OpenJDK 27 · jdk.internal.classfile.impl.BufWriterImpl

Modifier and Type	Field and Description
private final ConstantPoolBuilder	constantPool
private final ClassFileImpl	context
pack-priv byte[]	elems
private static final JavaLangAccess	JLA
private LabelContext	labelContext
private boolean	labelsMatch
private final int	majorVersion
pack-priv int	offset
private final ClassEntry	thisClass

Access	Constructor and Description
public	BufWriterImpl(ConstantPoolBuilder constantPool, ClassFileImpl context)
public	BufWriterImpl(ConstantPoolBuilder constantPool, ClassFileImpl context, int initialSize)
public	BufWriterImpl(ConstantPoolBuilder constantPool, ClassFileImpl context, int initialSize, ClassEntry thisClass, int majorVersion)

Method Summary

Modifier and Type	Method and Description
public RawBytecodeHelper.CodeRange	bytecodeView()
public boolean	canWriteDirect(ConstantPool other) Implements java.lang.classfile.BufWriter.canWriteDirect. Returns whether the provided constant pool is index-compatible with the constant pool of this buffer.
public ConstantPoolBuilder	constantPool() Implements java.lang.classfile.BufWriter.constantPool. Returns the constant pool builder associated with this buffer.
public ClassFileImpl	context()
public void	copyTo(byte[] array, int bufferOffset)
public int	cpIndex(PoolEntry entry)
public int	cpIndexOrZero(PoolEntry entry)
public int	getMajorVersion()
private void	grow(int minCapacity)
pack-priv static IllegalArgumentException	invalidIndex(int idx, PoolEntry entry)
pack-priv static byte[]	join(BufWriterImpl head, BufWriterImpl tail) Join head and tail into an exact-size buffer
public LabelContext	labelContext()
public boolean	labelsMatch(LabelContext lc)
public void	patchInt(int offset, int size, int value) Implements java.lang.classfile.BufWriter.patchInt. Patches a previously written integer value.
public void	patchInt(int offset, int x)
public void	patchU2(int offset, int x)
public void	reserveSpace(int freeBytes) Implements java.lang.classfile.BufWriter.reserveSpace. Ensures that the buffer has at least `freeBytes` bytes of free space in the end of the buffer.
public void	setLabelContext(LabelContext labelContext, boolean labelsMatch)
public int	size() Implements java.lang.classfile.BufWriter.size. Returns the number of bytes that have been written to the buffer.
public int	Returns: the index, for later patching skip(int number of bytes to skip bytes) Skip a few bytes in the output buffer.
public ClassEntry	thisClass()
public void	writeBytes(byte[] arr) Implements java.lang.classfile.BufWriter.writeBytes. Writes the contents of a byte array to the buffer.
public void	writeBytes(BufWriterImpl other)
public void	writeBytes(byte[] arr, int start, int length) Implements java.lang.classfile.BufWriter.writeBytes. Writes a range of a byte array to the buffer.
public void	writeDouble(double x) Implements java.lang.classfile.BufWriter.writeDouble. Writes a double value, of 8 bytes, to the buffer.
public void	writeFloat(float x) Implements java.lang.classfile.BufWriter.writeFloat. Writes a float value, of 4 bytes, to the buffer.
public void	writeIndex(PoolEntry entry) Implements java.lang.classfile.BufWriter.writeIndex. Writes the index of the specified constant pool entry as a `u2`.
public void	writeIndex(int bytecode, PoolEntry entry)
public void	writeIndexOrZero(PoolEntry entry) Implements java.lang.classfile.BufWriter.writeIndexOrZero. Writes the index of the specified constant pool entry, or the value `0` if the specified entry is `null`, as a `u2`.
public void	writeInt(int x) Implements java.lang.classfile.BufWriter.writeInt. Writes 4 bytes, or an int, to the buffer.
public void	writeIntBytes(int intSize, long intValue) Implements java.lang.classfile.BufWriter.writeIntBytes. Writes a multibyte value to the buffer.
public void	writeIntInt(int x1, int x2)
public void	writeLong(long x) Implements java.lang.classfile.BufWriter.writeLong. Writes 8 bytes, or a long, to the buffer.
public void	writeU1(int x) Implements java.lang.classfile.BufWriter.writeU1. Writes a byte to the buffer.
public void	writeU1U1(int x1, int x2)
public void	writeU1U1U1(int x1, int x2, int x3)
public void	writeU1U1U2(int x1, int x2, int x3)
public void	writeU1U2(int u1, int u2)
public void	writeU1U2U2(int x1, int x2, int x3)
public void	writeU2(int x) Implements java.lang.classfile.BufWriter.writeU2. Writes 2 bytes, or a short, to the buffer.
public void	writeU2U1(int x1, int x2)
public void	writeU2U2(int x1, int x2)
public void	writeU2U2U2(int x1, int x2, int x3)
pack-priv void	writeUtfEntry(String str)

