TBase TSerializer Issue.

build.log

[INFO]  required: org.apache.thrift.TBase[_ <: org.apache.thrift.TBase, _ <: org.apache.thrift.TFieldIdEnum]
[INFO]       val itemBytes = new TSerializer().serialize(item)
[INFO] 

Example.scala

val item :Item = new Item
val bytes = new TSerializer().serialize(item) //THROWS ABOVE GIVEN ERROR

Item.java

/**
 * Autogenerated by Thrift
 *
 * DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING
 */
package flipkart.platform.queueinterface;

import java.util.List;
import java.util.ArrayList;
import java.util.Map;
import java.util.HashMap;
import java.util.EnumMap;
import java.util.Set;
import java.util.HashSet;
import java.util.EnumSet;
import java.util.Collections;
import java.util.BitSet;
import java.nio.ByteBuffer;
import java.util.Arrays;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class Item implements org.apache.thrift.TBase<Item, Item._Fields>, java.io.Serializable, Cloneable {
  private static final org.apache.thrift.protocol.TStruct STRUCT_DESC = new org.apache.thrift.protocol.TStruct("Item");

  private static final org.apache.thrift.protocol.TField ITEM_ID_FIELD_DESC = new org.apache.thrift.protocol.TField("itemId", org.apache.thrift.protocol.TType.STRING, (short)1);
  private static final org.apache.thrift.protocol.TField DATA_FIELD_DESC = new org.apache.thrift.protocol.TField("data", org.apache.thrift.protocol.TType.STRING, (short)2);
  private static final org.apache.thrift.protocol.TField CREATION_TIME_FIELD_DESC = new org.apache.thrift.protocol.TField("creationTime", org.apache.thrift.protocol.TType.I64, (short)3);
  private static final org.apache.thrift.protocol.TField METADATA_FIELD_DESC = new org.apache.thrift.protocol.TField("metadata", org.apache.thrift.protocol.TType.STRING, (short)4);
  private static final org.apache.thrift.protocol.TField QUEUE_NAME_FIELD_DESC = new org.apache.thrift.protocol.TField("queueName", org.apache.thrift.protocol.TType.STRING, (short)5);

  public String itemId;
  public String data;
  public long creationTime;
  public String metadata;
  public String queueName;

  /** The set of fields this struct contains, along with convenience methods for finding and manipulating them. */
  public enum _Fields implements org.apache.thrift.TFieldIdEnum {
    ITEM_ID((short)1, "itemId"),
    DATA((short)2, "data"),
    CREATION_TIME((short)3, "creationTime"),
    METADATA((short)4, "metadata"),
    QUEUE_NAME((short)5, "queueName");

    private static final Map<String, _Fields> byName = new HashMap<String, _Fields>();

    static {
      for (_Fields field : EnumSet.allOf(_Fields.class)) {
        byName.put(field.getFieldName(), field);
      }
    }

    /**
     * Find the _Fields constant that matches fieldId, or null if its not found.
     */
    public static _Fields findByThriftId(int fieldId) {
      switch(fieldId) {
        case 1: // ITEM_ID
          return ITEM_ID;
        case 2: // DATA
          return DATA;
        case 3: // CREATION_TIME
          return CREATION_TIME;
        case 4: // METADATA
          return METADATA;
        case 5: // QUEUE_NAME
          return QUEUE_NAME;
        default:
          return null;
      }
    }

    /**
     * Find the _Fields constant that matches fieldId, throwing an exception
     * if it is not found.
     */
    public static _Fields findByThriftIdOrThrow(int fieldId) {
      _Fields fields = findByThriftId(fieldId);
      if (fields == null) throw new IllegalArgumentException("Field " + fieldId + " doesn't exist!");
      return fields;
    }

    /**
     * Find the _Fields constant that matches name, or null if its not found.
     */
    public static _Fields findByName(String name) {
      return byName.get(name);
    }

    private final short _thriftId;
    private final String _fieldName;

