org.objectweb.asm.optimizer
Class MethodConstantsCollector

java.lang.Object
  extended by org.objectweb.asm.MethodAdapter
      extended by org.objectweb.asm.optimizer.MethodConstantsCollector
All Implemented Interfaces:
MethodVisitor

public class MethodConstantsCollector
extends MethodAdapter

An MethodVisitor that collects the Constants of the methods it visits.

Author:
Eric Bruneton

Field Summary
private  ConstantPool cp
           
 
Fields inherited from class org.objectweb.asm.MethodAdapter
mv
 
Constructor Summary
MethodConstantsCollector(MethodVisitor mv, ConstantPool cp)
           
 
Method Summary
 AnnotationVisitor visitAnnotation(java.lang.String desc, boolean visible)
          Visits an annotation of this method.
 AnnotationVisitor visitAnnotationDefault()
          Visits the default value of this annotation interface method.
 void visitFieldInsn(int opcode, java.lang.String owner, java.lang.String name, java.lang.String desc)
          Visits a field instruction.
 void visitLdcInsn(java.lang.Object cst)
          Visits a LDC instruction.
 void visitLineNumber(int line, Label start)
          Visits a line number declaration.
 void visitLocalVariable(java.lang.String name, java.lang.String desc, java.lang.String signature, Label start, Label end, int index)
          Visits a local variable declaration.
 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, java.lang.String owner, java.lang.String name, java.lang.String desc)
          Visits a method instruction.
 void visitMultiANewArrayInsn(java.lang.String desc, int dims)
          Visits a MULTIANEWARRAY instruction.
 AnnotationVisitor visitParameterAnnotation(int parameter, java.lang.String desc, boolean visible)
          Visits an annotation of a parameter this method.
 void visitTryCatchBlock(Label start, Label end, Label handler, java.lang.String type)
          Visits a try catch block.
 void visitTypeInsn(int opcode, java.lang.String type)
          Visits a type instruction.
 
Methods inherited from class org.objectweb.asm.MethodAdapter
visitAttribute, visitCode, visitEnd, visitFrame, visitIincInsn, visitInsn, visitIntInsn, visitJumpInsn, visitLabel, visitLookupSwitchInsn, visitTableSwitchInsn, visitVarInsn
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

cp

private final ConstantPool cp
Constructor Detail

MethodConstantsCollector

public MethodConstantsCollector(MethodVisitor mv,
                                ConstantPool cp)
Method Detail

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
Returns:
a visitor to the visit the actual default value of this annotation interface method, or null if this visitor is not interested in visiting this default value. The 'name' parameters passed to the methods of this annotation visitor are ignored. Moreover, exacly one visit method must be called on this annotation visitor, followed by visitEnd.

visitAnnotation

public AnnotationVisitor visitAnnotation(java.lang.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
Parameters:
desc - the class descriptor of the annotation class.
visible - true if the annotation is visible at runtime.
Returns:
a visitor to visit the annotation values, or null if this visitor is not interested in visiting this annotation.

visitParameterAnnotation

public AnnotationVisitor visitParameterAnnotation(int parameter,
                                                  java.lang.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
Parameters:
parameter - the parameter index.
desc - the class descriptor of the annotation class.
visible - true if the annotation is visible at runtime.
Returns:
a visitor to visit the annotation values, or null if this visitor is not interested in visiting this annotation.

visitTypeInsn

public void visitTypeInsn(int opcode,
                          java.lang.String type)
Description copied from interface: MethodVisitor
Visits a type instruction. A type instruction is an instruction that takes the internal name of a class as parameter.

Specified by:
visitTypeInsn in interface MethodVisitor
Overrides:
visitTypeInsn in class MethodAdapter
Parameters:
opcode - the opcode of the type instruction to be visited. This opcode is either NEW, ANEWARRAY, CHECKCAST or INSTANCEOF.
type - the operand of the instruction to be visited. This operand must be the internal name of an object or array class (see getInternalName).

visitFieldInsn

public void visitFieldInsn(int opcode,
                           java.lang.String owner,
                           java.lang.String name,
                           java.lang.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
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,
                            java.lang.String owner,
                            java.lang.String name,
                            java.lang.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
Parameters:
opcode - the opcode of the type instruction to be visited. This opcode is either INVOKEVIRTUAL, INVOKESPECIAL, INVOKESTATIC, INVOKEINTERFACE or INVOKEDYNAMIC.
owner - the internal name of the method's owner class (see getInternalName) or Opcodes.INVOKEDYNAMIC_OWNER.
name - the method's name.
desc - the method's descriptor (see Type).

visitLdcInsn

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

Specified by:
visitLdcInsn in interface MethodVisitor
Overrides:
visitLdcInsn in class MethodAdapter
Parameters:
cst - the constant to be loaded on the stack. This parameter must be a non null Integer, a Float, a Long, a Double a String (or a Type for .class constants, for classes whose version is 49.0 or more).

visitMultiANewArrayInsn

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

Specified by:
visitMultiANewArrayInsn in interface MethodVisitor
Overrides:
visitMultiANewArrayInsn in class MethodAdapter
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,
                               java.lang.String type)
Description copied from interface: MethodVisitor
Visits a try catch block.

Specified by:
visitTryCatchBlock in interface MethodVisitor
Overrides:
visitTryCatchBlock in class MethodAdapter
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 - internal name of the type of exceptions handled by the handler, or null to catch any exceptions (for "finally" blocks).

visitLocalVariable

public void visitLocalVariable(java.lang.String name,
                               java.lang.String desc,
                               java.lang.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
Parameters:
name - the name of a local variable.
desc - the type descriptor of this local variable.
signature - the type signature of this local variable. May be null if the local variable type does not use generic types.
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.

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
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.

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
Parameters:
maxStack - maximum stack size of the method.
maxLocals - maximum number of local variables for the method.