com.alibaba.fastjson2.util

Class JDKUtils

java.lang.Object

com.alibaba.fastjson2.util.JDKUtils

public class JDKUtils
extends java.lang.Object

Field Summary

Fields

Modifier and Type	Field and Description
static boolean	ANDROID
static int	ANDROID_SDK_INT
static long	ARRAY_BYTE_BASE_OFFSET
static long	ARRAY_CHAR_BASE_OFFSET
static boolean	BIG_ENDIAN
(package private) static java.lang.Class<?>	CLASS_SQL_DATASOURCE
(package private) static java.lang.Class<?>	CLASS_SQL_ROW_SET
static java.lang.Class	CLASS_TRANSIENT
(package private) static java.lang.invoke.MethodHandle	CONSTRUCTOR_LOOKUP
(package private) static boolean	CONSTRUCTOR_LOOKUP_ERROR
static long	FIELD_BIGINTEGER_MAG_OFFSET
static long	FIELD_DECIMAL_INT_COMPACT_OFFSET
static java.lang.reflect.Field	FIELD_STRING_CODER
static boolean	FIELD_STRING_CODER_ERROR
static long	FIELD_STRING_CODER_OFFSET
static java.lang.reflect.Field	FIELD_STRING_VALUE
static boolean	FIELD_STRING_VALUE_ERROR
static long	FIELD_STRING_VALUE_OFFSET
static boolean	GRAAL
static boolean	HAS_SQL
(package private) static java.lang.invoke.MethodHandles.Lookup	IMPL_LOOKUP
static java.lang.invoke.MethodHandle	INDEX_OF_CHAR_LATIN1
(package private) static java.lang.Throwable	initErrorLast
static int	JVM_VERSION
static java.lang.Byte	LATIN1
static java.lang.invoke.MethodHandle	METHOD_HANDLE_HAS_NEGATIVE
static boolean	OPENJ9
static java.util.function.Predicate<byte[]>	PREDICATE_IS_ASCII
(package private) static java.util.concurrent.atomic.AtomicInteger	reflectErrorCount
(package private) static java.lang.Throwable	reflectErrorLast
static java.util.function.ToIntFunction<java.lang.String>	STRING_CODER
static java.util.function.BiFunction<byte[],java.lang.Byte,java.lang.String>	STRING_CREATOR_JDK11
static java.util.function.BiFunction<char[],java.lang.Boolean,java.lang.String>	STRING_CREATOR_JDK8
static java.util.function.Function<java.lang.String,byte[]>	STRING_VALUE
static sun.misc.Unsafe	UNSAFE
static java.lang.Byte	UTF16
static int	VECTOR_BIT_LENGTH
static boolean	VECTOR_SUPPORT

Constructor Summary

Constructors

Constructor and Description
JDKUtils()

Method Summary

Modifier and Type	Method and Description
static java.lang.String	asciiStringJDK8(byte[] bytes, int offset, int strlen)
static char[]	getCharArray(java.lang.String str)
static boolean	isAutoTypeDenyClass(java.lang.Class<?> type) Tests whether a class is a well known deserialization gadget entry point, namely a ClassLoader subclass or a JDK SQL DataSource/RowSet implementation.
static boolean	isSQLDataSourceOrRowSet(java.lang.Class<?> type)
static java.lang.String	latin1StringJDK8(byte[] bytes, int offset, int strlen)
static void	setReflectErrorLast(java.lang.Throwable error)
static java.lang.invoke.MethodHandles.Lookup	trustedLookup(java.lang.Class objectClass)

