protected ClassWriter buildClassHeader(ClassLoader classLoader, EnumClassDefinition classDef) {
return createClassWriter(
classLoader,
ACC_PUBLIC + ACC_FINAL + ACC_SUPER + ACC_ENUM,
BuildUtils.getInternalType(classDef.getClassName()),
"Ljava/lang/Enum<" + BuildUtils.getTypeDescriptor(classDef.getClassName()) + ">;",
BuildUtils.getInternalType(classDef.getSuperClass()),
BuildUtils.getInternalTypes(classDef.getInterfaces()));
}
protected void buildLiterals(ClassWriter cw, EnumClassDefinition classDef) {
FieldVisitor fv;
for (EnumLiteralDefinition lit : classDef.getEnumLiterals()) {
fv =
cw.visitField(
ACC_PUBLIC + ACC_FINAL + ACC_STATIC + ACC_ENUM,
lit.getName(),
BuildUtils.getTypeDescriptor(classDef.getClassName()),
null,
null);
fv.visitEnd();
}
{
fv =
cw.visitField(
ACC_PRIVATE + ACC_FINAL + ACC_STATIC + ACC_SYNTHETIC,
"$VALUES",
"[" + BuildUtils.getTypeDescriptor(classDef.getClassName()),
null,
null);
fv.visitEnd();
}
}
protected void buildFields(ClassWriter cw, EnumClassDefinition classDef) {
FieldVisitor fv;
for (FieldDefinition fld : classDef.getFieldsDefinitions()) {
fv =
cw.visitField(
ACC_PRIVATE + ACC_FINAL,
fld.getName(),
BuildUtils.getTypeDescriptor(fld.getTypeName()),
null,
null);
fv.visitEnd();
}
{
fv =
cw.visitField(
ACC_PRIVATE + ACC_STATIC, "$context", "Lorg/mvel2/ParserContext;", null, null);
fv.visitEnd();
}
}
protected void buildGettersAndSetters(ClassWriter cw, EnumClassDefinition classDef) {
MethodVisitor mv;
{
mv =
cw.visitMethod(
ACC_PUBLIC + ACC_STATIC,
"values",
"()[" + BuildUtils.getTypeDescriptor(classDef.getClassName()),
null,
null);
mv.visitCode();
mv.visitFieldInsn(
GETSTATIC,
BuildUtils.getInternalType(classDef.getClassName()),
"$VALUES",
"[" + BuildUtils.getTypeDescriptor(classDef.getClassName()));
mv.visitMethodInsn(
INVOKEVIRTUAL,
"[" + BuildUtils.getTypeDescriptor(classDef.getClassName()),
"clone",
"()Ljava/lang/Object;");
mv.visitTypeInsn(CHECKCAST, "[" + BuildUtils.getTypeDescriptor(classDef.getClassName()));
mv.visitInsn(ARETURN);
mv.visitMaxs(1, 0);
mv.visitEnd();
}
for (FieldDefinition fld : classDef.getFieldsDefinitions()) {
mv =
cw.visitMethod(
ACC_PUBLIC,
BuildUtils.getterName(fld.getName(), fld.getTypeName()),
"()" + BuildUtils.getTypeDescriptor(fld.getTypeName()),
null,
null);
mv.visitCode();
mv.visitVarInsn(ALOAD, 0);
mv.visitFieldInsn(
GETFIELD,
BuildUtils.getInternalType(classDef.getName()),
fld.getName(),
BuildUtils.getTypeDescriptor(fld.getTypeName()));
mv.visitInsn(BuildUtils.returnType(fld.getTypeName()));
mv.visitMaxs(BuildUtils.sizeOf(fld.getTypeName()), 1);
mv.visitEnd();
mv =
cw.visitMethod(
ACC_PUBLIC,
BuildUtils.setterName(fld.getName(), fld.getTypeName()),
"(" + BuildUtils.getTypeDescriptor(fld.getTypeName()) + ")V",
null,
null);
mv.visitCode();
mv.visitInsn(RETURN);
mv.visitMaxs(0, 1 + BuildUtils.sizeOf(fld.getTypeName()));
mv.visitEnd();
}
{
mv =
cw.visitMethod(
ACC_PUBLIC + ACC_STATIC, "get$context", "()Lorg/mvel2/ParserContext;", null, null);
mv.visitCode();
mv.visitFieldInsn(
GETSTATIC,
BuildUtils.getInternalType(classDef.getName()),
"$context",
"Lorg/mvel2/ParserContext;");
mv.visitInsn(ARETURN);
mv.visitMaxs(1, 0);
mv.visitEnd();
}
{
mv =
cw.visitMethod(
ACC_PUBLIC + ACC_STATIC, "set$context", "(Lorg/mvel2/ParserContext;)V", null, null);
mv.visitCode();
mv.visitVarInsn(ALOAD, 0);
mv.visitFieldInsn(
PUTSTATIC,
BuildUtils.getInternalType(classDef.getName()),
"$context",
"Lorg/mvel2/ParserContext;");
mv.visitInsn(RETURN);
mv.visitMaxs(1, 1);
mv.visitEnd();
}
}
protected void buildConstructors(ClassWriter cw, EnumClassDefinition classDef)
