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

Example 66 with ClassWriter

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

the class ClassFieldAccessorFactory method dumpWriter.

private static byte[] dumpWriter(final Class<?> originalClass, final String className, final Method getterMethod, final Class<?> fieldType) throws Exception {
    final Class<?> superClass = getWriterSuperClassFor(fieldType);
    final ClassWriter cw = buildClassHeader(superClass, className);
    build3ArgConstructor(superClass, className, cw);
    buildSetMethod(originalClass, className, superClass, getterMethod, fieldType, cw);
    cw.visitEnd();
    return cw.toByteArray();
}

Example 67 with ClassWriter

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

the class ClassFieldAccessorFactory method dumpReader.

private static byte[] dumpReader(final Class<?> originalClass, final String className, final Method getterMethod, final Class<?> fieldType) throws Exception {
    final Class<?> superClass = getReaderSuperClassFor(fieldType);
    final ClassWriter cw = buildClassHeader(superClass, className);
    build3ArgConstructor(superClass, className, cw);
    buildGetMethod(originalClass, className, superClass, getterMethod, cw);
    cw.visitEnd();
    return cw.toByteArray();
}

Example 68 with ClassWriter

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

the class ClassFieldAccessorFactory method buildGetMethod.

/**
 * Creates the proxy reader method for the given method
 */
protected static void buildGetMethod(final Class<?> originalClass, final String className, final Class<?> superClass, final Method getterMethod, final ClassWriter cw) {
    final Class<?> fieldType = getterMethod.getReturnType();
    Method overridingMethod;
    try {
        overridingMethod = superClass.getMethod(getOverridingGetMethodName(fieldType), InternalWorkingMemory.class, Object.class);
    } catch (final Exception e) {
        throw new RuntimeException("This is a bug. Please report back to JBoss Rules team.", e);
    }
    final MethodVisitor mv = cw.visitMethod(Opcodes.ACC_PUBLIC, overridingMethod.getName(), Type.getMethodDescriptor(overridingMethod), null, null);
    mv.visitCode();
    final Label l0 = new Label();
    mv.visitLabel(l0);
    mv.visitVarInsn(Opcodes.ALOAD, 2);
    mv.visitTypeInsn(Opcodes.CHECKCAST, Type.getInternalName(originalClass));
    if (originalClass.isInterface()) {
        mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, Type.getInternalName(originalClass), getterMethod.getName(), Type.getMethodDescriptor(getterMethod));
    } else {
        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, Type.getInternalName(originalClass), getterMethod.getName(), Type.getMethodDescriptor(getterMethod));
    }
    mv.visitInsn(Type.getType(fieldType).getOpcode(Opcodes.IRETURN));
    final Label l1 = new Label();
    mv.visitLabel(l1);
    mv.visitLocalVariable("this", "L" + className + ";", null, l0, l1, 0);
    mv.visitLocalVariable("workingMemory", Type.getDescriptor(InternalWorkingMemory.class), null, l0, l1, 1);
    mv.visitLocalVariable("object", Type.getDescriptor(Object.class), null, l0, l1, 2);
    mv.visitMaxs(0, 0);
    mv.visitEnd();
}

Example 69 with ClassWriter

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

the class ClassFieldAccessorFactory method dumpReader.

private static byte[] dumpReader(final Class<?> originalClass, final String className, final Method getterMethod, final Class<?> fieldType) throws Exception {
    final Class<?> superClass = getReaderSuperClassFor(fieldType);
    final ClassWriter cw = buildClassHeader(superClass, className);
    build3ArgConstructor(superClass, className, cw);
    buildGetMethod(originalClass, className, superClass, getterMethod, cw);
    cw.visitEnd();
    return cw.toByteArray();
}

Example 70 with ClassWriter

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

the class ClassFieldAccessorFactory method buildClassHeader.

/**
 * Builds the class header
 */
protected static ClassWriter buildClassHeader(Class<?> superClass, String className) {
    ClassWriter cw = createClassWriter(superClass.getClassLoader(), Opcodes.ACC_PUBLIC + Opcodes.ACC_SUPER, className, null, Type.getInternalName(superClass), null);
    cw.visitSource(null, null);
    return cw;
}