org.objectweb.asm.util
Class PrintCodeVisitor

java.lang.Object
  |
  +--org.objectweb.asm.util.PrintCodeVisitor
All Implemented Interfaces:
CodeVisitor
Direct Known Subclasses:
DumpCodeVisitor, TraceCodeVisitor

public abstract class PrintCodeVisitor
extends Object
implements CodeVisitor

An abstract code visitor that prints the code it visits.


Field Summary
protected  StringBuffer buf
           
protected  ArrayList dump
           
protected static String[] OPCODES
           
 
Constructor Summary
PrintCodeVisitor()
          Constructs a new PrintCodeVisitor object.
 
Method Summary
 ArrayList getText()
           
abstract  void printFieldInsn(int opcode, String owner, String name, String desc)
           
abstract  void printIincInsn(int var, int increment)
           
abstract  void printInsn(int opcode)
           
abstract  void printIntInsn(int opcode, int operand)
           
abstract  void printJumpInsn(int opcode, Label label)
           
abstract  void printLabel(Label label)
           
abstract  void printLdcInsn(Object cst)
           
abstract  void printLineNumber(int line, Label start)
           
abstract  void printLocalVariable(String name, String desc, Label start, Label end, int index)
           
abstract  void printLookupSwitchInsn(Label dflt, int[] keys, Label[] labels)
           
abstract  void printMaxs(int maxStack, int maxLocals)
           
abstract  void printMethodInsn(int opcode, String owner, String name, String desc)
           
abstract  void printMultiANewArrayInsn(String desc, int dims)
           
abstract  void printTableSwitchInsn(int min, int max, Label dflt, Label[] labels)
           
abstract  void printTryCatchBlock(Label start, Label end, Label handler, String type)
           
abstract  void printTypeInsn(int opcode, String desc)
           
abstract  void printVarInsn(int opcode, int var)
           
 void visitFieldInsn(int opcode, String owner, String name, String desc)
          Visits a field instruction.
 void visitIincInsn(int var, int increment)
          Visits an IINC instruction.
 void visitInsn(int opcode)
          Visits a zero operand instruction.
 void visitIntInsn(int opcode, int operand)
          Visits an instruction with a single int operand.
 void visitJumpInsn(int opcode, Label label)
          Visits a jump instruction.
 void visitLabel(Label label)
          Visits a label.
 void visitLdcInsn(Object cst)
          Visits a LDC instruction.
 void visitLineNumber(int line, Label start)
          Visits a line number declaration.
 void visitLocalVariable(String name, String desc, Label start, Label end, int index)
          Visits a local variable declaration.
 void visitLookupSwitchInsn(Label dflt, int[] keys, Label[] labels)
          Visits a LOOKUPSWITCH instruction.
 void visitMaxs(int maxStack, int maxLocals)
          Visits the maximum stack size and the maximum number of local variables of the method.
 void visitMethodInsn(int opcode, String owner, String name, String desc)
          Visits a method instruction.
 void visitMultiANewArrayInsn(String desc, int dims)
          Visits a MULTIANEWARRAY instruction.
 void visitTableSwitchInsn(int min, int max, Label dflt, Label[] labels)
          Visits a TABLESWITCH instruction.
 void visitTryCatchBlock(Label start, Label end, Label handler, String type)
          Visits a try catch block.
 void visitTypeInsn(int opcode, String desc)
          Visits a type instruction.
 void visitVarInsn(int opcode, int var)
          Visits a local variable instruction.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

buf

protected final StringBuffer buf

dump

protected final ArrayList dump

OPCODES

protected static final String[] OPCODES
Constructor Detail

PrintCodeVisitor

public PrintCodeVisitor()
Constructs a new PrintCodeVisitor object.
Method Detail