Methods inherited from class java.lang.Object

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

Field Detail

UNSAFE

public static final sun.misc.Unsafe UNSAFE

ARRAY_BYTE_BASE_OFFSET

public static final long ARRAY_BYTE_BASE_OFFSET

ARRAY_CHAR_BASE_OFFSET

public static final long ARRAY_CHAR_BASE_OFFSET

JVM_VERSION

public static final int JVM_VERSION

LATIN1

public static final java.lang.Byte LATIN1

UTF16

public static final java.lang.Byte UTF16

FIELD_STRING_VALUE

public static final java.lang.reflect.Field FIELD_STRING_VALUE

FIELD_STRING_VALUE_OFFSET

public static final long FIELD_STRING_VALUE_OFFSET

FIELD_STRING_VALUE_ERROR

public static volatile boolean FIELD_STRING_VALUE_ERROR

FIELD_DECIMAL_INT_COMPACT_OFFSET

public static final long FIELD_DECIMAL_INT_COMPACT_OFFSET

FIELD_BIGINTEGER_MAG_OFFSET

public static final long FIELD_BIGINTEGER_MAG_OFFSET

FIELD_STRING_CODER

public static final java.lang.reflect.Field FIELD_STRING_CODER

FIELD_STRING_CODER_OFFSET

public static final long FIELD_STRING_CODER_OFFSET

FIELD_STRING_CODER_ERROR

public static volatile boolean FIELD_STRING_CODER_ERROR

CLASS_SQL_DATASOURCE

static final java.lang.Class<?> CLASS_SQL_DATASOURCE

CLASS_SQL_ROW_SET

static final java.lang.Class<?> CLASS_SQL_ROW_SET

HAS_SQL

public static final boolean HAS_SQL

ANDROID

public static final boolean ANDROID

GRAAL

public static final boolean GRAAL

OPENJ9

public static final boolean OPENJ9

ANDROID_SDK_INT

public static final int ANDROID_SDK_INT

CLASS_TRANSIENT

public static final java.lang.Class CLASS_TRANSIENT

BIG_ENDIAN

public static final boolean BIG_ENDIAN

VECTOR_SUPPORT

public static final boolean VECTOR_SUPPORT

VECTOR_BIT_LENGTH

public static final int VECTOR_BIT_LENGTH

STRING_CREATOR_JDK8

public static final java.util.function.BiFunction<char[],java.lang.Boolean,java.lang.String> STRING_CREATOR_JDK8

STRING_CREATOR_JDK11

public static final java.util.function.BiFunction<byte[],java.lang.Byte,java.lang.String> STRING_CREATOR_JDK11

STRING_CODER

public static final java.util.function.ToIntFunction<java.lang.String> STRING_CODER

STRING_VALUE

public static final java.util.function.Function<java.lang.String,byte[]> STRING_VALUE

METHOD_HANDLE_HAS_NEGATIVE

public static final java.lang.invoke.MethodHandle METHOD_HANDLE_HAS_NEGATIVE

PREDICATE_IS_ASCII

public static final java.util.function.Predicate<byte[]> PREDICATE_IS_ASCII

INDEX_OF_CHAR_LATIN1

public static final java.lang.invoke.MethodHandle INDEX_OF_CHAR_LATIN1

IMPL_LOOKUP

static final java.lang.invoke.MethodHandles.Lookup IMPL_LOOKUP

CONSTRUCTOR_LOOKUP

static volatile java.lang.invoke.MethodHandle CONSTRUCTOR_LOOKUP

CONSTRUCTOR_LOOKUP_ERROR

static volatile boolean CONSTRUCTOR_LOOKUP_ERROR

initErrorLast

static volatile java.lang.Throwable initErrorLast

reflectErrorLast

static volatile java.lang.Throwable reflectErrorLast

reflectErrorCount

static final java.util.concurrent.atomic.AtomicInteger reflectErrorCount

Constructor Detail

JDKUtils

public JDKUtils()

Method Detail

isSQLDataSourceOrRowSet

public static boolean isSQLDataSourceOrRowSet(java.lang.Class<?> type)

isAutoTypeDenyClass

public static boolean isAutoTypeDenyClass(java.lang.Class<?> type)

Tests whether a class is a well known deserialization gadget entry point, namely a ClassLoader subclass or a JDK SQL DataSource/RowSet implementation. Such types must not be resolved by matching an autoType whitelist prefix; only an accept entry naming the type in full is treated as an explicit opt-in.

Parameters:

type - the class to test

Returns:

true if the class must not be resolved through a whitelist prefix match

setReflectErrorLast

public static void setReflectErrorLast(java.lang.Throwable error)

getCharArray

public static char[] getCharArray(java.lang.String str)

trustedLookup

public static java.lang.invoke.MethodHandles.Lookup trustedLookup(java.lang.Class objectClass)

asciiStringJDK8

public static java.lang.String asciiStringJDK8(byte[] bytes,
                                               int offset,
                                               int strlen)

latin1StringJDK8

public static java.lang.String latin1StringJDK8(byte[] bytes,
                                                int offset,
                                                int strlen)