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

Example 6 with MethodNode

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

the class BeanClassGenerator method addGetter.

/**
 * Add public getter method for given field
 * @param classNode ClassNode which needs to be populated with public getter.
 * @param fieldName Name of the field for which public getter needs to be added.
 * @param fieldNameForMethods Suffix of the getter method, Prefix "is" or "get" is added by this method.
 * @param fieldJavaType Java ASM type of the field
 */
@SuppressWarnings("unchecked")
private static void addGetter(ClassNode classNode, String fieldName, String fieldNameForMethods, String fieldJavaType) {
    String getterSignature = "()" + fieldJavaType;
    MethodNode getterNode = new MethodNode(Opcodes.ACC_PUBLIC, (fieldJavaType.equals(typeIdentifierBoolean) ? "is" : "get") + fieldNameForMethods, getterSignature, null, null);
    getterNode.instructions.add(new VarInsnNode(Opcodes.ALOAD, 0));
    getterNode.instructions.add(new FieldInsnNode(Opcodes.GETFIELD, classNode.name, fieldName, fieldJavaType));
    int returnOpCode;
    if (fieldJavaType.equals(Character.toString(typeIdentifierBoolean)) || fieldJavaType.equals(Character.toString(typeIdentifierByte)) || fieldJavaType.equals(Character.toString(typeIdentifierChar)) || fieldJavaType.equals(Character.toString(typeIdentifierShort)) || fieldJavaType.equals(Character.toString(typeIdentifierInt))) {
        returnOpCode = Opcodes.IRETURN;
    } else if (fieldJavaType.equals(Character.toString(typeIdentifierLong))) {
        returnOpCode = Opcodes.LRETURN;
    } else if (fieldJavaType.equals(Character.toString(typeIdentifierFloat))) {
        returnOpCode = Opcodes.FRETURN;
    } else if (fieldJavaType.equals(Character.toString(typeIdentifierDouble))) {
        returnOpCode = Opcodes.DRETURN;
    } else {
        returnOpCode = Opcodes.ARETURN;
    }
    getterNode.instructions.add(new InsnNode(returnOpCode));
    classNode.methods.add(getterNode);
}

Example 7 with MethodNode

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

the class BeanClassGenerator method addDefaultConstructor.

/**
 * Add Default constructor for POJO
 * @param classNode ClassNode which needs to be populated with constructor
 */
@SuppressWarnings("unchecked")
private static void addDefaultConstructor(ClassNode classNode) {
    MethodNode constructorNode = new MethodNode(Opcodes.ACC_PUBLIC, "<init>", "()V", null, null);
    constructorNode.instructions.add(new VarInsnNode(Opcodes.ALOAD, 0));
    constructorNode.instructions.add(new MethodInsnNode(Opcodes.INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false));
    constructorNode.instructions.add(new InsnNode(Opcodes.RETURN));
    classNode.methods.add(constructorNode);
}

Example 8 with MethodNode

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

the class BeanClassGenerator method addEqualsMethod.

