org.apache.orc.impl.IntegerReader Maven / Gradle / Ivy
/**
* 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.orc.impl;
import java.io.IOException;
import org.apache.hadoop.hive.ql.exec.vector.ColumnVector;
/**
* Interface for reading integers.
*/
public interface IntegerReader {
/**
* Seek to the position provided by index.
* @param index
* @throws IOException
*/
void seek(PositionProvider index) throws IOException;
/**
* Skip number of specified rows.
* @param numValues
* @throws IOException
*/
void skip(long numValues) throws IOException;
/**
* Check if there are any more values left.
* @return
* @throws IOException
*/
boolean hasNext() throws IOException;
/**
* Return the next available value.
* @return
* @throws IOException
*/
long next() throws IOException;
/**
* Return the next available vector for values.
* @param column the column being read
* @param data the vector to read into
* @param length the number of numbers to read
* @throws IOException
*/
void nextVector(ColumnVector column,
long[] data,
int length
) throws IOException;
/**
* Return the next available vector for values. Does not change the
* value of column.isRepeating.
* @param column the column being read
* @param data the vector to read into
* @param length the number of numbers to read
* @throws IOException
*/
void nextVector(ColumnVector column,
int[] data,
int length
) throws IOException;
}