Examples with ClassNode org.apache.xbean.asm5.tree.ClassNode used on opensource projects

Example 1 with ClassNode

use of org.apache.xbean.asm5.tree.ClassNode in project apex-core by apache.

the class ASMUtil method getPublicGetter.

/**
   * Get a list of getter methods from classnode asmNode
   * @param asmNode
   * @return empty list if there is no getter method
   */
public static List<MethodNode> getPublicGetter(ClassNode asmNode) {
    List<MethodNode> result = new LinkedList<>();
    @SuppressWarnings("unchecked") List<MethodNode> mList = asmNode.methods;
    for (MethodNode methodNode : mList) {
        // and must be public
        if ((Type.getArgumentTypes(methodNode.desc).length == 0 && Type.getReturnType(methodNode.desc) != Type.VOID_TYPE) && (methodNode.name.startsWith("get") || (methodNode.name.startsWith("is") && Type.getReturnType(methodNode.desc) == Type.BOOLEAN_TYPE)) && isPublic(methodNode.access)) {
            result.add(methodNode);
        }
    }
    return result;
}

Example 2 with ClassNode

use of org.apache.xbean.asm5.tree.ClassNode in project apex-core by apache.

the class CompactUtil method updateCompactClassPortInfo.

public static void updateCompactClassPortInfo(ClassNode cn, CompactClassNode ccn) {
    List<FieldNode> fields = ASMUtil.getPorts(cn);
    List<CompactFieldNode> ports = new LinkedList<>();
    for (FieldNode fn : fields) {
        ports.add(compactFieldNode(fn));
    }
    ccn.setPorts(ports);
}

Example 3 with ClassNode

use of org.apache.xbean.asm5.tree.ClassNode in project apex-malhar by apache.

the class BeanClassGenerator method createAndWriteBeanClass.

/**
 * Creates a class from given field information and writes it to the output stream. Also returns byte[] of compiled
 * class
 *
 * @param fqcn         fully qualified class name
 * @param fieldList    field list describing the class
 * @param outputStream stream to which the class is persisted
 * @throws JSONException
 * @throws IOException
 */
public static byte[] createAndWriteBeanClass(String fqcn, List<TupleSchemaRegistry.SQLFieldInfo> fieldList, FSDataOutputStream outputStream) throws JSONException, IOException {
    ClassNode classNode = new ClassNode();
    // generated class will only run on JRE 1.7 or above
    classNode.version = Opcodes.V1_7;
    classNode.access = Opcodes.ACC_PUBLIC;
    classNode.name = fqcn.replace('.', '/');
    classNode.superName = "java/lang/Object";
    // add default constructor
    addDefaultConstructor(classNode);
    for (TupleSchemaRegistry.SQLFieldInfo fieldInfo : fieldList) {
        String fieldName = fieldInfo.getColumnName();
        String fieldType = fieldInfo.getType().getJavaType().getName();
        String fieldJavaType = getJavaType(fieldType);
        addPrivateField(classNode, fieldName, fieldJavaType);
        String fieldNameForMethods = Character.toUpperCase(fieldName.charAt(0)) + fieldName.substring(1);
        if (fieldJavaType.equals(getJavaType("java.util.Date"))) {
            addDateFields(classNode, fieldName, fieldNameForMethods, "java/util/Date");
        } else {
            addGetter(classNode, fieldName, fieldNameForMethods, fieldJavaType);
            addSetter(classNode, fieldName, fieldNameForMethods, fieldJavaType);
        }
    }
    addToStringMethod(classNode, fieldList);
    addHashCodeMethod(classNode, fieldList);
    addEqualsMethod(classNode, fieldList);
    // Write the class
    ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS | ClassWriter.COMPUTE_FRAMES);
    classNode.accept(cw);
    cw.visitEnd();
    byte[] classBytes = cw.toByteArray();
    if (outputStream != null) {
        outputStream.write(classBytes);
        outputStream.close();
    }
    return classBytes;
}

Example 4 with ClassNode

use of org.apache.xbean.asm5.tree.ClassNode in project apex-malhar by apache.

the class BeanClassGenerator method addHashCodeMethod.