visitInsn

public void visitInsn(int opcode)
Description copied from interface: CodeVisitor
Visits a zero operand instruction.
Specified by:
visitInsn in interface CodeVisitor
Following copied from interface: org.objectweb.asm.CodeVisitor
Parameters:
opcode - the opcode of the instruction to be visited. This opcode is either NOP, ACONST_NULL, ICONST_M1, ICONST_0, ICONST_1, ICONST_2, ICONST_3, ICONST_4, ICONST_5, LCONST_0, LCONST_1, FCONST_0, FCONST_1, FCONST_2, DCONST_0, DCONST_1, IALOAD, LALOAD, FALOAD, DALOAD, AALOAD, BALOAD, CALOAD, SALOAD, IASTORE, LASTORE, FASTORE, DASTORE, AASTORE, BASTORE, CASTORE, SASTORE, POP, POP2, DUP, DUP_X1, DUP_X2, DUP2, DUP2_X1, DUP2_X2, SWAP, IADD, LADD, FADD, DADD, ISUB, LSUB, FSUB, DSUB, IMUL, LMUL, FMUL, DMUL, IDIV, LDIV, FDIV, DDIV, IREM, LREM, FREM, DREM, INEG, LNEG, FNEG, DNEG, ISHL, LSHL, ISHR, LSHR, IUSHR, LUSHR, IAND, LAND, IOR, LOR, IXOR, LXOR, I2L, I2F, I2D, L2I, L2F, L2D, F2I, F2L, F2D, D2I, D2L, D2F, I2B, I2C, I2S, LCMP, FCMPL, FCMPG, DCMPL, DCMPG, IRETURN, LRETURN, FRETURN, DRETURN, ARETURN, RETURN, ARRAYLENGTH, ATHROW, MONITORENTER, or MONITOREXIT.

visitIntInsn

public void visitIntInsn(int opcode,
                         int operand)
Description copied from interface: CodeVisitor
Visits an instruction with a single int operand.
Specified by:
visitIntInsn in interface CodeVisitor
Following copied from interface: org.objectweb.asm.CodeVisitor
Parameters:
opcode - the opcode of the instruction to be visited. This opcode is either BIPUSH, SIPUSH or NEWARRAY.
operand - the operand of the instruction to be visited.

visitVarInsn

public void visitVarInsn(int opcode,
                         int var)
Description copied from interface: CodeVisitor
Visits a local variable instruction. A local variable instruction is an instruction that loads or stores the value of a local variable.
Specified by:
visitVarInsn in interface CodeVisitor
Following copied from interface: org.objectweb.asm.CodeVisitor
Parameters:
opcode - the opcode of the local variable instruction to be visited. This opcode is either ILOAD, LLOAD, FLOAD, DLOAD, ALOAD, ISTORE, LSTORE, FSTORE, DSTORE, ASTORE or RET.
var - the operand of the instuction to be visited. This operand is the index of a local variable.

visitTypeInsn

public void visitTypeInsn(int opcode,
                          String desc)
Description copied from interface: CodeVisitor
Visits a type instruction. A type instruction is an instruction that takes a type descriptor as parameter.
Specified by:
visitTypeInsn in interface CodeVisitor
Following copied from interface: org.objectweb.asm.CodeVisitor
Parameters:
opcode - the opcode of the type instruction to be visited. This opcode is either NEW, ANEWARRAY, CHECKCAST or INSTANCEOF.
desc - the operand of the instuction to be visited. This operand is a type descriptor (see Type).

visitFieldInsn

public void visitFieldInsn(int opcode,
                           String owner,
                           String name,
                           String desc)
Description copied from interface: CodeVisitor
Visits a field instruction. A field instruction is an instruction that loads or stores the value of a field of an object.
Specified by:
visitFieldInsn in interface CodeVisitor
Following copied from interface: org.objectweb.asm.CodeVisitor
Parameters:
opcode - the opcode of the type instruction to be visited. This opcode is either GETSTATIC, PUTSTATIC, GETFIELD or PUTFIELD.
owner - the internal name of the field's owner class (see getInternalName).
name - the field's name.
desc - the field's descriptor (see Type).

