Package org.biojava.utils.bytecode
Class InstructionVector
java.lang.Object
org.biojava.utils.bytecode.InstructionVector
- All Implemented Interfaces:
CodeGenerator
A list of Instructions and/or other CodeGenerator objects.
- Author:
- Thomas Down, Matthew Pocock
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionvoid
add
(int pos, CodeGenerator g) void
add
(CodeGenerator g) generatorAt
(int pos) void
remove
(int pos) int
size()
int
Return the change in the stack dept this generator will cause.int
Return the total depth of the stack required by this CodeGenerator.void
writeCode
(CodeContext ctx) Write the byte or bytes for this CodeGenerator to a CodeContext.
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Constructor Details
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InstructionVector
public InstructionVector()
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Method Details
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add
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size
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add
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remove
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generatorAt
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getStartLabel
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getEndLabel
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writeCode
Description copied from interface:CodeGenerator
Write the byte or bytes for this CodeGenerator to a CodeContext.- Specified by:
writeCode
in interfaceCodeGenerator
- Parameters:
ctx
- a CodeContext to write to- Throws:
CodeException
- if there was some failure in writing to the context
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stackDepth
Description copied from interface:CodeGenerator
Return the total depth of the stack required by this CodeGenerator.For single byte-code instructions, this will be the same as stackDelta() if stackDelta() is positive, zero otherwise. For a compound instruction, this will be the maximum stack depth required to execute all sub-instructions.
- Specified by:
stackDepth
in interfaceCodeGenerator
- Returns:
- the stack depth needed
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stackDelta
Description copied from interface:CodeGenerator
Return the change in the stack dept this generator will cause.In the case of an instruction that adds items to the stack, stackDelta will be positive. For instructions that removes items from the stack, this will be negative.
- Specified by:
stackDelta
in interfaceCodeGenerator
- Returns:
- the change between stack depth before and after execution of this code
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