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

Example 11 with ClassNode

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

the class BeanClassGenerator method addDateFields.

/**
 * Date field is explicitly handled and provided with 3 variants of types of same data.
 * 1. java.util.Date format
 * 2. long - Epoc time in ms
 * 3. int - Epoc time in sec rounded to date
 *
 * This is purposefully done because SQL operations on Date etc happens on long or int based on whether its a SQL DATE
 * field OR SQL TIMESTAMP field. Hence to cater to that 2 more variant of the same data is added to the POJO.
 */
@SuppressWarnings("unchecked")
private static void addDateFields(ClassNode classNode, String fieldName, String fieldNameForMethods, String type) {
    FieldNode fieldNodeSec = new FieldNode(Opcodes.ACC_PRIVATE, fieldName + "Sec", getJavaType("java.lang.Integer"), null, null);
    classNode.fields.add(fieldNodeSec);
    FieldNode fieldNodeMs = new FieldNode(Opcodes.ACC_PRIVATE, fieldName + "Ms", getJavaType("java.lang.Long"), null, null);
    classNode.fields.add(fieldNodeMs);
    // Create getter for Date
    MethodNode getterNodeDate = new MethodNode(Opcodes.ACC_PUBLIC, "get" + fieldNameForMethods, "()L" + type + ";", null, null);
    getterNodeDate.instructions.add(new VarInsnNode(Opcodes.ALOAD, 0));
    getterNodeDate.instructions.add(new FieldInsnNode(Opcodes.GETFIELD, classNode.name, fieldName, "L" + type + ";"));
    getterNodeDate.instructions.add(new InsnNode(Opcodes.ARETURN));
    classNode.methods.add(getterNodeDate);
    // Create getter for Sec
    MethodNode getterNodeSec = new MethodNode(Opcodes.ACC_PUBLIC, "get" + fieldNameForMethods + "Sec", "()Ljava/lang/Integer;", null, null);
    getterNodeSec.instructions.add(new VarInsnNode(Opcodes.ALOAD, 0));
    getterNodeSec.instructions.add(new FieldInsnNode(Opcodes.GETFIELD, classNode.name, fieldName + "Sec", "Ljava/lang/Integer;"));
    getterNodeSec.instructions.add(new InsnNode(Opcodes.ARETURN));
    classNode.methods.add(getterNodeSec);
    // Create getter for Ms
    MethodNode getterNodeMs = new MethodNode(Opcodes.ACC_PUBLIC, "get" + fieldNameForMethods + "Ms", "()Ljava/lang/Long;", null, null);
    getterNodeMs.instructions.add(new VarInsnNode(Opcodes.ALOAD, 0));
    getterNodeMs.instructions.add(new FieldInsnNode(Opcodes.GETFIELD, classNode.name, fieldName + "Ms", "Ljava/lang/Long;"));
    getterNodeMs.instructions.add(new InsnNode(Opcodes.ARETURN));
    classNode.methods.add(getterNodeMs);
    // Create setter for Date
    MethodNode setterNodeDate = new MethodNode(Opcodes.ACC_PUBLIC, "set" + fieldNameForMethods, "(L" + type + ";)V", null, null);
    setterNodeDate.instructions.add(new VarInsnNode(Opcodes.ALOAD, 0));
    setterNodeDate.instructions.add(new VarInsnNode(Opcodes.ALOAD, 1));
    setterNodeDate.instructions.add(new FieldInsnNode(Opcodes.PUTFIELD, classNode.name, fieldName, "L" + type + ";"));
    setterNodeDate.instructions.add(new VarInsnNode(Opcodes.ALOAD, 0));
    setterNodeDate.instructions.add(new VarInsnNode(Opcodes.ALOAD, 1));
    setterNodeDate.instructions.add(new MethodInsnNode(Opcodes.INVOKEVIRTUAL, type, "getTime", "()J", false));
    setterNodeDate.instructions.add(new LdcInsnNode(new Long(1000)));
    setterNodeDate.instructions.add(new InsnNode(Opcodes.LDIV));
    setterNodeDate.instructions.add(new InsnNode(Opcodes.L2I));
    setterNodeDate.instructions.add(new MethodInsnNode(Opcodes.INVOKESTATIC, "java/lang/Integer", "valueOf", "(I)Ljava/lang/Integer;", false));
    setterNodeDate.instructions.add(new FieldInsnNode(Opcodes.PUTFIELD, classNode.name, fieldName + "Sec", "Ljava/lang/Integer;"));
    setterNodeDate.instructions.add(new VarInsnNode(Opcodes.ALOAD, 0));
    setterNodeDate.instructions.add(new VarInsnNode(Opcodes.ALOAD, 1));
    setterNodeDate.instructions.add(new MethodInsnNode(Opcodes.INVOKEVIRTUAL, type, "getTime", "()J", false));
    setterNodeDate.instructions.add(new MethodInsnNode(Opcodes.INVOKESTATIC, "java/lang/Long", "valueOf", "(J)Ljava/lang/Long;", false));
    setterNodeDate.instructions.add(new FieldInsnNode(Opcodes.PUTFIELD, classNode.name, fieldName + "Ms", "Ljava/lang/Long;"));
    setterNodeDate.instructions.add(new InsnNode(Opcodes.RETURN));
    classNode.methods.add(setterNodeDate);
    // Create setter for Sec
    MethodNode setterNodeSec = new MethodNode(Opcodes.ACC_PUBLIC, "set" + fieldNameForMethods + "Sec", "(Ljava/lang/Integer;)V", null, null);
