org.objectweb.asm.util
Class CheckMethodAdapter

java.lang.Object
  extended byorg.objectweb.asm.MethodAdapter
      extended byorg.objectweb.asm.util.CheckMethodAdapter
All Implemented Interfaces:
MethodVisitor

public class CheckMethodAdapter
extends MethodAdapter

A MethodAdapter that checks that its methods are properly used. More precisely this code adapter checks each instruction individually (i.e., each visit method checks some preconditions based only on its arguments - such as the fact that the given opcode is correct for a given visit method), but does not check the sequence of instructions. For example, in a method whose signature is void m (), the invalid instruction IRETURN, or the invalid sequence IADD L2I will not be detected by this code adapter.

Author:
Eric Bruneton

Field Summary
 
Fields inherited from class org.objectweb.asm.MethodAdapter
mv
 
Constructor Summary
CheckMethodAdapter(MethodVisitor cv)
          Constructs a new CheckMethodAdapter object.
 
Method Summary
 AnnotationVisitor visitAnnotation(String desc, boolean visible)
          Visits an annotation of this method.
 AnnotationVisitor visitAnnotationDefault()
          Visits the default value of this annotation interface method.
 void visitAttribute(Attribute attr)
          Visits a non standard attribute of this method.
 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, String signature, 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.
 AnnotationVisitor visitParameterAnnotation(int parameter, String desc, boolean visible)
          Visits an annotation of a parameter this method.
 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 org.objectweb.asm.MethodAdapter
visitCode, visitEnd
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

CheckMethodAdapter

public CheckMethodAdapter(MethodVisitor cv)
Constructs a new CheckMethodAdapter object.

Parameters:
cv - the code visitor to which this adapter must delegate calls.
Method Detail

visitAnnotation

public AnnotationVisitor visitAnnotation(String desc,
                                         boolean visible)
Description copied from interface: MethodVisitor
Visits an annotation of this method.

Specified by:
visitAnnotation in interface MethodVisitor
Overrides:
visitAnnotation in class MethodAdapter

visitAnnotationDefault

public AnnotationVisitor visitAnnotationDefault()
Description copied from interface: MethodVisitor
Visits the default value of this annotation interface method.

Specified by:
visitAnnotationDefault in interface MethodVisitor
Overrides:
visitAnnotationDefault in class MethodAdapter

visitParameterAnnotation

public AnnotationVisitor visitParameterAnnotation(int parameter,
                                                  String desc,
                                                  boolean visible)
Description copied from interface: MethodVisitor
Visits an annotation of a parameter this method.

Specified by:
visitParameterAnnotation in interface MethodVisitor
Overrides:
visitParameterAnnotation in class MethodAdapter

visitAttribute

public void visitAttribute(Attribute attr)
Description copied from interface: MethodVisitor
Visits a non standard attribute of this method.

Specified by:
visitAttribute in interface MethodVisitor
Overrides:
visitAttribute in class MethodAdapter

visitInsn

public void visitInsn(int opcode)
Description copied from interface: MethodVisitor
Visits a zero operand instruction.

Specified by:
visitInsn in interface MethodVisitor
Overrides:
visitInsn in class MethodAdapter

visitIntInsn

public void visitIntInsn(int opcode,
                         int operand)
Description copied from interface: MethodVisitor
Visits an instruction with a single int operand.

Specified by:
visitIntInsn in interface MethodVisitor
Overrides:
visitIntInsn in class MethodAdapter

visitVarInsn

public void visitVarInsn(int opcode,
                         int var)
Description copied from interface: MethodVisitor
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 MethodVisitor
Overrides:
visitVarInsn in class MethodAdapter

visitTypeInsn

public void visitTypeInsn(int opcode,
                          String desc)
Description copied from interface: MethodVisitor
Visits a type instruction. A type instruction is an instruction that takes a type descriptor as parameter.