/**
 * Adds a equals method to underlying class. <br>
 * Algorithm is as follows: <br>
 * <i><p>
 * if (this == other) return true;
 * if (other == null) return false;
 * if (other is not instanceof <this class>) return false;
 * for (field: all fields) {
 * if (other.getField() != this.field) return false;
 * }
 * return true;
 * </p></i>
 * <br>
 *
 * @param classNode
 * @param fieldList
 * @throws JSONException
 */
@SuppressWarnings("unchecked")
private static void addEqualsMethod(ClassNode classNode, List<TupleSchemaRegistry.SQLFieldInfo> fieldList) throws JSONException {
    MethodNode equalsNode = new MethodNode(Opcodes.ACC_PUBLIC, "equals", "(Ljava/lang/Object;)Z", null, null);
    equalsNode.visitAnnotation("Ljava/lang/Override;", true);
    LabelNode l0 = new LabelNode();
    LabelNode l1 = new LabelNode();
    LabelNode l2 = new LabelNode();
    LabelNode l3 = new LabelNode();
    LabelNode l4 = new LabelNode();
    equalsNode.instructions.add(new VarInsnNode(Opcodes.ALOAD, 0));
    // if (this == other) return true;
    equalsNode.instructions.add(new VarInsnNode(Opcodes.ALOAD, 1));
    equalsNode.instructions.add(new JumpInsnNode(Opcodes.IF_ACMPNE, l0));
    equalsNode.instructions.add(new InsnNode(Opcodes.ICONST_1));
    equalsNode.instructions.add(new InsnNode(Opcodes.IRETURN));
    equalsNode.instructions.add(l0);
    // if (other == null) return false;
    equalsNode.instructions.add(new VarInsnNode(Opcodes.ALOAD, 1));
    equalsNode.instructions.add(new JumpInsnNode(Opcodes.IFNULL, l1));
    // if (!(other instanceof <this class>)) return false;
    equalsNode.instructions.add(new VarInsnNode(Opcodes.ALOAD, 1));
    equalsNode.instructions.add(new TypeInsnNode(Opcodes.INSTANCEOF, classNode.name));
    equalsNode.instructions.add(new JumpInsnNode(Opcodes.IFNE, l2));
    equalsNode.instructions.add(l1);
    equalsNode.instructions.add(new InsnNode(Opcodes.ICONST_0));
    equalsNode.instructions.add(new InsnNode(Opcodes.IRETURN));
    equalsNode.instructions.add(l2);
    // Check if it other object can cast to <this class>
    equalsNode.instructions.add(new VarInsnNode(Opcodes.ALOAD, 1));
    equalsNode.instructions.add(new TypeInsnNode(Opcodes.CHECKCAST, classNode.name));
    equalsNode.instructions.add(new VarInsnNode(Opcodes.ASTORE, 2));
    for (int i = 0; i < fieldList.size(); i++) {
        boolean isLast = ((i + 1) == fieldList.size());
        TupleSchemaRegistry.SQLFieldInfo info = fieldList.get(i);
        String fieldName = info.getColumnName();
        String fieldType = info.getType().getJavaType().getName();
        String fieldJavaType = getJavaType(fieldType);
        String getterMethodName = (fieldType.equals("boolean") ? "is" : "get") + Character.toUpperCase(fieldName.charAt(0)) + fieldName.substring(1);
        equalsNode.instructions.add(new VarInsnNode(Opcodes.ALOAD, 2));
        equalsNode.instructions.add(new MethodInsnNode(Opcodes.INVOKEVIRTUAL, classNode.name, getterMethodName, "()" + fieldJavaType, false));
        equalsNode.instructions.add(new VarInsnNode(Opcodes.ALOAD, 0));
        equalsNode.instructions.add(new FieldInsnNode(Opcodes.GETFIELD, classNode.name, fieldName, fieldJavaType));
        switch(fieldType) {
            case "boolean":
            case "byte":
            case "char":
            case "short":
            case "int":
                equalsNode.instructions.add(new JumpInsnNode(isLast ? Opcodes.IF_ICMPEQ : Opcodes.IF_ICMPNE, isLast ? l4 : l3));
                break;
            case "long":
                equalsNode.instructions.add(new InsnNode(Opcodes.LCMP));
                equalsNode.instructions.add(new JumpInsnNode(isLast ? Opcodes.IFEQ : Opcodes.IFNE, isLast ? l4 : l3));
                break;
            case "float":
                equalsNode.instructions.add(new InsnNode(Opcodes.FCMPL));
                equalsNode.instructions.add(new JumpInsnNode(isLast ? Opcodes.IFEQ : Opcodes.IFNE, isLast ? l4 : l3));
                break;
            case "double":
                equalsNode.instructions.add(new InsnNode(Opcodes.DCMPL));
                equalsNode.instructions.add(new JumpInsnNode(isLast ? Opcodes.IFEQ : Opcodes.IFNE, isLast ? l4 : l3));
                break;
            default:
                String objectOwnerType = fieldType.replace('.', '/');
                LabelNode nonNullNode = new LabelNode();
                LabelNode continueNode = new LabelNode();
                equalsNode.instructions.add(new JumpInsnNode(Opcodes.IFNONNULL, nonNullNode));
                equalsNode.instructions.add(new JumpInsnNode(isLast ? Opcodes.IFNULL : Opcodes.IFNONNULL, isLast ? l4 : l3));
                equalsNode.instructions.add(new JumpInsnNode(Opcodes.GOTO, continueNode));
                equalsNode.instructions.add(nonNullNode);
                equalsNode.instructions.add(new InsnNode(Opcodes.POP));
                equalsNode.instructions.add(new VarInsnNode(Opcodes.ALOAD, 0));
                equalsNode.instructions.add(new FieldInsnNode(Opcodes.GETFIELD, classNode.name, fieldName, fieldJavaType));
                equalsNode.instructions.add(new VarInsnNode(Opcodes.ALOAD, 2));
                equalsNode.instructions.add(new MethodInsnNode(Opcodes.INVOKEVIRTUAL, classNode.name, getterMethodName, "()" + fieldJavaType, false));
                equalsNode.instructions.add(new MethodInsnNode(Opcodes.INVOKEVIRTUAL, objectOwnerType, "equals", "(Ljava/lang/Object;)Z", false));
                equalsNode.instructions.add(new JumpInsnNode(isLast ? Opcodes.IFNE : Opcodes.IFEQ, isLast ? l4 : l3));
                equalsNode.instructions.add(continueNode);
                break;
        }
    }
    equalsNode.instructions.add(l3);
    equalsNode.instructions.add(new InsnNode(Opcodes.ICONST_0));
    equalsNode.instructions.add(new InsnNode(Opcodes.IRETURN));
    equalsNode.instructions.add(l4);
    equalsNode.instructions.add(new InsnNode(Opcodes.ICONST_1));
    equalsNode.instructions.add(new InsnNode(Opcodes.IRETURN));
    classNode.methods.add(equalsNode);
}

