Package com.oracle.truffle.api.strings

Class MutableTruffleString

java.lang.Object

com.oracle.truffle.api.strings.AbstractTruffleString

com.oracle.truffle.api.strings.MutableTruffleString

public final class MutableTruffleString
extends AbstractTruffleString

Represents a mutable variant of a TruffleString. This class also accepts all operations of TruffleString. This class is not thread-safe and allows overwriting bytes in its internal byte array or native pointer via MutableTruffleString.WriteByteNode. The internal array or native pointer may also be modified externally, but the corresponding MutableTruffleString must be notified of this via notifyExternalMutation(). MutableTruffleString is not a Truffle interop type, and must be converted to an immutable TruffleString via TruffleString.AsTruffleStringNode before passing a language boundary.

Since:

22.1

See Also:

• TruffleString

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	MutableTruffleString.AsManagedNode	Node to get the given AbstractTruffleString as a managed MutableTruffleString, meaning that the resulting string's backing memory is not a native pointer.
static class	MutableTruffleString.AsMutableTruffleStringNode	Node to get a AbstractTruffleString as a MutableTruffleString.
static class	MutableTruffleString.ConcatNode	Node to create a new MutableTruffleString by concatenating two strings.
static class	MutableTruffleString.ForceEncodingNode	Node to forcibly assign any encoding to a string.
static class	MutableTruffleString.FromByteArrayNode	Node to create a new MutableTruffleString from a byte array.
static class	MutableTruffleString.FromNativePointerNode	Node to create a new MutableTruffleString from an interop object representing a native pointer.
static class	MutableTruffleString.SubstringByteIndexNode	MutableTruffleString.SubstringNode, but with byte indices.
static class	MutableTruffleString.SubstringNode	Node to create a new mutable substring of a string.
static class	MutableTruffleString.SwitchEncodingNode	Node to get a given string in a specific encoding.
static class	MutableTruffleString.WriteByteNode	Node to write a byte into a mutable string.

Method Summary

Modifier and Type	Method	Description
MutableTruffleString	concatUncached(AbstractTruffleString b, TruffleString.Encoding expectedEncoding)	Shorthand for calling the uncached version of MutableTruffleString.ConcatNode.
static MutableTruffleString	fromByteArrayUncached(byte[] value, int byteOffset, int byteLength, TruffleString.Encoding encoding, boolean copy)	Shorthand for calling the uncached version of MutableTruffleString.FromByteArrayNode.
static MutableTruffleString	fromNativePointerUncached(Object pointerObject, int byteOffset, int byteLength, TruffleString.Encoding encoding, boolean copy)	Shorthand for calling the uncached version of MutableTruffleString.FromNativePointerNode.
void	notifyExternalMutation()	Notify this mutable string of an external modification of its internal content.
MutableTruffleString	substringByteIndexUncached(int byteOffset, int byteLength, TruffleString.Encoding expectedEncoding)	Shorthand for calling the uncached version of MutableTruffleString.SubstringByteIndexNode.
MutableTruffleString	substringUncached(int byteOffset, int byteLength, TruffleString.Encoding expectedEncoding)	Shorthand for calling the uncached version of MutableTruffleString.SubstringNode.
void	writeByteUncached(int byteIndex, byte value, TruffleString.Encoding expectedEncoding)	Shorthand for calling the uncached version of MutableTruffleString.WriteByteNode.

