Examples with ClassWriter org.mvel2.asm.ClassWriter used on opensource projects

Example 1 with ClassWriter

use of org.mvel2.asm.ClassWriter in project drools by kiegroup.

the class DefaultEnumClassBuilder method buildLiterals.

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();
    }
}

Example 2 with ClassWriter

use of org.mvel2.asm.ClassWriter in project drools by kiegroup.

the class DefaultEnumClassBuilder method buildConstructors.

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();
    }
}

Example 3 with ClassWriter

use of org.mvel2.asm.ClassWriter in project drools by kiegroup.

the class DefaultEnumClassBuilder method buildFields.

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();
    }
}

Example 4 with ClassWriter

use of org.mvel2.asm.ClassWriter in project drools by kiegroup.

the class DefaultEnumClassBuilder method buildGettersAndSetters.

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();
    }
}

Example 5 with ClassWriter

use of org.mvel2.asm.ClassWriter in project drools by kiegroup.

the class TraitClassBuilderImpl method buildSetter.

protected void buildSetter(ClassWriter cw, FieldDefinition field, String name, String type, String generic) {
    MethodVisitor mv = cw.visitMethod(ACC_PUBLIC + ACC_ABSTRACT, BuildUtils.setterName(name, type), "(" + BuildUtils.getTypeDescriptor(type) + ")V", generic == null ? null : "(" + BuildUtils.getTypeDescriptor(type).replace(";", "<" + BuildUtils.getTypeDescriptor(generic) + ">;") + ")V", null);
    mv.visitEnd();
}