Specified by:
visitTypeInsn in interface MethodVisitor
Overrides:
visitTypeInsn in class MethodAdapter

visitFieldInsn

public void visitFieldInsn(int opcode,
                           String owner,
                           String name,
                           String desc)
Description copied from interface: MethodVisitor
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 MethodVisitor
Overrides:
visitFieldInsn in class MethodAdapter

visitMethodInsn

public void visitMethodInsn(int opcode,
                            String owner,
                            String name,
                            String desc)
Description copied from interface: MethodVisitor
Visits a method instruction. A method instruction is an instruction that invokes a method.

Specified by:
visitMethodInsn in interface MethodVisitor
Overrides:
visitMethodInsn in class MethodAdapter

visitJumpInsn

public void visitJumpInsn(int opcode,
                          Label label)
Description copied from interface: MethodVisitor
Visits a jump instruction. A jump instruction is an instruction that may jump to another instruction.

Specified by:
visitJumpInsn in interface MethodVisitor
Overrides:
visitJumpInsn in class MethodAdapter

visitLabel

public void visitLabel(Label label)
Description copied from interface: MethodVisitor
Visits a label. A label designates the instruction that will be visited just after it.

Specified by:
visitLabel in interface MethodVisitor
Overrides:
visitLabel in class MethodAdapter

visitLdcInsn

public void visitLdcInsn(Object cst)
Description copied from interface: MethodVisitor
Visits a LDC instruction.

Specified by:
visitLdcInsn in interface MethodVisitor
Overrides:
visitLdcInsn in class MethodAdapter

visitIincInsn

public void visitIincInsn(int var,
                          int increment)
Description copied from interface: MethodVisitor
Visits an IINC instruction.

Specified by:
visitIincInsn in interface MethodVisitor
Overrides:
visitIincInsn in class MethodAdapter

visitTableSwitchInsn

public void visitTableSwitchInsn(int min,
                                 int max,
                                 Label dflt,
                                 Label[] labels)
Description copied from interface: MethodVisitor
Visits a TABLESWITCH instruction.

Specified by:
visitTableSwitchInsn in interface MethodVisitor
Overrides:
visitTableSwitchInsn in class MethodAdapter

visitLookupSwitchInsn

public void visitLookupSwitchInsn(Label dflt,
                                  int[] keys,
                                  Label[] labels)
Description copied from interface: MethodVisitor
Visits a LOOKUPSWITCH instruction.

Specified by:
visitLookupSwitchInsn in interface MethodVisitor
Overrides:
visitLookupSwitchInsn in class MethodAdapter

visitMultiANewArrayInsn

public void visitMultiANewArrayInsn(String desc,
                                    int dims)
Description copied from interface: MethodVisitor
Visits a MULTIANEWARRAY instruction.

Specified by:
visitMultiANewArrayInsn in interface MethodVisitor
Overrides:
visitMultiANewArrayInsn in class MethodAdapter

visitTryCatchBlock

public void visitTryCatchBlock(Label start,
                               Label end,
                               Label handler,
                               String type)
Description copied from interface: MethodVisitor
Visits a try catch block.

Specified by:
visitTryCatchBlock in interface MethodVisitor
Overrides:
visitTryCatchBlock in class MethodAdapter

visitLocalVariable

public void visitLocalVariable(String name,
                               String desc,
                               String signature,
                               Label start,
                               Label end,
                               int index)
Description copied from interface: MethodVisitor
Visits a local variable declaration.

Specified by:
visitLocalVariable in interface MethodVisitor
Overrides:
visitLocalVariable in class MethodAdapter

visitLineNumber

public void visitLineNumber(int line,
                            Label start)
Description copied from interface: MethodVisitor
Visits a line number declaration.

Specified by:
visitLineNumber in interface MethodVisitor
Overrides:
visitLineNumber in class MethodAdapter

visitMaxs

public void visitMaxs(int maxStack,
                      int maxLocals)
Description copied from interface: MethodVisitor
Visits the maximum stack size and the maximum number of local variables of the method.

Specified by:
visitMaxs in interface MethodVisitor
Overrides:
visitMaxs in class MethodAdapter