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java.lang.Objectcom.sleepycat.asm.ClassVisitor
com.sleepycat.persist.model.BytecodeEnhancer
class BytecodeEnhancer
An ASM ClassVisitor that examines a class, throws NotPersistentException if it is not persistent, or enhances it if it is persistent. A class is persistent if it contains the @Entity or @Persistent annotations. A resulting enhanced class implements the com.sleepycat.persist.impl.Enhanced interface.
NotPersistentException is thrown to abort the transformation in order to avoid making two passes over the class file (one to look for the annotations and another to enhance the bytecode) or outputing a class that isn't enhanced. By aborting the transformation as soon as we detect that the annotations are missing, we make only one partial pass for a non-persistent class.
Nested Class Summary | |
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(package private) static class |
BytecodeEnhancer.NotPersistentException
Thrown when we determine that a class is not persistent. |
Field Summary |
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Fields inherited from class com.sleepycat.asm.ClassVisitor |
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api, cv |
Constructor Summary | |
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BytecodeEnhancer(ClassVisitor parentVisitor)
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Method Summary | |
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(package private) static String |
getPrimitiveWrapperClass(int primitiveSort)
Returns the wrapper class for a primitive. |
(package private) static boolean |
isSimpleRefType(String className)
Returns true if the given class is a primitive wrapper, Date or String. |
void |
visit(int version,
int access,
String name,
String sig,
String superName,
String[] interfaces)
Visits the header of the class. |
AnnotationVisitor |
visitAnnotation(String desc,
boolean visible)
Visits an annotation of the class. |
void |
visitEnd()
Visits the end of the class. |
FieldVisitor |
visitField(int access,
String name,
String desc,
String sig,
Object value)
Visits a field of the class. |
MethodVisitor |
visitMethod(int access,
String name,
String desc,
String sig,
String[] exceptions)
Visits a method of the class. |
void |
visitSource(String source,
String debug)
Visits the source of the class. |
Methods inherited from class com.sleepycat.asm.ClassVisitor |
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visitAttribute, visitInnerClass, visitOuterClass |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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BytecodeEnhancer(ClassVisitor parentVisitor)
Method Detail |
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public void visit(int version, int access, String name, String sig, String superName, String[] interfaces)
ClassVisitor
visit
in class ClassVisitor
version
- the class version.access
- the class's access flags (see Opcodes
). This
parameter also indicates if the class is deprecated.name
- the internal name of the class (see
getInternalName
).sig
- the signature of this class. May be null if
the class is not a generic one, and does not extend or implement
generic classes or interfaces.superName
- the internal of name of the super class (see
getInternalName
). For interfaces,
the super class is Object
. May be null, but
only for the Object
class.interfaces
- the internal names of the class's interfaces (see
getInternalName
). May be
null.public void visitSource(String source, String debug)
ClassVisitor
visitSource
in class ClassVisitor
source
- the name of the source file from which the class was
compiled. May be null.debug
- additional debug information to compute the correspondance
between source and compiled elements of the class. May be
null.public AnnotationVisitor visitAnnotation(String desc, boolean visible)
ClassVisitor
visitAnnotation
in class ClassVisitor
desc
- the class descriptor of the annotation class.visible
- true if the annotation is visible at runtime.
public FieldVisitor visitField(int access, String name, String desc, String sig, Object value)
ClassVisitor
visitField
in class ClassVisitor
access
- the field's access flags (see Opcodes
). This
parameter also indicates if the field is synthetic and/or
deprecated.name
- the field's name.desc
- the field's descriptor (see Type
).sig
- the field's signature. May be null if the
field's type does not use generic types.value
- the field's initial value. This parameter, which may be
null if the field does not have an initial value, must
be an Integer
, a Float
, a Long
, a
Double
or a String
(for int,
float, long or String fields
respectively). This parameter is only used for static fields.
Its value is ignored for non static fields, which must be
initialized through bytecode instructions in constructors or
methods.
public MethodVisitor visitMethod(int access, String name, String desc, String sig, String[] exceptions)
ClassVisitor
MethodVisitor
instance (or null) each time it is
called, i.e., it should not return a previously returned visitor.
visitMethod
in class ClassVisitor
access
- the method's access flags (see Opcodes
). This
parameter also indicates if the method is synthetic and/or
deprecated.name
- the method's name.desc
- the method's descriptor (see Type
).sig
- the method's signature. May be null if the
method parameters, return type and exceptions do not use generic
types.exceptions
- the internal names of the method's exception classes
(see getInternalName
). May be
null.
public void visitEnd()
ClassVisitor
visitEnd
in class ClassVisitor
static boolean isSimpleRefType(String className)
static String getPrimitiveWrapperClass(int primitiveSort)
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