    _Fields(short thriftId, String fieldName) {
      _thriftId = thriftId;
      _fieldName = fieldName;
    }

    public short getThriftFieldId() {
      return _thriftId;
    }

    public String getFieldName() {
      return _fieldName;
    }
  }

  // isset id assignments
  private static final int __CREATIONTIME_ISSET_ID = 0;
  private BitSet __isset_bit_vector = new BitSet(1);

  public static final Map<_Fields, org.apache.thrift.meta_data.FieldMetaData> metaDataMap;
  static {
    Map<_Fields, org.apache.thrift.meta_data.FieldMetaData> tmpMap = new EnumMap<_Fields, org.apache.thrift.meta_data.FieldMetaData>(_Fields.class);
    tmpMap.put(_Fields.ITEM_ID, new org.apache.thrift.meta_data.FieldMetaData("itemId", org.apache.thrift.TFieldRequirementType.DEFAULT, 
        new org.apache.thrift.meta_data.FieldValueMetaData(org.apache.thrift.protocol.TType.STRING)));
    tmpMap.put(_Fields.DATA, new org.apache.thrift.meta_data.FieldMetaData("data", org.apache.thrift.TFieldRequirementType.DEFAULT, 
        new org.apache.thrift.meta_data.FieldValueMetaData(org.apache.thrift.protocol.TType.STRING)));
    tmpMap.put(_Fields.CREATION_TIME, new org.apache.thrift.meta_data.FieldMetaData("creationTime", org.apache.thrift.TFieldRequirementType.DEFAULT, 
        new org.apache.thrift.meta_data.FieldValueMetaData(org.apache.thrift.protocol.TType.I64)));
    tmpMap.put(_Fields.METADATA, new org.apache.thrift.meta_data.FieldMetaData("metadata", org.apache.thrift.TFieldRequirementType.DEFAULT, 
        new org.apache.thrift.meta_data.FieldValueMetaData(org.apache.thrift.protocol.TType.STRING)));
    tmpMap.put(_Fields.QUEUE_NAME, new org.apache.thrift.meta_data.FieldMetaData("queueName", org.apache.thrift.TFieldRequirementType.DEFAULT, 
        new org.apache.thrift.meta_data.FieldValueMetaData(org.apache.thrift.protocol.TType.STRING)));
    metaDataMap = Collections.unmodifiableMap(tmpMap);
    org.apache.thrift.meta_data.FieldMetaData.addStructMetaDataMap(Item.class, metaDataMap);
  }

  public Item() {
  }

  public Item(
    String itemId,
    String data,
    long creationTime,
    String metadata,
    String queueName)
  {
    this();
    this.itemId = itemId;
    this.data = data;
    this.creationTime = creationTime;
    setCreationTimeIsSet(true);
    this.metadata = metadata;
    this.queueName = queueName;
  }

  /**
   * Performs a deep copy on <i>other</i>.
   */
  public Item(Item other) {
    __isset_bit_vector.clear();
    __isset_bit_vector.or(other.__isset_bit_vector);
    if (other.isSetItemId()) {
      this.itemId = other.itemId;
    }
    if (other.isSetData()) {
      this.data = other.data;
    }
    this.creationTime = other.creationTime;
    if (other.isSetMetadata()) {
      this.metadata = other.metadata;
    }
    if (other.isSetQueueName()) {
      this.queueName = other.queueName;
    }
  }

  public Item deepCopy() {
    return new Item(this);
  }

  @Override
  public void clear() {
    this.itemId = null;
    this.data = null;
    setCreationTimeIsSet(false);
    this.creationTime = 0;
    this.metadata = null;
    this.queueName = null;
  }

  public String getItemId() {
    return this.itemId;
  }

  public Item setItemId(String itemId) {
    this.itemId = itemId;
    return this;
  }