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

constantPool	back to summary
private final ConstantPoolBuilder constantPool

context	back to summary
private final ClassFileImpl context

elems	back to summary
pack-priv byte[] elems

JLA	back to summary
private static final JavaLangAccess JLA

labelContext	back to summary
private LabelContext labelContext

labelsMatch	back to summary
private boolean labelsMatch

majorVersion	back to summary
private final int majorVersion

offset	back to summary
pack-priv int offset

thisClass	back to summary
private final ClassEntry thisClass

BufWriterImpl	back to summary
public BufWriterImpl(ConstantPoolBuilder constantPool, ClassFileImpl context)

BufWriterImpl	back to summary
public BufWriterImpl(ConstantPoolBuilder constantPool, ClassFileImpl context, int initialSize)

BufWriterImpl	back to summary
public BufWriterImpl(ConstantPoolBuilder constantPool, ClassFileImpl context, int initialSize, ClassEntry thisClass, int majorVersion)

Method Detail

bytecodeView	back to summary
public RawBytecodeHelper.CodeRange bytecodeView()

canWriteDirect back to summary

canWriteDirect	back to summary
public boolean canWriteDirect(ConstantPool other) Implements java.lang.classfile.BufWriter.canWriteDirect. Doc from java.lang.classfile.BufWriter.canWriteDirect. Returns whether the provided constant pool is index-compatible with the constant pool of this buffer. This is a shortcut for `constantPool().canWriteDirect(other)`. Annotations @Override

public boolean canWriteDirect(ConstantPool other)

Implements java.lang.classfile.BufWriter.canWriteDirect.

Doc from java.lang.classfile.BufWriter.canWriteDirect.

Returns whether the provided constant pool is index-compatible with the constant pool of this buffer.

This is a shortcut for constantPool().canWriteDirect(other).

Annotations

@Override

constantPool	back to summary
public ConstantPoolBuilder constantPool() Implements java.lang.classfile.BufWriter.constantPool. Doc from java.lang.classfile.BufWriter.constantPool. Returns the constant pool builder associated with this buffer. Annotations @Override

constantPool

back to summary

public ConstantPoolBuilder constantPool()

Implements java.lang.classfile.BufWriter.constantPool.

Doc from java.lang.classfile.BufWriter.constantPool.

Returns the constant pool builder associated with this buffer.

Annotations

@Override

context	back to summary
public ClassFileImpl context()

copyTo	back to summary
public void copyTo(byte[] array, int bufferOffset)

cpIndex	back to summary
public int cpIndex(PoolEntry entry)

cpIndexOrZero	back to summary
public int cpIndexOrZero(PoolEntry entry)

getMajorVersion	back to summary
public int getMajorVersion()

grow	back to summary
private void grow(int minCapacity)

invalidIndex	back to summary
pack-priv static IllegalArgumentException invalidIndex(int idx, PoolEntry entry)

join	back to summary
pack-priv static byte[] join(BufWriterImpl head, BufWriterImpl tail) Join head and tail into an exact-size buffer

labelContext	back to summary
public LabelContext labelContext()

labelsMatch	back to summary
public boolean labelsMatch(LabelContext lc)

patchInt back to summary

patchInt	back to summary
public void patchInt(int offset, int size, int value) Implements java.lang.classfile.BufWriter.patchInt. Doc from java.lang.classfile.BufWriter.patchInt. Patches a previously written integer value. `value` is truncated to the given `size` number of bytes and written at the given `offset`. The end of this buffer stays unchanged. Annotations @Override

public void patchInt(int offset, int size, int value)

Implements java.lang.classfile.BufWriter.patchInt.

Doc from java.lang.classfile.BufWriter.patchInt.

Patches a previously written integer value. value is truncated to the given size number of bytes and written at the given offset. The end of this buffer stays unchanged.

Annotations

@Override

patchInt	back to summary
public void patchInt(int offset, int x)

patchU2	back to summary
public void patchU2(int offset, int x)

reserveSpace back to summary

reserveSpace	back to summary
public void reserveSpace(int freeBytes) Implements java.lang.classfile.BufWriter.reserveSpace. Doc from java.lang.classfile.BufWriter.reserveSpace. Ensures that the buffer has at least `freeBytes` bytes of free space in the end of the buffer. The writing result is the same without calls to this method, but the writing process may be slower. Annotations @Override

public void reserveSpace(int freeBytes)

Implements java.lang.classfile.BufWriter.reserveSpace.

