Package com.klaytn.caver.abi

Class TypeReference<T extends Type>

java.lang.Object

com.klaytn.caver.abi.TypeReference<T>

All Implemented Interfaces:

java.lang.Comparable<TypeReference<T>>

Direct Known Subclasses:

TypeReference.StaticArrayTypeReference, TypeReference.StructTypeReference

public abstract class TypeReference<T extends Type>
extends java.lang.Object
implements java.lang.Comparable<TypeReference<T>>

Type wrapper to get around limitations of Java's type erasure. This is so that we can pass around Typed Array types.

See this blog post for further details.

It may make sense to switch to using Java's reflection Type to avoid working around this fundamental generics limitation.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	TypeReference.StaticArrayTypeReference<T extends Type>	Type wrapper class for static array type.
static class	TypeReference.StructTypeReference<T extends Type>	Type wrapper class for Struct type(StaticStruct, DynamicStruct).

Field Summary

Fields

Modifier and Type	Field	Description
protected static java.util.regex.Pattern	ARRAY_SUFFIX

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	TypeReference()
protected	TypeReference(boolean indexed)

Method Summary

Modifier and Type	Method	Description
int	compareTo(TypeReference<T> o)
static <T extends Type> TypeReference<T>	create(java.lang.Class<T> cls)
static <T extends Type> TypeReference<T>	create(java.lang.Class<T> cls, boolean indexed)
protected static java.lang.Class<? extends Type>	getAtomicTypeClass(java.lang.String solidityType, boolean primitives)	This is a helper method that only works for atomic types (uint, bytes, etc).
java.lang.Class<T>	getClassType()	Workaround to ensure type does not come back as T due to erasure, this enables you to create a TypeReference via Class<T>.
java.lang.reflect.Type	getType()
boolean	isIndexed()
static TypeReference	makeStructTypeReference(java.lang.String tupleString)	Creates a StructTypeReference instance using tupleString.
static TypeReference	makeTypeReference(java.lang.String solidityType)	Create a TypeReference instance using solidity type string.
static TypeReference	makeTypeReference(java.lang.String solidityType, boolean indexed, boolean primitives)	Create a TypeReference instance using solidity type string.

Methods inherited from class java.lang.Object

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

Field Detail

ARRAY_SUFFIX

protected static java.util.regex.Pattern ARRAY_SUFFIX

Constructor Detail

TypeReference

protected TypeReference()

TypeReference

protected TypeReference(boolean indexed)

Method Detail

compareTo

public int compareTo(TypeReference<T> o)

Specified by:

compareTo in interface java.lang.Comparable<T extends Type>

getType

public java.lang.reflect.Type getType()

isIndexed

public boolean isIndexed()

getClassType

public java.lang.Class<T> getClassType()
                                throws java.lang.ClassNotFoundException

Workaround to ensure type does not come back as T due to erasure, this enables you to create a TypeReference via Class<T>.

Returns:

the parameterized Class type if applicable, otherwise a regular class

Throws:

java.lang.ClassNotFoundException - if the class type cannot be determined

create

public static <T extends Type> TypeReference<T> create(java.lang.Class<T> cls)

create

public static <T extends Type> TypeReference<T> create(java.lang.Class<T> cls,
                                                       boolean indexed)

getAtomicTypeClass

protected static java.lang.Class<? extends Type> getAtomicTypeClass(java.lang.String solidityType,
                                                                    boolean primitives)
                                                             throws java.lang.ClassNotFoundException

This is a helper method that only works for atomic types (uint, bytes, etc). Array types must be wrapped by a ParameterizedType.

Parameters:

solidityType - the solidity as a string eg Address Int

primitives - is it a primitive type

Returns:

returns

Throws:

java.lang.ClassNotFoundException - when the class cannot be found.

makeTypeReference

public static TypeReference makeTypeReference(java.lang.String solidityType)
                                       throws java.lang.ClassNotFoundException

Create a TypeReference instance using solidity type string.

Parameters:

solidityType - A solidity type string to make TypeReference.

Returns:

TypeReference

Throws:

java.lang.ClassNotFoundException

makeTypeReference

public static TypeReference makeTypeReference(java.lang.String solidityType,
                                              boolean indexed,
                                              boolean primitives)
                                       throws java.lang.ClassNotFoundException

Create a TypeReference instance using solidity type string.

Parameters:

solidityType - A solidity type string to make TypeReference.

indexed - true if the field is part of the log's topics, false if it one of the logs data.

primitives - If true, a TypeReference instance is created with a type representing the range of the passed integer type.

Returns:

TypeReference

Throws:

java.lang.ClassNotFoundException

makeStructTypeReference

public static TypeReference makeStructTypeReference(java.lang.String tupleString)
                                             throws java.lang.ClassNotFoundException

Creates a StructTypeReference instance using tupleString.

Parameters:

tupleString - A tuple type string

Returns:

StructTypeReference

Throws:

java.lang.ClassNotFoundException