Package org.eolang.jeo.representation.bytecode

Class BytecodeFrame

java.lang.Object

org.eolang.jeo.representation.bytecode.BytecodeFrame

All Implemented Interfaces:

BytecodeEntry

public final class BytecodeFrame
extends Object
implements BytecodeEntry

Bytecode frame.

Since:

0.6

Constructor Summary

Constructors

Constructor	Description
BytecodeFrame(int type, int nlocal, Object[] locals, int nstack, Object... stack)	Constructor.
BytecodeFrame(int type, List<Object> locals, List<Object> stack)	Constructor.

Method Summary

Modifier and Type	Method	Description
Iterable<org.xembly.Directive>	directives(boolean counting)	Convert entry to directives.
int	impact()	Impact of the instruction on the stack.
boolean	isIf()	Is this instruction a conditional branch?
boolean	isJump()	Is this instruction a goto? 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 statement?
boolean	isSwitch()	Is this instruction a switch?
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

BytecodeFrame

public BytecodeFrame(int type,
                     List<Object> locals,
                     List<Object> stack)

Constructor.

Parameters:

type - Frame type.

locals - Local variables.

stack - Stack elements.

BytecodeFrame

public BytecodeFrame(int type,
                     int nlocal,
                     Object[] locals,
                     int nstack,
                     Object... stack)

Constructor.

Parameters:

type - Frame type.

nlocal - Number of local variables.

locals - Local variables.

nstack - Number of stack elements.

stack - Stack elements.

Suppressed Checkstyle violations:

ParameterNumberCheck (5 lines)

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.

isSwitch

public boolean isSwitch()

Description copied from interface: BytecodeEntry

Is this instruction a switch?

Specified by:

isSwitch in interface BytecodeEntry

Returns:

True if it is.

isJump

public boolean isJump()

Description copied from interface: BytecodeEntry

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

Specified by:

isJump in interface BytecodeEntry

Returns:

True if it is.

isIf

public boolean isIf()

Description copied from interface: BytecodeEntry

Is this instruction a conditional branch?

Specified by:

isIf in interface BytecodeEntry

Returns:

True if it is.

isReturn

public boolean isReturn()

Description copied from interface: BytecodeEntry

Is this instruction a return statement?

Specified by:

isReturn in interface BytecodeEntry

Returns:

True if it is.

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.

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()

Description copied from interface: BytecodeEntry

Impact of the instruction on the stack.

Specified by:

impact in interface BytecodeEntry

Returns:

Stack impact.

jumps

public List<BytecodeLabel> jumps()

Description copied from interface: BytecodeEntry

Jump to a label. Where to jump.

Specified by:

jumps in interface BytecodeEntry

Returns:

Jumps.

view

public String view()

Description copied from interface: BytecodeEntry

Human-readable representation.

Specified by:

view in interface BytecodeEntry

Returns:

Text.