org.mvel2.asm.util

Class Printer

java.lang.Object

org.mvel2.asm.util.Printer

Direct Known Subclasses:

ASMifier, Textifier

public abstract class Printer
extends Object

An abstract converter from visit events to text.

Author:

Eric Bruneton

Field Summary

Fields

Modifier and Type	Field and Description
protected int	api The ASM API version implemented by this class.
protected StringBuffer	buf A buffer that can be used to create strings.
static String[]	HANDLE_TAG The names of the tag field values for Handle.
static String[]	OPCODES The names of the Java Virtual Machine opcodes.
List<Object>	text The text to be printed.
static String[]	TYPES The names of the for operand parameter values of the MethodVisitor.visitIntInsn(int, int) method when opcode is NEWARRAY.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	Printer(int api) Constructs a new Printer.

Method Summary

Methods

Modifier and Type	Method and Description
static void	appendString(StringBuffer buf, String s) Appends a quoted string to a given buffer.
List<Object>	getText() Returns the text constructed by this visitor.
void	print(PrintWriter pw) Prints the text constructed by this visitor.
abstract void	visit(int version, int access, String name, String signature, String superName, String[] interfaces) Class header.
abstract void	visit(String name, Object value) Annotation value.
abstract Printer	visitAnnotation(String name, String desc) Nested annotation value.
abstract Printer	visitAnnotationDefault() Method default annotation.
abstract void	visitAnnotationEnd() Annotation end.
abstract Printer	visitArray(String name) Annotation array value.
abstract Printer	visitClassAnnotation(String desc, boolean visible) Class annotation.
abstract void	visitClassAttribute(Attribute attr) Class attribute.
abstract void	visitClassEnd() Class end.
Printer	visitClassTypeAnnotation(int typeRef, TypePath typePath, String desc, boolean visible) Class type annotation.
abstract void	visitCode() Method start.
abstract void	visitEnum(String name, String desc, String value) Annotation enum value.
abstract Printer	visitField(int access, String name, String desc, String signature, Object value) Class field.
abstract Printer	visitFieldAnnotation(String desc, boolean visible) Field annotation.
abstract void	visitFieldAttribute(Attribute attr) Field attribute.
abstract void	visitFieldEnd() Field end.
abstract void	visitFieldInsn(int opcode, String owner, String name, String desc) Method instruction.
Printer	visitFieldTypeAnnotation(int typeRef, TypePath typePath, String desc, boolean visible) Field type annotation.
abstract void	visitFrame(int type, int nLocal, Object[] local, int nStack, Object[] stack) Method stack frame.
abstract void	visitIincInsn(int var, int increment) Method instruction.
abstract void	visitInnerClass(String name, String outerName, String innerName, int access) Class inner name.
abstract void	visitInsn(int opcode) Method instruction.
Printer	visitInsnAnnotation(int typeRef, TypePath typePath, String desc, boolean visible) Instruction type annotation.
abstract void	visitIntInsn(int opcode, int operand) Method instruction.
abstract void	visitInvokeDynamicInsn(String name, String desc, Handle bsm, Object... bsmArgs) Method instruction.
abstract void	visitJumpInsn(int opcode, Label label) Method instruction.
abstract void	visitLabel(Label label) Method label.
abstract void	visitLdcInsn(Object cst) Method instruction.
abstract void	visitLineNumber(int line, Label start) Method debug info.
abstract void	visitLocalVariable(String name, String desc, String signature, Label start, Label end, int index) Method debug info.
Printer	visitLocalVariableAnnotation(int typeRef, TypePath typePath, Label[] start, Label[] end, int[] index, String desc, boolean visible) Local variable type annotation.
abstract void	visitLookupSwitchInsn(Label dflt, int[] keys, Label[] labels) Method instruction.
abstract void	visitMaxs(int maxStack, int maxLocals) Method max stack and max locals.
abstract Printer	visitMethod(int access, String name, String desc, String signature, String[] exceptions) Class method.
abstract Printer	visitMethodAnnotation(String desc, boolean visible) Method annotation.
abstract void	visitMethodAttribute(Attribute attr) Method attribute.
abstract void	visitMethodEnd() Method end.
void	visitMethodInsn(int opcode, String owner, String name, String desc) Deprecated.
void	visitMethodInsn(int opcode, String owner, String name, String desc, boolean itf) Method instruction.
Printer	visitMethodTypeAnnotation(int typeRef, TypePath typePath, String desc, boolean visible) Method type annotation.
abstract void	visitMultiANewArrayInsn(String desc, int dims) Method instruction.
abstract void	visitOuterClass(String owner, String name, String desc) Class outer class.
void	visitParameter(String name, int access) Method parameter.
abstract Printer	visitParameterAnnotation(int parameter, String desc, boolean visible) Method parameter annotation.
abstract void	visitSource(String file, String debug) Class source.
abstract void	visitTableSwitchInsn(int min, int max, Label dflt, Label... labels) Method instruction.
Printer	visitTryCatchAnnotation(int typeRef, TypePath typePath, String desc, boolean visible) Try catch block type annotation.
abstract void	visitTryCatchBlock(Label start, Label end, Label handler, String type) Method exception handler.
abstract void	visitTypeInsn(int opcode, String type) Method instruction.
abstract void	visitVarInsn(int opcode, int var) Method instruction.