/**
 * This will add a hashCode method for class being generated. <br>
 * Algorithm is as follows: <br>
 * <i><p>
 * int hashCode = 7;
 * for (field: all fields) {
 * hashCode = 23 * hashCode + field.hashCode()
 * }
 * </p></i>
 * <br>
 * <b> For primitive field, hashcode implemenented is similar to the one present in its wrapper class. </b>
 *
 * @param classNode
 * @param fieldList
 * @throws JSONException
 */
@SuppressWarnings("unchecked")
private static void addHashCodeMethod(ClassNode classNode, List<TupleSchemaRegistry.SQLFieldInfo> fieldList) throws JSONException {
    MethodNode hashCodeNode = new MethodNode(Opcodes.ACC_PUBLIC, "hashCode", "()I", null, null);
    hashCodeNode.visitAnnotation("Ljava/lang/Override;", true);
    hashCodeNode.instructions.add(new IntInsnNode(Opcodes.BIPUSH, 7));
    hashCodeNode.instructions.add(new VarInsnNode(Opcodes.ISTORE, 1));
    for (TupleSchemaRegistry.SQLFieldInfo fieldInfo : fieldList) {
        String fieldName = fieldInfo.getColumnName();
        String fieldType = fieldInfo.getType().getJavaType().getName();
        String fieldJavaType = getJavaType(fieldType);
        hashCodeNode.instructions.add(new IntInsnNode(Opcodes.BIPUSH, 23));
        hashCodeNode.instructions.add(new VarInsnNode(Opcodes.ILOAD, 1));
        hashCodeNode.instructions.add(new InsnNode(Opcodes.IMUL));
        hashCodeNode.instructions.add(new VarInsnNode(Opcodes.ALOAD, 0));
        hashCodeNode.instructions.add(new FieldInsnNode(Opcodes.GETFIELD, classNode.name, fieldName, fieldJavaType));
        switch(fieldType) {
            case "boolean":
                LabelNode falseNode = new LabelNode();
                LabelNode trueNode = new LabelNode();
                hashCodeNode.instructions.add(new JumpInsnNode(Opcodes.IFEQ, falseNode));
                hashCodeNode.instructions.add(new IntInsnNode(Opcodes.SIPUSH, 1231));
                hashCodeNode.instructions.add(new JumpInsnNode(Opcodes.GOTO, trueNode));
                hashCodeNode.instructions.add(falseNode);
                hashCodeNode.instructions.add(new IntInsnNode(Opcodes.SIPUSH, 1237));
                hashCodeNode.instructions.add(trueNode);
                break;
            case "byte":
            case "char":
            case "short":
            case "int":
                break;
            case "float":
                hashCodeNode.instructions.add(new MethodInsnNode(Opcodes.INVOKESTATIC, "java/lang/Float", "floatToIntBits", "(F)I", false));
                break;
            case "long":
                hashCodeNode.instructions.add(new VarInsnNode(Opcodes.ALOAD, 0));
                hashCodeNode.instructions.add(new FieldInsnNode(Opcodes.GETFIELD, classNode.name, fieldName, fieldJavaType));
                hashCodeNode.instructions.add(new IntInsnNode(Opcodes.BIPUSH, 32));
                hashCodeNode.instructions.add(new InsnNode(Opcodes.LUSHR));
                hashCodeNode.instructions.add(new InsnNode(Opcodes.LXOR));
                hashCodeNode.instructions.add(new InsnNode(Opcodes.L2I));
                break;
            case "double":
                hashCodeNode.instructions.add(new MethodInsnNode(Opcodes.INVOKESTATIC, "java/lang/Double", "doubleToLongBits", "(D)J", false));
                hashCodeNode.instructions.add(new InsnNode(Opcodes.DUP2));
                hashCodeNode.instructions.add(new VarInsnNode(Opcodes.LSTORE, 2));
                hashCodeNode.instructions.add(new VarInsnNode(Opcodes.LLOAD, 2));
                hashCodeNode.instructions.add(new IntInsnNode(Opcodes.BIPUSH, 32));
                hashCodeNode.instructions.add(new InsnNode(Opcodes.LUSHR));
                hashCodeNode.instructions.add(new InsnNode(Opcodes.LXOR));
                hashCodeNode.instructions.add(new InsnNode(Opcodes.L2I));
                break;
            default:
                String objectOwnerType = fieldType.replace('.', '/');
                LabelNode nullNode = new LabelNode();
                LabelNode continueNode = new LabelNode();
                hashCodeNode.instructions.add(new JumpInsnNode(Opcodes.IFNULL, nullNode));
                hashCodeNode.instructions.add(new VarInsnNode(Opcodes.ALOAD, 0));
                hashCodeNode.instructions.add(new FieldInsnNode(Opcodes.GETFIELD, classNode.name, fieldName, fieldJavaType));
                hashCodeNode.instructions.add(new MethodInsnNode(Opcodes.INVOKEVIRTUAL, objectOwnerType, "hashCode", "()I", false));
                hashCodeNode.instructions.add(new JumpInsnNode(Opcodes.GOTO, continueNode));
                hashCodeNode.instructions.add(nullNode);
                hashCodeNode.instructions.add(new InsnNode(Opcodes.ICONST_0));
                hashCodeNode.instructions.add(continueNode);
                break;
        }
        hashCodeNode.instructions.add(new InsnNode(Opcodes.IADD));
        hashCodeNode.instructions.add(new VarInsnNode(Opcodes.ISTORE, 1));
    }
    hashCodeNode.instructions.add(new VarInsnNode(Opcodes.ILOAD, 1));
    hashCodeNode.instructions.add(new InsnNode(Opcodes.IRETURN));
    classNode.methods.add(hashCodeNode);
}