  public void unsetItemId() {
    this.itemId = null;
  }

  /** Returns true if field itemId is set (has been assigned a value) and false otherwise */
  public boolean isSetItemId() {
    return this.itemId != null;
  }

  public void setItemIdIsSet(boolean value) {
    if (!value) {
      this.itemId = null;
    }
  }

  public String getData() {
    return this.data;
  }

  public Item setData(String data) {
    this.data = data;
    return this;
  }

  public void unsetData() {
    this.data = null;
  }

  /** Returns true if field data is set (has been assigned a value) and false otherwise */
  public boolean isSetData() {
    return this.data != null;
  }

  public void setDataIsSet(boolean value) {
    if (!value) {
      this.data = null;
    }
  }

  public long getCreationTime() {
    return this.creationTime;
  }

  public Item setCreationTime(long creationTime) {
    this.creationTime = creationTime;
    setCreationTimeIsSet(true);
    return this;
  }

  public void unsetCreationTime() {
    __isset_bit_vector.clear(__CREATIONTIME_ISSET_ID);
  }

  /** Returns true if field creationTime is set (has been assigned a value) and false otherwise */
  public boolean isSetCreationTime() {
    return __isset_bit_vector.get(__CREATIONTIME_ISSET_ID);
  }

  public void setCreationTimeIsSet(boolean value) {
    __isset_bit_vector.set(__CREATIONTIME_ISSET_ID, value);
  }

  public String getMetadata() {
    return this.metadata;
  }

  public Item setMetadata(String metadata) {
    this.metadata = metadata;
    return this;
  }

  public void unsetMetadata() {
    this.metadata = null;
  }

  /** Returns true if field metadata is set (has been assigned a value) and false otherwise */
  public boolean isSetMetadata() {
    return this.metadata != null;
  }

  public void setMetadataIsSet(boolean value) {
    if (!value) {
      this.metadata = null;
    }
  }

  public String getQueueName() {
    return this.queueName;
  }

  public Item setQueueName(String queueName) {
    this.queueName = queueName;
    return this;
  }

  public void unsetQueueName() {
    this.queueName = null;
  }

  /** Returns true if field queueName is set (has been assigned a value) and false otherwise */
  public boolean isSetQueueName() {
    return this.queueName != null;
  }

  public void setQueueNameIsSet(boolean value) {
    if (!value) {
      this.queueName = null;
    }
  }

  public void setFieldValue(_Fields field, Object value) {
    switch (field) {
    case ITEM_ID:
      if (value == null) {
        unsetItemId();
      } else {
        setItemId((String)value);
      }
      break;

    case DATA:
      if (value == null) {
        unsetData();
      } else {
        setData((String)value);
      }
      break;

    case CREATION_TIME:
      if (value == null) {
        unsetCreationTime();
      } else {
        setCreationTime((Long)value);
      }
      break;

    case METADATA:
      if (value == null) {
        unsetMetadata();
      } else {
        setMetadata((String)value);
      }
      break;

    case QUEUE_NAME:
      if (value == null) {
        unsetQueueName();
      } else {
        setQueueName((String)value);
      }
      break;

    }
  }

  public Object getFieldValue(_Fields field) {
    switch (field) {
    case ITEM_ID:
      return getItemId();

    case DATA:
      return getData();

    case CREATION_TIME:
      return new Long(getCreationTime());

    case METADATA:
      return getMetadata();

    case QUEUE_NAME:
      return getQueueName();

    }
    throw new IllegalStateException();
  }

  /** Returns true if field corresponding to fieldID is set (has been assigned a value) and false otherwise */
  public boolean isSet(_Fields field) {
    if (field == null) {
      throw new IllegalArgumentException();
    }

    switch (field) {
    case ITEM_ID:
      return isSetItemId();
    case DATA:
      return isSetData();
    case CREATION_TIME:
      return isSetCreationTime();
    case METADATA:
      return isSetMetadata();
    case QUEUE_NAME:
      return isSetQueueName();
    }
    throw new IllegalStateException();
  }

