IntervalMonthDayNanoVector.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.arrow.vector;
import static org.apache.arrow.vector.NullCheckingForGet.NULL_CHECKING_ENABLED;
import java.time.Duration;
import java.time.Period;
import org.apache.arrow.memory.ArrowBuf;
import org.apache.arrow.memory.BufferAllocator;
import org.apache.arrow.vector.complex.impl.IntervalMonthDayNanoReaderImpl;
import org.apache.arrow.vector.complex.reader.FieldReader;
import org.apache.arrow.vector.holders.IntervalMonthDayNanoHolder;
import org.apache.arrow.vector.holders.NullableIntervalMonthDayNanoHolder;
import org.apache.arrow.vector.types.Types.MinorType;
import org.apache.arrow.vector.types.pojo.Field;
import org.apache.arrow.vector.types.pojo.FieldType;
import org.apache.arrow.vector.util.TransferPair;
/**
* IntervalMonthDayNanoVector implements a fixed width vector (16 bytes) of interval (month, days
* and nanoseconds) values which could be null. A validity buffer (bit vector) is maintained to
* track which elements in the vector are null.
*
* <p>Month, day and nanoseconds are independent from one another and there is no specific limits
* imposed on their values.
*/
public final class IntervalMonthDayNanoVector extends BaseFixedWidthVector
implements ValueIterableVector<PeriodDuration> {
public static final byte TYPE_WIDTH = 16;
private static final byte DAY_OFFSET = 4;
private static final byte NANOSECOND_OFFSET = 8;
/**
* Instantiate a IntervalMonthDayNanoVector. This doesn't allocate any memory for the data in
* vector.
*
* @param name name of the vector
* @param allocator allocator for memory management.
*/
public IntervalMonthDayNanoVector(String name, BufferAllocator allocator) {
this(name, FieldType.nullable(MinorType.INTERVALMONTHDAYNANO.getType()), allocator);
}
/**
* Instantiate a IntervalMonthDayNanoVector. This doesn't allocate any memory for the data in
* vector.
*
* @param name name of the vector
* @param fieldType type of Field materialized by this vector
* @param allocator allocator for memory management.
*/
public IntervalMonthDayNanoVector(String name, FieldType fieldType, BufferAllocator allocator) {
this(new Field(name, fieldType, null), allocator);
}
/**
* Instantiate a IntervalMonthDayNanoVector. This doesn't allocate any memory for the data in
* vector.
*
* @param field field materialized by this vector
* @param allocator allocator for memory management.
*/
public IntervalMonthDayNanoVector(Field field, BufferAllocator allocator) {
super(field, allocator, TYPE_WIDTH);
}
@Override
protected FieldReader getReaderImpl() {
return new IntervalMonthDayNanoReaderImpl(IntervalMonthDayNanoVector.this);
}
/**
* Get minor type for this vector. The vector holds values belonging to a particular type.
*
* @return {@link org.apache.arrow.vector.types.Types.MinorType}
*/
@Override
public MinorType getMinorType() {
return MinorType.INTERVALMONTHDAYNANO;
}
/*----------------------------------------------------------------*
| |
| vector value retrieval methods |
| |
*----------------------------------------------------------------*/
/**
* Given a data buffer, get the number of months stored at a particular position in the vector.
*
* <p>This method should not be used externally.
*
* @param buffer data buffer
* @param index position of the element.
* @return day value stored at the index.
*/
public static int getMonths(final ArrowBuf buffer, final int index) {
return buffer.getInt((long) index * TYPE_WIDTH);
}
/**
* Given a data buffer, get the number of days stored at a particular position in the vector.
*
* <p>This method should not be used externally.
*
* @param buffer data buffer
* @param index position of the element.
* @return day value stored at the index.
*/
public static int getDays(final ArrowBuf buffer, final int index) {
return buffer.getInt((long) index * TYPE_WIDTH + DAY_OFFSET);
}
/**
* Given a data buffer, get the get the number of nanoseconds stored at a particular position in
* the vector.
*
* <p>This method should not be used externally.
*
* @param buffer data buffer
* @param index position of the element.
* @return nanoseconds value stored at the index.