Doc from java.lang.classfile.BufWriter.reserveSpace.

Ensures that the buffer has at least freeBytes bytes of free space in the end of the buffer.

The writing result is the same without calls to this method, but the writing process may be slower.

Annotations

@Override

setLabelContext	back to summary
public void setLabelContext(LabelContext labelContext, boolean labelsMatch)

size	back to summary
public int size() Implements java.lang.classfile.BufWriter.size. Doc from java.lang.classfile.BufWriter.size. Returns the number of bytes that have been written to the buffer. Annotations @Override

size

back to summary

public int size()

Implements java.lang.classfile.BufWriter.size.

Doc from java.lang.classfile.BufWriter.size.

Returns the number of bytes that have been written to the buffer.

Annotations

@Override

skip	back to summary
public int skip(int bytes) Skip a few bytes in the output buffer. The skipped area has undefined value. Parameters bytes:int number of bytes to skip Returns:int the index, for later patching

skip

back to summary

public int skip(int bytes)

Skip a few bytes in the output buffer. The skipped area has undefined value.

Parameters

bytes:int: number of bytes to skip

Returns:int

the index, for later patching

thisClass	back to summary
public ClassEntry thisClass()

writeBytes	back to summary
public void writeBytes(byte[] arr) Implements java.lang.classfile.BufWriter.writeBytes. Doc from java.lang.classfile.BufWriter.writeBytes. Writes the contents of a byte array to the buffer. Annotations @Override

writeBytes

back to summary

public void writeBytes(byte[] arr)

Implements java.lang.classfile.BufWriter.writeBytes.

Doc from java.lang.classfile.BufWriter.writeBytes.

Writes the contents of a byte array to the buffer.

Annotations

@Override

writeBytes	back to summary
public void writeBytes(BufWriterImpl other)

writeBytes	back to summary
public void writeBytes(byte[] arr, int start, int length) Implements java.lang.classfile.BufWriter.writeBytes. Doc from java.lang.classfile.BufWriter.writeBytes. Writes a range of a byte array to the buffer. Annotations @Override

writeBytes

back to summary

public void writeBytes(byte[] arr, int start, int length)

Implements java.lang.classfile.BufWriter.writeBytes.

Doc from java.lang.classfile.BufWriter.writeBytes.

Writes a range of a byte array to the buffer.

Annotations

@Override

writeDouble back to summary

writeDouble	back to summary
public void writeDouble(double x) Implements java.lang.classfile.BufWriter.writeDouble. Doc from java.lang.classfile.BufWriter.writeDouble. Writes a double value, of 8 bytes, to the buffer. In the conversions, all NaN values of the `double` may or may not be collapsed into a single "canonical" NaN value. Annotations @Override

public void writeDouble(double x)

Implements java.lang.classfile.BufWriter.writeDouble.

Doc from java.lang.classfile.BufWriter.writeDouble.

Writes a double value, of 8 bytes, to the buffer.

In the conversions, all NaN values of the double may or may not be collapsed into a single "canonical" NaN value.

Annotations

@Override

writeFloat back to summary

writeFloat	back to summary
public void writeFloat(float x) Implements java.lang.classfile.BufWriter.writeFloat. Doc from java.lang.classfile.BufWriter.writeFloat. Writes a float value, of 4 bytes, to the buffer. In the conversions, all NaN values of the `float` may or may not be collapsed into a single "canonical" NaN value. Annotations @Override

public void writeFloat(float x)

Implements java.lang.classfile.BufWriter.writeFloat.

Doc from java.lang.classfile.BufWriter.writeFloat.

Writes a float value, of 4 bytes, to the buffer.

In the conversions, all NaN values of the float may or may not be collapsed into a single "canonical" NaN value.

Annotations

@Override

writeIndex back to summary

writeIndex	back to summary
public void writeIndex(PoolEntry entry) Implements java.lang.classfile.BufWriter.writeIndex. Doc from java.lang.classfile.BufWriter.writeIndex. Writes the index of the specified constant pool entry as a `u2`. If the `entry` does not belong to the constant pool of this buffer, it will be converted, and the index of the converted pool entry is written instead. Annotations @ForceInline @Override

public void writeIndex(PoolEntry entry)

Implements java.lang.classfile.BufWriter.writeIndex.

Doc from java.lang.classfile.BufWriter.writeIndex.