  @Override
  public boolean equals(Object that) {
    if (that == null)
      return false;
    if (that instanceof Item)
      return this.equals((Item)that);
    return false;
  }

  public boolean equals(Item that) {
    if (that == null)
      return false;

    boolean this_present_itemId = true && this.isSetItemId();
    boolean that_present_itemId = true && that.isSetItemId();
    if (this_present_itemId || that_present_itemId) {
      if (!(this_present_itemId && that_present_itemId))
        return false;
      if (!this.itemId.equals(that.itemId))
        return false;
    }

    boolean this_present_data = true && this.isSetData();
    boolean that_present_data = true && that.isSetData();
    if (this_present_data || that_present_data) {
      if (!(this_present_data && that_present_data))
        return false;
      if (!this.data.equals(that.data))
        return false;
    }

    boolean this_present_creationTime = true;
    boolean that_present_creationTime = true;
    if (this_present_creationTime || that_present_creationTime) {
      if (!(this_present_creationTime && that_present_creationTime))
        return false;
      if (this.creationTime != that.creationTime)
        return false;
    }

    boolean this_present_metadata = true && this.isSetMetadata();
    boolean that_present_metadata = true && that.isSetMetadata();
    if (this_present_metadata || that_present_metadata) {
      if (!(this_present_metadata && that_present_metadata))
        return false;
      if (!this.metadata.equals(that.metadata))
        return false;
    }

    boolean this_present_queueName = true && this.isSetQueueName();
    boolean that_present_queueName = true && that.isSetQueueName();
    if (this_present_queueName || that_present_queueName) {
      if (!(this_present_queueName && that_present_queueName))
        return false;
      if (!this.queueName.equals(that.queueName))
        return false;
    }

    return true;
  }

  @Override
  public int hashCode() {
    return 0;
  }

  public int compareTo(Item other) {
    if (!getClass().equals(other.getClass())) {
      return getClass().getName().compareTo(other.getClass().getName());
    }

    int lastComparison = 0;
    Item typedOther = (Item)other;

    lastComparison = Boolean.valueOf(isSetItemId()).compareTo(typedOther.isSetItemId());
    if (lastComparison != 0) {
      return lastComparison;
    }
    if (isSetItemId()) {
      lastComparison = org.apache.thrift.TBaseHelper.compareTo(this.itemId, typedOther.itemId);
      if (lastComparison != 0) {
        return lastComparison;
      }
    }
    lastComparison = Boolean.valueOf(isSetData()).compareTo(typedOther.isSetData());
    if (lastComparison != 0) {
      return lastComparison;
    }
    if (isSetData()) {
      lastComparison = org.apache.thrift.TBaseHelper.compareTo(this.data, typedOther.data);
      if (lastComparison != 0) {
        return lastComparison;
      }
    }
    lastComparison = Boolean.valueOf(isSetCreationTime()).compareTo(typedOther.isSetCreationTime());
    if (lastComparison != 0) {
      return lastComparison;
    }
    if (isSetCreationTime()) {
      lastComparison = org.apache.thrift.TBaseHelper.compareTo(this.creationTime, typedOther.creationTime);
      if (lastComparison != 0) {
        return lastComparison;
      }
    }
    lastComparison = Boolean.valueOf(isSetMetadata()).compareTo(typedOther.isSetMetadata());
    if (lastComparison != 0) {
      return lastComparison;
    }
    if (isSetMetadata()) {
      lastComparison = org.apache.thrift.TBaseHelper.compareTo(this.metadata, typedOther.metadata);
      if (lastComparison != 0) {
        return lastComparison;
      }
    }
    lastComparison = Boolean.valueOf(isSetQueueName()).compareTo(typedOther.isSetQueueName());
    if (lastComparison != 0) {
      return lastComparison;
    }
    if (isSetQueueName()) {
      lastComparison = org.apache.thrift.TBaseHelper.compareTo(this.queueName, typedOther.queueName);
      if (lastComparison != 0) {
        return lastComparison;
      }
    }
    return 0;
  }

