Package serp.bytecode
Class ConvertInstruction
- java.lang.Object
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- serp.bytecode.Instruction
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- serp.bytecode.TypedInstruction
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- serp.bytecode.ConvertInstruction
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- All Implemented Interfaces:
BCEntity
,VisitAcceptor
public class ConvertInstruction extends TypedInstruction
A conversion opcode such asi2l, f2i
, etc. Changing the types of the instruction will automatically update the underlying opcode. Converting from one type to the same type will result in anop
.- Author:
- Abe White
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
acceptVisit(BCVisitor visit)
Accept a visit from aBCVisitor
, calling the appropriate methods to notify the visitor that it has entered this entity, and to provide it with the proper callbacks for each sub-entity owned by this one.boolean
equalsInstruction(Instruction other)
ConvertInstructions are equal if the types they convert between are either equal or unset.java.lang.Class
getFromType()
Return theClass
of the type being converted from.BCClass
getFromTypeBC()
Return the bytecode of the type being converted from.java.lang.String
getFromTypeName()
Return the name of the type being converted from.int
getLogicalStackChange()
Return the logical number of stack positions changed by this instruction.int
getStackChange()
Return the number of stack positions this instruction pushes or pops during its execution.java.lang.String
getTypeName()
Return the type name for this instruction.ConvertInstruction
setFromType(java.lang.Class type)
Set the type being converted from.ConvertInstruction
setFromType(java.lang.String type)
Set the type being converted from.ConvertInstruction
setFromType(BCClass type)
Set the type being converted from.TypedInstruction
setType(java.lang.String type)
Set the type of this instruction.-
Methods inherited from class serp.bytecode.TypedInstruction
getType, getTypeBC, setType, setType
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Methods inherited from class serp.bytecode.Instruction
getByteIndex, getClassLoader, getCode, getLineNumber, getName, getOpcode, getPool, getProject, isValid
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Method Detail
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getLogicalStackChange
public int getLogicalStackChange()
Description copied from class:Instruction
Return the logical number of stack positions changed by this instruction. In other words, ignore weirdness with longs and doubles taking two stack positions.- Overrides:
getLogicalStackChange
in classInstruction
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getStackChange
public int getStackChange()
Description copied from class:Instruction
Return the number of stack positions this instruction pushes or pops during its execution.- Overrides:
getStackChange
in classInstruction
- Returns:
- 0 if the stack is not affected by this instruction, a positive number if it pushes onto the stack, and a negative number if it pops from the stack
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getTypeName
public java.lang.String getTypeName()
Description copied from class:TypedInstruction
Return the type name for this instruction. If the type has not been set, this method will return null.- Specified by:
getTypeName
in classTypedInstruction
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setType
public TypedInstruction setType(java.lang.String type)
Description copied from class:TypedInstruction
Set the type of this instruction. Types that have no direct support will be converted accordingly.- Specified by:
setType
in classTypedInstruction
- Returns:
- this instruction, for method chaining
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getFromTypeName
public java.lang.String getFromTypeName()
Return the name of the type being converted from. If neither type has been set, this method will return null.
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getFromType
public java.lang.Class getFromType()
Return theClass
of the type being converted from. If neither type has been set, this method will return null.
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getFromTypeBC
public BCClass getFromTypeBC()
Return the bytecode of the type being converted from. If neither type has been set, this method will return null.
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setFromType
public ConvertInstruction setFromType(java.lang.String type)
Set the type being converted from. Types that have no direct support will be converted accordingly.- Returns:
- this instruction, for method chaining
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setFromType
public ConvertInstruction setFromType(java.lang.Class type)
Set the type being converted from. Types that have no direct support will be converted accordingly.- Returns:
- this instruction, for method chaining
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setFromType
public ConvertInstruction setFromType(BCClass type)
Set the type being converted from. Types that have no direct support will be converted accordingly.- Returns:
- this instruction, for method chaining
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equalsInstruction
public boolean equalsInstruction(Instruction other)
ConvertInstructions are equal if the types they convert between are either equal or unset.- Overrides:
equalsInstruction
in classInstruction
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acceptVisit
public void acceptVisit(BCVisitor visit)
Description copied from interface:VisitAcceptor
Accept a visit from aBCVisitor
, calling the appropriate methods to notify the visitor that it has entered this entity, and to provide it with the proper callbacks for each sub-entity owned by this one.- Specified by:
acceptVisit
in interfaceVisitAcceptor
- Overrides:
acceptVisit
in classInstruction
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