Javassist 3.30.2-GA · javassist.bytecode.analysis.Frame

Modifier and Type	Field and Description
private boolean	jsrMerged
private Type[]	locals
private boolean	retMerged
private Type[]	stack
private int	top

Access	Constructor and Description
public	Frame(int the number of local variable table entries locals, int the maximum stack size stack) Create a new frame with the specified local variable table size, and max stack size

Method Summary

Modifier and Type	Method and Description
public void	clearStack() Empties the stack
public Frame	Returns: the shallow copy copy() Makes a shallow copy of this frame, i.e. the type instances will remain the same.
public Frame	Returns: the shallow copy of the stack copyStack() Makes a shallow copy of the stack portion of this frame.
public Type	Returns: the type if one exists, or null if the position is empty getLocal(int the position in the table index) Returns the local varaible table entry at index.
public Type	Returns: the type of the stack position getStack(int the position on the stack index) Returns the type on the stack at the specified index.
public int	Returns: the position of the element at the top of the stack getTopIndex() Gets the index of the type sitting at the top of the stack.
pack-priv boolean	Returns: true if JSR state has been merged isJsrMerged() Whether or not state from the source JSR instruction has been merged
pack-priv boolean	Returns: true if RET state has been merged isRetMerged() Whether or not state from the RET instruction, of the subroutine that was jumped to has been merged.
public int	Returns: the number of local variable table entries localsLength() Returns the number of local variable table entries, specified at construction.
public boolean	Returns: true if any changes to this frame where made by this merge merge(Frame the frame to merge with frame) Merges all types on the stack and local variable table of this frame with that of the specified type.
public boolean	Returns: true if any changes where made mergeStack(Frame the frame to merge the stack from frame) Merges all types on the stack of this frame instance with that of the specified frame.
public Type	Returns: the top of the stack peek() Gets the top of the stack without altering it
public Type	Returns: the element popped from the stack pop() Alters the stack to contain one less element and return it.
public void	push(Type the type to add to the top type) Alters the stack by placing the passed type on the top
pack-priv void	setJsrMerged(boolean true if merged, otherwise false jsrMerged) Sets whether of not the state from the source JSR instruction has been merged
public void	setLocal(int the position in the table index, Type the type to set at the position type) Sets the local variable table entry at index to a type.
pack-priv void	setRetMerged(boolean true if RET state has been merged retMerged) Sets whether or not state from the RET instruction, of the subroutine that was jumped to has been merged.
public void	setStack(int the position on the stack index, Type the type to set type) Sets the type of the stack position
public String	toString() Overrides java.lang.Object.toString. Returns a string representation of the object.

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll wait wait wait

jsrMerged	back to summary
private boolean jsrMerged

locals	back to summary
private Type[] locals

retMerged	back to summary
private boolean retMerged

stack	back to summary
private Type[] stack

top	back to summary
private int top

Frame	back to summary
public Frame(int locals, int stack) Create a new frame with the specified local variable table size, and max stack size Parameters locals:int the number of local variable table entries stack:int the maximum stack size

Method Detail

clearStack	back to summary
public void clearStack() Empties the stack

copy	back to summary
public Frame copy() Makes a shallow copy of this frame, i.e. the type instances will remain the same. Returns:Frame the shallow copy

copy

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public Frame copy()

Makes a shallow copy of this frame, i.e. the type instances will remain the same.

Returns:Frame: the shallow copy

copyStack	back to summary
public Frame copyStack() Makes a shallow copy of the stack portion of this frame. The local variable table size will be copied, but its contents will be empty. Returns:Frame the shallow copy of the stack

copyStack

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public Frame copyStack()

Makes a shallow copy of the stack portion of this frame. The local variable table size will be copied, but its contents will be empty.

Returns:Frame: the shallow copy of the stack

getLocal	back to summary
public Type getLocal(int index) Returns the local varaible table entry at index. Parameters index:int the position in the table Returns:Type the type if one exists, or null if the position is empty

getLocal

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public Type getLocal(int index)

Returns the local varaible table entry at index.

Parameters

index:int: the position in the table

Returns:Type

the type if one exists, or null if the position is empty

getStack	back to summary
public Type getStack(int index) Returns the type on the stack at the specified index. Parameters index:int the position on the stack Returns:Type the type of the stack position

getStack

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public Type getStack(int index)

Returns the type on the stack at the specified index.

Parameters

index:int: the position on the stack

Returns:Type

the type of the stack position

getTopIndex	back to summary
public int getTopIndex() Gets the index of the type sitting at the top of the stack. This is not to be confused with a length operation which would return the number of elements, not the position of the last element. Returns:int the position of the element at the top of the stack

getTopIndex

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public int getTopIndex()

Gets the index of the type sitting at the top of the stack. This is not to be confused with a length operation which would return the number of elements, not the position of the last element.