  public _Fields fieldForId(int fieldId) {
    return _Fields.findByThriftId(fieldId);
  }

  public void read(org.apache.thrift.protocol.TProtocol iprot) throws org.apache.thrift.TException {
    org.apache.thrift.protocol.TField field;
    iprot.readStructBegin();
    while (true)
    {
      field = iprot.readFieldBegin();
      if (field.type == org.apache.thrift.protocol.TType.STOP) { 
        break;
      }
      switch (field.id) {
        case 1: // ITEM_ID
          if (field.type == org.apache.thrift.protocol.TType.STRING) {
            this.itemId = iprot.readString();
          } else { 
            org.apache.thrift.protocol.TProtocolUtil.skip(iprot, field.type);
          }
          break;
        case 2: // DATA
          if (field.type == org.apache.thrift.protocol.TType.STRING) {
            this.data = iprot.readString();
          } else { 
            org.apache.thrift.protocol.TProtocolUtil.skip(iprot, field.type);
          }
          break;
        case 3: // CREATION_TIME
          if (field.type == org.apache.thrift.protocol.TType.I64) {
            this.creationTime = iprot.readI64();
            setCreationTimeIsSet(true);
          } else { 
            org.apache.thrift.protocol.TProtocolUtil.skip(iprot, field.type);
          }
          break;
        case 4: // METADATA
          if (field.type == org.apache.thrift.protocol.TType.STRING) {
            this.metadata = iprot.readString();
          } else { 
            org.apache.thrift.protocol.TProtocolUtil.skip(iprot, field.type);
          }
          break;
        case 5: // QUEUE_NAME
          if (field.type == org.apache.thrift.protocol.TType.STRING) {
            this.queueName = iprot.readString();
          } else { 
            org.apache.thrift.protocol.TProtocolUtil.skip(iprot, field.type);
          }
          break;
        default:
          org.apache.thrift.protocol.TProtocolUtil.skip(iprot, field.type);
      }
      iprot.readFieldEnd();
    }
    iprot.readStructEnd();

    // check for required fields of primitive type, which can't be checked in the validate method
    validate();
  }

  public void write(org.apache.thrift.protocol.TProtocol oprot) throws org.apache.thrift.TException {
    validate();

    oprot.writeStructBegin(STRUCT_DESC);
    if (this.itemId != null) {
      oprot.writeFieldBegin(ITEM_ID_FIELD_DESC);
      oprot.writeString(this.itemId);
      oprot.writeFieldEnd();
    }
    if (this.data != null) {
      oprot.writeFieldBegin(DATA_FIELD_DESC);
      oprot.writeString(this.data);
      oprot.writeFieldEnd();
    }
    oprot.writeFieldBegin(CREATION_TIME_FIELD_DESC);
    oprot.writeI64(this.creationTime);
    oprot.writeFieldEnd();
    if (this.metadata != null) {
      oprot.writeFieldBegin(METADATA_FIELD_DESC);
      oprot.writeString(this.metadata);
      oprot.writeFieldEnd();
    }
    if (this.queueName != null) {
      oprot.writeFieldBegin(QUEUE_NAME_FIELD_DESC);
      oprot.writeString(this.queueName);
      oprot.writeFieldEnd();
    }
    oprot.writeFieldStop();
    oprot.writeStructEnd();
  }

