Package org.openjdk.asmtools.jasm

Class ConstantPool

java.lang.Object

org.openjdk.asmtools.jasm.ConstantPool

All Implemented Interfaces:

Iterable<ConstCell<?>>

public class ConstantPool
extends Object
implements Iterable<ConstCell<?>>

ConstantPool is the class responsible for maintaining constants for a given class file.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	ConstantPool.ConstValue_BootstrapMethod
static class	ConstantPool.ConstValue_Cell<T extends ConstValue<?>>	CONSTANT_Cell represents CONSTANT_Class(7), CONSTANT_String(8), CONSTANT_MethodType(16), CONSTANT_Module(19), CONSTANT_Package(20) constants
static class	ConstantPool.ConstValue_Class	The CONSTANT_Class(7) structure represents constant objects of the type String
static class	ConstantPool.ConstValue_Double	The CONSTANT_Double(6) represents 8-byte numeric (double) constants
static class	ConstantPool.ConstValue_Dynamic	The CONSTANT_Dynamic (17) structure is used to represent a dynamically-computed constant, an arbitrary value that is produced by invocation of a bootstrap method in the course of a ldc instruction, among others.
static class	ConstantPool.ConstValue_FieldRef	The CONSTANT_Fieldref(9) structure is used to represent a field
static class	ConstantPool.ConstValue_Float	CONSTANT_Float(4) structure represents 4-byte numeric (float) constants
static class	ConstantPool.ConstValue_Integer	CONSTANT_Integer(3) structure represents 4-byte numeric (int) constants
static class	ConstantPool.ConstValue_InterfaceMethodRef	The CONSTANT_InterfaceMethodref(11) structure is used to represent an interface method
static class	ConstantPool.ConstValue_InvokeDynamic	The CONSTANT_InvokeDynamic_info(18) structure is used to represent a dynamically-computed call site, an instance of java.lang.invoke.CallSite that is produced by invocation of a bootstrap method in the course of an invokedynamic instruction.
static class	ConstantPool.ConstValue_Long	The CONSTANT_Long_info(5) represents 8-byte numeric (long) constants
static class	ConstantPool.ConstValue_MethodHandle<P extends ConstantPool.ConstValue_Pair<ConstantPool.ConstValue_Class,ConstantPool.ConstValue_NameAndType>>	The CONSTANT_MethodHandle(15) structure is used to represent a method handle T : ConstValue_MethodRef, ConstValue_InterfaceMethodRef or ConstValue_FieldRef
static class	ConstantPool.ConstValue_MethodRef	The CONSTANT_Methodref(10) structure is used to represent a method
static class	ConstantPool.ConstValue_MethodType	The CONSTANT_MethodType(16) structure represents a method type
static class	ConstantPool.ConstValue_Module	The CONSTANT_Module(19) structure represents a module
static class	ConstantPool.ConstValue_NameAndType	The CONSTANT_NameAndType(12) structure is used to represent a field or method, without indicating which class or interface type it belongs to
static class	ConstantPool.ConstValue_Package	The CONSTANT_Package(20) structure represents a method type
static class	ConstantPool.ConstValue_Pair<L extends ConstValue,R extends ConstValue>	ConstValue_Pair represents CONSTANT_NameAndType(12), CONSTANT_Fieldref(9), CONSTANT_Methodref(10), and CONSTANT_InterfaceMethodref(11) structures
static class	ConstantPool.ConstValue_String	The CONSTANT_String(8) structure represents a class or an interface
static class	ConstantPool.ConstValue_UTF8	CONSTANT_UTF8(1) is used to represent constant objects of the type: String
static class	ConstantPool.ConstValue_Zero	CONSTANT_ZERO: Zero Constant Value presents Constant 0.
static enum	ConstantPool.ReferenceRank

Field Summary

Fields

Modifier and Type	Field	Description
(package private) Hashtable<ConstValue<?>,ConstCell<?>>	ConstantPoolHashByValue
private final ConstantPool.ConstValue_UTF8	emptyConstValue
JasmEnvironment	environment
private final CPVisitor	indexFixerConstantPool
(package private) static final int	NON_PROCESSED
private final ConstCell<?>	nullConst
private final ArrayList<ConstCell<?>>	pool
(package private) static final int	PROCESSED
private final CPVisitor	referenceFixerConstantPool
private final ConstCell<?>	zeroConst