Returns:int: the position of the element at the top of the stack

isJsrMerged	back to summary
pack-priv boolean isJsrMerged() Whether or not state from the source JSR instruction has been merged Returns:boolean true if JSR state has been merged

isJsrMerged

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pack-priv boolean isJsrMerged()

Whether or not state from the source JSR instruction has been merged

Returns:boolean: true if JSR state has been merged

isRetMerged	back to summary
pack-priv boolean isRetMerged() Whether or not state from the RET instruction, of the subroutine that was jumped to has been merged. Returns:boolean true if RET state has been merged

isRetMerged

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pack-priv boolean isRetMerged()

Whether or not state from the RET instruction, of the subroutine that was jumped to has been merged.

Returns:boolean: true if RET state has been merged

localsLength	back to summary
public int localsLength() Returns the number of local variable table entries, specified at construction. Returns:int the number of local variable table entries

localsLength

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public int localsLength()

Returns the number of local variable table entries, specified at construction.

Returns:int: the number of local variable table entries

merge	back to summary
public boolean merge(Frame frame) Merges all types on the stack and local variable table of this frame with that of the specified type. Parameters frame:Frame the frame to merge with Returns:boolean true if any changes to this frame where made by this merge

merge

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public boolean merge(Frame frame)

Merges all types on the stack and local variable table of this frame with that of the specified type.

Parameters

frame:Frame: the frame to merge with

Returns:boolean

true if any changes to this frame where made by this merge

mergeStack	back to summary
public boolean mergeStack(Frame frame) Merges all types on the stack of this frame instance with that of the specified frame. The local variable table is left untouched. Parameters frame:Frame the frame to merge the stack from Returns:boolean true if any changes where made

mergeStack

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public boolean mergeStack(Frame frame)

Merges all types on the stack of this frame instance with that of the specified frame. The local variable table is left untouched.

Parameters

frame:Frame: the frame to merge the stack from

Returns:boolean

true if any changes where made

peek	back to summary
public Type peek() Gets the top of the stack without altering it Returns:Type the top of the stack

peek

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public Type peek()

Gets the top of the stack without altering it

Returns:Type: the top of the stack

pop	back to summary
public Type pop() Alters the stack to contain one less element and return it. Returns:Type the element popped from the stack

pop

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public Type pop()

Alters the stack to contain one less element and return it.

Returns:Type: the element popped from the stack

push	back to summary
public void push(Type type) Alters the stack by placing the passed type on the top Parameters type:Type the type to add to the top

push

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public void push(Type type)

Alters the stack by placing the passed type on the top

Parameters

type:Type: the type to add to the top

setJsrMerged	back to summary
pack-priv void setJsrMerged(boolean jsrMerged) Sets whether of not the state from the source JSR instruction has been merged Parameters jsrMerged:boolean true if merged, otherwise false

setJsrMerged

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pack-priv void setJsrMerged(boolean jsrMerged)

Sets whether of not the state from the source JSR instruction has been merged

Parameters

jsrMerged:boolean: true if merged, otherwise false

setLocal	back to summary
public void setLocal(int index, Type type) Sets the local variable table entry at index to a type. Parameters index:int the position in the table type:Type the type to set at the position

setLocal

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public void setLocal(int index, Type type)

Sets the local variable table entry at index to a type.

Parameters

index:int: the position in the table
type:Type: the type to set at the position

setRetMerged	back to summary
pack-priv void setRetMerged(boolean retMerged) Sets whether or not state from the RET instruction, of the subroutine that was jumped to has been merged. Parameters retMerged:boolean true if RET state has been merged

setRetMerged

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pack-priv void setRetMerged(boolean retMerged)

Sets whether or not state from the RET instruction, of the subroutine that was jumped to has been merged.

Parameters

retMerged:boolean: true if RET state has been merged

setStack	back to summary
public void setStack(int index, Type type) Sets the type of the stack position Parameters index:int the position on the stack type:Type the type to set

setStack

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public void setStack(int index, Type type)

Sets the type of the stack position

Parameters

index:int: the position on the stack
type:Type: the type to set

toString back to summary

toString	back to summary
public String toString() Overrides java.lang.Object.toString. Doc from java.lang.Object.toString. Returns a string representation of the object. Satisfying this method's contract implies a non-`null` result must be returned. Returns:String a string representation of the object Annotations @Override

public String toString()

Overrides java.lang.Object.toString.

Doc from java.lang.Object.toString.

Returns a string representation of the object. Satisfying this method's contract implies a non-null result must be returned.

Returns:String

a string representation of the object

Annotations

@Override

public Class Frame

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