    setterNodeSec.instructions.add(new VarInsnNode(Opcodes.ALOAD, 0));
    setterNodeSec.instructions.add(new TypeInsnNode(Opcodes.NEW, type));
    setterNodeSec.instructions.add(new InsnNode(Opcodes.DUP));
    setterNodeSec.instructions.add(new VarInsnNode(Opcodes.ALOAD, 1));
    setterNodeSec.instructions.add(new MethodInsnNode(Opcodes.INVOKEVIRTUAL, "java/lang/Integer", "intValue", "()I", false));
    setterNodeSec.instructions.add(new InsnNode(Opcodes.I2L));
    setterNodeSec.instructions.add(new LdcInsnNode(new Long(1000)));
    setterNodeSec.instructions.add(new InsnNode(Opcodes.LMUL));
    setterNodeSec.instructions.add(new MethodInsnNode(Opcodes.INVOKESPECIAL, "java/util/Date", "<init>", "(J)V", false));
    setterNodeSec.instructions.add(new FieldInsnNode(Opcodes.PUTFIELD, classNode.name, fieldName, "L" + type + ";"));
    setterNodeSec.instructions.add(new VarInsnNode(Opcodes.ALOAD, 0));
    setterNodeSec.instructions.add(new VarInsnNode(Opcodes.ALOAD, 1));
    setterNodeSec.instructions.add(new FieldInsnNode(Opcodes.PUTFIELD, classNode.name, fieldName + "Sec", "Ljava/lang/Integer;"));
    setterNodeSec.instructions.add(new VarInsnNode(Opcodes.ALOAD, 0));
    setterNodeSec.instructions.add(new TypeInsnNode(Opcodes.NEW, "java/lang/Long"));
    setterNodeSec.instructions.add(new InsnNode(Opcodes.DUP));
    setterNodeSec.instructions.add(new VarInsnNode(Opcodes.ALOAD, 1));
    setterNodeSec.instructions.add(new MethodInsnNode(Opcodes.INVOKEVIRTUAL, "java/lang/Integer", "intValue", "()I", false));
    setterNodeSec.instructions.add(new InsnNode(Opcodes.I2L));
    setterNodeSec.instructions.add(new LdcInsnNode(new Long(1000)));
    setterNodeSec.instructions.add(new InsnNode(Opcodes.LMUL));
    setterNodeSec.instructions.add(new MethodInsnNode(Opcodes.INVOKESPECIAL, "java/lang/Long", "<init>", "(J)V", false));
    setterNodeSec.instructions.add(new FieldInsnNode(Opcodes.PUTFIELD, classNode.name, fieldName + "Ms", "Ljava/lang/Long;"));
    setterNodeSec.instructions.add(new InsnNode(Opcodes.RETURN));
    classNode.methods.add(setterNodeSec);
    // Create setter for Ms
    MethodNode setterNodeMs = new MethodNode(Opcodes.ACC_PUBLIC, "set" + fieldNameForMethods + "Ms", "(Ljava/lang/Long;)V", null, null);
    setterNodeMs.instructions.add(new VarInsnNode(Opcodes.ALOAD, 0));
    setterNodeMs.instructions.add(new TypeInsnNode(Opcodes.NEW, type));
    setterNodeMs.instructions.add(new InsnNode(Opcodes.DUP));
    setterNodeMs.instructions.add(new VarInsnNode(Opcodes.ALOAD, 1));
    setterNodeMs.instructions.add(new MethodInsnNode(Opcodes.INVOKEVIRTUAL, "java/lang/Long", "longValue", "()J", false));
    setterNodeMs.instructions.add(new MethodInsnNode(Opcodes.INVOKESPECIAL, "java/util/Date", "<init>", "(J)V", false));
    setterNodeMs.instructions.add(new FieldInsnNode(Opcodes.PUTFIELD, classNode.name, fieldName, "L" + type + ";"));
    setterNodeMs.instructions.add(new VarInsnNode(Opcodes.ALOAD, 0));
    setterNodeMs.instructions.add(new TypeInsnNode(Opcodes.NEW, "java/lang/Integer"));
    setterNodeMs.instructions.add(new InsnNode(Opcodes.DUP));
    setterNodeMs.instructions.add(new VarInsnNode(Opcodes.ALOAD, 1));
    setterNodeMs.instructions.add(new MethodInsnNode(Opcodes.INVOKEVIRTUAL, "java/lang/Long", "longValue", "()J", false));
    setterNodeMs.instructions.add(new LdcInsnNode(new Long(1000)));
    setterNodeMs.instructions.add(new InsnNode(Opcodes.LDIV));
    setterNodeMs.instructions.add(new InsnNode(Opcodes.L2I));
    setterNodeMs.instructions.add(new MethodInsnNode(Opcodes.INVOKESPECIAL, "java/lang/Integer", "<init>", "(I)V", false));
    setterNodeMs.instructions.add(new FieldInsnNode(Opcodes.PUTFIELD, classNode.name, fieldName + "Sec", "Ljava/lang/Integer;"));
    setterNodeMs.instructions.add(new VarInsnNode(Opcodes.ALOAD, 0));
    setterNodeMs.instructions.add(new VarInsnNode(Opcodes.ALOAD, 1));
    setterNodeMs.instructions.add(new FieldInsnNode(Opcodes.PUTFIELD, classNode.name, fieldName + "Ms", "Ljava/lang/Long;"));
    setterNodeMs.instructions.add(new InsnNode(Opcodes.RETURN));
    classNode.methods.add(setterNodeMs);
}

Example 12 with ClassNode

use of org.apache.xbean.asm5.tree.ClassNode 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 13 with ClassNode

use of org.apache.xbean.asm5.tree.ClassNode 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 14 with ClassNode

use of org.apache.xbean.asm5.tree.ClassNode 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);
}