Methods inherited from class com.oracle.truffle.api.strings.AbstractTruffleString

asManagedMutableTruffleStringUncached, asManagedTruffleStringUncached, asManagedTruffleStringUncached, asMutableTruffleStringUncached, asTruffleStringUncached, byteIndexOfAnyByteUncached, byteIndexOfCodePointUncached, byteIndexOfStringUncached, byteIndexOfStringUncached, byteIndexToCodePointIndexUncached, byteLength, byteLengthOfCodePointUncached, byteLengthOfCodePointUncached, charIndexOfAnyCharUTF16Uncached, codePointAtByteIndexUncached, codePointAtByteIndexUncached, codePointAtIndexUncached, codePointAtIndexUncached, codePointIndexToByteIndexUncached, codePointLengthUncached, codeRangeEqualsUncached, compareBytesUncached, compareCharsUTF16Uncached, compareIntsUTF32Uncached, concatUncached, copyToByteArrayNodeUncached, copyToByteArrayUncached, copyToByteArrayUncached, copyToNativeMemoryNodeUncached, copyToNativeMemoryUncached, createBackwardCodePointIteratorUncached, createCodePointIteratorUncached, equals, equalsUncached, forceEncodingUncached, getByteCodeRangeUncached, getCodeRangeImpreciseUncached, getCodeRangeUncached, getInternalByteArrayUncached, getInternalNativePointerUncached, getStringCompactionLevelUncached, hashCode, hashCodeUncached, indexOfCodePointUncached, indexOfStringUncached, intIndexOfAnyIntUTF32Uncached, isCompatibleTo, isCompatibleToUncached, isEmpty, isImmutable, isManaged, isMutable, isNative, isValidUncached, lastByteIndexOfCodePointUncached, lastByteIndexOfStringUncached, lastByteIndexOfStringUncached, lastIndexOfCodePointUncached, lastIndexOfStringUncached, materializeUncached, parseDoubleUncached, parseIntUncached, parseIntUncached, parseLongUncached, parseLongUncached, readByteUncached, readCharUTF16Uncached, regionEqualByteIndexUncached, regionEqualByteIndexUncached, regionEqualsUncached, repeatUncached, substringByteIndexUncached, substringUncached, switchEncodingUncached, switchEncodingUncached, toJavaStringUncached, toString, toStringDebug, toValidStringUncached

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Method Details

notifyExternalMutation

public void notifyExternalMutation()

Notify this mutable string of an external modification of its internal content. This method must be called after every direct write (not via MutableTruffleString.WriteByteNode) to the byte array or native pointer the string is using as internal storage. Exemplary usage scenario: Suppose a MutableTruffleString was created by wrapping a native pointer via MutableTruffleString.FromNativePointerNode. If the native pointer is passed to a native function that may modify the pointer's contents, this method must be called afterwards, to ensure consistency.

Since:

22.1

fromByteArrayUncached

public static MutableTruffleString fromByteArrayUncached(byte[] value,
 int byteOffset,
 int byteLength,
 TruffleString.Encoding encoding,
 boolean copy)

Shorthand for calling the uncached version of MutableTruffleString.FromByteArrayNode.

Since:

22.1

fromNativePointerUncached

public static MutableTruffleString fromNativePointerUncached(Object pointerObject,
 int byteOffset,
 int byteLength,
 TruffleString.Encoding encoding,
 boolean copy)

Shorthand for calling the uncached version of MutableTruffleString.FromNativePointerNode.

Since:

22.1

writeByteUncached

public void writeByteUncached(int byteIndex,
 byte value,
 TruffleString.Encoding expectedEncoding)

Shorthand for calling the uncached version of MutableTruffleString.WriteByteNode.

Since:

22.1

concatUncached

public MutableTruffleString concatUncached(AbstractTruffleString b,
 TruffleString.Encoding expectedEncoding)

Shorthand for calling the uncached version of MutableTruffleString.ConcatNode.

Since:

22.1

substringUncached

public MutableTruffleString substringUncached(int byteOffset,
 int byteLength,
 TruffleString.Encoding expectedEncoding)

Shorthand for calling the uncached version of MutableTruffleString.SubstringNode.

Since:

22.1

substringByteIndexUncached

public MutableTruffleString substringByteIndexUncached(int byteOffset,
 int byteLength,
 TruffleString.Encoding expectedEncoding)

Shorthand for calling the uncached version of MutableTruffleString.SubstringByteIndexNode.

Since:

22.1