visitMethodInsn

public void visitMethodInsn(int opcode,
                            String owner,
                            String name,
                            String desc)
Description copied from interface: CodeVisitor
Visits a method instruction. A method instruction is an instruction that invokes a method.
Specified by:
visitMethodInsn in interface CodeVisitor
Following copied from interface: org.objectweb.asm.CodeVisitor
Parameters:
opcode - the opcode of the type instruction to be visited. This opcode is either INVOKEVIRTUAL, INVOKESPECIAL, INVOKESTATIC or INVOKEINTERFACE.
owner - the internal name of the method's owner class (see getInternalName).
name - the method's name.
desc - the method's descriptor (see Type).

visitJumpInsn

public void visitJumpInsn(int opcode,
                          Label label)
Description copied from interface: CodeVisitor
Visits a jump instruction. A jump instruction is an instruction that may jump to another instruction.
Specified by:
visitJumpInsn in interface CodeVisitor
Following copied from interface: org.objectweb.asm.CodeVisitor
Parameters:
opcode - the opcode of the type instruction to be visited. This opcode is either IFEQ, IFNE, IFLT, IFGE, IFGT, IFLE, IF_ICMPEQ, IF_ICMPNE, IF_ICMPLT, IF_ICMPGE, IF_ICMPGT, IF_ICMPLE, IF_ACMPEQ, IF_ACMPNE, GOTO, JSR, IFNULL or IFNONNULL.
label - the operand of the instuction to be visited. This operand is a label that designates the instruction to which the jump instruction may jump.

visitLabel

public void visitLabel(Label label)
Description copied from interface: CodeVisitor
Visits a label. A label designates the instruction that will be visited just after it.
Specified by:
visitLabel in interface CodeVisitor
Following copied from interface: org.objectweb.asm.CodeVisitor
Parameters:
label - a Label object.

visitLdcInsn

public void visitLdcInsn(Object cst)
Description copied from interface: CodeVisitor
Visits a LDC instruction.
Specified by:
visitLdcInsn in interface CodeVisitor
Following copied from interface: org.objectweb.asm.CodeVisitor
Parameters:
cst - the constant to be loaded on the stack. This parameter must be a non null Integer, a Float, a Long, a Double or a String.

visitIincInsn

public void visitIincInsn(int var,
                          int increment)
Description copied from interface: CodeVisitor
Visits an IINC instruction.
Specified by:
visitIincInsn in interface CodeVisitor
Following copied from interface: org.objectweb.asm.CodeVisitor
Parameters:
var - index of the local variable to be incremented.
increment - amount to increment the local variable by.

visitTableSwitchInsn

public void visitTableSwitchInsn(int min,
                                 int max,
                                 Label dflt,
                                 Label[] labels)
Description copied from interface: CodeVisitor
Visits a TABLESWITCH instruction.
Specified by:
visitTableSwitchInsn in interface CodeVisitor
Following copied from interface: org.objectweb.asm.CodeVisitor
Parameters:
min - the minimum key value.
max - the maximum key value.
dflt - beginning of the default handler block.
labels - beginnings of the handler blocks. labels[i] is the beginning of the handler block for the keys[i] key.

visitLookupSwitchInsn

public void visitLookupSwitchInsn(Label dflt,
                                  int[] keys,
                                  Label[] labels)
Description copied from interface: CodeVisitor
Visits a LOOKUPSWITCH instruction.
Specified by:
visitLookupSwitchInsn in interface CodeVisitor
Following copied from interface: org.objectweb.asm.CodeVisitor
Parameters:
dflt - beginning of the default handler block.
keys - the values of the keys.
labels - beginnings of the handler blocks. labels[i] is the beginning of the handler block for the keys[i] key.

visitMultiANewArrayInsn

public void visitMultiANewArrayInsn(String desc,
                                    int dims)
Description copied from interface: CodeVisitor
Visits a MULTIANEWARRAY instruction.
Specified by:
visitMultiANewArrayInsn in interface CodeVisitor
Following copied from interface: org.objectweb.asm.CodeVisitor
Parameters:
desc - an array type descriptor (see Type).
dims - number of dimensions of the array to allocate.