Example 9 with MethodNode

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

the class ASMUtil method getPublicSetter.

/**
 * Get a list of setter methods from classnode asmNode
 * @param asmNode
 * @return empty list if there is no setter method
 */
public static List<MethodNode> getPublicSetter(ClassNode asmNode) {
    List<MethodNode> result = new LinkedList<>();
    @SuppressWarnings("unchecked") List<MethodNode> mList = asmNode.methods;
    for (MethodNode methodNode : mList) {
        if (methodNode.name.startsWith("set") && isPublic(methodNode.access) && Type.getArgumentTypes(methodNode.desc).length == 1 && Type.getReturnType(methodNode.desc) == Type.VOID_TYPE) {
            result.add(methodNode);
        }
    }
    return result;
}

Example 10 with MethodNode

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

the class CompactUtil method compactClassNode.

public static CompactClassNode compactClassNode(ClassNode cn) {
    if (cn == null) {
        return null;
    }
    CompactClassNode ccn = new CompactClassNode();
    ccn.setAccess(cn.access);
    ccn.setDefaultConstructor(compactMethodNode(ASMUtil.getPublicDefaultConstructor(cn)));
    List<CompactMethodNode> cmns = new LinkedList<>();
    for (MethodNode mn : ASMUtil.getPublicGetter(cn)) {
        cmns.add(compactMethodNode(mn));
    }
    ccn.setGetterMethods(cmns);
    cmns = new LinkedList<>();
    for (MethodNode mn : ASMUtil.getPublicSetter(cn)) {
        cmns.add(compactMethodNode(mn));
    }
    ccn.setSetterMethods(cmns);
    ccn.setPorts(new LinkedList<CompactFieldNode>());
    ccn.setName(cn.name);
    List<CompactClassNode> ccns = new LinkedList<>();
    for (Object icn : cn.innerClasses) {
        CompactClassNode inner = new CompactClassNode();
        inner.setName(((InnerClassNode) icn).name);
        inner.setAccess(((InnerClassNode) icn).access);
    }
    ccn.setInnerClasses(ccns);
    if (ASMUtil.isEnum(cn)) {
        ccn.setEnumValues(ASMUtil.getEnumValues(cn));
    }
    if (cn instanceof ClassNodeType) {
        ccn.setCsv(((ClassNodeType) cn).csv);
    }
    // }
    return ccn;
}