Writes the index of the specified constant pool entry as a u2. If the entry does not belong to the constant pool of this buffer, it will be converted, and the index of the converted pool entry is written instead.

Annotations

@ForceInline
@Override

writeIndex	back to summary
public void writeIndex(int bytecode, PoolEntry entry)

writeIndexOrZero back to summary

writeIndexOrZero	back to summary
public void writeIndexOrZero(PoolEntry entry) Implements java.lang.classfile.BufWriter.writeIndexOrZero. Doc from java.lang.classfile.BufWriter.writeIndexOrZero. Writes the index of the specified constant pool entry, or the value `0` if the specified entry is `null`, as a `u2`. If the `entry` does not belong to the constant pool of this buffer, it will be converted, and the index of the converted pool entry is written instead. Annotations @Override

public void writeIndexOrZero(PoolEntry entry)

Implements java.lang.classfile.BufWriter.writeIndexOrZero.

Doc from java.lang.classfile.BufWriter.writeIndexOrZero.

Writes the index of the specified constant pool entry, or the value 0 if the specified entry is null, as a u2. If the entry does not belong to the constant pool of this buffer, it will be converted, and the index of the converted pool entry is written instead.

Annotations

@Override

writeInt	back to summary
public void writeInt(int x) Implements java.lang.classfile.BufWriter.writeInt. Doc from java.lang.classfile.BufWriter.writeInt. Writes 4 bytes, or an int, to the buffer. Annotations @Override

writeInt

back to summary

public void writeInt(int x)

Implements java.lang.classfile.BufWriter.writeInt.

Doc from java.lang.classfile.BufWriter.writeInt.

Writes 4 bytes, or an int, to the buffer.

Annotations

@Override

writeIntBytes back to summary

writeIntBytes	back to summary
public void writeIntBytes(int intSize, long intValue) Implements java.lang.classfile.BufWriter.writeIntBytes. Doc from java.lang.classfile.BufWriter.writeIntBytes. Writes a multibyte value to the buffer. `intValue` is truncated to the given `intSize` number of bytes and written. Annotations @Override

public void writeIntBytes(int intSize, long intValue)

Implements java.lang.classfile.BufWriter.writeIntBytes.

Doc from java.lang.classfile.BufWriter.writeIntBytes.

Writes a multibyte value to the buffer. intValue is truncated to the given intSize number of bytes and written.

Annotations

@Override

writeIntInt	back to summary
public void writeIntInt(int x1, int x2)

writeLong	back to summary
public void writeLong(long x) Implements java.lang.classfile.BufWriter.writeLong. Doc from java.lang.classfile.BufWriter.writeLong. Writes 8 bytes, or a long, to the buffer. Annotations @Override

writeLong

back to summary

public void writeLong(long x)

Implements java.lang.classfile.BufWriter.writeLong.

Doc from java.lang.classfile.BufWriter.writeLong.

Writes 8 bytes, or a long, to the buffer.

Annotations

@Override

writeU1 back to summary

writeU1	back to summary
public void writeU1(int x) Implements java.lang.classfile.BufWriter.writeU1. Doc from java.lang.classfile.BufWriter.writeU1. Writes a byte to the buffer. `x` is truncated to a byte and written. Annotations @Override

public void writeU1(int x)

Implements java.lang.classfile.BufWriter.writeU1.

Doc from java.lang.classfile.BufWriter.writeU1.

Writes a byte to the buffer. x is truncated to a byte and written.

Annotations

@Override

writeU1U1	back to summary
public void writeU1U1(int x1, int x2) Annotations @ForceInline

writeU1U1U1	back to summary
public void writeU1U1U1(int x1, int x2, int x3)

writeU1U1U2	back to summary
public void writeU1U1U2(int x1, int x2, int x3)

writeU1U2	back to summary
public void writeU1U2(int u1, int u2)

writeU1U2U2	back to summary
public void writeU1U2U2(int x1, int x2, int x3)

writeU2 back to summary

public void writeU2(int x)

Implements java.lang.classfile.BufWriter.writeU2.

Doc from java.lang.classfile.BufWriter.writeU2.

Writes 2 bytes, or a short, to the buffer. x is truncated to two bytes and written.

Annotations

@ForceInline
@Override

writeU2U1	back to summary
public void writeU2U1(int x1, int x2)

writeU2U2	back to summary
public void writeU2U2(int x1, int x2)

writeU2U2U2	back to summary
public void writeU2U2U2(int x1, int x2, int x3)

writeUtfEntry	back to summary
pack-priv void writeUtfEntry(String str) Annotations @SuppressWarnings:deprecation

public final Class BufWriterImpl

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail