TimeStampMilliVector.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.LocalDateTime;
import org.apache.arrow.memory.BufferAllocator;
import org.apache.arrow.vector.complex.impl.TimeStampMilliReaderImpl;
import org.apache.arrow.vector.complex.reader.FieldReader;
import org.apache.arrow.vector.holders.NullableTimeStampMilliHolder;
import org.apache.arrow.vector.holders.TimeStampMilliHolder;
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.DateUtility;
import org.apache.arrow.vector.util.TransferPair;
/**
* TimeStampMilliVector implements a fixed width vector (8 bytes) of timestamp (millisecond
* resolution) values which could be null. A validity buffer (bit vector) is maintained to track
* which elements in the vector are null.
*/
public final class TimeStampMilliVector extends TimeStampVector
implements ValueIterableVector<LocalDateTime> {
/**
* Instantiate a TimeStampMilliVector. This doesn't allocate any memory for the data in vector.
*
* @param name name of the vector
* @param allocator allocator for memory management.
*/
public TimeStampMilliVector(String name, BufferAllocator allocator) {
this(name, FieldType.nullable(MinorType.TIMESTAMPMILLI.getType()), allocator);
}
/**
* Instantiate a TimeStampMilliVector. 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 TimeStampMilliVector(String name, FieldType fieldType, BufferAllocator allocator) {
super(name, fieldType, allocator);
}
/**
* Instantiate a TimeStampMilliVector. 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 TimeStampMilliVector(Field field, BufferAllocator allocator) {
super(field, allocator);
}
@Override
protected FieldReader getReaderImpl() {
return new TimeStampMilliReaderImpl(TimeStampMilliVector.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.TIMESTAMPMILLI;
}
/*----------------------------------------------------------------*
| |
| vector value retrieval methods |
| |
*----------------------------------------------------------------*/
/**
* 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, NullableTimeStampMilliHolder holder) {
if (NULL_CHECKING_ENABLED && isSet(index) == 0) {
holder.isSet = 0;
return;
}
holder.isSet = 1;
holder.value = valueBuffer.getLong((long) index * TYPE_WIDTH);
}
/**
* Same as {@link #get(int)}.
*
* @param index position of element
* @return element at given index
*/
@Override
public LocalDateTime getObject(int index) {
if (isSet(index) == 0) {
return null;
} else {
final long millis = valueBuffer.getLong((long) index * TYPE_WIDTH);
return DateUtility.getLocalDateTimeFromEpochMilli(millis);
}
}
/*----------------------------------------------------------------*
| |
| vector value setter methods |
| |
*----------------------------------------------------------------*/
/**
* 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 in the 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, NullableTimeStampMilliHolder holder) throws IllegalArgumentException {
if (holder.isSet < 0) {
throw new IllegalArgumentException();
} else if (holder.isSet > 0) {
BitVectorHelper.setBit(validityBuffer, index);
setValue(index, holder.value);
} 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, TimeStampMilliHolder holder) {
BitVectorHelper.setBit(validityBuffer, index);
setValue(index, holder.value);
}
/**
* Same as {@link #set(int, NullableTimeStampMilliHolder)} 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, NullableTimeStampMilliHolder holder)
throws IllegalArgumentException {
handleSafe(index);
set(index, holder);
}
/**
* Same as {@link #set(int, TimeStampMilliHolder)} 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, TimeStampMilliHolder holder) {
handleSafe(index);
set(index, holder);
}
/*----------------------------------------------------------------*
| |
| 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) {
TimeStampMilliVector to = new TimeStampMilliVector(ref, field.getFieldType(), allocator);
return new TransferImpl(to);
}
/**
* Construct a TransferPair comprising 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) {
TimeStampMilliVector to = new TimeStampMilliVector(field, allocator);
return new TransferImpl(to);
}
/**
* 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((TimeStampMilliVector) to);
}
}