contrib/format-pdf/src/main/java/org/apache/drill/exec/store/pdf/PdfRowIterator.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.drill.exec.store.pdf;

import technology.tabula.RectangularTextContainer;
import technology.tabula.Table;

import java.util.Iterator;
import java.util.List;

public class PdfRowIterator implements Iterator<List<RectangularTextContainer>> {
  private final Table table;
  private int rowCounter;

  public PdfRowIterator(Table table) {
    this.table = table;
    this.rowCounter = 0;
  }

  public PdfRowIterator() {
    this.table = null;
    this.rowCounter = 0;
  }


  @Override
  public boolean hasNext() {
    if (table == null) {
      return false;
    }
    return rowCounter < table.getRowCount();
  }

  @Override
  public List<RectangularTextContainer> next() {
    List<RectangularTextContainer> nextRow = PdfUtils.getRow(table, rowCounter);
    rowCounter++;
    return nextRow;
  }
}