Example 5 with ClassNode

use of org.apache.xbean.asm5.tree.ClassNode in project apex-malhar by apache.

the class BeanClassGenerator method addToStringMethod.

/**
 * Adds a toString method to underlying class. Uses StringBuilder to generate the final string.
 *
 * @param classNode
 * @param fieldList
 * @throws JSONException
 */
@SuppressWarnings("unchecked")
private static void addToStringMethod(ClassNode classNode, List<TupleSchemaRegistry.SQLFieldInfo> fieldList) throws JSONException {
    MethodNode toStringNode = new MethodNode(Opcodes.ACC_PUBLIC, "toString", "()Ljava/lang/String;", null, null);
    toStringNode.visitAnnotation("Ljava/lang/Override;", true);
    toStringNode.instructions.add(new TypeInsnNode(Opcodes.NEW, "java/lang/StringBuilder"));
    toStringNode.instructions.add(new InsnNode(Opcodes.DUP));
    toStringNode.instructions.add(new LdcInsnNode(classNode.name + "{"));
    toStringNode.instructions.add(new MethodInsnNode(Opcodes.INVOKESPECIAL, "java/lang/StringBuilder", "<init>", "(Ljava/lang/String;)V", false));
    toStringNode.instructions.add(new VarInsnNode(Opcodes.ASTORE, 1));
    toStringNode.instructions.add(new VarInsnNode(Opcodes.ALOAD, 1));
    for (int i = 0; i < fieldList.size(); i++) {
        TupleSchemaRegistry.SQLFieldInfo info = fieldList.get(i);
        String fieldName = info.getColumnName();
        String fieldType = info.getType().getJavaType().getName();
        String fieldJavaType = getJavaType(fieldType);
        if (i != 0) {
            toStringNode.instructions.add(new LdcInsnNode(", "));
            toStringNode.instructions.add(new MethodInsnNode(Opcodes.INVOKEVIRTUAL, "java/lang/StringBuilder", "append", "(Ljava/lang/String;)Ljava/lang/StringBuilder;", false));
        }
        toStringNode.instructions.add(new LdcInsnNode(fieldName + "="));
        toStringNode.instructions.add(new MethodInsnNode(Opcodes.INVOKEVIRTUAL, "java/lang/StringBuilder", "append", "(Ljava/lang/String;)Ljava/lang/StringBuilder;", false));
        toStringNode.instructions.add(new VarInsnNode(Opcodes.ALOAD, 0));
        toStringNode.instructions.add(new FieldInsnNode(Opcodes.GETFIELD, classNode.name, fieldName, fieldJavaType));
        // There is no StringBuilder.append method for short and byte. It takes it as int.
        if (fieldJavaType.equals(Character.toString(typeIdentifierShort)) || fieldJavaType.equals(Character.toString(typeIdentifierByte))) {
            fieldJavaType = "I";
        }
        Character pchar = PRIMITIVE_TYPES.get(fieldType);
        if (pchar == null) {
            // It's not a primitive type. StringBuilder.append method signature takes Object type.
            fieldJavaType = "Ljava/lang/Object;";
        }
        toStringNode.instructions.add(new MethodInsnNode(Opcodes.INVOKEVIRTUAL, "java/lang/StringBuilder", "append", "(" + fieldJavaType + ")Ljava/lang/StringBuilder;", false));
    }
    toStringNode.instructions.add(new LdcInsnNode("}"));
    toStringNode.instructions.add(new MethodInsnNode(Opcodes.INVOKEVIRTUAL, "java/lang/StringBuilder", "append", "(Ljava/lang/String;)Ljava/lang/StringBuilder;", false));
    toStringNode.instructions.add(new InsnNode(Opcodes.POP));
    toStringNode.instructions.add(new VarInsnNode(Opcodes.ALOAD, 1));
    toStringNode.instructions.add(new MethodInsnNode(Opcodes.INVOKEVIRTUAL, "java/lang/StringBuilder", "toString", "()Ljava/lang/String;", false));
    toStringNode.instructions.add(new InsnNode(Opcodes.ARETURN));
    classNode.methods.add(toStringNode);
}