Methods inherited from class java.lang.Object

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

Field Detail

OPCODES

public static final String[] OPCODES

The names of the Java Virtual Machine opcodes.

TYPES

public static final String[] TYPES

The names of the for operand parameter values of the MethodVisitor.visitIntInsn(int, int) method when opcode is NEWARRAY.

HANDLE_TAG

public static final String[] HANDLE_TAG

The names of the tag field values for Handle.

api

protected final int api

The ASM API version implemented by this class. The value of this field must be one of Opcodes.ASM4 or Opcodes.ASM5.

buf

protected final StringBuffer buf

A buffer that can be used to create strings.

text

public final List<Object> text

The text to be printed. Since the code of methods is not necessarily visited in sequential order, one method after the other, but can be interlaced (some instructions from method one, then some instructions from method two, then some instructions from method one again...), it is not possible to print the visited instructions directly to a sequential stream. A class is therefore printed in a two steps process: a string tree is constructed during the visit, and printed to a sequential stream at the end of the visit. This string tree is stored in this field, as a string list that can contain other string lists, which can themselves contain other string lists, and so on.

Constructor Detail

Printer

protected Printer(int api)

Constructs a new Printer.

Method Detail

visit

public abstract void visit(int version,
         int access,
         String name,
         String signature,
         String superName,
         String[] interfaces)

Class header. See ClassVisitor.visit(int, int, java.lang.String, java.lang.String, java.lang.String, java.lang.String[]).

visitSource

public abstract void visitSource(String file,
               String debug)

Class source. See ClassVisitor.visitSource(java.lang.String, java.lang.String).

visitOuterClass

public abstract void visitOuterClass(String owner,
                   String name,
                   String desc)

Class outer class. See ClassVisitor.visitOuterClass(java.lang.String, java.lang.String, java.lang.String).

visitClassAnnotation

public abstract Printer visitClassAnnotation(String desc,
                           boolean visible)

Class annotation. See ClassVisitor.visitAnnotation(java.lang.String, boolean).

visitClassTypeAnnotation

public Printer visitClassTypeAnnotation(int typeRef,
                               TypePath typePath,
                               String desc,
                               boolean visible)

Class type annotation. See ClassVisitor.visitTypeAnnotation(int, org.mvel2.asm.TypePath, java.lang.String, boolean).

visitClassAttribute

public abstract void visitClassAttribute(Attribute attr)

Class attribute. See ClassVisitor.visitAttribute(org.mvel2.asm.Attribute).

visitInnerClass

public abstract void visitInnerClass(String name,
                   String outerName,
                   String innerName,
                   int access)

Class inner name. See ClassVisitor.visitInnerClass(java.lang.String, java.lang.String, java.lang.String, int).

visitField

public abstract Printer visitField(int access,
                 String name,
                 String desc,
                 String signature,
                 Object value)

Class field. See ClassVisitor.visitField(int, java.lang.String, java.lang.String, java.lang.String, java.lang.Object).

visitMethod

public abstract Printer visitMethod(int access,
                  String name,
                  String desc,
                  String signature,
                  String[] exceptions)

Class method. See ClassVisitor.visitMethod(int, java.lang.String, java.lang.String, java.lang.String, java.lang.String[]).