  @Override
  public String toString() {
    StringBuilder sb = new StringBuilder("Item(");
    boolean first = true;

    sb.append("itemId:");
    if (this.itemId == null) {
      sb.append("null");
    } else {
      sb.append(this.itemId);
    }
    first = false;
    if (!first) sb.append(", ");
    sb.append("data:");
    if (this.data == null) {
      sb.append("null");
    } else {
      sb.append(this.data);
    }
    first = false;
    if (!first) sb.append(", ");
    sb.append("creationTime:");
    sb.append(this.creationTime);
    first = false;
    if (!first) sb.append(", ");
    sb.append("metadata:");
    if (this.metadata == null) {
      sb.append("null");
    } else {
      sb.append(this.metadata);
    }
    first = false;
    if (!first) sb.append(", ");
    sb.append("queueName:");
    if (this.queueName == null) {
      sb.append("null");
    } else {
      sb.append(this.queueName);
    }
    first = false;
    sb.append(")");
    return sb.toString();
  }

  public void validate() throws org.apache.thrift.TException {
    // check for required fields
  }

  private void writeObject(java.io.ObjectOutputStream out) throws java.io.IOException {
    try {
      write(new org.apache.thrift.protocol.TCompactProtocol(new org.apache.thrift.transport.TIOStreamTransport(out)));
    } catch (org.apache.thrift.TException te) {
      throw new java.io.IOException(te);
    }
  }

  private void readObject(java.io.ObjectInputStream in) throws java.io.IOException, ClassNotFoundException {
    try {
      // it doesn't seem like you should have to do this, but java serialization is wacky, and doesn't call the default constructor.
      __isset_bit_vector = new BitSet(1);
      read(new org.apache.thrift.protocol.TCompactProtocol(new org.apache.thrift.transport.TIOStreamTransport(in)));
    } catch (org.apache.thrift.TException te) {
      throw new java.io.IOException(te);
    }
  }

}

TSerializer.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.thrift;

import java.io.ByteArrayOutputStream;
import java.io.UnsupportedEncodingException;

import org.apache.thrift.protocol.TBinaryProtocol;
import org.apache.thrift.protocol.TProtocol;
import org.apache.thrift.protocol.TProtocolFactory;
import org.apache.thrift.transport.TIOStreamTransport;

/**
 * Generic utility for easily serializing objects into a byte array or Java
 * String.
 *
 */
public class TSerializer {

  /**
   * This is the byte array that data is actually serialized into
   */
  private final ByteArrayOutputStream baos_ = new ByteArrayOutputStream();

  /**
   * This transport wraps that byte array
   */
  private final TIOStreamTransport transport_ = new TIOStreamTransport(baos_);

  /**
   * Internal protocol used for serializing objects.
   */
  private TProtocol protocol_;

  /**
   * Create a new TSerializer that uses the TBinaryProtocol by default.
   */
  public TSerializer() {
    this(new TBinaryProtocol.Factory());
  }

  /**
   * Create a new TSerializer. It will use the TProtocol specified by the
   * factory that is passed in.
   *
   * @param protocolFactory Factory to create a protocol
   */
  public TSerializer(TProtocolFactory protocolFactory) {
    protocol_ = protocolFactory.getProtocol(transport_);
  }

  /**
   * Serialize the Thrift object into a byte array. The process is simple,
   * just clear the byte array output, write the object into it, and grab the
   * raw bytes.
   *
   * @param base The object to serialize
   * @return Serialized object in byte[] format
   */
  public byte[] serialize(TBase base) throws TException {
    baos_.reset();
    base.write(protocol_);
    return baos_.toByteArray();
  }

  /**
   * Serialize the Thrift object into a Java string, using a specified
   * character set for encoding.
   *
   * @param base The object to serialize
   * @param charset Valid JVM charset
   * @return Serialized object as a String
   */
  public String toString(TBase base, String charset) throws TException {
    try {
      return new String(serialize(base), charset);
    } catch (UnsupportedEncodingException uex) {
      throw new TException("JVM DOES NOT SUPPORT ENCODING: " + charset);
    }
  }

  /**
   * Serialize the Thrift object into a Java string, using the default JVM
   * charset encoding.
   *
   * @param base The object to serialize
   * @return Serialized object as a String
   */
  public String toString(TBase base) throws TException {
    return new String(serialize(base));
  }
}