Package org.eolang.jeo.representation.bytecode

Class BytecodeInstruction

java.lang.Object

org.eolang.jeo.representation.bytecode.BytecodeInstruction

All Implemented Interfaces:

BytecodeEntry

public final class BytecodeInstruction
extends Object
implements BytecodeEntry

Bytecode instruction.

Since:

0.1

Suppressed Checkstyle violations:

FileLengthCheck (2000 lines)

Constructor Summary

Constructors

Constructor	Description
BytecodeInstruction(int opcode, Object... args)	Constructor.

Method Summary

Modifier and Type	Method	Description
Iterable<org.xembly.Directive>	directives(boolean counting)	Convert entry to directives.
int	impact()	Impact of each instruction on the stack.
boolean	isIf()	Is this instruction a conditional branch instruction?
boolean	isJump()	Is this instruction a jump instruction? Is it a goto or jsr?
boolean	isLabel()	Is this instruction a label?
boolean	isOpcode()	Is this instruction a regular opcode?
boolean	isReturn()	Is this instruction a return instruction?
boolean	isSwitch()	Is this instruction a switch instruction?
boolean	isThrow()	Is this instruction a throw statement?
List<BytecodeLabel>	jumps()	Jump to a label.
String	view()	Human-readable representation.
void	writeTo(org.objectweb.asm.MethodVisitor visitor, AsmLabels labels)	Write instruction to the method visitor.

Methods inherited from class java.lang.Object

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

Constructor Detail

BytecodeInstruction

public BytecodeInstruction(int opcode,
                           Object... args)

Constructor.

Parameters:

opcode - Opcode.

args - Arguments.

Method Detail

writeTo

public void writeTo(org.objectweb.asm.MethodVisitor visitor,
                    AsmLabels labels)

Description copied from interface: BytecodeEntry

Write instruction to the method visitor.

Specified by:

writeTo in interface BytecodeEntry

Parameters:

visitor - Method visitor.

labels - Method labels.

directives

public Iterable<org.xembly.Directive> directives(boolean counting)

Description copied from interface: BytecodeEntry

Convert entry to directives.

Specified by:

directives in interface BytecodeEntry

Parameters:

counting - Do we need to add numbers to entry names?

Returns:

Directives.

isLabel

public boolean isLabel()

Description copied from interface: BytecodeEntry

Is this instruction a label?

Specified by:

isLabel in interface BytecodeEntry

Returns:

True if it is.

isOpcode

public boolean isOpcode()

Description copied from interface: BytecodeEntry

Is this instruction a regular opcode?

Specified by:

isOpcode in interface BytecodeEntry

Returns:

True if it is.

impact

public int impact()

Impact of each instruction on the stack.

Specified by:

impact in interface BytecodeEntry

Returns:

Stack impact.

Suppressed Checkstyle violations:

CyclomaticComplexityCheck (350 lines), MethodLengthCheck (350 lines), JavaNCSSCheck (350 lines), AvoidNestedBlocksCheck (350 lines)

isJump

public boolean isJump()

Is this instruction a jump instruction? Is it a goto or jsr?

Specified by:

isJump in interface BytecodeEntry

Returns:

True if it is.

isIf

public boolean isIf()

Is this instruction a conditional branch instruction?

Specified by:

isIf in interface BytecodeEntry

Returns:

True if it is.

Suppressed Checkstyle violations:

CyclomaticComplexityCheck (100 lines)

isSwitch

public boolean isSwitch()

Is this instruction a switch instruction?

Specified by:

isSwitch in interface BytecodeEntry

Returns:

True if it is.

isReturn

public boolean isReturn()

Is this instruction a return instruction?

Specified by:

isReturn in interface BytecodeEntry

Returns:

True if it is.

jumps

public List<BytecodeLabel> jumps()

Jump to a label. Where to jump.

Specified by:

jumps in interface BytecodeEntry

Returns:

Jump label.

Suppressed Checkstyle violations:

CyclomaticComplexityCheck (100 lines)

view

public String view()

Description copied from interface: BytecodeEntry

Human-readable representation.

Specified by:

view in interface BytecodeEntry

Returns:

Text.

isThrow

public boolean isThrow()

Description copied from interface: BytecodeEntry

Is this instruction a throw statement?

Specified by:

isThrow in interface BytecodeEntry

Returns:

True if it is.