visitClassEnd

public abstract void visitClassEnd()

Class end. See ClassVisitor.visitEnd().

visit

public abstract void visit(String name,
         Object value)

Annotation value. See AnnotationVisitor.visit(java.lang.String, java.lang.Object).

visitEnum

public abstract void visitEnum(String name,
             String desc,
             String value)

Annotation enum value. See AnnotationVisitor.visitEnum(java.lang.String, java.lang.String, java.lang.String).

visitAnnotation

public abstract Printer visitAnnotation(String name,
                      String desc)

Nested annotation value. See AnnotationVisitor.visitAnnotation(java.lang.String, java.lang.String).

visitArray

public abstract Printer visitArray(String name)

Annotation array value. See AnnotationVisitor.visitArray(java.lang.String).

visitAnnotationEnd

public abstract void visitAnnotationEnd()

Annotation end. See AnnotationVisitor.visitEnd().

visitFieldAnnotation

public abstract Printer visitFieldAnnotation(String desc,
                           boolean visible)

Field annotation. See FieldVisitor.visitAnnotation(java.lang.String, boolean).

visitFieldTypeAnnotation

public Printer visitFieldTypeAnnotation(int typeRef,
                               TypePath typePath,
                               String desc,
                               boolean visible)

Field type annotation. See FieldVisitor.visitTypeAnnotation(int, org.mvel2.asm.TypePath, java.lang.String, boolean).

visitFieldAttribute

public abstract void visitFieldAttribute(Attribute attr)

Field attribute. See FieldVisitor.visitAttribute(org.mvel2.asm.Attribute).

visitFieldEnd

public abstract void visitFieldEnd()

Field end. See FieldVisitor.visitEnd().

visitParameter

public void visitParameter(String name,
                  int access)

Method parameter. See MethodVisitor.visitParameter(String, int).

visitAnnotationDefault

public abstract Printer visitAnnotationDefault()

Method default annotation. See MethodVisitor.visitAnnotationDefault().

visitMethodAnnotation

public abstract Printer visitMethodAnnotation(String desc,
                            boolean visible)

Method annotation. See MethodVisitor.visitAnnotation(java.lang.String, boolean).

visitMethodTypeAnnotation

public Printer visitMethodTypeAnnotation(int typeRef,
                                TypePath typePath,
                                String desc,
                                boolean visible)

Method type annotation. See MethodVisitor.visitTypeAnnotation(int, org.mvel2.asm.TypePath, java.lang.String, boolean).

visitParameterAnnotation

public abstract Printer visitParameterAnnotation(int parameter,
                               String desc,
                               boolean visible)

Method parameter annotation. See MethodVisitor.visitParameterAnnotation(int, java.lang.String, boolean).

visitMethodAttribute

public abstract void visitMethodAttribute(Attribute attr)

Method attribute. See MethodVisitor.visitAttribute(org.mvel2.asm.Attribute).

visitCode

public abstract void visitCode()

Method start. See MethodVisitor.visitCode().

visitFrame

public abstract void visitFrame(int type,
              int nLocal,
              Object[] local,
              int nStack,
              Object[] stack)

Method stack frame. See MethodVisitor.visitFrame(int, int, java.lang.Object[], int, java.lang.Object[]).

visitInsn

public abstract void visitInsn(int opcode)

Method instruction. See MethodVisitor.visitInsn(int) .

visitIntInsn

public abstract void visitIntInsn(int opcode,
                int operand)

Method instruction. See MethodVisitor.visitIntInsn(int, int).

visitVarInsn

public abstract void visitVarInsn(int opcode,
                int var)

Method instruction. See MethodVisitor.visitVarInsn(int, int).

visitTypeInsn

public abstract void visitTypeInsn(int opcode,
                 String type)

Method instruction. See MethodVisitor.visitTypeInsn(int, java.lang.String).

visitFieldInsn

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

Method instruction. See MethodVisitor.visitFieldInsn(int, java.lang.String, java.lang.String, java.lang.String).

visitMethodInsn

@Deprecated
public void visitMethodInsn(int opcode,
                              String owner,
                              String name,
                              String desc)

Deprecated.

