Examples with ClassWriter org.simpleflatmapper.ow2asm.ClassWriter used on opensource projects

Example 16 with ClassWriter

use of org.simpleflatmapper.ow2asm.ClassWriter in project SimpleFlatMapper by arnaudroger.

the class SetterBuilder method createPrimitiveSetter.

public static byte[] createPrimitiveSetter(String className, Method method) throws Exception {
    ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS);
    MethodVisitor mv;
    Class<?> target = method.getDeclaringClass();
    Class<?> primitive = method.getParameterTypes()[0];
    Class<?> property = AsmUtils.wrappers.get(primitive);
    String targetType = toType(target);
    String primitiveType = AsmUtils.primitivesType.get(primitive);
    String propertyType = toType(property);
    String classType = toType(className);
    String methodSuffix = property.getSimpleName();
    if ("Integer".equals(methodSuffix)) {
        methodSuffix = "Int";
    }
    String valueMethodPrefix = methodSuffix.toLowerCase();
    if ("character".equals(valueMethodPrefix)) {
        valueMethodPrefix = "char";
    }
    String setMethod = "set" + methodSuffix;
    String valueMethod = valueMethodPrefix + "Value";
    int primitiveLoadOp = AsmUtils.loadOps.get(primitive);
    cw.visit(V1_6, ACC_PUBLIC + ACC_FINAL + ACC_SUPER, classType, "Ljava/lang/Object;" + "L" + SETTER_TYPE + "<L" + targetType + ";" + AsmUtils.toTargetTypeDeclaration(propertyType) + ">;" + "L" + ORG_SFM_REFLECT_PRIMITIVE + methodSuffix + "Setter<L" + targetType + ";>;", "java/lang/Object", new String[] { SETTER_TYPE, ORG_SFM_REFLECT_PRIMITIVE + "/" + methodSuffix + "Setter" });
    {
        mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
        mv.visitCode();
        mv.visitVarInsn(ALOAD, 0);
        mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false);
        mv.visitInsn(RETURN);
        mv.visitMaxs(1, 1);
        mv.visitEnd();
    }
    {
        mv = cw.visitMethod(ACC_PUBLIC, setMethod, "(" + AsmUtils.toTargetTypeDeclaration(targetType) + primitiveType + ")V", null, new String[] { "java/lang/Exception" });
        mv.visitCode();
        mv.visitVarInsn(ALOAD, 1);
        mv.visitVarInsn(primitiveLoadOp, 2);
        AsmUtils.invoke(mv, target, method.getName(), "(" + primitiveType + ")" + AsmUtils.toTargetTypeDeclaration(method.getReturnType()));
        mv.visitInsn(RETURN);
        mv.visitMaxs(2, 3);
        mv.visitEnd();
    }
    {
        mv = cw.visitMethod(ACC_PUBLIC, "set", "(" + AsmUtils.toTargetTypeDeclaration(targetType) + AsmUtils.toTargetTypeDeclaration(propertyType) + ")V", null, new String[] { "java/lang/Exception" });
        mv.visitCode();
        mv.visitVarInsn(ALOAD, 1);
        mv.visitVarInsn(ALOAD, 2);
        AsmUtils.invoke(mv, property, valueMethod, "()" + primitiveType);
        AsmUtils.invoke(mv, target, method.getName(), "(" + primitiveType + ")" + AsmUtils.toTargetTypeDeclaration(method.getReturnType()));
        mv.visitInsn(RETURN);
        mv.visitMaxs(2, 3);
        mv.visitEnd();
    }
    appendPrimitiveSynthetic(cw, targetType, primitiveType, propertyType, classType, setMethod, primitiveLoadOp);
    appendToString(cw);
    cw.visitEnd();
    return AsmUtils.writeClassToFile(className, cw.toByteArray());
}