javassist.bytecode

Class StackMapTable.Writer

java.lang.Object

javassist.bytecode.StackMapTable.Writer

Enclosing class:

StackMapTable

public static class StackMapTable.Writer
extends java.lang.Object

A writer of stack map tables.

Constructor Summary

Constructors

Constructor and Description
Writer(int size) Constructs a writer.

Method Summary

Modifier and Type	Method and Description
void	appendFrame(int offsetDelta, int[] tags, int[] data) Writes a append_frame.
void	chopFrame(int offsetDelta, int k) Writes a chop_frame.
void	fullFrame(int offsetDelta, int[] localTags, int[] localData, int[] stackTags, int[] stackData) Writes a full_frame.
void	sameFrame(int offsetDelta) Writes a same_frame or a same_frame_extended.
void	sameLocals(int offsetDelta, int tag, int data) Writes a same_locals_1_stack_item or a same_locals_1_stack_item_extended.
byte[]	toByteArray() Returns the stack map table written out.
StackMapTable	toStackMapTable(ConstPool cp) Constructs and a return a stack map table containing the written stack map entries.

Methods inherited from class java.lang.Object

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

Constructor Detail

Writer

public Writer(int size)

Constructs a writer.

Parameters:

size - the initial buffer size.

Method Detail

toByteArray

public byte[] toByteArray()

Returns the stack map table written out.

toStackMapTable

public StackMapTable toStackMapTable(ConstPool cp)

Constructs and a return a stack map table containing the written stack map entries.

Parameters:

cp - the constant pool used to write the stack map entries.

sameFrame

public void sameFrame(int offsetDelta)

Writes a same_frame or a same_frame_extended.

sameLocals

public void sameLocals(int offsetDelta,
                       int tag,
                       int data)

Writes a same_locals_1_stack_item or a same_locals_1_stack_item_extended.

Parameters:

tag - stack[0].tag.

data - stack[0].cpool_index if the tag is OBJECT, or stack[0].offset if the tag is UNINIT. Otherwise, this parameter is not used.

chopFrame

public void chopFrame(int offsetDelta,
                      int k)

Writes a chop_frame.

Parameters:

k - the number of absent locals. 1, 2, or 3.

appendFrame

public void appendFrame(int offsetDelta,
                        int[] tags,
                        int[] data)

Writes a append_frame. The number of the appended locals is specified by the length of tags.

Parameters:

tags - locals[].tag. The length of this array must be either 1, 2, or 3.

data - locals[].cpool_index if the tag is OBJECT, or locals[].offset if the tag is UNINIT. Otherwise, this parameter is not used.

fullFrame

public void fullFrame(int offsetDelta,
                      int[] localTags,
                      int[] localData,
                      int[] stackTags,
                      int[] stackData)

Writes a full_frame. number_of_locals and number_of_stack_items are specified by the the length of localTags and stackTags.

Parameters:

localTags - locals[].tag.

localData - locals[].cpool_index if the tag is OBJECT, or locals[].offset if the tag is UNINIT. Otherwise, this parameter is not used.

stackTags - stack[].tag.

stackData - stack[].cpool_index if the tag is OBJECT, or stack[].offset if the tag is UNINIT. Otherwise, this parameter is not used.