Method instruction. See MethodVisitor.visitMethodInsn(int, java.lang.String, java.lang.String, java.lang.String).

visitMethodInsn

public void visitMethodInsn(int opcode,
                   String owner,
                   String name,
                   String desc,
                   boolean itf)

Method instruction. See MethodVisitor.visitMethodInsn(int, java.lang.String, java.lang.String, java.lang.String).

visitInvokeDynamicInsn

public abstract void visitInvokeDynamicInsn(String name,
                          String desc,
                          Handle bsm,
                          Object... bsmArgs)

Method instruction. See MethodVisitor.visitInvokeDynamicInsn(java.lang.String, java.lang.String, org.mvel2.asm.Handle, java.lang.Object...).

visitJumpInsn

public abstract void visitJumpInsn(int opcode,
                 Label label)

Method instruction. See MethodVisitor.visitJumpInsn(int, org.mvel2.asm.Label).

visitLabel

public abstract void visitLabel(Label label)

Method label. See MethodVisitor.visitLabel(org.mvel2.asm.Label).

visitLdcInsn

public abstract void visitLdcInsn(Object cst)

Method instruction. See MethodVisitor.visitLdcInsn(java.lang.Object).

visitIincInsn

public abstract void visitIincInsn(int var,
                 int increment)

Method instruction. See MethodVisitor.visitIincInsn(int, int).

visitTableSwitchInsn

public abstract void visitTableSwitchInsn(int min,
                        int max,
                        Label dflt,
                        Label... labels)

Method instruction. See MethodVisitor.visitTableSwitchInsn(int, int, org.mvel2.asm.Label, org.mvel2.asm.Label...).

visitLookupSwitchInsn

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

Method instruction. See MethodVisitor.visitLookupSwitchInsn(org.mvel2.asm.Label, int[], org.mvel2.asm.Label[]).

visitMultiANewArrayInsn

public abstract void visitMultiANewArrayInsn(String desc,
                           int dims)

Method instruction. See MethodVisitor.visitMultiANewArrayInsn(java.lang.String, int).

visitInsnAnnotation

public Printer visitInsnAnnotation(int typeRef,
                          TypePath typePath,
                          String desc,
                          boolean visible)

Instruction type annotation. See MethodVisitor.visitInsnAnnotation(int, org.mvel2.asm.TypePath, java.lang.String, boolean).

visitTryCatchBlock

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

Method exception handler. See MethodVisitor.visitTryCatchBlock(org.mvel2.asm.Label, org.mvel2.asm.Label, org.mvel2.asm.Label, java.lang.String).

visitTryCatchAnnotation

public Printer visitTryCatchAnnotation(int typeRef,
                              TypePath typePath,
                              String desc,
                              boolean visible)

Try catch block type annotation. See MethodVisitor.visitTryCatchAnnotation(int, org.mvel2.asm.TypePath, java.lang.String, boolean).

visitLocalVariable

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

Method debug info. See MethodVisitor.visitLocalVariable(java.lang.String, java.lang.String, java.lang.String, org.mvel2.asm.Label, org.mvel2.asm.Label, int).

visitLocalVariableAnnotation

public Printer visitLocalVariableAnnotation(int typeRef,
                                   TypePath typePath,
                                   Label[] start,
                                   Label[] end,
                                   int[] index,
                                   String desc,
                                   boolean visible)

Local variable type annotation. See MethodVisitor.visitTryCatchAnnotation(int, org.mvel2.asm.TypePath, java.lang.String, boolean).

visitLineNumber

public abstract void visitLineNumber(int line,
                   Label start)

Method debug info. See MethodVisitor.visitLineNumber(int, org.mvel2.asm.Label).

visitMaxs

public abstract void visitMaxs(int maxStack,
             int maxLocals)

Method max stack and max locals. See MethodVisitor.visitMaxs(int, int).

visitMethodEnd

public abstract void visitMethodEnd()

Method end. See MethodVisitor.visitEnd().

getText

public List<Object> getText()

Returns the text constructed by this visitor.

Returns:

the text constructed by this visitor.

print

public void print(PrintWriter pw)

Prints the text constructed by this visitor.

Parameters:

pw - the print writer to be used.

appendString

public static void appendString(StringBuffer buf,
                String s)

Appends a quoted string to a given buffer.

Parameters:

buf - the buffer where the string must be added.

s - the string to be added.