throws IOException, ClassNotFoundException {
MethodVisitor mv;
String argTypes = "";
int size = 0;
for (FieldDefinition fld : classDef.getFieldsDefinitions()) {
argTypes += BuildUtils.getTypeDescriptor(fld.getTypeName());
size += BuildUtils.sizeOf(fld.getTypeName());
}
{
int ofs = 3;
mv =
cw.visitMethod(
ACC_PRIVATE,
"<init>",
"(Ljava/lang/String;I" + argTypes + ")V",
"(" + argTypes + ")V",
null);
mv.visitCode();
mv.visitVarInsn(ALOAD, 0);
mv.visitVarInsn(ALOAD, 1);
mv.visitVarInsn(ILOAD, 2);
mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Enum", "<init>", "(Ljava/lang/String;I)V");
for (FieldDefinition fld : classDef.getFieldsDefinitions()) {
mv.visitVarInsn(ALOAD, 0);
mv.visitVarInsn(BuildUtils.varType(fld.getTypeName()), ofs);
mv.visitFieldInsn(
PUTFIELD,
BuildUtils.getInternalType(classDef.getName()),
fld.getName(),
BuildUtils.getTypeDescriptor(fld.getTypeName()));
ofs += BuildUtils.sizeOf(fld.getTypeName());
}
mv.visitInsn(RETURN);
mv.visitMaxs(3, ofs);
mv.visitEnd();
}
{
mv = cw.visitMethod(ACC_STATIC, "<clinit>", "()V", null, null);
mv.visitCode();
int N = classDef.getEnumLiterals().size();
mv.visitTypeInsn(NEW, BuildUtils.getInternalType(classDef.getClassName()));
for (int j = 0; j < N; j++) {
EnumLiteralDefinition lit = classDef.getEnumLiterals().get(j);
mv.visitInsn(DUP);
mv.visitLdcInsn(lit.getName());
BuildUtils.pushInt(mv, j);
List<String> args = lit.getConstructorArgs();
for (int k = 0; k < args.size(); k++) {
String argType = classDef.getField(k).getTypeName();
mv.visitLdcInsn(args.get(k));
mv.visitMethodInsn(
INVOKESTATIC, "org/mvel2/MVEL", "eval", "(Ljava/lang/String;)Ljava/lang/Object;");
if (BuildUtils.isPrimitive(argType)) {
mv.visitTypeInsn(CHECKCAST, BuildUtils.getInternalType(BuildUtils.box(argType)));
mv.visitMethodInsn(
INVOKEVIRTUAL,
BuildUtils.getInternalType(BuildUtils.box(argType)),
BuildUtils.numericMorph(BuildUtils.box(argType)),
"()" + BuildUtils.getTypeDescriptor(argType));
} else {
mv.visitTypeInsn(CHECKCAST, BuildUtils.getInternalType(argType));
}
}
mv.visitMethodInsn(
INVOKESPECIAL,
BuildUtils.getInternalType(classDef.getClassName()),
"<init>",
"(Ljava/lang/String;I" + argTypes + ")V");
mv.visitFieldInsn(
PUTSTATIC,
BuildUtils.getInternalType(classDef.getClassName()),
lit.getName(),
BuildUtils.getTypeDescriptor(classDef.getClassName()));
mv.visitTypeInsn(NEW, BuildUtils.getInternalType(classDef.getClassName()));
}
BuildUtils.pushInt(mv, N);
mv.visitTypeInsn(ANEWARRAY, BuildUtils.getInternalType(classDef.getClassName()));
for (int j = 0; j < N; j++) {
EnumLiteralDefinition lit = classDef.getEnumLiterals().get(j);
mv.visitInsn(DUP);
BuildUtils.pushInt(mv, j);
mv.visitFieldInsn(
GETSTATIC,
BuildUtils.getInternalType(classDef.getClassName()),
lit.getName(),
BuildUtils.getTypeDescriptor(classDef.getClassName()));
mv.visitInsn(AASTORE);
}
mv.visitFieldInsn(
PUTSTATIC,
BuildUtils.getInternalType(classDef.getClassName()),
"$VALUES",
"[" + BuildUtils.getTypeDescriptor(classDef.getClassName()));
mv.visitInsn(RETURN);
mv.visitMaxs(4 + size, 0);
mv.visitEnd();
}
{
mv =
cw.visitMethod(
ACC_PUBLIC + ACC_STATIC,
"valueOf",
"(Ljava/lang/String;)" + BuildUtils.getTypeDescriptor(classDef.getClassName()),
null,
null);
mv.visitCode();
mv.visitLdcInsn(Type.getType(BuildUtils.getTypeDescriptor(classDef.getClassName())));
mv.visitVarInsn(ALOAD, 0);
mv.visitMethodInsn(
INVOKESTATIC,
"java/lang/Enum",
"valueOf",
"(Ljava/lang/Class;Ljava/lang/String;)Ljava/lang/Enum;");
mv.visitTypeInsn(CHECKCAST, BuildUtils.getInternalType(classDef.getClassName()));
mv.visitInsn(ARETURN);
mv.visitMaxs(2, 1);
mv.visitEnd();
}
}