parquet-column/src/main/java/parquet/column/values/boundedint/ZeroIntegerValuesReader.java

/**
 * Copyright 2012 Twitter, Inc.
 *
 * Licensed 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 parquet.column.values.boundedint;

import java.io.IOException;

import parquet.column.values.ValuesReader;

/**
 * ColumnReader which does not read any actual data, but rather simply produces
 * an endless stream of constant values.
 * Mainly used to read definition levels when the only possible value is 0
 */
public class ZeroIntegerValuesReader extends ValuesReader {

  public int readInteger() {
    return 0;
  }

  @Override
  public int initFromPage(long valueCount, byte[] in, int offset) throws IOException {
    return offset;
  }

  @Override
  public void skip() {
  }

}