Constructor Summary

Constructors

Constructor	Description
ConstantPool(JasmEnvironment environment)	Main constructor

Method Summary

Modifier and Type	Method	Description
private void	checkAndFixCPIndexes(ConstCell item)
private void	checkAndFixCPRef(ConstCell item)
protected void	checkGlobals()
private void	cpool_set(int cpx, ConstCell cell, int sz)
private void	delete(int cpx)
ConstCell	findCell(ClassFileConst.ConstType tag, ConstCell value)
ConstCell	findCell(ClassFileConst.ConstType tag, ConstCell left, ConstCell right)
ConstCell	findCell(ClassFileConst.ConstType tag, NameInfo nameInfo)
<T extends ConstValue> ConstCell<T>	findCell(T ref)
ConstCell	findClassCell(String name)
ConstCell	findClassCell(NameInfo nameInfo)
ConstCell	findDoubleCell(Long value)
ConstCell	findFloatCell(Integer value)
ConstCell	findIntegerCell(Integer value)
ConstCell	findLongCell(Long value)
ConstCell	findModuleCell(String name)
ConstCell	findModuleCell(NameInfo nameInfo)
ConstCell	findPackageCell(String name)
ConstCell	findPackageCell(NameInfo nameInfo)
ConstCell	findUTF8Cell(String value)
private int	findVacantSlot(int cellSize)
void	fixIndexesInPool()
void	fixRefsInPool()
Range<Integer>	getBounds()
ConstCell	getCell(int cpx)
ConstCell	getConstPollCellByIndex(int cpIndex)
Optional<ConstCell<?>>	getItemizedCell(ConstCell<?> cell)
ArrayList<ConstCell<?>>	getPoolCellsByType(ClassFileConst.ConstType... types)
ArrayList<ConstCell<?>>	getPoolValuesByRefType(ClassFileConst.ConstType... types)
protected void	handleClassIndex(ConstantPool.ConstValue_Cell cell)
protected void	handleClassRef(ConstantPool.ConstValue_Cell cell)
private boolean	handleIndexCell(ConstCell refCell)	Updates reference cell if there is an attached cell but cpIndex is missing.
protected void	handleMemberIndex(ConstantPool.ConstValue_Pair cv)
protected void	handleMemberRef(ConstantPool.ConstValue_Pair cv)
private boolean	handleRefCell(ConstCell refCell)	Updates reference cell if there is cpIndex but a cell is not attached.
private boolean	isAllowedToBeDelete(ConstCell<ConstantPool.ConstValue_UTF8> utf8Cell)
private ConstCell<?>	itemizeCell(ConstCell<?> cell)
protected void	itemizePool()
Iterator<ConstCell<?>>	iterator()
ConstCell	lookupUTF8Cell(Function<String,Boolean> rule)
void	printPool()
void	removeClassCell(ConstCell<ConstantPool.ConstValue_Class> cell)	Removes ClassCell entry from the Constant Pool
void	setCell(int cpx, ConstCell cell)
protected ConstCell<?>	specifyCell(ConstCell<?> cell)
private void	traverseConstantCell(ConstCell<?> constCell, Consumer<ConstCell<?>> op)
protected ConstCell	uncheckedGetCell(int cpx)
void	write(CheckedDataOutputStream out)

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Field Details

PROCESSED

static final int PROCESSED

See Also:

• Constant Field Values

NON_PROCESSED

static final int NON_PROCESSED

See Also:

• Constant Field Values

emptyConstValue

private final ConstantPool.ConstValue_UTF8 emptyConstValue

nullConst

private final ConstCell<?> nullConst

zeroConst

private final ConstCell<?> zeroConst

pool

private final ArrayList<ConstCell<?>> pool

environment

public JasmEnvironment environment

ConstantPoolHashByValue

Hashtable<ConstValue<?>,ConstCell<?>> ConstantPoolHashByValue

indexFixerConstantPool

private final CPVisitor indexFixerConstantPool

referenceFixerConstantPool

private final CPVisitor referenceFixerConstantPool

Constructor Details

ConstantPool

public ConstantPool(JasmEnvironment environment)

Main constructor

Parameters:

environment - The error reporting environment

Method Details

iterator

public Iterator<ConstCell<?>> iterator()

Specified by:

iterator in interface Iterable<ConstCell<?>>

handleClassRef

protected void handleClassRef(ConstantPool.ConstValue_Cell cell)

handleMemberRef

protected void handleMemberRef(ConstantPool.ConstValue_Pair cv)

handleRefCell

private boolean handleRefCell(ConstCell refCell)

Updates reference cell if there is cpIndex but a cell is not attached.

