tajo-common/src/main/java/org/apache/tajo/storage/VTuple.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.tajo.storage;

import com.google.gson.annotations.Expose;
import org.apache.tajo.common.TajoDataTypes;
import org.apache.tajo.datum.Datum;
import org.apache.tajo.datum.IntervalDatum;
import org.apache.tajo.datum.ProtobufDatum;
import org.apache.tajo.util.datetime.TimeMeta;

import java.util.Arrays;

public class VTuple implements Tuple, Cloneable {
  @Expose public Datum [] values;
  @Expose private long offset;

  public VTuple(int size) {
    values = new Datum[size];
  }

  public VTuple(Tuple tuple) {
    this.values = tuple.getValues().clone();
  }

  public VTuple(Datum[] datum) {
    this(datum.length);
    this.values = Arrays.copyOf(datum, datum.length);
  }

  @Override
  public int size() {
    return values.length;
  }

  public boolean contains(int fieldId) {
    return values[fieldId] != null;
  }

  @Override
  public boolean isBlank(int fieldid) {
    return values[fieldid] == null;
  }

  @Override
  public boolean isBlankOrNull(int fieldid) {
    return values[fieldid] == null || values[fieldid].isNull();
  }

  @Override
  public void insertTuple(int fieldId, Tuple tuple) {
    this.put(fieldId, tuple.asDatum(fieldId));
  }

  @Override
  public void clear() {
    clearOffset();
    for (int i=0; i < values.length; i++) {
      values[i] = null;
    }
  }

  //////////////////////////////////////////////////////
  // Setter
  //////////////////////////////////////////////////////
  public void put(int fieldId, Datum value) {
    values[fieldId] = value;
  }

  @Override
  public Datum asDatum(int fieldId) {
    return values[fieldId] == null ? null : values[fieldId];
  }

  @Override
  public TajoDataTypes.Type type(int fieldId) {
    return values[fieldId].type();
  }

  @Override
  public int size(int fieldId) {
    return values[fieldId].size();
  }

  @Override
  public void put(Datum [] values) {
    clearOffset();
    System.arraycopy(values, 0, this.values, 0, values.length);
  }

  //////////////////////////////////////////////////////
  // Getter
  //////////////////////////////////////////////////////
  public Datum get(int fieldId) {
    return this.values[fieldId];
  }

  public void clearOffset() {
    this.offset = -1;
  }

  public void setOffset(long offset) {
    this.offset = offset;
  }

  public long getOffset() {
    return this.offset;
  }

  @Override
  public boolean getBool(int fieldId) {
    return values[fieldId].asBool();
  }

  @Override
  public byte getByte(int fieldId) {
    return values[fieldId].asByte();
  }

  @Override
  public char getChar(int fieldId) {
    return values[fieldId].asChar();
  }

  @Override
  public byte [] getBytes(int fieldId) {
    return values[fieldId].asByteArray();
  }

  @Override
  public byte[] getTextBytes(int fieldId) {
    return values[fieldId].asTextBytes();
  }

  @Override
  public short getInt2(int fieldId) {
    return values[fieldId].asInt2();
  }

  @Override
  public int getInt4(int fieldId) {
    return values[fieldId].asInt4();
  }

  @Override
  public long getInt8(int fieldId) {
    return values[fieldId].asInt8();
  }

  @Override
  public float getFloat4(int fieldId) {
    return values[fieldId].asFloat4();
  }

  @Override
  public double getFloat8(int fieldId) {
    return values[fieldId].asFloat8();
  }

  @Override
  public String getText(int fieldId) {
    return values[fieldId].asChars();
  }

  @Override
  public TimeMeta getTimeDate(int fieldId) {
    return values[fieldId].asTimeMeta();
  }

  @Override
  public ProtobufDatum getProtobufDatum(int fieldId) {
    return (ProtobufDatum) values[fieldId];
  }

  @Override
  public IntervalDatum getInterval(int fieldId) {
    return (IntervalDatum) values[fieldId];
  }

  @Override
  public char[] getUnicodeChars(int fieldId) {
    return values[fieldId].asUnicodeChars();
  }

  @Override
  public VTuple clone() throws CloneNotSupportedException {
    VTuple tuple = (VTuple) super.clone();

    tuple.values = new Datum[values.length];
    System.arraycopy(values, 0, tuple.values, 0, values.length); //shallow copy
    return tuple;
  }

  @Override
  public String toString() {
    return toDisplayString(getValues());
  }

  @Override
  public int hashCode() {
    return Arrays.hashCode(values);
  }

  @Override
  public Datum[] getValues() {
    return values;
  }

  @Override
  public boolean equals(Object obj) {
    if (obj instanceof Tuple) {
      Tuple other = (Tuple) obj;
      return Arrays.equals(getValues(), other.getValues());
    }
    return false;
  }

  public static String toDisplayString(Datum [] values) {
    StringBuilder str = new StringBuilder();
    str.append('(');
    for (Datum datum : values) {
      if (str.length() > 1) {
        str.append(',');
      }
      str.append(datum);
    }
    str.append(')');
    return str.toString();
  }
}