visitTryCatchBlock

public void visitTryCatchBlock(Label start,
                               Label end,
                               Label handler,
                               String type)
Description copied from interface: CodeVisitor
Visits a try catch block.
Specified by:
visitTryCatchBlock in interface CodeVisitor
Following copied from interface: org.objectweb.asm.CodeVisitor
Parameters:
start - beginning of the exception handler's scope (inclusive).
end - end of the exception handler's scope (exclusive).
handler - beginning of the exception handler's code.
type - name of the type of exceptions handled by the handler, or null to catch any exceptions (for "finally" blocks).
Throws:
IllegalArgumentException - if one of the labels has not already been visited by this visitor (by the visitLabel method).

visitMaxs

public void visitMaxs(int maxStack,
                      int maxLocals)
Description copied from interface: CodeVisitor
Visits the maximum stack size and the maximum number of local variables of the method.
Specified by:
visitMaxs in interface CodeVisitor
Following copied from interface: org.objectweb.asm.CodeVisitor
Parameters:
maxStack - maximum stack size of the method.
maxLocals - maximum number of local variables for the method.

visitLocalVariable

public void visitLocalVariable(String name,
                               String desc,
                               Label start,
                               Label end,
                               int index)
Description copied from interface: CodeVisitor
Visits a local variable declaration.
Specified by:
visitLocalVariable in interface CodeVisitor
Following copied from interface: org.objectweb.asm.CodeVisitor
Parameters:
name - the name of a local variable.
desc - the type descriptor of this local variable.
start - the first instruction corresponding to the scope of this local variable (inclusive).
end - the last instruction corresponding to the scope of this local variable (exclusive).
index - the local variable's index.
Throws:
IllegalArgumentException - if one of the labels has not already been visited by this visitor (by the visitLabel method).

visitLineNumber

public void visitLineNumber(int line,
                            Label start)
Description copied from interface: CodeVisitor
Visits a line number declaration.
Specified by:
visitLineNumber in interface CodeVisitor
Following copied from interface: org.objectweb.asm.CodeVisitor
Parameters:
line - a line number. This number refers to the source file from which the class was compiled.
start - the first instruction corresponding to this line number.
Throws:
IllegalArgumentException - if start has not already been visited by this visitor (by the visitLabel method).

getText

public ArrayList getText()

printInsn

public abstract void printInsn(int opcode)

printIntInsn

public abstract void printIntInsn(int opcode,
                                  int operand)

printVarInsn

public abstract void printVarInsn(int opcode,
                                  int var)

printTypeInsn

public abstract void printTypeInsn(int opcode,
                                   String desc)

printFieldInsn

public abstract void printFieldInsn(int opcode,
                                    String owner,
                                    String name,
                                    String desc)

printMethodInsn

public abstract void printMethodInsn(int opcode,
                                     String owner,
                                     String name,
                                     String desc)

printJumpInsn

public abstract void printJumpInsn(int opcode,
                                   Label label)

printLabel

public abstract void printLabel(Label label)

printLdcInsn

public abstract void printLdcInsn(Object cst)

printIincInsn

public abstract void printIincInsn(int var,
                                   int increment)

printTableSwitchInsn

public abstract void printTableSwitchInsn(int min,
                                          int max,
                                          Label dflt,
                                          Label[] labels)

printLookupSwitchInsn

public abstract void printLookupSwitchInsn(Label dflt,
                                           int[] keys,
                                           Label[] labels)

printMultiANewArrayInsn

public abstract void printMultiANewArrayInsn(String desc,
                                             int dims)

printTryCatchBlock

public abstract void printTryCatchBlock(Label start,
                                        Label end,
                                        Label handler,
                                        String type)

printMaxs

public abstract void printMaxs(int maxStack,
                               int maxLocals)

printLocalVariable

public abstract void printLocalVariable(String name,
                                        String desc,
                                        Label start,
                                        Label end,
                                        int index)

printLineNumber

public abstract void printLineNumber(int line,
                                     Label start)