core/src/main/java/org/apache/accumulo/core/client/mock/MockScanner.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.accumulo.core.client.mock;

import java.io.IOException;
import java.util.Iterator;
import java.util.Map.Entry;
import java.util.concurrent.TimeUnit;

import org.apache.accumulo.core.client.Scanner;
import org.apache.accumulo.core.data.Key;
import org.apache.accumulo.core.data.Range;
import org.apache.accumulo.core.data.Value;
import org.apache.accumulo.core.iterators.Filter;
import org.apache.accumulo.core.iterators.SortedKeyValueIterator;
import org.apache.accumulo.core.iterators.SortedMapIterator;
import org.apache.accumulo.core.security.Authorizations;

/**
 * @deprecated since 1.8.0; use MiniAccumuloCluster or a standard mock framework instead.
 */
@Deprecated
public class MockScanner extends MockScannerBase implements Scanner {

  int batchSize = 0;
  Range range = new Range();

  MockScanner(MockTable table, Authorizations auths) {
    super(table, auths);
  }

  @Deprecated
  @Override
  public void setTimeOut(int timeOut) {
    if (timeOut == Integer.MAX_VALUE)
      setTimeout(Long.MAX_VALUE, TimeUnit.MILLISECONDS);
    else
      setTimeout(timeOut, TimeUnit.SECONDS);
  }

  @Deprecated
  @Override
  public int getTimeOut() {
    long timeout = getTimeout(TimeUnit.SECONDS);
    if (timeout >= Integer.MAX_VALUE)
      return Integer.MAX_VALUE;
    return (int) timeout;
  }

  @Override
  public void setRange(Range range) {
    this.range = range;
  }

  @Override
  public Range getRange() {
    return this.range;
  }

  @Override
  public void setBatchSize(int size) {
    this.batchSize = size;
  }

  @Override
  public int getBatchSize() {
    return this.batchSize;
  }

  @Override
  public void enableIsolation() {}

  @Override
  public void disableIsolation() {}

  static class RangeFilter extends Filter {
    Range range;

    RangeFilter(SortedKeyValueIterator<Key,Value> i, Range range) {
      setSource(i);
      this.range = range;
    }

    @Override
    public boolean accept(Key k, Value v) {
      return range.contains(k);
    }
  }

  @Override
  public Iterator<Entry<Key,Value>> iterator() {
    SortedKeyValueIterator<Key,Value> i = new SortedMapIterator(table.table);
    try {
      i = new RangeFilter(createFilter(i), range);
      i.seek(range, createColumnBSS(fetchedColumns), !fetchedColumns.isEmpty());
      return new IteratorAdapter(i);
    } catch (IOException e) {
      throw new RuntimeException(e);
    }

  }

  @Override
  public long getReadaheadThreshold() {
    return 0;
  }

  @Override
  public void setReadaheadThreshold(long batches) {

  }

}