Package proguard.classfile.editor

Class InstructionWriter

java.lang.Object

proguard.classfile.editor.InstructionWriter

All Implemented Interfaces:

AttributeVisitor, InstructionVisitor

public class InstructionWriter
extends Object
implements InstructionVisitor, AttributeVisitor

This InstructionVisitor writes out the instructions that it visits, collecting instructions that have to be widened. As an AttributeVisitor, it then applies the collected changes. The process will be repeated recursively, if necessary. The caller still has to update the frame sizes.

Constructor Summary

Constructors

Constructor	Description
InstructionWriter()

Method Summary

Modifier and Type	Method	Description
void	extend(int codeLength)	Extends the size of the accumulated code.
void	reset(int codeLength)	Resets the accumulated code changes for a given anticipated maximum code length.
void	visitAnySwitchInstruction(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, SwitchInstruction switchInstruction)	Visits any SwitchInstruction instance.
void	visitBranchInstruction(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, BranchInstruction branchInstruction)
void	visitCodeAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute)
void	visitConstantInstruction(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, ConstantInstruction constantInstruction)
void	visitSimpleInstruction(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, SimpleInstruction simpleInstruction)
void	visitVariableInstruction(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, VariableInstruction variableInstruction)

Methods inherited from class java.lang.Object

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

Methods inherited from interface proguard.classfile.attribute.visitor.AttributeVisitor

visitAnnotationDefaultAttribute, visitAnyAnnotationsAttribute, visitAnyAttribute, visitAnyParameterAnnotationsAttribute, visitAnyTypeAnnotationsAttribute, visitBootstrapMethodsAttribute, visitConstantValueAttribute, visitDeprecatedAttribute, visitDeprecatedAttribute, visitDeprecatedAttribute, visitDeprecatedAttribute, visitEnclosingMethodAttribute, visitExceptionsAttribute, visitInnerClassesAttribute, visitLineNumberTableAttribute, visitLocalVariableTableAttribute, visitLocalVariableTypeTableAttribute, visitMethodParametersAttribute, visitModuleAttribute, visitModuleMainClassAttribute, visitModulePackagesAttribute, visitNestHostAttribute, visitNestMembersAttribute, visitPermittedSubclassesAttribute, visitRecordAttribute, visitRuntimeInvisibleAnnotationsAttribute, visitRuntimeInvisibleAnnotationsAttribute, visitRuntimeInvisibleAnnotationsAttribute, visitRuntimeInvisibleAnnotationsAttribute, visitRuntimeInvisibleAnnotationsAttribute, visitRuntimeInvisibleParameterAnnotationsAttribute, visitRuntimeInvisibleTypeAnnotationsAttribute, visitRuntimeInvisibleTypeAnnotationsAttribute, visitRuntimeInvisibleTypeAnnotationsAttribute, visitRuntimeInvisibleTypeAnnotationsAttribute, visitRuntimeInvisibleTypeAnnotationsAttribute, visitRuntimeInvisibleTypeAnnotationsAttribute, visitRuntimeVisibleAnnotationsAttribute, visitRuntimeVisibleAnnotationsAttribute, visitRuntimeVisibleAnnotationsAttribute, visitRuntimeVisibleAnnotationsAttribute, visitRuntimeVisibleAnnotationsAttribute, visitRuntimeVisibleParameterAnnotationsAttribute, visitRuntimeVisibleTypeAnnotationsAttribute, visitRuntimeVisibleTypeAnnotationsAttribute, visitRuntimeVisibleTypeAnnotationsAttribute, visitRuntimeVisibleTypeAnnotationsAttribute, visitRuntimeVisibleTypeAnnotationsAttribute, visitRuntimeVisibleTypeAnnotationsAttribute, visitSignatureAttribute, visitSignatureAttribute, visitSignatureAttribute, visitSignatureAttribute, visitSignatureAttribute, visitSourceDebugExtensionAttribute, visitSourceDirAttribute, visitSourceFileAttribute, visitStackMapAttribute, visitStackMapTableAttribute, visitSyntheticAttribute, visitSyntheticAttribute, visitSyntheticAttribute, visitSyntheticAttribute, visitUnknownAttribute

Methods inherited from interface proguard.classfile.instruction.visitor.InstructionVisitor

visitAnyInstruction, visitLookUpSwitchInstruction, visitTableSwitchInstruction

Constructor Details

InstructionWriter

public InstructionWriter()

Method Details

reset

public void reset(int codeLength)

Resets the accumulated code changes for a given anticipated maximum code length. If necessary, the size may still be extended while editing the code, with extend(int).

Parameters:

codeLength - the length of the code that will be edited next.

extend

public void extend(int codeLength)

Extends the size of the accumulated code.

Parameters:

codeLength - the length of the code that will be edited next.

visitSimpleInstruction

public void visitSimpleInstruction(Clazz clazz,
 Method method,
 CodeAttribute codeAttribute,
 int offset,
 SimpleInstruction simpleInstruction)

Specified by:

visitSimpleInstruction in interface InstructionVisitor

visitConstantInstruction

public void visitConstantInstruction(Clazz clazz,
 Method method,
 CodeAttribute codeAttribute,
 int offset,
 ConstantInstruction constantInstruction)

Specified by:

visitConstantInstruction in interface InstructionVisitor

visitVariableInstruction

public void visitVariableInstruction(Clazz clazz,
 Method method,
 CodeAttribute codeAttribute,
 int offset,
 VariableInstruction variableInstruction)

Specified by:

visitVariableInstruction in interface InstructionVisitor

visitBranchInstruction

public void visitBranchInstruction(Clazz clazz,
 Method method,
 CodeAttribute codeAttribute,
 int offset,
 BranchInstruction branchInstruction)

Specified by:

visitBranchInstruction in interface InstructionVisitor

visitAnySwitchInstruction

public void visitAnySwitchInstruction(Clazz clazz,
 Method method,
 CodeAttribute codeAttribute,
 int offset,
 SwitchInstruction switchInstruction)

Description copied from interface: InstructionVisitor

Visits any SwitchInstruction instance. The more specific default implementations of this interface delegate to this method.

Specified by:

visitAnySwitchInstruction in interface InstructionVisitor

visitCodeAttribute

public void visitCodeAttribute(Clazz clazz,
 Method method,
 CodeAttribute codeAttribute)

Specified by:

visitCodeAttribute in interface AttributeVisitor