Parameters:

refCell - a constant cell

Returns:

true if the cell is fixed

handleClassIndex

protected void handleClassIndex(ConstantPool.ConstValue_Cell cell)

handleMemberIndex

protected void handleMemberIndex(ConstantPool.ConstValue_Pair cv)

handleIndexCell

private boolean handleIndexCell(ConstCell refCell)

Updates reference cell if there is an attached cell but cpIndex is missing.

Parameters:

refCell - a constant cell

Returns:

true if the cell is fixed

fixRefsInPool

public void fixRefsInPool()

fixIndexesInPool

public void fixIndexesInPool()

checkGlobals

protected void checkGlobals()

checkAndFixCPRef

private void checkAndFixCPRef(ConstCell item)

checkAndFixCPIndexes

private void checkAndFixCPIndexes(ConstCell item)

printPool

public void printPool()

getBounds

public Range<Integer> getBounds()

getConstPollCellByIndex

public ConstCell getConstPollCellByIndex(int cpIndex)

cpool_set

private void cpool_set(int cpx,
 ConstCell cell,
 int sz)

delete

private void delete(int cpx)

traverseConstantCell

private void traverseConstantCell(ConstCell<?> constCell,
 Consumer<ConstCell<?>> op)

uncheckedGetCell

protected ConstCell uncheckedGetCell(int cpx)

getCell

public ConstCell getCell(int cpx)

setCell

public void setCell(int cpx,
 ConstCell cell)

getItemizedCell

public Optional<ConstCell<?>> getItemizedCell(ConstCell<?> cell)

itemizeCell

private ConstCell<?> itemizeCell(ConstCell<?> cell)

itemizePool

protected void itemizePool()

specifyCell

protected ConstCell<?> specifyCell(ConstCell<?> cell)

findVacantSlot

private int findVacantSlot(int cellSize)

findCell

public <T extends ConstValue> ConstCell<T> findCell(T ref)

findIntegerCell

public ConstCell findIntegerCell(Integer value)

findFloatCell

public ConstCell findFloatCell(Integer value)

findLongCell

public ConstCell findLongCell(Long value)

findDoubleCell

public ConstCell findDoubleCell(Long value)

findUTF8Cell

public ConstCell findUTF8Cell(String value)

lookupUTF8Cell

public ConstCell lookupUTF8Cell(Function<String,Boolean> rule)

findClassCell

public ConstCell findClassCell(NameInfo nameInfo)

findClassCell

public ConstCell findClassCell(String name)

findModuleCell

public ConstCell findModuleCell(NameInfo nameInfo)

findModuleCell

public ConstCell findModuleCell(String name)

findPackageCell

public ConstCell findPackageCell(String name)

findPackageCell

public ConstCell findPackageCell(NameInfo nameInfo)

findCell

public ConstCell findCell(ClassFileConst.ConstType tag,
 ConstCell value)

findCell

public ConstCell findCell(ClassFileConst.ConstType tag,
 ConstCell left,
 ConstCell right)

findCell

public ConstCell findCell(ClassFileConst.ConstType tag,
 NameInfo nameInfo)

write

public void write(CheckedDataOutputStream out)
           throws IOException

Throws:

IOException

getPoolCellsByType

public ArrayList<ConstCell<?>> getPoolCellsByType(ClassFileConst.ConstType... types)

getPoolValuesByRefType

public ArrayList<ConstCell<?>> getPoolValuesByRefType(ClassFileConst.ConstType... types)

removeClassCell

public void removeClassCell(ConstCell<ConstantPool.ConstValue_Class> cell)

Removes ClassCell entry from the Constant Pool

Parameters:

cell - the Constant Pool cell ConstCell

isAllowedToBeDelete

private boolean isAllowedToBeDelete(ConstCell<ConstantPool.ConstValue_UTF8> utf8Cell)

Returns:

true if the class name belongs to JDK public API