org.graalvm.compiler.java

Class LambdaUtils

java.lang.Object

org.graalvm.compiler.java.LambdaUtils

public final class LambdaUtils
extends Object

Field Summary

Fields

Modifier and Type	Field and Description
static String	LAMBDA_CLASS_NAME_SUBSTRING
static String	LAMBDA_SPLIT_PATTERN

Method Summary

Modifier and Type	Method and Description
static String	digest(String value)
static String	findStableLambdaName(ClassInitializationPlugin cip, Providers providers, ResolvedJavaType lambdaType, OptionValues options, DebugContext debug, Object ctx) Creates a stable name for a lambda by hashing all the invokes in the lambda.
static boolean	isLambdaType(ResolvedJavaType type)
static String	toHex(byte[] data)

Methods inherited from class java.lang.Object

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

Field Detail

LAMBDA_SPLIT_PATTERN

public static final String LAMBDA_SPLIT_PATTERN

See Also:

Constant Field Values

LAMBDA_CLASS_NAME_SUBSTRING

public static final String LAMBDA_CLASS_NAME_SUBSTRING

See Also:

Constant Field Values

Method Detail

findStableLambdaName

public static String findStableLambdaName(ClassInitializationPlugin cip,
                                          Providers providers,
                                          ResolvedJavaType lambdaType,
                                          OptionValues options,
                                          DebugContext debug,
                                          Object ctx)
                                   throws RuntimeException

Creates a stable name for a lambda by hashing all the invokes in the lambda. Lambda class names are typically created based on an increasing atomic counter (e.g. Test$$Lambda$23). A stable name is created by replacing the substring after "$$Lambda$" with a hash of the method descriptor for each method invoked by the lambda. Starting from JDK17, the lambda classes can have additional interfaces that lambda should implement. This further means that lambda can have more than one public method (public and not bridge). The scala lambda classes have by default one additional interface with one method. This method has the same signature as the original one but with generalized parameters (all parameters are Object types) and serves as a wrapper that casts parameters to specialized types and calls an original method.

Parameters:

cip - plugin to load new types

providers - providers to use when processing the lambda code

lambdaType - the lambda type to analyze

options - options to use when analyzing the lamda code

debug - debug context to nest the analysis into

ctx - context to use for the DebugContext.scope(java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object)

Returns:

stable name for the lambda class

Throws:

RuntimeException

isLambdaType

public static boolean isLambdaType(ResolvedJavaType type)

toHex

public static String toHex(byte[] data)

digest

public static String digest(String value)