*/
public static long getNanoseconds(final ArrowBuf buffer, final int index) {
return buffer.getLong((long) index * TYPE_WIDTH + NANOSECOND_OFFSET);
}
/**
* Get the element at the given index from the vector.
*
* @param index position of element
* @return element at given index
*/
public ArrowBuf get(int index) throws IllegalStateException {
if (NULL_CHECKING_ENABLED && isSet(index) == 0) {
return null;
}
return valueBuffer.slice((long) index * TYPE_WIDTH, TYPE_WIDTH);
}
/**
* Get the element at the given index from the vector and sets the state in holder. If element at
* given index is null, holder.isSet will be zero.
*
* @param index position of element
*/
public void get(int index, NullableIntervalMonthDayNanoHolder holder) {
if (isSet(index) == 0) {
holder.isSet = 0;
return;
}
final long startIndex = (long) index * TYPE_WIDTH;
holder.isSet = 1;
holder.months = valueBuffer.getInt(startIndex);
holder.days = valueBuffer.getInt(startIndex + DAY_OFFSET);
holder.nanoseconds = valueBuffer.getLong(startIndex + NANOSECOND_OFFSET);
}
/**
* Same as {@link #get(int)}.
*
* @param index position of element
* @return element at given index
*/
@Override
public PeriodDuration getObject(int index) {
if (isSet(index) == 0) {
return null;
} else {
final long startIndex = (long) index * TYPE_WIDTH;
final int months = valueBuffer.getInt(startIndex);
final int days = valueBuffer.getInt(startIndex + DAY_OFFSET);
final long nanoseconds = valueBuffer.getLong(startIndex + NANOSECOND_OFFSET);
return new PeriodDuration(
Period.ofMonths(months).plusDays(days), Duration.ofNanos(nanoseconds));
}
}
/**
* Get the Interval value at a given index as a {@link StringBuilder} object.
*
* @param index position of the element
* @return String Builder object with Interval value as
*/
public StringBuilder getAsStringBuilder(int index) {
if (isSet(index) == 0) {
return null;
} else {
return getAsStringBuilderHelper(index);
}
}
private StringBuilder getAsStringBuilderHelper(int index) {
return new StringBuilder().append(getObject(index).toString()).append(" ");
}
/*----------------------------------------------------------------*
| |
| vector value setter methods |
| |
*----------------------------------------------------------------*/
/**
* Set the element at the given index to the given value.
*
* @param index position of element
* @param value value of element
*/
public void set(int index, ArrowBuf value) {
BitVectorHelper.setBit(validityBuffer, index);
valueBuffer.setBytes((long) index * TYPE_WIDTH, value, 0, TYPE_WIDTH);
}
/**
* Set the element at the given index to the given value.
*
* @param index position of element
* @param months months component of interval
* @param days days component of interval
* @param nanoseconds nanosecond component of interval
*/
public void set(int index, int months, int days, long nanoseconds) {
final long offsetIndex = (long) index * TYPE_WIDTH;
BitVectorHelper.setBit(validityBuffer, index);
valueBuffer.setInt(offsetIndex, months);
valueBuffer.setInt(offsetIndex + DAY_OFFSET, days);
valueBuffer.setLong((offsetIndex + NANOSECOND_OFFSET), nanoseconds);
}
/**
* Set the element at the given index to the value set in data holder. If the value in holder is
* not indicated as set, element at the given index will be null.
*
* @param index position of element
* @param holder nullable data holder for value of element
*/
public void set(int index, NullableIntervalMonthDayNanoHolder holder)
throws IllegalArgumentException {
if (holder.isSet < 0) {
throw new IllegalArgumentException();
} else if (holder.isSet > 0) {
set(index, holder.months, holder.days, holder.nanoseconds);
} else {
BitVectorHelper.unsetBit(validityBuffer, index);
}
}
/**
* Set the element at the given index to the value set in data holder.
*
* @param index position of element
* @param holder data holder for value of element
*/
public void set(int index, IntervalMonthDayNanoHolder holder) {
set(index, holder.months, holder.days, holder.nanoseconds);
}
/**
* Same as {@link #set(int, ArrowBuf)} except that it handles the case when index is greater than
* or equal to existing value capacity {@link #getValueCapacity()}.
