction<FunctionName> getFunctionsID, WasmOptions options)	Write the struct/class meta data to the datastream and set the offset position.

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Details

StructType

protected StructType(@Nonnull
 String name,
 @Nonnull
 TypeManager.StructTypeKind kind,
 @Nonnull
 TypeManager manager)

Create a reference to type

Parameters:

name - the Java class name like "java/lang/String"

kind - the type kind

manager - the manager which hold all StructTypes

Method Details

getCode

public int getCode()

The type code(typeidx) in WebAssembly. Predefined types have an negative typeidx. Custom types have the positive index in the type section.

Specified by:

getCode in interface AnyType

Returns:

the code

isRefType

public boolean isRefType()

If the type is a reference type. A GC reference to the heap.

Specified by:

isRefType in interface AnyType

Returns:

true, is GC type

isSubTypeOf

public boolean isSubTypeOf(AnyType type)

Check if this is a sub type of given type.

Specified by:

isSubTypeOf in interface AnyType

Parameters:

type - type to check

Returns:

true, if both are identical or this is a sub type of other. Or if other is a parent type of this.

getKind

public TypeManager.StructTypeKind getKind()

Get kind of the StructType

Returns:

the type kind

getName

public String getName()

Get the name of the Java type

Returns:

the name

getClassIndex

public int getClassIndex()

The running index of the class/type for class meta data, instanceof and interface calls.

Returns:

the unique index

getComponentClassIndex

protected int getComponentClassIndex()

The running index of the component/array class/type for class meta data, instanceof and interface calls.

Returns:

the unique index or -1 id not an array

getFields

public List<NamedStorageType> getFields()

Get the fields of this struct

Returns:

the fields

writeToStream

public void writeToStream(ByteArrayOutputStream dataStream,
 ToIntFunction<FunctionName> getFunctionsID,
 WasmOptions options)
                   throws IOException

Write the struct/class meta data to the datastream and set the offset position.

Parameters:

dataStream - the target stream

getFunctionsID - source for function IDs

options - the compiler options

Throws:

IOException - should never occur

See Also:

• TypeManager.TYPE_DESCRIPTION_INTERFACE_OFFSET
• TypeManager.TYPE_DESCRIPTION_INSTANCEOF_OFFSET
• TypeManager.TYPE_DESCRIPTION_TYPE_NAME

getVTable

public int getVTable()

Get the vtable offset.

Returns:

the offset

toString

public String toString()

Overrides:

toString in class Object