*
* @param index position of element
* @param value value of element
*/
public void setSafe(int index, ArrowBuf value) {
handleSafe(index);
set(index, value);
}
/**
* Same as {@link #set(int, int, int, long)} except that it handles the case when index is greater
* than or equal to existing value capacity {@link #getValueCapacity()}.
*
* @param index position of element
* @param months months for the interval
* @param days days for the interval
* @param nanoseconds nanoseconds for the interval
*/
public void setSafe(int index, int months, int days, long nanoseconds) {
handleSafe(index);
set(index, months, days, nanoseconds);
}
/**
* Same as {@link #set(int, NullableIntervalMonthDayNanoHolder)} except that it handles the case
* when index is greater than or equal to existing value capacity {@link #getValueCapacity()}.
*
* @param index position of element
* @param holder nullable data holder for value of element
*/
public void setSafe(int index, NullableIntervalMonthDayNanoHolder holder)
throws IllegalArgumentException {
handleSafe(index);
set(index, holder);
}
/**
* Same as {@link #set(int, IntervalMonthDayNanoHolder)} except that it handles the case when
* index is greater than or equal to existing value capacity {@link #getValueCapacity()}.
*
* @param index position of element
* @param holder data holder for value of element
*/
public void setSafe(int index, IntervalMonthDayNanoHolder holder) {
handleSafe(index);
set(index, holder);
}
/**
* Store the given value at a particular position in the vector. isSet indicates whether the value
* is NULL or not.
*
* @param index position of the new value
* @param isSet 0 for NULL value, 1 otherwise
* @param months months component of interval
* @param days days component of interval
* @param nanoseconds nanosecond component of interval
*/
public void set(int index, int isSet, int months, int days, long nanoseconds) {
if (isSet > 0) {
set(index, months, days, nanoseconds);
} else {
BitVectorHelper.unsetBit(validityBuffer, index);
}
}
/**
* Same as {@link #set(int, int, int, int, long)} except that it handles the case when index is
* greater than or equal to current value capacity of the vector.
*
* @param index position of the new value
* @param isSet 0 for NULL value, 1 otherwise
* @param months months component of interval
* @param days days component of interval
* @param nanoseconds nanosecond component of interval
*/
public void setSafe(int index, int isSet, int months, int days, long nanoseconds) {
handleSafe(index);
set(index, isSet, months, days, nanoseconds);
}
/*----------------------------------------------------------------*
| |
| vector transfer |
| |
*----------------------------------------------------------------*/
/**
* Construct a TransferPair comprising this and a target vector of the same type.
*
* @param ref name of the target vector
* @param allocator allocator for the target vector
* @return {@link TransferPair}
*/
@Override
public TransferPair getTransferPair(String ref, BufferAllocator allocator) {
return new TransferImpl(ref, allocator);
}
/**
* Construct a TransferPair comprising of this and a target vector of the same type.
*
* @param field Field object used by the target vector
* @param allocator allocator for the target vector
* @return {@link TransferPair}
*/
@Override
public TransferPair getTransferPair(Field field, BufferAllocator allocator) {
return new TransferImpl(field, allocator);
}
/**
* Construct a TransferPair with a desired target vector of the same type.
*
* @param to target vector
* @return {@link TransferPair}
*/
@Override
public TransferPair makeTransferPair(ValueVector to) {
return new TransferImpl((IntervalMonthDayNanoVector) to);
}
private class TransferImpl implements TransferPair {
IntervalMonthDayNanoVector to;
public TransferImpl(String ref, BufferAllocator allocator) {
to = new IntervalMonthDayNanoVector(ref, field.getFieldType(), allocator);
}
public TransferImpl(Field field, BufferAllocator allocator) {
to = new IntervalMonthDayNanoVector(field, allocator);
}
public TransferImpl(IntervalMonthDayNanoVector to) {
this.to = to;
}
@Override
public IntervalMonthDayNanoVector getTo() {
return to;
}
@Override
public void transfer() {
transferTo(to);
}
@Override
public void splitAndTransfer(int startIndex, int length) {
splitAndTransferTo(startIndex, length, to);
}
@Override
public void copyValueSafe(int fromIndex, int toIndex) {
to.copyFromSafe(fromIndex, toIndex, IntervalMonthDayNanoVector.this);
}
}
}